Instructions

Electrochemical Gas Detector

GT3000 Series
Includes Transmitter (GTX)
and Sensor Module (GTS)

11.1 Rev: 8/15 95-8616

 Table of Contents

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
GTS Sensor Module . . . . . . . . . . . . . . . . . . . . . . 1 GT3000 Calibration . . . . . . . . . . . . . . . . . . . . . . 12
GTX Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . 2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . 13
Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . 2
History/Event Logs . . . . . . . . . . . . . . . . . . . . . . . 2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HART Communication . . . . . . . . . . . . . . . . . . . . 3 Routine Inspection . . . . . . . . . . . . . . . . . . . . . . 14
Magnetic Switch . . . . . . . . . . . . . . . . . . . . . . . . . 3 Sensor Module Replacement . . . . . . . . . . . . . . 14
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Device Repair and Return . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Ordering Information . . . . . . . . . . . . . . . . . . 15
Important Safety Notes . . . . . . . . . . . . . . . . . 5
GTS Gas Sensors . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration Kits for Gas Sensors . . . . . . . . . . . . 15
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Parts & Accessories . . . . . . . . . . . . . . . . . . . . . 15
Identification of Vapor(s) to be Detected . . . . . . . 6
Identification of Detector Mounting Locations . . . 6
Device Mounting Orientation . . . . . . . . . . . . . . . . 6 APPENDIX A — FM APPROVAL DESCRIPTION . . . . 18
Detector Installation . . . . . . . . . . . . . . . . . . . . . . 7
APPENDIX B — CSA CERTIFICATION DESCRIPTION . 20
Sensor Termination Box . . . . . . . . . . . . . . . . . . . 7
APPENDIX C — ATEX APPROVAL DESCRIPTION . . 21
wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power Supply Requirements . . . . . . . . . . . . . . . . 7 APPENDIX D — IECEx APPROVAL DESCRIPTION . 22
Wiring Cable Requirements . . . . . . . . . . . . . . . . 7
APPENDIX E — OTHER APPROVALS . . . . . . . . . . . . . 23
Intrinsic Safety Barriers . . . . . . . . . . . . . . . . . . . . 8
Guidelines for Intrinsic Safety Wiring . . . . . . . . . 8 Appendix F — Declaration of Conformity . 24
Wiring Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 8
Appendix G — sensor comparison /
cross sensitivity . . . . . . . . . . . . 25

Appendix H — HART COMMUNICATION . . . . . . . . . 27

Appendix I — CONTROL DRAWINGs . . . . . . . . . . . 29

 INSTRUCTIONS

Electrochemical Gas Detector

GT3000 Series
Includes Transmitter (GTX)
and Sensor Module (GTS)

Sensor
Module
(GTS)

Transmitter Detector (GT3000)

(GTX)

Important that are able to monitor a linear 4-20 mA dc signal. All

Be sure to read and understand the entire alarm functions are provided by the monitoring device.
instruction manual before installing or operating
the gas detection system. This product is The GT3000 is designed and approved as a stand
intended to provide early warning of the presence alone unit for use in hazardous locations. It is suitable
of a toxic or explosive gas mixture, or of oxygen for outdoor applications that require IP66 rating and
depletion. Proper device installation, operation, uses a hydrophobic filter that is easily replaced without
and maintenance are required to ensure safe opening the device or use of tools. The GT3000 is
and effective operation. If this equipment is used furnished as either explosion-proof or intrinsically safe.
in a manner not specified in this manual, safety
protection may be impaired. The GT3000 supports local one-person calibration
with the use of a magnet and on-board LED.

Description GTS SENSOR Module

The GT3000 Electrochemical Gas Detector is an The GTS’s electrochemical sensor cell uses capillary
intelligent stand-alone industrial gas detector, designed diffusion barrier technology for monitoring gas
to provide continuous monitoring of the atmosphere for concentrations in ambient air.
hazardous gas leaks or oxygen depletion. It is fully
performance tested and approved by Factory Mutual.
Live Maintenance
Refer to Appendix F for individual gas specifications.
The hot swappable GTS sensor module is intrinsically
The GT3000 Gas Detector consists of a replaceable safe and allows live maintenance while under power,
sensor module (Model GTS) connected to a transmitter without de‑classifying the hazardous area. When the
module (Model GTX). A single transmitter is sensor is removed, the transmitter generates a fault
compatible with all GTS sensor modules. A variety of output. If a new sensor of the same type and range is
electrochemical sensor models are available in various installed, the fault self-clears. However, if the type or
concentration ranges. range of the new sensor module does not match the
old, the transmitter generates a fault until a successful
The GT3000 is a 2-wire device that generates a 4-20 calibration or acceptance of the new sensor type is
mA output signal with HART communication that is completed. For additional information regarding Live
proportional to the concentration of the target gas. Maintenance, refer to “Sensor Module Replacement” in
the Maintenance section of this manual.
The GT3000 is compatible with FlexVu® Model UD10 and
UD20 Universal Display Units, as well as other devices

11.1 © Detector Electronics Corporation 2015 Rev: 8/15 95-8616

Automatic Sensor Module Recognition HISTORY/Event Logs
The transmitter provides automatic gas sensor Both the transmitter and sensor are able to store 256
recognition, allowing the operator to access the history logs, which are saved in non-volatile memory
following information via HART, or a UD10 or UD20 and retained through power cycles. A UD10/UD20
Universal display: Universal Display Unit, a HART communication device,
• Date of manufacture of the sensor module or AMS software is required to view the history logs.

• Sensor module serial number Sensor Logging Capability

• Gas type
The sensor module logs the following operating
• Measurement range parameters in non‑volatile memory:

The sensor module is factory programmed for the gas • Running Hours - The sensor module maintains the
type and measurement range. When the sensor module total operating hours, and cannot be reset.
powers up, the transmitter reads and acknowledges • Min/Max Temperature - The sensor module
the gas type and measurement range. maintains the minimum and maximum temperatures
with a date and time stamp.
GTX TRANSMITTER • Calibration - The sensor module logs the calibration
The transmitter output is a linear 4-20 mA dc signal history with a date and time stamp, along with the
with HART communication that directly corresponds to success or cause of failure codes. See Table 1. The
0-100% full scale. zero and span values (AD converter values recorded at
the time of calibration) are also saved. This allows the
A 3.8 mA output indicates sensor calibration in progress logs to follow the sensor module when it is calibrated
(17.3 mA for O2 sensor). The GT3000 comes with one separately from the transmitter. (Calibration data is
of two pre-programmed fault output levels: 2.45 mA or available via a UD10/UD20, a HART communication
3.5 mA. device, or AMS software.)
The sensor module gets the current time and date
Priority of output signals from highest to lowest is: from the transmitter and provides calibration log
information to the transmitter. See Figure 1.
Calibration
1
(In progress)
2 Fault Table 1—Calibration Status Codes

3 Gas Level Number Definition

0 EMPTY LOG
1 NOT USED
Transmitter Wiring 2 NOT USED
3 ZERO CAL
The GTX transmitter is a two-wire loop powered device
4 SPAN CAL
that uses a three-wire cable (power, signal, and earth
5 ABORT CAL
ground) for connecting to a controller or monitoring
6 FAILED CAL
device. The use of shielded cable is required.
7 NOT USED
8 NOT USED
Real Time Clock (RTC) 9 INIT CAL LOG
The GTX transmitter has a real time clock with battery 10 NOT USED
back‑up, that is used for time stamping the event logs. 11 CLR CAL FAULTS
The time and date are set and read using a UD10/
UD20 Universal Display Unit, a HART communication
device, or AMS software. The time stamp on the logs
will not be correct if the RTC in the transmitter is not set
correctly.

11.1 2 95-8616
 GT3000
Gas Detector

Transmitter
RTC HART Interface
Event Logs

Transmitter updates Transmitter reads

sensor module calibration logs
time / date from sensor

Sensor Module
Calibration Logs GREEN LED (ON)

YELLOW LED (OFF)

Figure 1—GT3000 Logging
A2450

Transmitter Logging Capability Figure 3— Location of LEDs on GT3000 Gas Detector

The transmitter logs the following events with a time

Magnetic Switch
and date stamp:
• Power-up The GT3000 is furnished with an internal magnetic reed
switch as part of the user interface. The magnetic switch
• Sensor change allows the user to initiate calibration by momentarily
• All Faults. placing a magnet against the housing at the designated
location. See Figure 2.

HART Communication
LEDs
The transmitter supports HART communication on the
4‑20 mA loop. This allows for configuration capability The GT3000 has one green and one yellow LED
and provides device status information, calibration, and (See Figure 3). The LEDs are used to signal normal,
diagnostics capabilities. The GT3000 is compatible calibration, and fault conditions. See Table 2.
with HART interface devices such as a HART handheld
communicator, the Det-Tronics UD10 or UD20 Display Note
Unit, or an AMS system. (See Appendix G for HART The GT3000 does not have alarm setpoints and,
menu structure.) therefore, does not have a red LED.

Table 2—LEDs and Analog Output

During Various Operating Conditions

Analog
Function Green LED Yellow LED 4-20 Signal
Output
MAGNETIC
SWITCH Warm-up* Single Flash On 3.5***
Normal
Steady On Off 4-20
Operation
Fault
Off On 3.5***
Condition
Calibration Off See Table 5 3.8**
No Power Off Off 0
B2443
*Warm-up time can last up to 150 seconds.
**O2 sensor generates 17.3 mA during calibration.
Figure 2—Location of Magnetic Switch on GT3000 Detector ***2.45 for TYPE OUTPUT "29", reference GTX Model Matrix .

11.1 3 95-8616
specifications 6.2
(15.8)
5.6
(14.3)
sensor and transmitter
Available Sensors—
Refer to Appendix F. 2.5
(6.4)

Cross Sensitivity—
See Appendix F for Cross Sensitivity information.
B2397

calibration— Figure 4—Dimensions of GT3000 Gas Detector in Inches (CM)

Sensors are calibrated at the factory. Gas type and
range are read by the transmitter. Field calibration is
initiated at the detector, at the UD10/UD20 Universal Pressure range—
Display Unit, or by some other HART interface device. Atmospheric ±10%.

operating voltage— Ingress Protection—

24 volts dc nominal. (12 Vdc minimum, 30 Vdc maximum). IP66.
Maximum ripple is 2 volts peak-to-peak.
If using the HART function, the installation must comply electro-magnetic compatibility—
with the HART power standard. EMC Directive 2004/108/EC
EN55011 (Emissions)
power consumption— EN50270 (Immunity).
0.8 watt maximum @ 30 Vdc.
Thread options—
current output— 3/4" NPT or M25.
• 4-20 mA (Normal operating mode).
ENCLOSURE MATERIAL—
• 3.8 mA indicates calibrate mode. GTX Transmitter: 316 Stainless Steel
• 3.5 mA or less indicates a fault condition (2.45 mA GTS Sensor Module: PPA (30% carbon filled).
option available).
Dimensions—
maximum loop resistance— See Figure 4.
300 ohms at 18 Vdc, 600 ohms at 24 Vdc.
WARRANTY—(For the GTX and GTS)
Wiring— 12 months from date of installation or 18 months from
The transmitter has flying leads, 20” long, 600V insulation. date of shipment, whichever occurs first.
Colors: Red = V+
Black = V–
CERTIFICATIONs—
Green = earth ground
Gauge: 22 AWG (red and black) ®

16 AWG (green).

Warm-up—
Warm-up time can last up to 150 seconds.
For complete approval details, refer to the appropriate
operating temperature— Appendix:
See Appendix F.
Appendix A - FM
Storage Temperature— Appendix B - CSA
Transmitter: –55°C to +75°C (–67°F to +167°F) Appendix C - ATEX
Sensor: 0°C to +20°C (+32°F to +68°F). Appendix D - IECEx
Ideal: +4°C to +10°C (+39°F to +50°F). Appendix E - Other Approvals

Humidity range—
15 to 90% RH.

11.1 4 95-8616
Important Safety Notes Liabilities
The manufacturer’s warranty for this product is
CAUTION void, and all liability for proper function of the
The wiring procedures in this manual are intended detector is irrevocably transferred to the owner or
to ensure proper functioning of the device under operator in the event that the device is serviced or
normal conditions. However, because of the repaired by personnel not employed or authorized
many variations in wiring codes and regulations, by Detector Electronics Corporation, or if the
total compliance to these ordinances cannot be device is used in a manner not conforming to its
guaranteed. Be certain that all wiring complies intended use.
with the NEC as well as all local codes. If in
doubt, consult the authority having jurisdiction Caution
before wiring the system. Installation must be Observe precautions for handling electrostatic
done by a properly trained person. sensitive devices.

CAUTION NOTE
This product has been tested and approved The sensor housing is made of Polyphthalamide
for use in hazardous areas. However, it must (PPA), 30% carbon filled (Material Manufacturer
be properly installed and used only under the RTP). Questions regarding chemical resistance
conditions specified within this manual and should be addressed to:
the specific approval certificates. Any device www.det-tronics.com
modification, improper installation, or use in a US toll free 800-468-3244 or 952-941-5665
faulty or incomplete configuration will render
warranty and product certifications invalid.

CAUTION
The GT3000 contains no field repairable
components. User performed service is limited
to replacement of the gas sensor module.

CAUTION
Hazardous location temperature limits exceed
the product operational temperature limits. If the
sensor is exposed to temperatures beyond the
operational temperature limits listed in Appendix
F, then the sensor module (GTS) should be
replaced or a response test, as described in
the GT3000 Safety Manual (95-8685), shall be
performed.

11.1 5 95-8616
Installation The most effective number and placement of detectors
varies depending on the conditions on site. The
The gas detector can be installed either in a stand‑alone individual designing the installation must often rely
configuration as a loop powered device, or it can be on experience and common sense to determine the
connected to a UD10/UD20 Universal Display Unit. detector quantity and best locations to adequately
protect the area. Note that it is typically advantageous
note to locate detectors where they are accessible for
The gas detector housing must be electrically maintenance. Locations near excessive heat or
connected to earth ground. A dedicated earth vibration sources should be avoided if possible.
ground wire is provided on the transmitter for
connection to earth ground or to a grounded Final suitability of possible gas detector locations
housing. should be verified by a site survey. If any questions
arise regarding installation, please contact the factory.
The detector must always be installed per local
installation code.
Device Mounting Orientation
Before installing the gas detector, define the following The gas detector must be mounted in a vertical position
application details: only, with the sensor pointing down (See Figure 5).

Identification of vapor(s) to be detected Important

It is necessary to always identify the vapor(s) of interest The sensor should be oriented with the LEDs
at the job site. In addition, the fire hazard properties facing forward so they are easily visible to
of the vapor, such as vapor density, flashpoint, and personnel within the area. To ensure correct
vapor pressure should be identified and used to assist orientation (the LEDs are not visible when power
in selecting the optimum detector mounting location is off), position the GND lug on the left hand side
within the area. and the calibration notch to the front. Note that the
LEDs are located directly above the calibration
notch.
Identification of detector mounting
locations
Identification of the most likely leak sources and
leak accumulation areas is typically the first step in
identifying the best detector mounting locations. In
addition, identification of air current/wind patterns
within the protected area is useful in predicting gas leak
dispersion behavior. This information should be used
to identify optimum sensor installation points.

If the vapor of interest is lighter than air, place the sensor

above the potential gas leak. Place the sensor close to
the floor for gases that are heavier than air. Note that air
currents may cause a gas that is slightly heavier than GND LUG
air to rise under some conditions. Heated gases may
also exhibit the same phenomenon.
GREEN LED

CALIBRATION NOTCH

B2436

Figure 5—Correct Mounting Orientation for the GT3000

11.1 6 95-8616
Detector installation SENSOR termination box
A Det-Tronics sensor termination box (Model STB)
3/4" NPT Models
is required for installing the sensor in a stand alone
3/4" NPT models have Tapered Threads and no Lock configuration, or for installing the GT3000 remotely
Nut. Install the sensor as follows: from the UD10/UD20 Universal Display Unit.

1. Screw the detector into the appropriate entry on When installing the GT3000 remotely from a UD10/
the termination box. Ensure a minimum of 5 fully UD20, two‑conductor shielded cable is required to
engaged threads. Use of teflon tape on NPT threads prevent possible nuisance EMI/RFI. The maximum
is recommended to prevent thread damage. cable length between the GT3000 and the UD10/UD20
is 2000 ft.
2. When the detector gets tight, note the position of the
LEDs, GND lug and calibration notch and adjust the
detector as required so that the LEDs will be easily WIRING
visible.
power SUPPLY requirements
M25 Models
Calculate the total gas detection system power
M25 models have Straight Threads and a Lock Nut. consumption rate in watts from cold start-up. Select a
Install the detector as follows: power supply with adequate capability for the calculated
load. Ensure that the selected power supply provides
1. Screw the detector lock nut as far back as it will go, sufficient regulated and filtered output power for the
then screw the detector into the appropriate entry entire system. If a back-up power system is required, a
on the termination box. Ensure a minimum of 7 fully float‑type battery charging system is recommended. If
engaged threads. an existing source of power is being utilized, verify that
system requirements are met.
2. With the detector in the desired position (LEDs
visible as shown in Figure 5), tighten the lock nut note
against the termination box to hold the detector The power supply must also meet the noise
securely in place. requirements for HART systems.

3. Tighten the set screws (minimum of two) to prevent

Wiring cable requirements
movement of the lock nut. See Figure 6.
Always use proper cabling type and diameter for input
power as well as output signal wiring. 22 to 14 AWG
shielded stranded copper wire is recommended.

Always install a properly sized, master power fuse or

breaker on the system power circuit.

note
The use of shielded cable in conduit or shielded
armored cable is highly recommended. In
applications where the wiring is installed in
conduit, dedicated conduit is recommended.
Avoid low frequency, high voltage, and
non‑signaling conductors to prevent nuisance
EMI problems.
Set Screws
caution
The use of proper conduit installation techniques,
Figure 6—Location of Lock Nut and Set Screws breathers, glands, and seals is required to prevent
(Metric Models Only) water ingress and/or maintain the explosion-proof
rating.

11.1 7 95-8616
Intrinsic SafeTy Barriers Guidelines for Intrinsic Safety Wiring
When the GT3000 is used in an intrinsically safe Intrinsically safe systems must be installed in
installation, care must be taken when selecting an I.S. accordance with the approved control drawings for
barrier to ensure proper function of the device. The the field equipment and the intrinsic safety barriers.
GT3000 has been tested with the types of barriers listed Capacitance and inductance of interconnecting wiring
must always be included in wiring calculations.
in Tables 3 and 4.
Shielded twisted pair cables with at least 18 AWG
Table 3 lists zener barriers. The third column gives the conductors are recommended to ensure circuit
range of input voltage to the barrier. The upper limit is performance.
set by the barrier. The lower limit is limited by voltage
drops in the 4-20 mA loop with a maximum of 10 Ohms The intrinsically safe conductors must be separated
of resistance in each leg of the loop. from all other wiring by placing them in separate
conduits or raceways, or by an airspace of at least 2
Table 4 lists isolating barriers that provide a wider range inches (50 mm). When located within an enclosure, the
of input power supply voltages and are less dependent conductors can be separated by a grounded metal or
on voltage drops in the loop. Input voltage to the barrier insulated partition. Wires must be tied down to prevent
loosening and/or shorting.
is specified by the barrier manufacturer.
Intrinsically safe wiring must be identified. Raceways,
For additional information regarding proper IS cable trays, open wiring, and terminal boxes must be
installation, refer to the Control Drawings in Appendix labeled as Intrinsically Safe. Intrinsically safe wiring
H of this manual. may be light blue in color when no other conductors
colored light blue are used.

Wiring enclosures should be located as close as

possible to the hazardous area to minimize cable runs
and reduce total capacitance of the wiring.

A high quality intrinsic safety ground is required. Some

Table 3—Acceptable Intrinsic Safety Barriers
general rules for grounding intrinsically safe systems are:
for use with GT3000 – Zener Barriers • The maximum impedance of the grounding
conductor between the barrier ground terminal and
Manufacturer P/N
the main ground point must be less than 1 ohm.
Turck MZB87PX
• The grounding conductor must be a minimum of 12
MTL MTL7787P+ AWG.
Pepperl & Fuchs Z787.h • Redundant grounding conductors are recommended
to facilitate testing of the ground connection.
• The grounding conductor should be insulated and
protected from the possibility of mechanical damage.

Wiring Procedure
Table 4—Acceptable Intrinsic Safety Barriers
for use with GT3000 – Isolating Barriers Wire the transmitter as shown in Figures 7 through 12.
Manufacturer P/N
Caution
Turck IM33-11Ex-Hi If ripple on the main power source causes
MTL 5541 interference with the HART function, the use
of an isolated power source (Figure 12) is
Pepperl & Fuchs KCD2-STC-Ex1
recommended for best HART performance.
Stahl 9160/13-10-11

11.1 8 95-8616
 SENSOR TERMINATION BOX

GREEN
+
RED
24 VDC
BLACK

D
–

RE

K
SEE NOTES 2 & 3

AC
BL
SEE NOTE 1

RED
BLACK

NOTE 1 GROUND THE SHIELD AT THE POWER SOURCE

END ONLY.

NOTE 2 250 OHM RESISTOR REQUIRED FOR HART

MENU ACCESS.

NOTE 3 EXTERNAL HART COMMUNICATION DEVICES

CAN BE CONNECTED ACROSS THE 250 OHM
GT3000 RESISTOR OR ACROSS THE GT3000.
GAS DETECTOR
NOTE 4 JUNCTION BOX MUST BE ELECTRICALLY
A2502
CONNECTED TO EARTH GROUND.

Figure 7—GT3000 Wired to Sensor Termination Box in Stand-Alone Configuration (Explosion-Proof)

HAZARDOUS LOCATION NON-HAZARDOUS LOCATION

SENSOR TERMINATION BOX

+
INTRINSIC

BARRIER

GREEN
SAFETY

RED
24 VDC
BLACK
D

–
RE

SEE NOTES 2 & 3

AC
BL

SEE NOTE 1
RED

BLACK

NOTE 1 GROUND THE SHIELD AT THE POWER SOURCE

END ONLY.

NOTE 2 250 OHM RESISTOR REQUIRED FOR HART

MENU ACCESS.

NOTE 3 EXTERNAL HART COMMUNICATION DEVICES

CAN BE CONNECTED ACROSS THE 250 OHM
GT3000 RESISTOR OR ACROSS THE GT3000.
GAS DETECTOR
NOTE 4 JUNCTION BOX MUST BE ELECTRICALLY
A2530
CONNECTED TO EARTH GROUND.

Figure 8— GT3000 Wired to Sensor Termination Box in Stand-Alone Configuration (Intrinsically Safe)

11.1 9 95-8616
 UD20 DISPLAY UNIT
+ J2-6 +
SEE NOTES 2 & 3 24 VDC
POWER – J2-5 –
LOOP

SHIELD J2-4
SEE NOTE 5

RED +
J2-3

BLACK SENSOR
J2-2 – LOOP
GREEN SEE NOTE 1
J2-1 SHIELD

J2

NOTE 1 CONNECT THE GREEN DETECTOR LEAD TO THE

CHASSIS GROUND LUG ON THE INSIDE BOTTOM
OF THE UD20 DISPLAY UNIT ENCLOSURE.

NOTE 2 250 OHM RESISTOR REQUIRED FOR HART

MENU ACCESS.
GT3000
GAS DETECTOR NOTE 3 EXTERNAL HART COMMUNICATION DEVICES CAN BE
CONNECTED ACROSS THE 250 OHM RESISTOR,
ACROSS J2-5 AND J2-6, OR ACROSS J2-2 AND J2-3.

NOTE 4 JUNCTION BOX MUST BE ELECTRICALLY

CONNECTED TO EARTH GROUND.

NOTE 5 GROUND THE SHIELD AT THE POWER SOURCE

END ONLY. B2478

Figure 9—GT3000 Wired Directly to UD20 Display Unit (Explosion-Proof)

UD20 DISPLAY UNIT

+ J2-6 +
24 VDC
POWER – J2-5 –
LOOP SEE NOTES 2 & 3
SENSOR TERMINATION BOX
SHIELD J2-4
SEE NOTE 1 SEE NOTE 1

GREEN J2-3 +
RED
BLACK
SENSOR
D

–
RE

J2-2
LOOP
K
AC
BL

J2-1 SHIELD
RED

BLACK
J2

NOTE 1 GROUND THE SHIELD AT THE POWER SOURCE

END ONLY.

NOTE 2 250 OHM RESISTOR REQUIRED FOR HART

MENU ACCESS.

NOTE 3 EXTERNAL HART COMMUNICATION DEVICES CAN BE

CONNECTED ACROSS THE 250 OHM RESISTOR,
GT3000 ACROSS J2-5 AND J2-6, OR ACROSS J2-2 AND J2-3.
GAS DETECTOR
NOTE 4 JUNCTION BOXES MUST BE ELECTRICALLY
CONNECTED TO EARTH GROUND. D2408

Figure 10—GT3000 with Sensor Termination Box Wired to UD20 Display Unit (Explosion-Proof)

11.1 10 95-8616
 NON-HAZARDOUS LOCATION HAZARDOUS LOCATION

BLACK

RED

UD10
DISPLAY UNIT GREEN
Sensor Connector

J3-1

J3-2

J3-3

J3-4

J3-5
J3

CALIBRATE

24 VDC –
SHIELD

24 VDC +
4-20 mA
Output Loop SEE NOTE 1
Connector
HIGH ALARM COM J4-1
P1-3 4-20 mA +
HIGH ALARM NC J4-2

P1-2 4-20 mA – HIGH ALARM NO J4-3

PLC 4-20 mA INPUT CARD AUX ALARM COM J4-4

Relay Connector
P1-1 SHIELD
AUX ALARM NC J4-5
P1
AUX ALARM NO J4-6

LOW ALARM COM J4-7

J2
GT3000
LOW ALARM NC J4-8
COM
INPUT J2-3
LOW ALARM NO J4-9 GAS DETECTOR
J2-2 RS485 A FAULT COM J4-10
4-20 mA
FAULT NC J4-11
J2-1 RS485 B
– FAULT NO J4-12

24 VDC –
24 VDC –

24 VDC +
24 VDC +
250 24 VDC MODBUS

SHIELD

SHIELD
J4
OHMS + Connector
MINIMUM

P2-6

P2-5

P2-4

P2-3

P2-2

P2-1
P2
P12
Power Supply Connector

Notes: Resistor may be external if voltage input card is used. NOTE 1 CONNECT THE GREEN DETECTOR LEAD
Sinking resistance at PLC must be 250 ohms minimum TO THE CHASSIS GROUND LUG ON THE
INSIDE BOTTOM OF THE DISPLAY UNIT
for HART communication.
ENCLOSURE.

NOTE 2 JUNCTION BOXES MUST BE ELECTRICALLY

C2453 CONNECTED TO EARTH GROUND.

Figure 11—GT3000 Wired Directly to the UD10 Display Unit / UD10 Wired to PLC with 4-20 mA Non-Isolated Sourcing Output

NON-HAZARDOUS LOCATION HAZARDOUS LOCATION

BLACK

RED

UD10
DISPLAY UNIT GREEN
Sensor Connector
J3-1

J3-2

J3-3

J3-4

J3-5

J3
CALIBRATE

24 VDC –
SHIELD

24 VDC +
4-20 mA

Output Loop SEE NOTE 1

Connector
HIGH ALARM COM J4-1
P1-3 4-20 mA +
HIGH ALARM NC J4-2

P1-2 4-20 mA – HIGH ALARM NO J4-3

PLC 4-20 mA INPUT CARD AUX ALARM COM J4-4

Relay Connector

P1-1 SHIELD
AUX ALARM NC J4-5
P1
AUX ALARM NO J4-6

LOW ALARM COM J4-7

J2
GT3000
LOW ALARM NC J4-8
COM
INPUT J2-3
LOW ALARM NO J4-9 GAS DETECTOR
J2-2 RS485 A FAULT COM J4-10
4-20 mA
FAULT NC J4-11
J2-1 RS485 B
– FAULT NO J4-12
24 VDC –
24 VDC –

24 VDC +
24 VDC +

250 24 VDC MODBUS

SHIELD

SHIELD

J4
OHMS + Connector
MINIMUM
P2-6

P2-5

P2-4

P2-3

P2-2

P2-1

P2
P12
Power Supply Connector NOTE 1 CONNECT THE GREEN DETECTOR
LEAD TO THE CHASSIS GROUND
LUG ON THE INSIDE BOTTOM OF
Notes: Resistor may be external if voltage input card is used. THE DISPLAY UNIT ENCLOSURE.
Sinking resistance at PLC must be 250 ohms minimum
for HART communication. – NOTE 2 JUNCTION BOXES MUST BE
24 VDC ELECTRICALLY CONNECTED
C2479 +
TO EARTH GROUND.

Figure 12—GT3000 Wired Directly to the UD10 Display Unit / UD10 Wired to PLC with 4-20 mA Isolated Sourcing Output

11.1 11 95-8616
Calibration The calibration process proceeds automatically after
initiation. Onboard LEDs signal the operator when to
GT3000 Calibration apply the calibration gas and inform of the progress.
The GT3000 supports one person calibration, which The calibration can be aborted by activating the
can be initiated locally using a calibration magnet, or magnetic switch or with a command from the HART
remotely with a command from the HART interface. communication device in lieu of applying the calibration
The calibration process is automatic, with the exception gas.
of gas delivery. LEDs on the transmitter guide the
operator when to apply and remove the calibration gas If the calibration process takes longer than 10 minutes,
See Table 5. the detector will time-out and signal a calibration fault.

note If the calibration sequence is aborted or not completed

The HART interface allows the operator to adjust successfully, the detector reverts back to the previous
the calibration gas concentration within the range calibration values and signals a calibration fault. The
of 30 to 90% full scale. The default value for all calibration fault can be cleared by activating the
gas sensors except oxygen is 50% full scale. magnetic switch for one second or by performing a
Oxygen sensors use a default value of 20.9%. successful calibration.

All GT3000 gas detectors require a two-point The calibration process can fail for the following
calibration — zero and span. The calibration process causes:
can be initiated using the magnetic switch or through a • Zero is out of range
HART interface, such as the UD10/UD20. All sensors,
• Span is out of range
including oxygen, should be in clean air (20.9% oxygen)
when the calibration sequence is initiated. • Time-Out.

The time and date of calibration events are logged in

non‑volatile memory along with the calibration outcome.
Possible calibration scenarios include the following:
Table 5— LEDs During Calibration • Successful Calibration
Calibration Step Yellow LED • Aborted Calibration
• Failed Calibration and the Cause
Waiting for Zero Steady
The Sensor Module stores calibration data in non‑volatile
Waiting for Gas Blinking memory to allow the sensor to be calibrated off‑site and
Waiting for Span Blinking installed in the field without the need for re‑calibration.

Remove Cal Gas Off

11.1 12 95-8616
Calibration Procedure NOTE
The calibration procedure must be completed
note
within a ten minute period. If the calibration is not
When attaching or removing the calibration cup,
completed, a calibration fault will be generated
push or pull the cup with a slight clockwise twist.
and the transmitter will continue to use the
Turning counterclockwise can cause the filter
previous calibration data.
assembly on the GT3000 to loosen. If the filter
assembly is inadvertently loosened, tighten it by
NOTE
hand (no tools required).
To ensure reliable detection performance,
calibration should be performed at regularly
Toxic and Hydrogen Sensors scheduled intervals. Various factors affect
the time interval between periodic calibrations
1. Clean air must be present at the GT3000 sensor (typically 30, 60, or 90 day intervals, depending
module prior to initiating calibration. The use of on the ambient conditions).
bottled air is recommended.
note
2. Initiate calibration by momentarily holding the Calibration of ammonia sensor is recommended
calibration magnet against the designated location any time the sensor has been exposed to 90 ppm
on the sensor module (see Figure 13) until the ammonia.
green LED turns off and the yellow LED turns on
steady (approximately one second). Remove
the magnet when the green LED turns off. The Oxygen Sensor
detector immediately begins taking zero readings. 1. Using the magnet, activate the magnetic calibration
Calibration can also be initiated via HART interface switch on the GT3000. The green LED turns off and
(see Appendix G) or the UD10 (see manual number the yellow LED turns on steady.
95-8618).
2. The device automatically performs the zero
3. When the zero calibration is complete, the yellow calibration.
LED changes from steady to blinking. Apply the
calibration gas to the sensor. 3. When the yellow LED on the GT3000 flashes, the
device automatically performs the span calculation.
4. When the yellow LED turns off, remove the calibration If using bottled 20.9% oxygen, apply immediately.
gas. The gas level at the sensor gradually returns to
zero. The green LED turns on steady to indicate that 4. After successful calibration, the yellow LED turns off
the device has returned to normal operation, using and the green LED turns on steady to indicate that
the new calibration data. the device has returned to normal operation, using
the new calibration data. Remove calibration gas (if
used).

LED

PLACE MAGNET HERE

TO ACTIVATE INTERNAL
MAGNETIC SWITCH

B2452

Figure 13—Location of Magnetic Switch on GT3000 Detector

11.1 13 95-8616
Maintenance Important
Always exercise caution when working in
note combustible gas areas. Follow replacement
Refer to the GT3000 Safety Manual (number instructions explicitly.
9 5 - 8 6 8 5 ) fo r s p e c i fi c re q u i re m e n t s a n d
recommendations applicable to the proper note
installation, operation, and maintenance of all Removing the sensor module with power applied
SIL‑Certified GT3000 gas detectors. will result in a fault condition until a new sensor
module of the same type is installed. When
replacing an oxygen sensor, this action will result
Routine Inspection
in an alarm condition as the decreasing 4-20 mA
The gas inlet to the sensor should be inspected signal passes through the alarm range. Inhibit
periodically, or during scheduled maintenance, to response devices to prevent unwanted actuation.
ensure that external obstructions such as plastic bags,
litter, heavy oil and tar, paint, mud, snow, or other NOTE
materials do not block the flow of gas to the sensor, Oxygen (O2) electrochemical sensors contain
thereby impairing the performance of the device. lead (Pb). Observe all local waste management
requirements when disposing of exhausted O2
To replace a dirty or damaged filter, simply grasp the electrochemical sensors.
filter assembly and twist counterclockwise to remove.
Screw the new filter in place on the sensor module. Do note
not overtighten. See Figure 14. Electrochemical sensors are highly sensitive to
antiseptic wipes and/or cleaning products that
To ensure reliable protection, it is important to check and contain alcohol and antibacterial/antiviral agents.
calibrate the detection system on a regularly scheduled Antiseptic products should be removed from
basis. The frequency of these checks is determined by areas where sensors are stored, handled, or
the requirements of the particular installation – typically used. If antiseptic products are being used on
30, 60, or 90 day intervals, depending on the ambient workers' hands, sufficient time should be allowed
conditions. for the alcohol to evaporate before handling
sensors.
Sensor module replacement
(Live Maintenance)
The hot swappable, intrinsically safe sensor module
can be replaced in the field without removing power or
de‑classifying the hazardous area.

To replace the sensor module, locate the three captive

screws on the front of the module as shown in Figure
15. Loosen these screws and remove the old sensor
module. Install the new sensor module onto the
transmitter, and tighten the screws. To ensure proper
moisture ingress protection and grounding of the plastic
nosepiece, tighten the screws to 70-100 oz-in (0.5-0.7
N-m).

TURN FILTER COUNTERCLOCKWISE

TO REMOVE. NO TOOLS REQUIRED.

LOOSEN CAPTIVE PHILLIPS

SCREWS (3) TO REMOVE
SENSOR MODULE.

A2481 B2451

Figure 14—GT3000 with Replaceable Filter Removed Figure 15—Location of Screws for Sensor Module Replacement

11.1 14 95-8616
DEVICE REPAIR AND RETURN Calibration Kits for Gas Sensors
Part Number Gas / Concentration
Prior to returning devices, contact the nearest local
010274-001 H2S / 10 ppm
Detector Electronics office so that a Return Material
010274-002 H2S / 25 ppm
Identification (RMI) number can be assigned. A
010274-003 H2S / 50 ppm
written statement describing the malfunction must
010274-008 H2 / 500 ppm
accompany the returned device or component to
010274-009 O2 / 20.9%
assist and expedite finding the root cause of the
010274-010 CO / 50 ppm
failure.
010274-011 CO / 250 ppm
010274-005 NH3 / 50 ppm
Pack the unit properly. Always use sufficient packing
010274-006 NH3 / 250 ppm
material. Where applicable, use an antistatic bag as
010274-013 SO2 / 10 ppm
protection from electrostatic discharge.
010274-014 SO2 / 50 ppm
010274-004 Cl2 / 5 ppm
note
010274-016 NO2 / 10 ppm
Inadequate packaging that ultimately causes
damage to the returned device during shipment Replacement gas cylinders for all calibration kits are
will result in a service charge to repair the damage available.
incurred during shipment.
Parts & Accessories
Return all equipment transportation prepaid to the
factory in Minneapolis. Part Number Description
009700-001 Magnetic Tool
NOTE 009737-001 Calibration Cup
It is highly recommended that a complete spare 107427-059 Calibration Cup O-ring
be kept on hand for field replacement to ensure 101678-007 3 Foot Tubing
continuous protection. 162552-001 Regulator, 1 LPM
009640-001 Replacement Filter
ORDERING INFORMATION 012509-001 Q312 Sample Draw without Fittings
012509-002 Q312 Sample Draw with Fittings
Sensor module (GTS) and transmitter (GTX) must be 010780-003 GT3000 Remote Calibration Adaptor
ordered separately. Refer to the Transmitter and Sensor 010783-001 GT3000 Remote Calibration Filter
Model Matrix on next page for ordering details. 012513-XXX* Q912 Duct Mount Enclosure, M25
012514-XXX* Q912 Duct Mount Enclosure, 3/4"

GTS Gas Sensors *Refer to the Product Catalog for a list of options.

Gas Concentration
Hydrogen Sulfide (H2S) 0-20 ppm Assistance
Hydrogen Sulfide (H2S) 0-50 ppm For assistance in ordering a system to meet the needs
of a specific application, contact:
Hydrogen Sulfide (H2S) 0-100 ppm
Oxygen (O2)* 0-25% V/V Detector Electronics Corporation
Carbon Monoxide (CO) 0-100 ppm 6901 West 110th Street
Carbon Monoxide (CO) 0-500 ppm Minneapolis, Minnesota 55438 USA
Operator: (952) 941-5665 or (800) 765-FIRE
Ammonia (NH3) 0-100, or 0-500 ppm
Customer Service: (952) 946-6491
Sulfur Dioxide (SO2) 0-20 ppm Fax: (952) 829-8750
Sulfur Dioxide (SO2) 0-100 ppm Web site: www.det-tronics.com
Chlorine (Cl2) 0-10 ppm E-mail: det-tronics@det-tronics.com
Hydrogen (H2) 0-1000 ppm
Nitrogen Dioxide (NO2) 0-20 ppm

*Oxygen detector for O2 depletion (< 21% V/V) only.

11.1 15 95-8616
GTS Sensor Model Matrix
MODEL DESCRIPTION
GTS Gas Sensor Module
TYPE GAS / RANGE
H2S Hydrogen Sulfide
20P 0 - 20 PPM
50P 0 - 50 PPM
100P 0 - 100 PPM
H2S+ Hydrogen Sulfide
20P 0 - 20 PPM
50P 0 - 50 PPM
100P 0 - 100 PPM
CL2 Chlorine
10P 0 - 10 PPM
NH3 Ammonia
100P 0 - 100 PPM
500P 0 - 500 PPM
H2 Hydrogen
1000P 0 - 1000 PPM
O2 Oxygen
25V 0 - 25 % by Vol
CO Carbon Monoxide
100P 0 - 100 PPM
500P 0 - 500 PPM
SO2+ Sulfur Dioxide
20P 0 - 20 PPM
100P 0 - 100 PPM
NO2 Nitrogen Dioxide
20P 0 - 20 PPM
TYPE APPROVAL*
B INMETRO (Brazil)
C CSA
D DNV
R Russia
S SIL
T SIL/FM/CSA/ATEX/CE/IECEx
W FM/CSA/ATEX/CE/IECEx

* Type Approval can use one or more letters to

designate the Approvals on the product.

11.1 16 95-8616
GTX Transmitter Model Matrix
MODEL DESCRIPTION
GTX Gas Transmitter
TYPE MATERIAL
S Stainless Steel (316)
TYPE THREAD SIZE
N 3/4" NPT
M Metric M25
TYPE OUTPUTS
26 4-20 mA, HART (3.5 mA FAULT)
29 4-20 mA, HART (2.45 mA FAULT)
TYPE APPROVALS
B INMETRO (Brazil)
R Russia
W FM/CSA/ATEX/CE/IECEx
TYPE CLASSIFICATION (Division/Zone)
4 Intrinsically Safe
5 Explosion-Proof

Note: Approvals Type W and B are SIL 2 Capable when used with an H2S or O2 GTS sensor module.

11.1 17 95-8616
 Appendix A
FM Approval Description

The following items, functions and options describe the FM approval.

Approval
Electrochemical Gas Detector, GT3000 Series.

Explosion Proof Model

Class I, Div. 1, Groups A, B, C, & D (T4).
Class I, Div. 2, Groups A, B, C, & D (T4).
Class I, Zone 1, AEx d mb [ia Ga] IIC T4.
IP66.
Conduit seal not required.
Acidic atmospheres excluded.

note
The GTX Gas Transmitter module shall be connected directly to a junction box suitable for the area of
installation to provide protection for the flying leads.

Intrinsically Safe Model

IS Class I, Div. 1, Groups A, B, C, & D (T4).
Class I, Zone 0, AEx ia IIC (T4).
IP66.

NOTE
In order to maintain the intrinsically safe rating of the transmitter, the device must be powered through an
approved I.S. barrier.

For a list of recommended barrier models, refer to Tables 3 and 4. For additional information regarding
proper I.S. installation, refer to the Control Drawings in Appendix H of this manual.

Performance verified per ANSI/ISA 92.00.01, FM6340/41 and EN50104.

11.1 18 95-8616
Approved Accessories

Part Number Description

010274-001 Gas Calibration Kit, 10 ppm H2S
010274-002 Gas Calibration Kit, 25 ppm H2S
010274-003 Gas Calibration Kit, 50 ppm H2S
010274-008 Gas Calibration Kit, 500 ppm H2
010274-009 Gas Calibration Kit, 20.9% O2
010274-010 Gas Calibration Kit, 50 ppm CO
010274-011 Gas Calibration Kit, 250 ppm CO
010274-005 Gas Calibration Kit, 50 ppm NH3
010274-006 Gas Calibration Kit, 250 ppm NH3
010274-013 Gas Calibration Kit, 10 ppm SO2
010274-014 Gas Calibration Kit, 50 ppm SO2
010274-004 Gas Calibration Kit, 5 ppm Cl2
010274-016 Gas Calibration Kit, 10 ppm NO2
009700-001 Magnetic Tool
009737-001 Calibration Cup
107427-059 Calibration Cup O-ring
101678-007 3 Foot Tubing
162552-001 Regulator, 1 LPM
009640-001 Replaceable Filter

11.1 19 95-8616
 Appendix B
CSA certification Description

The following items, functions and options describe the CSA approval.

Approval
Electrochemical Gas Detector, GT3000 Series.

Explosion Proof Model

Class I, Div. 1, Groups A, B, C, & D (T4).
Class I, Div. 2, Groups A, B, C, & D (T4).
Class I, Zone 1, AEx d mb [ia Ga] IIC T4.
IP66.
Conduit seal not required.
Acidic atmospheres excluded.

note
The GTX Gas Transmitter module shall be connected directly to a junction box suitable for the area of
installation to provide protection for the flying leads.

Intrinsically Safe Model

Class I, Div. 1 & 2, Groups A, B, C, & D (T4).
IP66.

NOTE
In order to maintain the intrinsically safe rating of the transmitter, the device must be powered through an
approved I.S. barrier.

For a list of recommended barrier models, refer to Tables 3 and 4. For additional information regarding
proper I.S. installation, refer to the Control Drawings in Appendix H of this manual.

11.1 20 95-8616
 Appendix C
ATEX Approval Description

The following items, functions and options describe the ATEX approval.

Approval
Electrochemical Gas Detector, GT3000 Series.

Explosion Proof Model

0539
FM
APPROVEDII 2(1)G.
®

Ex d mb [ia Ga] IIC T4 Gb IP66.

FM10ATEX0009X.

note
The GTX Gas Transmitter module shall be connected directly to a junction box suitable for the area of
installation to provide protection for the flying leads.

Intrinsically Safe Model

0539
FM
II 1 G Ex ia IIC T4 Ga IP66.
APPROVED
®

FM08ATEX0045X.

NOTE
In order to maintain the intrinsically safe rating of the transmitter, the device must be powered through an
approved I.S. barrier.

For a list of recommended barrier models, refer to Tables 3 and 4. For additional information regarding
proper I.S. installation, refer to the Control Drawings in Appendix H of this manual.

11.1 21 95-8616
 Appendix D
IECEx Approval Description

The following items, functions and options describe the IECEx approval.

Approval
Electrochemical Gas Detector, GT3000 Series.

Explosion Proof Model

Ex d mb [ia Ga] IIC T4 Gb IP66.
IECEx FMG 10.0003X.

note
The GTX Gas Transmitter module shall be connected directly to a junction box suitable for the area of
installation to provide protection for the flying leads.

Intrinsically Safe Model

Ex ia IIC T4 Ga IP66.
IECEx FMG 08.0005X.

NOTE
In order to maintain the intrinsically safe rating of the transmitter, the device must be powered through an
approved I.S. barrier.

For a list of recommended barrier models, refer to Tables 3 and 4. For additional information regarding
proper I.S. installation, refer to the Control Drawings in Appendix H of this manual.

11.1 22 95-8616
 Appendix E
Other Approvals

The following items, functions and options describe various other approvals applicable to the GT3000.

SIL Approval
IEC 61508
Certified SIL 2 Capable.
SIL Certification includes H2S and O2 GTS models only. For specific information regarding SIL models, refer to the
GT3000 Safety Reference Manual, form 95-8685.

INMetro (Brazil)

Explosion Proof Model

UL-BR 15.0752X
Ex d mb [ia Ga] IIC T4 Gb IP66
Tamb –40°C to +50°C (H2S)
Tamb –20°C to +50°C (other)

note
The GTX Gas Transmitter module shall be connected directly to a junction box suitable for the area of
installation to provide protection for the flying leads.

NOTE
Consideration must be given to overall Gas System Performance Requirements.

Intrinsically Safe Model

UL-BR 15.0404X
Ex ia IIC T4 Ga IP66
Tamb –40°C to +50°C

NOTE
In order to maintain the intrinsically safe rating of the transmitter, the device must be powered through an
approved I.S. barrier.

For a list of recommended barrier models, refer to Tables 3 and 4. For additional information regarding
proper I.S. installation, refer to the Control Drawings in Appendix H of this manual.

DNV
Type Approval Certificate No. A-12358.

MED
Certificate No. MED-B-6708.

Russia / Kazakhstan / India

Contact Det-Tronics for details.

11.1 23 95-8616
 Appendix F
declaration of conformity

For a copy of the original document, please contact the factory.

11.1 24 95-8616
 Appendix G

Sensor comparison/Cross Sensitivity

Electrochemical Gas Sensors

Accuracy of
Response Reading Operating Performance
Gas Range Zero Drift
Time1 (Whichever Temperature Range Approved Standard
is Greater)
T20 = ≤7 Sec
Hydrogen Sulfide ±2 ppm or
0-20 PPM T50 = ≤10 Sec. –40°C to +50°C ± 1 ppm/Mo. ISA 92.00.014
(H2S) ±10% of Reading
T90 = ≤16 Sec.
T20 = ≤4 Sec
Hydrogen Sulfide ±2 ppm or
0-50 PPM T50 = ≤7 Sec. –40°C to +50°C ± 1 ppm/Mo. ISA 92.00.014
(H2S) ±10% of Reading
T90 = ≤16 Sec.
T20 = ≤5 Sec
Hydrogen Sulfide ±2 ppm or
0-100 PPM T50 = ≤8 Sec. –40°C to +50°C ± 2 ppm/Mo. ISA 92.00.014
(H2S) ±10% of Reading
T90 = ≤21 Sec.
T20 = ≤10 Sec
Hydrogen Sulfide+ ±2 ppm or
0-20 PPM T50 = ≤13 Sec. –40°C to +55°C ± 1 ppm/Mo. ISA 92.00.014
(H2S+) ±10% of Reading
T90 = ≤23 Sec.
T20 = ≤6 Sec
Hydrogen Sulfide+ ±2 ppm or
0-50 PPM T50 = ≤9 Sec. –40°C to +55°C ± 1 ppm/Mo. ISA 92.00.014
(H2S+) ±10% of Reading
T90 = ≤15 Sec.
T20 = ≤6 Sec
Hydrogen Sulfide+ ±2 ppm or
0-100 PPM T50 = ≤8 Sec. –40°C to +55°C ± 2 ppm/Mo. ISA 92.00.014
(H2S+) ±10% of Reading
T90 = ≤15 Sec.
T50 = 24 Sec. ±4 ppm or
Ammonia (NH3) 0-100 PPM2 –20°C to +40°C ± 2 ppm/Mo. FM63404
T90 = 65 Sec. ±10% of Reading
T50 = 30 Sec. ±4 ppm or Det-Tronics Verified
Ammonia (NH3) 0-500 PPM2 –20°C to +40°C ± 10 ppm/Mo.
T90 = 120 Sec. ±10% of Reading (CSA Exd)
T20 = 7 Sec.
Oxygen (O2) 0-25% V/V3 < 0.5% V/V –20°C to +50°C < 2 %/Mo. BS EN 501044
T90 = 30 Sec.
Carbon T50 = 15 Sec. ±5 ppm or
0-100 PPM –20°C to +50°C ± 2 ppm/Mo. ISA 92.00.014
Monoxide (CO) T90 = 40 Sec. ±10% of Reading
Carbon T50 = 12 Sec. ±5 ppm or
0-500 PPM –20°C to +50°C ± 9 ppm/Mo. ISA 92.00.014
Monoxide (CO) T90 = 25 Sec. ±10% of Reading
Sulfur Dioxide+ T50 = 12 Sec. ±0.6 ppm or Det-Tronics Verified
0-20 PPM –40°C to +55°C ± 0.4 ppm/Mo.
(SO2+) T90 = 30 Sec. ±10% of Reading (CSA Exd)
Sulfur Dioxide+ T50 = 15 Sec. ±0.6 ppm or Det-Tronics Verified
0-100 PPM –40°C to +55°C ± 0.4 ppm/Mo.
(SO2+) T90 = 35 Sec. ±10% of Reading (CSA Exd)
Chlorine T50 = ≤14 Sec. ±0.6 ppm or
0-10 PPM –20°C to +50°C < 0.2 ppm/Mo. FM63404
(Cl2) T90 = ≤34 Sec. ±10% of Reading
Hydrogen T50 = 8 Sec. ±50 ppm or Det-Tronics Verified
0-1,000 PPM –20°C to +40°C ± 20 ppm/Mo.
(H2) T90 = 60 Sec. ±10% of Reading (CSA Exd)
Nitrogen Dioxide T50 = 7 Sec. ±2 ppm or Det-Tronics Verified
0-20 PPM –20°C to +40°C ± 0.1 ppm/Mo.
(NO2) T90 = 31 Sec. ±10% of Reading (CSA Exd)
1 Time to reach percentage of final reading when gas concentration equal to full scale is applied to sensor.
2 Background concentrations of ammonia may shorten lifetime of sensor.
3 Sensor approved for oxygen depletion (< 21% V/V) only.
4 Factory Mutual Performance Approved.

11.1 25 95-8616
 Typical Cross Sensitivity of H2S Sensor (0-20 ppm / 0-50 ppm / 0-100 ppm)

Reading
Gas Concentration
H2S H2S+
Carbon monoxide 300 ppm ≤ 2 ppm ≤ 2 ppm
Sulfur dioxide 5 ppm ~ 1 ppm ~ 0 ppm
Nitric oxide 35 ppm < 0.7 ppm ~ 0 ppm
Hydrogen 10000 ppm ≤ 10 ppm
Ammonia 50 ppm ~ 0 ppm
Nitrogen dioxide 5 ppm ~ –1 ppm ~ 0 ppm
Methanol 200 ppm ~ 0 ppm ~ 0 ppm

Typical Cross Sensitivity of NH3 Sensor (0-100 ppm) Typical Cross Sensitivity of NH3 Sensor (0-500 ppm)

Gas Concentration Reading Gas Concentration Reading

Alcohols 1000 ppm 0 ppm Alcohols 1000 ppm 0 ppm
Carbon dioxide 5000 ppm 0 ppm Carbon monoxide 100 ppm 0 ppm
Carbon monoxide 100 ppm 0 ppm Chlorine 5 ppm 0 ppm
Hydrocarbons % Range 0 ppm Nitrogen dioxide 10 ppm 0 ppm
Hydrogen 10000 ppm 0 ppm Sulfur dioxide 20 ppm –40 ppm
Hydrogen sulfide 20 ppm ~ 2 ppm1 Hydrogen 3000 ppm 0 ppm
1 Short time gas exposure in minute range. Hydrogen sulfide 20 ppm 2 ppm

Typical Cross Sensitivity of CO Sensor (0-100 ppm / 0-500 ppm) Typical Cross Sensitivity of SO2 Sensor (0-20 ppm / 0-100 ppm)

Reading Gas Concentration Reading

Gas Concentration
CO Carbon monoxide 300 ppm < 1 ppm
Hydrogen sulfide 15 ppm ~ 45 ppm Nitric oxide 50 ppm 0-5 ppm
Sulfur dioxide 5 ppm ~ 2.5 ppm Nitrogen dioxide 6 ppm < –10 ppm
Nitric oxide 35 ppm ~ 10 ppm Hydrogen Sulfide 25 ppm < 0.1 ppm
Chlorine 1 ppm –1 ppm Chlorine 5 ppm < –2 ppm
Hydrogen 100 ppm < 40 ppm Ammonia 20 ppm 0 ppm
Nitrogen dioxide 5 ppm ~ –3 ppm Hydrogen 400 ppm < 1 ppm
Hydrogen Cyanide 10 ppm < 5 ppm
Acetylene 10 ppm < 30 ppm
Ethene 50 ppm < 45 ppm

Typical Cross Sensitivity of Cl2 Sensor (0-10 ppm) Typical Cross Sensitivity of NO2 Sensor (0-20 ppm)

Gas Concentration Reading Gas Concentration Reading

Carbon monoxide 300 ppm 0 ppm Alcohols 1000 ppm 0 ppm
Hydrogen sulfide 15 ppm ~ –7.5 ppm Carbon dioxide 5000 ppm 0 ppm
Sulfur dioxide 5 ppm 0 ppm Chlorine 1 ppm ≤ 1 ppm
Nitric oxide 35 ppm 0 ppm Nitric oxide 100 ppm 0.4 ppm
Sulfur dioxide 20 ppm 5 ppm
Hydrogen 3000 ppm 0 ppm

For details on other interfering gases, please contact Detector Electronics Corp.

11.1 26 95-8616
 Appendix H

HART Communication

HART MENU STRUCTURE

This section displays the menu tree for the GT3000. The menu tree shows the primary commands and options
available when using menu selections of a HART handheld communicator.

11.1 27 95-8616
11.1
General Info

Process Menu 1) Manufacturer xxxxx

2) Model xxxxx
1) Gas Name xxxxx 3) Tag xxxxx DET-TRONICS
2) PV xx yy 4) Descriptor xxxxx
3) PV AO xx yy 5) Message xxxxx
4) PV URV xx yy 6) Final asmbly num xxx
5) PV LRV xx yy 7) Dev id xxxxx
6) SV xx yy
7) TV xx yy
Fault/Status Info
RTC Menu
Status Menu 1) Op Mode xxxxx
2) Cal State xxxxx 1) Seconds xxxxx
1) General Info 3) Snsr Status Byte1 xxxxx 2) Minutes xxxxx
2) Fault/Status Info 4) Snsr Status Byte2 xxxxx 3) Hours xxxxx
3) Device Information 5) Tx Status Byte 1 xxxxx 4) Day xxxxx
4) Sensor Information 6) Tx Status Byte 2 xxxxx 5) Month xxxxx
5) History Info 7) Snsr Fault Byte 1 xxxxx 6) Year xxxxx
6) Debug Menu 8) Snsr Fault Byte 2 xxxxx
9) Tx Fault Byte 1 xxxxx
Tx Fault Byte 2 xxxxx
Write Protect Menu Sensor History
Change the device write
Device Information 1) Snsr Run Hours xxxx
1) Change Write Protect protect setting.
GT3000 Root Menu Setup Menu 2) Write Protect xxxxx 2) Sensor Max Temp xxxx
1) RTC Menu 3) Max Temp Time
1) Process Menu 1) Write Protect Yes/No 2) Write Protect xxxxx 4) Sensor Min Temp xxxx
2) Status Menu 2) Write Protect Menu 3) Universal rev xxxxx 5) Min Temp Time
3) Setup Menu 3) Hart Option Menu Enter Password 4) Fld dev rev xxxxx 6) Snsr Hi Temp Rst xxxx
4) Calibration Menu 4) RTC Menu 5) Software rev xxxxx 7) Snsr Lo Temp Rst xxxx
5) Test Menu 5) Clear Configuration xxxxxxxx 6) Tx Serial Number xxxxx
7) Tx Hardware Rev
Tx History
8) Tx Firmware Rev
9) Tx Running Hrs xxxxx
1) Tx Running Hrs xxxx
Select Option Tx Temperature
2) Tx Max Temp xxxxx
3) Max Temp Time
Disable Sensor Information 4) Tx Min Temp xxxxx

28
Enable 5) Min Temp Time
Change Password 1) Sensor Sensitivity xxxxx
2) Sensor Type xxxxx Cal Log
Hart Option Menu 3) Snsr Serial Num xxxxx
Calibration Menu
4) Snsr Revision xxxxx Cal Log:
Change Password 5) PV USL xxxxx Index xxxx
1) Cal Gas Concentraton xx 1) Tag xxxxx
6) PV LSL xxxxx DD-MM-YY xx-xx-xx
2) Sensor Calibration 2) Descriptor xxxxx
xxxxxxxx 7) Snsr Hardware Rev hh:mm:ss xx:xx:xx
3) Response Factor xxx 3) Message xxxxx
8) Snsr Firmware Rev Cal Code xx
4) Snsr Cal Point Zero xxx 4) Poll Adrs xxxxx
9) Snsr Run Hours xxxxx Zero Value xx
5) Snsr Cal Point Span xxx 5) Date xxxxx
Snsr PPM Hours xxxxx Span Value xx
6) Change Gas Sensor Type 6) Final asmbly num xxxx

Event Log
History Info
Event Log:
1) Snsr History
Index xxxx
2) Tx History
DD-MM-YY xx-xx-xx
3) Read Calibration Log
Test Menu RTC Menu hh:mm:ss xx:xx:xx
4) Read Event Log
Event Code xx
1) Self Test 1) Seconds
2) Response Test 2) Minutes
3) Reset 3) Hours Debug Menu DD Build Version
4) Reset min-max Temps 4) Day
5) Loop Test 5) Month 1) Debug Hart Err Cntr xxxx GT3000 DD
6) D/A Trim 6) Year 2) Debug Modbus Err Cntr Build Version: xx.xx
3) DD Build Version Build Date: xxxxxx

GTX Firmware Version 1.04

Detector Electronics
DD Version 0.10 GT3000 March 16,2009
HART

95-8616
 Appendix I

Intrinsic safety ConTrol Drawing — FM

009803-001 Rev. D

11.1 29 95-8616
 Intrinsic safety ConTrol Drawing — CSA
009803-002 Rev. B

11.1 30 95-8616
 Explosion proof ConTrol Drawing — FM
012555-001 Rev. A

11.1 31 95-8616
 95-8616

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Leak Detector IR Flame Detector Combustible Gas Detector with GT3000 Toxic Gas Detector Safety System

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