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Guided Wave Radar Level Meter

Product Manual
 Directory

1、Product Overview ...............................................................................1

2、 Product Introduction ....................................................................3

3、 The Installation Requirements ........................................................3

4、 Structure Size ................................................................................8

5、The Electrical Connection ..................................................................8

6、 Adjustment Instructions .............................................................11

7、 Technical Parameters ...........................................................13

8、Product Selection & Ordering Information .....................................16

Material level meter selection parameter table......................17

 Guided Wave Radar Level Meter

1、Measurement Principle

Principle：
High-frequency microwave pulses issued by the guided wave radar propagate along
detection components (steel cable or steel rod), met the media to be measured, since the
dielectric constant of the mutation, cause reflections, a portion of the pulse energy is
reflected back. Transmit pulse and the reflected pulse is proportional to the distance and the
time interval measured media.

Features：
As a result of advanced microprocessor and unique cho Discovery echo processing
technology, guided wave radar level meter can be used in a variety of complex conditions.

Because of the type of process connections and detection components, making 70X Series
Guided Wave Radar Level Meter is suitable for a variety of complex conditions and
applications. Such as: high temperature, high pressure and low dielectric constant media.

Pulsed work, guided wave radar level instruments transmit power is very low, can be
installed in a variety of metals, non-metallic container, no harm to humans and the
environment.

Explanation：
Guided Wave Radar is a time travel to the principle of measuring instruments, radar run at
the speed of light, the running time can be converted into a level signal by electronic
components. When the pulse reaches the surface of the material, the pulse is reflected back
and is received by the receiving container inside the instrument, the distance the signal is
converted to level signals.
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Reflected pulse signal along the cable or rod probe type transmit to the instrument electronic
circuit parts, the microprocessor processes the signal, identify the microwave pulse echo
generated in the material surface. Correct identification of the echo signal are completed the
implementation by the pulse software ， D, the distance from the material surface and the
pulse travel time T is proportional:

D=C×T/2
Where C is the speed of light
Because the empty distance E is known, the level L is:
L=E-D

By entering the empty height of E (= zero), full tank

height F (= hundred) and the application to set some
parameters, application parameters will automatically
adapt the instrument to measure the environment,
corresponding to the 4-20mA output.

Measuring range：

Explanation：

H--- Measuring range

L---Empty distance
B---The top of the blind
E---The minimum distance from the probe to the tank wall

--Blind spot is the minimum distance between the top of

the highest material surface materials and measurement
reference point.
--The bottom of the blind refers to a distance near the very
bottom of the cable can not be accurately measured.
--Between the top and bottom of the blind is blind effective
measure distances.

Note:
In order to ensure the accuracy of level measurement, the material should be located
between the top and bottom of the blind the blind.

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2、Product Introduction

 701

Suitable for Medium: Liquid, solid powder

Application: Liquid and solid powder measure,
complicated process conditions
Explosion-proof Grade: Exia IIC T6 Ga/Exd IIC T6 Gb
Measuring Range: 30m
Frequency: 500MHz-1.8GHz
Antenna: Single cable or single rod antenna
Accuracy: ±10mm
Process Temperature:（-40～250）℃
Process pressure:（-0.1～4）MPa
Signal output:（4～20）mA/HART
The Scene Display: Four LCD/Can be programmed
Power Source: Two-wire (DC24V)
Four-wire（DC24V/AC220V）
Shell: Aluminum /Plastic
Connection: Flange (optional) / Thread

3、Installation Guide
Within the measurement range, determined not to come into contact with the cable or rod
internal obstacles, Therefore, the installation should be avoided as far as possible the tank
facilities, such as: human ladder, limit switches, heating devices, stand etc. Also note that
the cable or rod may not intersect with the material during feeding.

Also note that when installing the meter : Highest Level measurement can not enter
into the blind; Must be maintained between the instrument and the tank wall a certain
distance; When the meter is installed, try to stick with cable or perpendicular to the surface of
the measured medium. Meter installation in hazardous areas must comply with state
regulations explosion hazardous installation area. Intrinsically safe instrument requires the
use of shell with aluminum. Intrinsically safe instrument can be installed in explosion-proof
requirements of the occasion, the instrument must be connected to the earth.

Measurement reference plane is the sealing

surface of the thread.

1 Blind Range (Menu 1.9)

2 Cable Length (Menu 1.8)

3 Max.Measurement Range (Menu 1.2)

4 Min.Measurement Range (Menu 1.1)

5 reference Plane

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The following guidelines apply to the installation of the cable and the rod radar level
measuring solid powder or liquid.

 Installation position:
 Far away from the discharge port and inlet.
 Metal cans in the entire measuring range, not to touch the tank
wall and tank bottom.
Recommended meter installed in 1/4 or 1/6 of the silo diameter,
and the minimum distance is 1/10 of the tank wall of the measuring
range.
 Cable type or rod probe the minimum distance from the tank wall
≥300mm.
 Bottom of the probe from the tank bottom ≥30mm.
 The minimum distance from the probe obstructions ≥200mm.
 If the bottom of the container is a cone, you can install a central
tank top.

 Below is a single rod radar level meter installation drawings, mainly

used for liquid level measurement
Features:

 You can measure any dielectric permittivity of ≥1.8 .

 Generally used to measure viscosity ≤500cst, not prone to adhesion
medium.
 Rod radar maximum range of 6 m.
 Instrumentation for steam and foam has a strong penetrating power,
the measurement is not affected.
 For a lot of foam liquid measurement environment, you should select
a single rod guided wave radar level meter measurement.

 Below is double rod radar level meter installation

drawings, mainly for low dielectric constant liquid and solid
lightweight powder measurements
Features:

 For low dielectric constant of the liquid and light solid powder, can
double cable measurement mode, in order to ensure accurate
measurements.
 You can measure the dielectric constant of ≥1.6 in any medium.
 Generally used to measure viscosity ≤500cst, not prone to adhesion
medium.
 Double cable radar level meter maximum range of up to 30 meters.

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 Installation Method:

 Reasonable meter installation to ensure long-term reliable and accurate

measurement

Guided Wave Radar Level Meter can be connected by threaded, thread length should not
exceed 15mm, also can be installed on a short tube. When installing a short tube diameter of
2 "to 6", the installation of a short tube height should ≤100mm （ Thread length and short
tube shorter measurement will be more stable）, If you install a short pipe is longer, it is best
to cut it short, or using insulation bracket fixed cable type probe, avoiding probe in contact
with the short end of the pipe to further to affect the measurement.

 DN200 or DN250 installed in the short tube

When guided wave radar level meter need to be installed at the short pipe diameters greater
than 200mm, the short tube wall will produce an echo, the medium in the case of a low
dielectric constant can cause measurement errors. Therefore, with a diameter of 200mm or
250mm short tube, you need to choose a special flange with a "horn Interface" of.

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 Installation Notes on plastic containers

Whether cable or rod type, if you want to guided wave radar is working properly, the process
of connecting to the metal surface should be. When the guided wave radar mounted on a
plastic pot, If the tank top is plastic or other non-conductive material, the instrument needs
with metal flanges, the use of threaded connections, to be equipped with a metal plate.

 Optimized interference
 Interference echo suppression ： Software can be realized on disturbance echo
suppression, to achieve the desired measurement results.
 For a medium viscosity of less than 500cst, can bypass pipe or waveguide (Only for
liquids) to avoid interference.

 Installation of low dielectric constant of the liquid

For dielectric constant greater than 1.3, the viscosity ≤500cst, and is not easy adhesion
medium, guided wave radar meter can be installed in the waveguide is measured, has
the following characteristics:
 superior reliability, high-precision
 Can be used in any medium of dielectric constant ≥1.3, it doesn't matter between
measurement and conductive medium.
 obstructions and short pipe size does not affect the measurement

 Corrosive media measurement

If the measurement of corrosive media, the choice of rod or cable probe sets PTFE, PFA
sleeve measurement.

 installed in horizontal and vertical tank on tank

 Rod probe can be up to six meters, more than six meters for measuring distances tank,
the choice of 4mm rope probe.
 Installation and fixation with the same measurement of solid powder compartment.
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 Distance from the tank wall ≥300mm, the probe must avoid contact with the tank wall.
 In the choice of probe length, note at the bottom of the probe from the tank bottom
distance> 30mm.
 If obstructions are more, or too close to the probe by the sensor, it can then be
measured by installing tube waveguide.

 The matters needing attention:

 To be measured in the waveguide radar, generally used in rod probe sensors, during
installation You should use insulated bracket fixed probe, ensuring rod probe with
concentric waveguide, or they will have a very strong false echoes.

 When measuring range exceeds the maximum measuring range rod probe should be
used in guided wave radar probe cable, In this case waveguide diameter should be
greater than or equal to 6 ", otherwise it will generate strong false echoes.

 Installation of right and wrong

Wrong: Do not install the

meter above the feed
inlet stream, cable or rod
should avoid material
entrance.

Correct:
Note: when installed
outdoors take shade, rain
measures

 Moisture:

For instruments installed

outdoors or indoors and
wet cooling or heating of
the tank, in order to
moisture, should tighten
the cable jacket, but also
to the cable at the inlet
bend downward,
as shown in Figure

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4、Structure Size（Unit: mm）

5、The Electrical Connection

 Power Supply

(4～20) mA/HART（Two-wire）
Power supply and current signal are carried by the same two-wire
connection cable. See the Technical Specifications of this guide for
detailed requirement on power supply. A safety barrier should be placed
between power supply and instrument for intrinsically safe version.

(4～20) mA/HART（Four-wire）
Power supply and current signal are carried by two 2-wire connection
cables respectively. See the Technical Specifications of this guide for
detailed requirement on power supply.
Earth-connected current output can be used for standard version of level
instruments, while the explosion proof version must be operated with a
floating current output. Both instruments and earth terminals should be
connected with ground firmly and securely. Normally you can either choose
to connect with the earth terminal on vessel or adjacent ground in case of
plastic vessels.

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 Cable Connection

General Introduction Supply cable can use ordinary two-core cable, the
cable diameter should be (5 ~ 9) mm, to ensure that
the cable entry seal. If electromagnetic interference
exists, recommended to use shielded cable.
(4～20) mA/HART（Two-wire） Supply cable can use ordinary two-core cable.

(4～20) mA/HART（Four-wire） Supply cable should be used with a dedicated ground

cable.

Shielding and wiring The two ends of shielded cable must be connected with
earth terminal. The shielded cable must be connected
with inner earth terminal directly inside the transducer,
while the outside earth terminal on housing must be
connected with ground. In the event of earth-connected
current, the shielding side of shielded cable must be
connected to ground potential via a ceramic capacitor
(e.g. 1nF/1500V) in order to dampen the low frequency
grounding current and avoid the disturbance caused by
high frequency signals.

 Wiring Diagram

24V 2-wire:

220V 4-wire:

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 Explosion Proof Connection
The intrinsic safety version sensors (Exia IIc T6) use Alu-die casting housing and filling
Silicone rubber sealants internal structure aimed to prevent sparks resulted from circuit
failure from leaking out. It is applicable for the continuous level measurement of flammable
medium under Exia IIc T6.
A safety barrier FBS-2 must be used together with the intrinsic safety instrument. It is an
associated device to this product for the power supply of this product. The main specification
is intrinsic safety: Exia IIC, voltage of power supply: 24V DC ± 5%, short-circuit current:
135mA, operating current: 4...20mA.
All cables must be shielded. The max length is 500m for the cable from the barrier to the
sensor. Stray capacitor ≤ 0.1 μ F/Km, stray inductance 1mH/Km. Instrument must be
connected to the ground potential. Any unapproved associated device is not allowed to be
used.

Explosion Proof Zone None-Explosion-Proof Zone

Choose one

Adjustment with SOFTware

Explosion Proof Zone None-Explosion-Proof Zone

Choose one

Adjustment with HART Handheld Programmer

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 Safety instructions:
 Please observe the local electrical code requirements!
 Please comply with local requirements for personnel health and safety regulations.
All electrical components of instrument operation must be completed by the formal
training of professionals.
 Please check the instrument nameplate to provide product specifications meet your
requirements. Please make sure that the power supply voltage and instrument
nameplate on the requirements.

 Protection Grade:
The instrument fully meet the requirements of protection class IP66/67, make sure the cable
head waterproof seal. As shown below:

 How to ensure that the installation meets IP67 requirements:

 Make sure that the sealing head is not damaged.
 Make sure that the cable is not damaged.
 Make sure the cable is used in line with the electrical connection specifications.
 Before entering the electrical interface, the cable is bent down wardly, to ensure that
water does not flow into the casing, see ①
 Please tighten the cable sealing head, see ②
 Keep electrical interface with blind unused block after block tight, see ③

6、Adjustment Instructions

 Adjustment Methods：
1 Display/adjustment module ViewPoint）
2 An adjustment software
3 HART handheld programmer

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 Display / Adjustment Module
View Point is a display debugging tool that can be plugged in. The adjustment can be done
through operating with four buttons on View Point. Optional menu operation languages are
available for selection. View Point is only used for display after adjustment in that the
measurement results can be seen clearly through the glass window.

Display / Keypad

1 Liquid Crystal Display

2 Adjustment Keypad

 PC debugging

Connect with another unit

Ω
through HART
24 VDC
Power supply
1 RS232 Connect Cable /USB port
2 Radar level meter
3 HATR port adapter used
on COMWAY convertor
4 250 ohm Resistance

 HART Handheld Programmer

Adjust meter with HART

Handheld Programmer

1 HART Handheld Programmer

24 VDC
2 Radar level meter Power supply

3 250 ohm Resistance

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7、Technical Specification

General Parameters
Probe Material:
Rod Stainless Steel 316L/PTFE
Cable Stainless Steel 316L/PTFE
Coax Stainless Steel 316L/PTFE
Seal Viton fluororubber , Kalrez Fluorinated rubber
Process Connection Stainless Steel 316L
Shell Stainless Steel 316L, Plastic，Aluminum
Alu-die casting, Powder Coated
Seal ring between the
shell and the shell Silicone Rubber
View Point Window Polycarbonate
Ground Terminal Stainless Steel 316L

Power

2-Wire Standard Version (16～26)V DC

Intrinsic Safe Version (21.6～26.4)V DC
Power Consumption max. 22.5mA
Ripple Allowed
- <100Hz Uss < lV
- (100～100K)Hz Uss < l0mV

Flameproof Type
(22.8 ~ 26.4) V DC 2-wire system
(198 ~242)V AC 4-wire system / 110V AC 4-wire system
Power Consumption max. 1VA，1W

Parameters on Cable
Cable Entry/Plug One cable entry of M20xl.5 (cable diameter of 5～9mm)
One blind stopper M20xl.5
Spring Connection Terminal Applicable for cables with cross section of 2.5mm

Output
Output Signal (4～20)mA/HART
Resolution 1.6μA
Failure mode 20.5mA；22mA；3.9mA, hold
2-wire load resistance See the diagram below
4-wire load resistance Max.500 ohm
Integration Time ( 0～36)sec, adjustable

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Technical data

Max Measurement Distance

701 30m/6m（Cable /Rod）

Measurement Interval About 1sec (Depend on parameter settings)

Adjustment Time About 1sec (Depend on parameter settings)

Resolution of Display 1mm

Accuracy ±10mm(See the accuracy illustration diagram below)

The accuracy illustration diagram

Temperature for Storage/Transport (-40～80) ℃

Process Temperature (Probe)

701 (-40～250)℃

Relative Humidity ＜95%

Pressure Max. 40MPa

Vibration Proof Mechanical vibration 10m/s² , (10～150)Hz

Max Pulling Force See the illustrative diagram on pulling force

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When measuring solid medium, the pulling force is determined by the diameter of vessel and
medium level, some examples of pulling force generated by typical medium are shown on
the diagrams below.

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8、Product Selection & Ordering Information
 701
Maximum Range / Type of detecting component
30000mm/ Single cable type or 6000mm / single rod type
Explosion Proof Approval
P Standard (Without Approval)
I Intrinsically Safe（Exia IIC T6 Ga）
G Flameproof （Exd IIC T6 Gb）
Type of detecting component /Material
A Cable Φ8mm / Stainless Steel 304
B Cable Φ4mm / Stainless Steel 316L
C Rod Φ10mm / Stainless Steel 304
D Rod Φ10mm / Stainless Steel 316L
Process Connection /Material
G Thread G1½″ A
N Thread 1½″ NPT
C Flange DN50 PN16C / Stainless Steel
D Flange DN80 PN16C / Stainless Steel
E Flange DN100 PN16C / Stainless Steel
F Flange DN150 PN16C / Stainless Steel
H Flange DN200 PN16C / Stainless Steel
I Flange 2〞150LBS ANSI Convex / Stainless Steel 316L
J Flange 3〞150LBS ANSI Convex / Stainless Steel 316L
K Flange 4〞150LBS ANSI Convex / Stainless Steel 316L
L Flange 6〞150LBS ANSI Convex / Stainless Steel 316L
M Flange 8〞150LBS ANSI Convex / Stainless Steel 316 L
Seal / Process Temperature
1. Normal (-40～130)℃
2. High Temperature (-40～250)℃
The Electronic Unit
3 (4~20) mA / 24V DC / HART two wire system
4 (4~20) mA / 220V AC / HART four wire system
5 RS485 Modbus / 6~24V four wire system
Outer Covering / Protection Class
L Aluminum / Single cavity / IP67
H Aluminum / Double cavity / IP67
G Plastic / Single cavity / IP65
K Stainless steel / Single cavity / IP67
Cable Line
M M 20 x 1.5
N ½″ NPT
Display / Programming
A With
X Without

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Material level meter selection parameter table
Customer information
Company: Contact:
Address: Zip code:
The Telephone: Fax: Mobile phone:
E-mail: Date:

License
□The standard type (Non-explosion-proof) □ Intrinsically safe (Exia IIB T5)
□ Intrinsically safe (Exia IIC T6 Ga) □ Intrinsically safe+marine license (Exia IIC T6 Ga)
□ Intrinsically safe and Flame proof (Exd IIC T6 Gb)

Tank / Container Information

The Types of Tank:
□ Tank □ Reaction Tank □ Separation Tank □ Marine Tank
The Tank Structure:
Material of Tank: Pressure:
Tank size:
Tank Height: m Diameter:
The top of the tank:
□ Vault □ Flat □ Open □ Cone type
The bottom of the tank:
□ Cone bottom □ Flat □ Slope bottom □ Arc bottom
Installation:
□ Top installation □ Side installation
□ The bypass pipe mount □ Guided wave pipe installation
Installation takes over the top of the tank (information):
Height of take over : mm Diameter of take over :: mm

Measurement of Medium
Media name: □ Lliquid □ Solid □ Mixed Media
Medium temperature: ℃
Dielectric Constant:
Linked material: □ Yes □ No
Mixing: □ Yes □ No

Process Connection
Thread: □ G1½″ A □ 1½″ NPT
Flange □ Flange (DN= ) □ Flange (ANSI= )
Power supply:
□ 24V DC Two wire system □ 24V DC Four wire system □ 220V AC Four wire
system
Output: □ 4-20mA □ HART
Display: □ Take the meter display program □ Without meter display program

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