Reference manual

Compact Temperatur Calibrator

Jofra CTC-320/650 B
Jofra CTC-1200 A
 Reference Manual
Temperature Calibrator
JOFRA CTC-320/650 B
JOFRA CTC-1200 A
 Copyright 2003 AMETEK Denmark A/S
About this manual….

• The structure of the manual

This reference manual is aimed at users who are familiar with
AMETEK calibrators, as well as those who are not. The manual
is divided into 11 chapters which describe how to set up,
operate, service and maintain the calibrator. The technical
specifications are described and accessories may be ordered
from the list of accessories.
Along with the calibrator, you should have received a multi-
lingual user manual which sets out the operating instructions for
the instrument. It is designed to provide a quick reference guide
for use in the field.

• Safety symbols
This manual contains a number of safety symbols designed to
draw your attention to instructions which must be followed when
using the instrument, as well as any risks involved.

Warning
Conditions and actions which may compromise
the safe use of the instrument and result in
considerable personal injury or material damage.

Caution…
Conditions and actions which may compromise
the safe use of the instrument and result in slight
personal or material damage.

Note…
Special situations which demand the user’s
attention.

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List of contents
1.0 Introduction ............................................................................ 4
1.1 Warranty ....................................................................................... 5
2.0 Safety instructions ................................................................. 6
3.0 Setting up the calibrator ...................................................... 11
3.1 Receipt of the calibrator .............................................................. 11
3.2 Preparing the calibrator .............................................................. 12
3.3 Choice of insertion tube .............................................................. 15
3.4 Inserting the sensor .................................................................... 17
3.4.1 CTC-320/650 B .............................................................. 18
3.4.2 CTC-1200 A ................................................................... 20
4.0 Operating the calibrator ....................................................... 22
4.1 Keyboard, display and connections ............................................ 22
4.2 Starting the calibrator .................................................................. 25
4.3 Selecting the set-temperature..................................................... 25
4.4 Using the SWITCH TEST ........................................................... 27
4.5 Using the AUTO STEP ............................................................... 31
4.6 Using the MENU ......................................................................... 34
4.6.1 Adjusting the temperature unit ....................................... 35
4.6.2 Adjusting the max-temperature ...................................... 36
4.6.3 Adjusting the SWITCH TEST slope rate ........................ 36
4.6.4 Adjusting the extra stability time .................................... 37
4.6.5 Adjusting the temperature resolution ............................. 37
4.7 Simulation/training ...................................................................... 38
5.0 Storing and transporting the calibrator .............................. 39
6.0 Errors .................................................................................... 42
7.0 Setting the mains voltage and replacing the fuses ........... 44
7.1 Returning the calibrator for service ............................................. 45
8.0 Maintenance ......................................................................... 47
8.1 Cleaning ...................................................................................... 47
8.2 Adjusting and calibrating the instrument ..................................... 49
8.2.1 Adjusting the calibration date ......................................... 51
8.2.2 Calibrating/adjusting the instrument .............................. 52
9.0 Technical specifications ...................................................... 56
10.0 List of accessories ............................................................... 65
11.0 Standard insertion tubes ..................................................... 67
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1.0 Introduction

Congratulations on your new AMETEK Jofra CTC

Calibrator!
With the AMETEK Jofra calibrator, you have chosen an extremely
effective instrument which we hope will live up to all your
expectations. Over the past many years, we have acquired extensive
knowledge of industrial temperature calibration. This expertise is
reflected in our products which are all designed for daily use in an
industrial environment. Please note that we would be very interested
in hearing from you if you have any ideas or suggestions for changes
to our products.

This reference manual applies to the following instruments:

• Jofra CTC-320 B (with RS232)

• Jofra CTC-650 B (with RS232)
• Jofra CTC-1200 A (with RS232)

ISO-9001 certified
AMETEK Denmark A/S was ISO-9001 certified in September 1994
by Bureau Veritas Certification Denmark.

CE-label

Your new temperature calibrator bears the CE label

and conforms to the Electromagnetic Compatibility
(EMC) Directive 2014/30/EU and the Low Voltage
Directive 2014/35/EU and RoHS Recast (RoHS II)
Directive 2011/65/EU*.

* CTC-320 B from serial no. xxxxxx-00627, CTC-650 B from serial no. xxxxxx-01124 and CTC-1200 A from
serial no. xxxxxx-00946

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Technical assistance
Please contact the dealer from whom you acquired the instrument if
you require technical assistance.

1.1 Warranty

This instrument is warranted against defects in workmanship, material

and design for two (2) years from date of delivery to the extent that
AMETEK will, at its sole option, repair or replace the instrument or
any part thereof which is defective, provided, however, that this
warranty shall not apply to instruments subjected to tampering or,
abuse, or exposed to highly corrosive conditions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES
WHETHER EXPRESS OR IMPLIED AND AMETEK HEREBY
DISCLAIMS ALL OTHER WARRANTIES, INCLUDING, WITHOUT
LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE OR MERCHANTABILITY. AMETEK SHALL NOT BE
LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES,
INCLUDING, BUT NOT LIMITED TO, ANY ANTICIPATED OR LOST
PROFITS.
This warranty is voidable if the purchaser fails to follow any and all
instructions, warnings or cautions in the instrument’s User Manual.
If a manufacturing defect is found, AMETEK will replace or repair the
instrument or replace any defective part thereof without charge;
however, AMETEK’s obligation hereunder does not include the cost
of transportation, which must be borne by the customer. AMETEK
assumes no responsibility for damage in transit, and any claims for
such damage should be presented to the carrier by the purchaser.

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2.0 Safety instructions

Read this manual carefully before using

the instrument!
Please follow the instructions and procedures described
in this manual. They are designed to allow you to get
the most out of your calibrator and avoid any personal
injuries and/or damage to the instrument.

Disposal – WEEE Directive

These calibrators contain Electrical and Electronic
circuits and must be recycled or disposed of properly (in
accordance with the WEEE Directive 2012/19/EU).

Warning
About the use:
• The calibrator must not be used for any purposes
other than those described in this manual, as it
might cause a hazard.
• The calibrator has been designed for indoor use
only and is not to be used in wet locations.
• The calibrator is not to be used in hazardous
areas, where vapour or gas leaks, etc. may
constitute a danger of explosion.
• The calibrator is not designed for operation in
altitudes above 2000 meters.
• The calibrator is a CLASS I product and must be
connected to a mains outlet with a protective earth
connection. Ensure the ground connection of the
calibrator is properly connected to the protective
earth before switching on the calibrator. Always use
a mains power cable with a mains plug that
connects to the protective earth.

6 2017-08-15 123198 08
 • To ensure the connection to protective earth any
extension cord used must also have a protective
earth conductor.
• Only use a mains power cord with a current rating as
specified by the calibrator and which is approved for
the voltage and plug configuration in your area.
• Before switching on the calibrator make sure that it
is set to the voltage of the mains electricity supply.
• Always position the calibrator to enable easy and
quick disconnection of the power source (mains inlet
socket).
• The calibrator must be kept clear within an area of
20 cm on all sides and 1 metre above the calibrator
due to fire hazard.
• Never use heat transfer fluids such as silicone, oil,
paste, etc. in the dry-block calibrators. These fluids
may penetrate the calibrator and cause electrical
hazard, damage or create poisonous fumes.
• The calibrator must be switched off before any
attempt to service the instrument is made. There are
no user serviceable parts inside the calibrator.
• When cleaning the well or the insertion tube,
REMEMBER to wear goggles when using
compressed air!
About the frontpanel:
• The connectors, on the front panel of the calibrator,
must NEVER be connected to a voltage source.
• Thermostats must not be connected to any other
voltage source during a test.

About insertion tubes and insulation plugs:

• Never leave hot insertion tubes which have been
removed from the calibrator unsupervised – they
may constitute a fire hazard or personal injury.
If you intend to store the calibrator in the aluminium
carrying case after use, you must ensure that the
instrument has cooled to a temperature below
123198 08 2017-08-15 7
 100°C/212°F before placing it in the carrying case.
• Never place a hot insertion tube in the optional
carrying case.
• Use only insulation plugs supplied by AMETEK
Denmark A/S.
• Never try to modify the insulation plugs to make
them fit the sensor (CTC-1200 A only).

About the fuses:

• The fuse box must not be removed from the power
control switch until the mains cable has been
disconnected.
• The two main fuses must have the specified current
and voltage rating and be of the specified type. The
use of makeshift fuses and the short-circuiting of
fuse holders are prohibited and may cause a hazard.

Caution – Hot surface

This symbol is engraved in the grid plate.
• Do not touch the grid plate, the well or the
insertion tube as the calibrator is heating up –
they may be very hot and cause burns.
• Do not touch the tip of the sensor when it is
removed from the insertion tube/well – it may be
very hot and cause burns.
• Do not touch the handle of the calibrator during use
– it may be very hot and cause burns.
• Over 50°C/122°F
If the calibrator has been heated up to temperatures
above 50°C/122°F, you must wait until the instrument
reaches a temperature below 50°C/122°F before you
switch it off.
• Do not remove the insert from the calibrator
before the insert has cooled down to less than
50°C/122°F.

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 Caution…
About the use:
• Do not use the instrument if the fan is out of order.
• Before cleaning the calibrator, you must switch it
off, allow it to cool down and remove all cables.

About the well, insertion tube and grid plate:

• The well and the insertion tube must be clean before
use.
• Do not pour any form of liquids into the well. It might
damage the well.
• Scratches and other damage to the insertion tubes
should be avoided by storing the insertion tubes
carefully when not in use.
• The insertion tube must never be forced into the
well. The well could be damaged as a result, and the
insertion tube may get stuck.
• Before using new insertion tubes for the calibration,
the insertion tubes must be heated up to maximum
temperature – 320°C(608°F) / 650°C (1202°F) /
1205°C (2201°F) - for a period of minimum 30
minutes (CTC-320/650/1200 only).
• The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause corrosion
oxidation on the insertion tube inside the instrument.
There is a risk that the insertion tube may get stuck if
this is allowed to happen.
• If the calibrator is to be transported, the insertion
tube must be removed from the well to avoid
damage to the instrument. If the insertion tube is not
removed from the CTC-1200 A the ceramic well
might crack.

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 Note…
The product liability only applies if the instrument is
subject to a manufacturing defect. This liability becomes
void if the user fails to follow the instructions set out in
this manual or uses unauthorised spare parts.

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3.0 Setting up the calibrator

3.1 Receipt of the calibrator

When you receive the instrument…

• Carefully unpack and check the calibrator and the accessories.
• Check the parts off against the list shown below.
If any of the parts are missing or damaged, please contact the
dealer who sold the calibrator.

TS
EN
UM
I N STR
ON
TI
RA
LIB
CA

You should receive:

• 1 calibrator

• 1 mains cable

• 1 set of test cables (1 black, 1 red)

• 1 insertion tube

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• 3 pcs. insulation plugs matching the sensor size.
(CTC-1200 A only)

• 1 tool for insertion tube

• 1 traceable certificate

• 1 RS 232 serial cable

• 1 USB key containing reference manual and

software package “JOFRACAL”

When reordering, please specify the parts number found

in the list of accessories, section 10.0.

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3.2 Preparing the calibrator

Warning
• The calibrator has been designed for indoor use only
and is not to be used in wet locations.
• The calibrator is not to be used in hazardous areas,
where vapour or gas leaks, etc. may constitute a danger
of explosion.
• The calibrator is not designed for operation in altitudes
above 2000 meters.
• The calibrator is a CLASS I product and must be
connected to a mains outlet with a protective earth
connection. Ensure the ground connection of the
calibrator is properly connected to the protective earth
before switching on the calibrator. Always use a mains
power cable with a mains plug that connects to the
protective earth.
• To ensure the connection to protective earth any
extension cord used must also have a protective earth
conductor.
• Only use a mains power cord with a current rating as
specified by the calibrator and which is approved for the
voltage and plug configuration in your area.
• Before switching on the calibrator make sure that it is
set to the voltage of the mains electricity supply.
• Always position the calibrator to enable easy and quick
disconnection of the power source (mains inlet socket).
• The calibrator must be kept clear within an area of 20
cm on all sides and 1 metre above the calibrator due to
fire hazard.

Note…
The instrument must not be exposed to draughts.

123198 08 2017-08-15 13
 S
NT
E
UM
TR
I NS
ION
AT
R
LIB
CA

Fig. 1

When setting up the calibrator, you must…

1 Place the calibrator on an even horizontal surface in the spot
you intend to use it.

Caution…
Do not use the instrument if the fan is out of order.

2 Ensure a free supply of air to the fan located at the bottom of

the instrument.
3 Check the voltage of the power control switch (on/off switch
(230V/115V)). If the voltage of the power control switch
differs from the line voltage, you must adjust the voltage of
the power control switch as follows (see Fig. 1):

14 2017-08-15 123198 08
 Warning
The two main fuses must have the specified current and
voltage rating and be of the specified type. The use of
makeshift fuses and the short-circuiting of fuse holders are
prohibited and may cause a hazard.

A. Open the fuse box lid using a screwdriver.

B. Take out the fuse box.
C. Remove both fuses replacing them with two new fuses.
These must be identical and should correspond to the
line voltage. See section 10.0.
B. Turn the fuse box 180° and slide it into place.
4 Check that the earth connection for the instrument is present
and attach the cable.

Select an insertion tube with the correct bore diameter. See

section 3.3 for information on how to select insertion tubes.

The calibrator is now ready for use.

3.3 Choice of insertion tube

Caution…
To get the best results out of your calibrator, the insertion
tube dimensions, tolerance and material are critical. We
highly advise using the JOFRA insertion tubes, as they
guarantee trouble free operation. Use of other insertion
tubes may reduce performance of the calibrator and cause
the insertion tube to get stuck.

Caution…
Before using new insertion tubes for the calibration in the
CTC-320/650/1200 instruments the insertion tubes must be
heated up to maximum temperature – 320°C(608°F) / 650°C
(1202°F) / 1205°C (2201°F) - for a period of minimum 30
minutes.

123198 08 2017-08-15 15
Insertion tubes are selected on the basis of the diameter of the
sensor to be calibrated.
Use the table for insertion tubes in section 10.0 to find the correct
parts number.
Alternatively, you may order an undrilled insertion tube and drill the
required hole yourself. The finished dimension should be as follows:
• Sensor diameter +0.2 +0.05 mm.
• Sensor diameter +0.5±0.05 mm (CTC-1200 A)

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3.4 Inserting the sensor

Before inserting the sensor and switching on the calibrator, please

note the following important warning:

Warning
• Never use heat transfer fluids such as silicone, oil,
paste, etc. in the dry-block calibrator.
These fluids may penetrate the calibrator and cause
electrical hazard, damage or create poisonous fumes.
• Use only insulation plugs supplied by AMETEK
Denmark A/S.

Caution…
• The well and the insertion tube must be clean before
use.
• Do not pour any form of liquids in the well. It might
damage the well.
• Scratches and other damage to the insertion tubes
should be avoided by storing the insertion tubes
carefully when not in use.
• The insertion tube must never be forced into the well.
The well could be damaged as a result, and the
insertion tube may get stuck.

Caution – Hot surface

• Do not touch the grid plate, the well or the insertion
tube as the calibrator is heating up – they may be very
hot and cause burns.
• Do not touch the tip of the sensor when it is removed
from the insertion tube/well – it may be very hot and
cause burns.
• Do not touch the handle of the calibrator during use – it
may be very hot and cause burns.

123198 08 2017-08-15 17
3.4.1 CTC-320/650 B

Insert the sensor as shown in Fig. 2.

Sensor under test

Insertion tube

Thermal protection shield

TS
M EN
U
TR
I NS
ION
AT
BR
LI
CA

Fig. 2
In order to spare the sensor and its connections it is recommended to
use a heat protection shield (104216) at high temperatures.

18 2017-08-15 123198 08
If the design of the sensor permits it, you are advised to use an
insulation tube and insulation as shown in Fig. 3.

Fig. 3

123198 08 2017-08-15 19
3.4.2 CTC-1200 A

Insert the sensor as shown in Fig. 4.

Cover

Insulation plug

Fig. 4
Check that the insulation plug fits the diameter of the sensor.
Otherwise replace it (see list of accessories, chapter 10.0 for
available insulation plugs)

Warning
Never try to modify the insulation plugs to make them fit
the sensor.

20 2017-08-15 123198 08
 Sensor
External reference sensor

Internal sensor
Insertion tube
Heating wire
Well

Fig. 5

The sensor is placed in the insert so that the active part of the sensor
is inside the active area of the insertion tube. The active area is from
the bottom of the insertion tube and 40 mm up.

123198 08 2017-08-15 21
4.0 Operating the calibrator
4.1 Keyboard, display and connections

Keyboard

CALIBRATION INSTRUMENTS

SWITCH AUTO ESC

TEST STEP MENU

Fig. 6

Pos. Description
1 LCD.

2 SWITCH TEST button used to activate SWITCH TEST.

The function automatically detects the opening/closing
temperatures for thermostats.
3 AUTO STEP button used to activate AUTO STEP.
The function is used to switch between a series of set-
temperatures automatically.
4 ESC/MENU button used as Escape key or to activate the
menu system (hold button down for min. 2 seconds).
5 ENTER button used to accept chosen options.

6 DOWN ARROW button used to adjust temperature values

(value decreases) and to select menu options.

22 2017-08-15 123198 08
 7 UP ARROW button used to adjust temperature values
(value increases) and to select menu options.

Display

Fig. 7

Pos. Description
1 CHECKMARK displayed when the calibrator is stable.

2 SWITCH TEST input open.

3 SWITCH TEST input closed.

4 AUTO STEP symbol used to indicate that the function is

active (symbol flashes repeatedly).
5 Used to display set-temperatures, time-until-stable and
parameter values in the menu system.
6 Minute time unit for bottom display.

7 Fahrenheit temperature unit for bottom display.

8 Celsius temperature unit for bottom display.

9 Fahrenheit temperature unit for top display.

123198 08 2017-08-15 23

Celsius temperature unit for top display.

Used to display Read-temperature and parameters in the

menu system.

Connections

Warning
• The connectors, pos. 2 on the front panel, must NEVER
be connected to a voltage source.
• Thermostats must not be connected to any other
voltage source during a test.

All connections are located on the front panel.

+ -
Switch Test

RS232

Fuse
230V 5AF/115V 10AF

115V

Fig. 8

Pos. Description
1 Power control switch with connection for cable and on/off
switch. Also contains the main fuse. See section 7.0 for
information on how to change the fuses and setting the
mains voltage.
2 Connection for thermostat test.

3 Connection for RS232 cable.

24 2017-08-15 123198 08
 Note that all PC-equipment, which are connected to the
calibrator must observe the directive IEC950.

4.2 Starting the calibrator

Switch the calibrator on using the power control switch (pos.

1 in Fig. 8).

The instrument is initialised and the last calibration date is

displayed:

The calibration date will be displayed for approx. 2 seconds.

The initialisation process has been completed and the
calibrator is ready for use.

All settings are stored when the calibrator is switched off.

When the instrument is switched back on again, the status
will be the same as when it was switched off.

4.3 Selecting the set-temperature

Press or to adjust the set-temperature.

The current selection flashes in the bottom display:
°C

°C

The starting point is the last chosen set-temperature (even if

the instrument has been switched off).

123198 08 2017-08-15 25
 Press to accept the change or to cancel.


The calibrator will now heat up/cool down.
The top display continuously shows the read-temperature.
The bottom display shows either the set-temperature or the
estimated time in whole minutes until the calibrator will be
stable:
°C

min

When the calibrator is stable the display will show the

checkmark symbol. The instrument will emit an audible alarm
and the estimated time until stable will be replaced by the
set-temperature:
°C

°C

26 2017-08-15 123198 08
4.4 Using the SWITCH TEST

SWITCH TEST automatically locates the switch temperature of a

thermostat.

You must enter a temperature range Tmin - Tmax , within which the
switch temperature is expected to be found. You must also specify
the slope rate to be used during the test in SETUP (the smaller the
value, the more accurate the results of the test and the longer the test
will take).

The function can be illustrated using the following example:

Fig. 9

Press .


The symbols for SWITCH TEST will flash to indicate
that the function is active.

The function can be cancelled at any time by pressing .

123198 08 2017-08-15 27
 Press or to select the required Tmin:

°C

Press to accept your selection.

Press or to select the required Tmax:

°C

Press to accept your selection.

The calibrator will now start working towards the Tmin:
°C

°C

Once the Tmin has been reached and the calibrator is stable, the
instrument will emit an audible alarm and display the status for one
second:
°C

°C

28 2017-08-15 123198 08
The calibrator will now start working towards the Tmax using the slope
rate selected in SETUP. The flashing SWITCH TEST symbol
indicates the current status:
°C

°C

The instrument will check for changes in the SWITCH TEST. If no

change has been detected by the time Tmax is reached, the instrument
will register an ERROR.

The calibrator will stabilise at this temperature, and then work towards
the Tmin using the slope rate selected in SETUP.
The flashing SWITCH TEST symbol indicates the current status:
°C

°C

The instrument will check for changes in the SWITCH TEST input
once again. If no change has been detected by the time the Tmin has
been reached, the instrument will register an ERROR.

The results of the test will be displayed as 3 values: an “Open”

temperature, a “Close” temperature and a “Hyste” hysteresis
temperature (the difference between the two temperatures).

The open temperature is shown first:

°C

Press to display the close temperature:

°C

123198 08 2017-08-15 29
 Press to display the hysteresis temperature:

°C

If a temperature has not been found, the instrument will

display an “Error” (the “Hyste” temperature will also be
shown as an “Error”):

Press or to end the SWITCH TEST. The

instrument will store the Tmin and Tmax until the next time the
SWITCH TEST is activated.

Note…
you can activate or during the test to display the
temporary results.

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4.5 Using the AUTO STEP

AUTO STEP is used to step automatically between a range of

different calibration temperatures. This is useful when calibrating
sensors in places which are hard to reach, and when calibrating
sensors for which the output is displayed in a different location.

The function can be illustrated using the following example:

Fig. 10

Press .


The symbol for AUTO STEP flashes to indicate that
the function is active.

The function can be cancelled at any time by pressing

123198 08 2017-08-15 31
 Press or to select the required number of steps

(minimum 2 steps, maximum 9 steps):

Press to accept your selection.

Press or to select the required set-temperature for

step 1:

°C

Press to accept your selection.

Repeat the above procedure for all temperature steps.

Press to accept your choices once you have adjusted

the last temperature step.

Press or to set the amount of extra time you wish

the calibrator to remain at every step:

min

Press to accept your selection.

32 2017-08-15 123198 08
The following will be displayed for one second to indicate that the
calibrator is ready to work towards the set-temperature:

°C

The calibrator will now work towards the given set-temperature. An

audible alarm will be emitted once the calibrator is stable.
The calibrator will wait the specified amount of extra time. The
instrument indicates this by counting down the amount of time
remaining:
°C

min

The calibrator will then go to the next step. The procedure is the
same as for the first step. This process will be repeated until the last
step has been executed and the function has been completed.

123198 08 2017-08-15 33
4.6 Using the MENU

Hold down for more than approx. 2 seconds:

Press to select SETUP.

Press or to switch between the adjustable

parameters:

⇑⇓

⇑⇓

⇑⇓

⇑⇓

34 2017-08-15 123198 08
 If you wish to exit SETUP, simply press .


The instrument will ignore all changes if you press when

adjusting any of the parameters.

Press to adjust the parameter.

4.6.1 Adjusting the temperature unit

Press or to switch between °C and °F:

°C

- and

°F

Press to accept your selection.

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4.6.2 Adjusting the max-temperature

Press or to set the max-temperature in steps of

0.1°C or 0.1°F:

°C

If the current set-temperature is higher than the new max-

temperature, you will need to adjust the set-temperature.
The instrument will immediately begin to cool (if required) as
soon as the new max-temperature is accepted.

Press to accept your selection.

If you wish to exit SETUP, simply press .

4.6.3 Adjusting the SWITCH TEST slope rate

Press or to set the SWITCH TEST slope rate to a

temperature between 0.1°C and 9.9°C/minutes in steps of
0.1°C (if your chosen temperature unit is °F, the range will
change to between 0.1°F and 9.9°F/minutes in steps of
0.1°F):

°C

Press to accept your selection.

36 2017-08-15 123198 08
4.6.4 Adjusting the extra stability time

The extra stability time is the amount of extra time you wish to elapse
before the checkmark symbol is displayed after the calibrator has
stabilised.

Press or to set the time to anywhere between 0 and

20 minutes:

min

Press to accept your selection.

4.6.5 Adjusting the temperature resolution

Press or to select the required number of decimals:

°C

- and

°C

Press to accept your selection.

123198 08 2017-08-15 37
4.7 Simulation/training

Hold down the and buttons while you switch on the

calibrator.
The instrument will display the following screen:

The instrument will then revert to the standard display.

The calibrator’s simulation mode is used to train personnel in the use

of the instrument, etc. The simulation setting differs from the standard
setting as follows:
• The instrument will not actually heat up or cool down the well.
• The heating and cooling processes are simulated at around 10
times the normal speed of these operations.

The calibrator will remain in simulation mode until it is switched off.

38 2017-08-15 123198 08
5.0 Storing and transporting the calibrator

Caution…
The following guidelines should always be observed when
storing and transporting the calibrator. This will ensure that
the instrument and the sensor remain in good working order.

Switch off the calibrator using the power control switch.

Note that the calibration procedure may be interrupted at any time
using the power control switch. Switching off the calibrator during the
calibration process will not damage either the instrument or the
sensor.

S
E NT
TRUM
I NS
ON
ATI
I BR
CAL

Fig. 11

123198 08 2017-08-15 39
The following routine must be observed before the insertion tube is
removed and the instrument switched off:

Over 50°C/122°F
If the calibrator has been heated up to temperatures above
50°C/122°F, you must wait until the instrument reaches a
temperature below 50°C/122°F before you switch it off.

Remove the insertion tube from the calibrator using the tool for
insertion tube supplied with the instrument as shown in Fig. 11.

Caution – Hot surface

Do not remove the insert from the calibrator before the insert
has cooled down to less than 50°C/122°F

Caution…
• The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause corrosion oxidation on
the insertion tube inside the instrument. There is a risk
that the insertion tube may get stuck if this is allowed to
happen.
• If the calibrator is to be transported, the insertion tube
must be removed to avoid damage to the instrument. If
the insertion tube is not removed from the CTC-1200 A
the ceramic well might crack.

40 2017-08-15 123198 08
 Warning
• Never leave hot insertion tubes which have been
removed from the calibrator unsupervised – they may
constitute a fire hazard or personal injury.
If you intend to store the calibrator in the optional
aluminium carrying case after use, you must ensure that
the instrument has cooled to a temperature below
100°C/212°F before placing it in the carrying case.
• Never place a hot insertion tube in the optional carrying
case.

123198 08 2017-08-15 41
6.0 Errors

Warning
The calibrator must be switched off before any attempt to
service the instrument is made. There are no user
serviceable parts inside the calibrator.

Note…
AMETEK Denmark’s liability ceases if:
• parts are replaced/repaired using spare parts which are
not identical to those recommended by the manufacturer.
• non-original parts are used in any way when operating
the instrument.
AMETEK Denmark’s liability is restricted to errors which
originated from the factory.

If the calibrator detects an error during operation, the instrument will

terminate all functions and display an error code:

ERROR 0001

Likely cause: Defective RTD-sensor or excessively high

temperature measured by the instrument’s internal
sensor.
Solution: The calibrator should be returned to the
manufacturer for service.

ERROR 0002

Likely cause: The calibration coefficients have not been accepted.

Solution: Try again. If the error message returns, the
calibrator should be returned to the manufacturer
for service.

42 2017-08-15 123198 08
ERROR 0003

Likely cause: An error has occurred in the control circuit.

Solution: The calibrator should be returned to the
manufacturer for service.

ERROR 0004

Likely cause: Incorrect mains frequency setting.

Solution: Mains frequency not compatible with instrument
configuration.
Please contact AMETEK Denmark A/S for
guidance.

Nothing happens when the power control switch (on/off switch)

is pressed.

Likely cause: There is no power to the calibrator.

Solution: Check that the calibrator is correctly connected.
Check the fuse.
If there are no problems with the mains cable or the
fuse, the calibrator should be returned to the
manufacturer for service.

123198 08 2017-08-15 43
7.0 Setting the mains voltage and
replacing the fuses

Warning
• The calibrator must be switched off before any attempt
to service the instrument is made. There are no user
serviceable parts inside the calibrator.
• The fuse box must not be removed from the power
control switch until the mains cable has been
disconnected.
• The two main fuses must have the specified current and
voltage rating and be of the specified type. The use of
makeshift fuses and the short-circuiting of fuse holders
are prohibited and may cause a hazard.

TS
N
ME
RU
T
INS
I ON
T
RA
IB
CAL

Fig. 12

44 2017-08-15 123198 08
1 Locate the main fuses in the fuse box in the power control
switch and check the voltage of the power control switch
(on/off switch (230V/115V)). If the voltage of the power
control switch differs from the line voltage, you must adjust
the voltage of the power control switch.
2 Open the lid of the fuse box using a screwdriver.

3 Remove the fuse box.

4 Remove both fuses and insert two new fuses. These must be
identical and should correspond to the line voltage.
• CTC-320/650: 115V, 10AF = 60B302 / 230V, 5AF = 60B301
• CTC-1200 A: 115V, 6.3AT = 60B313 / 230V, 3.15AT = 60B312

5 If the fuses blow immediately after you have replaced them,

the calibrator should be returned to the manufacturer for
service.
Slide the fuse box into place with the correct voltage turning
upwards.

7.1 Returning the calibrator for service

When returning the calibrator to the manufacturer for service, please

enclose a fully completed service information form. Simply copy the
form on the following page and fill in the required information.
The calibrator should be returned in the original packing.
Furthermore please follow the guidelines for transportation described
in chapter 5.0 – Storing and transporting the calibrator.

123198 08 2017-08-15 45
 Service info
Customer data: Date:

Customer name and address:___________________________________________

Attention and Dept.:___________________________________________________

Fax no./Phone no.:____________________________________________________

Your order no.:_______________________________________________________

Delivery address:_____________________________________________________

Distributor name:_____________________________________________________

Instrument data:

Model and Serial no.:__________________________________________________

Warranty claimed Yes:____ No:_____ Original invoice no.:_________________

___________________________________________________________________

Temp. Sensor Service request: This instrument is sent for

calibration input (please check off):

___ Calibration as left ___ Check

___ Calibration as found and as left ___ Service

___ Accredited calibration as left ___ Repair

___ Accredited calibration as found and as left.

___________________________________________________________________

Diagnosis data/cause for return:

Diagnosis/Fault description:_____________________________________________

___________________________________________________________________

Special requests:_____________________________________________________

___________________________________________________________________
Safety precautions: if the product has been exposed to any hazardous substances, it must be
thoroughly decontaminated before it is returned to AMETEK. Details of the hazardous
substances and any precautions to be taken must be enclosed.

46 2017-08-15 123198 08
8.0 Maintenance
8.1 Cleaning

Caution…
• Before cleaning the calibrator, you must switch it off,
allow it to cool down and remove all cables.
• The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause corrosion oxidation
on the insertion tube inside the instrument. There is a
risk that the insertion tube may get stuck if this is
allowed to happen.

Caution – Hot surface

Do not remove the insert from the calibrator before the insert
has cooled down to less than 50°C/122°F

Warning (all versions)

• Never leave hot insertion tubes that have been removed
from the calibrator unsupervised – they may constitute a
fire hazard or personal injury.
If you intend to store the calibrator in the optional
aluminium carrying case after use, you must ensure that
the instrument has cooled to a temperature below
100°C/212°F before placing it in the carrying case.

123198 08 2017-08-15 47
Users should/must carry out the following cleaning procedures as and
when required:

• The exterior of the instrument - Clean using water and a soft

cloth.
The cloth should be wrung out hard to avoid any water
penetrating the calibrator and causing damage.
The keyboard may be cleaned using isopropyl alcohol when
heavily soiled.

• The insertion tube - Must always be clean and should be

regularly wiped using a soft, lint-free, dry cloth.
You must ensure there are no textile fibres on the insertion tube
when it is inserted in the well. The fibres may adhere to the well
and damage it.
It is very important that humidity in the insertion tube is removed
to prevent corrosion and frost expansion damages.

• The well - Must always be clean. Dust and textile fibres should
be removed from the well using e.g. compressed air.

Warning
REMEMBER! Wear goggles when using compressed air!

It is very important that humidity in the well is removed to prevent

corrosion and frost expansion damages.

48 2017-08-15 123198 08
8.2 Adjusting and calibrating the instrument

You are advised to return the calibrator to AMETEK Denmark A/S or

an accredited laboratory at least once a year for calibration and
adjustment.

Alternatively, you can calibrate/adjust the calibrator yourself. You will

need a reference thermometer and a reference sensor with a
traceable certificate. Please follow the instructions given below.

Connect the calibrator to an external precision instrument (e.g. a DTI)

as shown in Fig. 13:

Fig. 13

Hold down the button while pressing the on/off power

control switch.

The instrument is now in adjustment/service mode.

123198 08 2017-08-15 49
 Press or to toggle between the different options:

⇑⇓

⇑⇓

⇑⇓

Press to accept your selection.

To exit the adjustment/service mode, switch the instrument
off and on again using the power control switch.

50 2017-08-15 123198 08
8.2.1 Adjusting the calibration date

Adjust the date by toggling through the available days, months and
years. Begin by selecting the required day as shown below:

Press or to select the required day in the interval 1-

31.

Press to accept your selection.

Press or to select the required month from JAN /

FEB / MAR / APR / MAY / JUN / JUL / AUG / SEP / OCT /
NOV / DEC.

Press to accept your selection.

Press or to select a year between 2001–2025.

123198 08 2017-08-15 51
 Press to accept your selection. The day will be

adjusted if necessary to ensure the legality of the date.
Finally, the day, month and year will flash:

Press to accept the date.

or

press to cancel the whole selection.

8.2.2 Calibrating/adjusting the instrument

The internal calibration/adjustment is a complex function which is

divided into a number of different steps:
The instrument will disclose the first calibration temperature by
displaying the text “TEMP.1 XXX°C” for approx. 1 second:

Calibration temperature for calibrators:

CTC-320 B 1. 50°C / 122°F

2. 120°C / 248°F
3. 180°C / 356°F
4. 250°C / 482°F
5. 320°C / 608°F

CTC-650 B 1. 50°C / 122°F

2. 200°C / 392°F
3. 350°C / 662°F
4. 500°C / 932°F
5. 650°C / 1202°F

52 2017-08-15 123198 08
CTC-1200 A 1. 50°C / 122°F
2. 300°C / 572°F
3. 600°C / 1112°F
4. 900°C / 1652°F
5. 1200°C / 2192°F

The instrument will now heat up/cool down to reach the first
calibration temperature:
°C

°C

Once the calibrator is stable, you need to enter the reference

temperature found using the reference thermometer. The
calibration temperature is suggested as a reference point:

°C

This procedure is repeated for TEMP.2, TEMP.3, TEMP.4 and

TEMP.5.
All five calibration temperatures and associated reference
temperatures have now been entered.

123198 08 2017-08-15 53
The instrument will now check whether the reference temperatures
which have been entered are within the permitted tolerances.
Permitted tolerances:
• CTC-320 B : ±0,15°C / 0.27°F
• CTC-650 B : ±0,35°C / 0.63°F
• CTC-1200 A: ±0,8°C / 1.44°F

If the instrument detects excessive deviations for one or more steps,

it will show a screen reading =ERR. in the top of the display. The text
AdJ. will flash in the bottom of the display to indicate that an
adjustment is required (accept by pressing ):

If the calibrator is found to be within the permitted tolerances, the

instrument will display the text =OK at the top of the display. The text
Cont. will flash in the bottom of the display to indicate that you may
continue without adjustments:

Press to cancel the adjustment function.

Press to go back to a previous screen and press

to repeat an adjustment step when it is shown on the display.

Press to toggle between AdJ. and Cont. on the display.

54 2017-08-15 123198 08
 Press when AdJ. is flashing to calculate a new set of

coefficients. Next, repeat the entire calibration/adjustment
procedure.

If the new coefficients deviate by more than 4% from the standard

values, the instrument will display an ERROR 2 in the display. The
calculated coefficients will be ignored:

Press to repeat the entire calibration/adjustment

procedure.

Press when Cont. is flashing to end the

calibration/adjustment procedure and enter a new calibration
date (see section 8.2.1).

123198 08 2017-08-15 55
9.0 Technical specifications
The illustrations below show the setup which forms the basis for the
technical specifications.

CTC-320/650 B

Fig. 14

56 2017-08-15 123198 08
CTC-320/650 B
Pos. Description
1 Calibrator

2 Ø4.2 mm insertion tube

3 Insulation 30 x 30 mm

4 Insulation tube for Ø4 mm sensor

5 Ø4 mm Pt 100 sensor with traceable certificate

6 DTI 1000 reference precision thermometer with traceable

certificate

123198 08 2017-08-15 57
CTC-1200 A

Fig. 15
58 2017-08-15 123198 08
CTC-1200 A
Pos. Description
1 Calibrator

2 Ø5.0 mm insertion tube

3 Cover

4 Insulation tube for Ø5 mm sensor

5 Ø5.0 mm thermocouple type R with traceable certificate

6 AMC 900 or multimeter incl. cold junction compensation

 Insulation plug

Thermal specifications 1

1 All specifications are given with an ambient temperature of 23°C/73.4°F

± 3°C/5.4°F
2 Specified at 115V / 230V

Specifications Model

CTC-320 B

Max. Temperature : 320°C/608°F

Min. Temperature : 50°C/122°F @ ambient temperature 40°C/104°F

33°C/91°F @ ambient temperature 23°C/73°F
10°C/50°F @ ambient temperature 0°C/32°F

Display resolution : 0.1°C/ 0.1°F

Stability : ±0.1°C/±0.18°F

Accuracy : ±0.5°C/±0.9°F

123198 08 2017-08-15 59
Specifications Model

Heating, 2 : 20 min.
23°C to max.

Time to stability : 8 min.

Cooling time
320 to 100°C / 608 to 212°F: 22 min.

CTC-650 B

Max. Temperature : 650°C/1202°F

Min. Temperature : 50°C/122°F @ ambient temperature 40°C/104°F

33°C/91°F @ ambient temperature 23°C/73°F
10°C/50°F @ ambient temperature 0°C/32°F

Display resolution : 0.1°C/ 0.1°F

Stability : ±0.05°C/±0.09°F

Accuracy : ±0.6°C/±1.08°F

Heating, 2 : 39 min.
23°C to max.

Time to stability : 8 min.

Cooling time
650 to 100°C / 1202 to 212°F: 65 min.

CTC-1200 A

Max. Temperature : 1205°C/2201°F

Min. Temperature : 300°C/572°F

Display resolution : 0.1°C/ 0.1°F

Stability : ±0.1°C/±0.18°F

Accuracy : ±2.0°C/±35.6°F

60 2017-08-15 123198 08
Specifications Model

Heating, 2 : 45 min.
23°C to max.

Time to stability : 20 min.

Cooling time
1205 to 300°C / 2200 to 572°F: 120 min.

123198 08 2017-08-15 61
Electrical specifications
Specifications Model

CTC-320 B
Power supply [VAC],
115VAC, 45-65Hz : 90-127
230VAC, 45-65Hz : 180-254

Power
consumption, [VA] : 600

Test voltage, : 5
switch test [V]

CTC-650 B
Power supply [VAC],
115VAC, 45-65Hz : 105-127
230VAC, 45-65Hz : 210-254

Power
consumption, [VA] : 1150

Test voltage, : 5
switch test [V]

CTC-1200 A
Power supply [VAC],
115VAC, 45-65Hz : 90-127
230VAC, 45-65Hz : 180-254

Power
consumption, [VA] : 725

Test voltage, : 5
switch test [V]

62 2017-08-15 123198 08
Mechanical specifications

Specifications Model

CTC-320 B

Weight : 7.0 Kg. / 15.5 Lbs.

Dimensions
HxWxL : 408 x 139 x 241 mm / 16.06 x 5.47 x 9.49 inch

Operating temp. : 0 - 40°C/ 32 - 104°F

Storage temp. : -20 - 50°C/ -4 - 122°F

Humidity range : 0-90% Rh

Protection class : IP10

Electromagnetic : Designed for use in basic and industrial

environment electromagnetic environment as defined in EN61326-1
: 2013

CTC-650 B

Weight : 10.5 Kg. / 23.0 Lbs.

Dimensions
HxWxL : 408 x 139 x 241 mm / 16.06 x 5.47 x 9.49 inch

Operating temp. : 0 - 40°C/ 32 - 104°F

Storage temp. : -20 - 50°C/ -4 - 122°F

Humidity range : 0-90% Rh

Protection class : IP10

Electromagnetic : Designed for use in basic and industrial

environment electromagnetic environment as defined in EN61326-1
: 2013

123198 08 2017-08-15 63
Specifications Model

CTC-1200 A

Weight : 12.0 Kg. / 26.5 Lbs.

Dimensions
HxWxL : 408 x 139 x 241 mm / 16.06 x 5.47 x 9.49 inch

Operating temp. : 0 - 40°C/ 32 - 104°F

Storage temp. : -20 - 50°C/ -4 - 122°F

Humidity range : 0-90% Rh

Protection class : IP10

Electromagnetic : Designed for use in basic and industrial

environment electromagnetic environment as defined in EN61326-1
: 2013

STANDARDS – ALL MODELS

The following standards are observed EN 61326-1: 2013: Electrical equipment
according to the EMC-Directive for measurement, control and laboratory
(2014/30/EU) use – EMC requirements.

The following standards are observed EN61010-1:2010 : Safety requirements for

according to the low voltage-directive electrical equipment for measurement,
(2014/35/EU) control and laboratory use, part 1: General
requirement
EN61010-2-030:2010 : Safety requirements
for electrical equipment for measurement,
control and laboratory use, part 2-03:
Particular requirements for testing and
measuring circuits

64 2017-08-15 123198 08
10.0 List of accessories
All parts listed in the list of accessories can be obtained from the
factory through our dealers.
Please contact your dealer for assistance if you require parts which
do not appear on the list.

List of accessories

Accessories Part no.

Fuse 115V, 6.3AT (CTC-1200 A) 60B313

Fuse 230V, 3.15AT (CTC-1200 A) 60B312
Fuse 115V, 10AF (CTC-320/650 B) 60B302
Fuse 230V, 5AF (CTC-320/650 B) 60B301
Alu. carrying case incl. carton (B-models / 1200 A) 123409
User manual 123199
Reference manual 123198
Tool for insertion tube 60F170
Heat protection shield 104216
Mains cable, 115V, US, type B 60F135
Mains cable, 240V, UK, type C 60F136
Mains cable, 220V, South Africa, type D 60F137
Mains cable, 220V, Italy, type E 60F138
Mains cable, 240V, Australia, type F 60F139
Mains cable, 230V, Europe, type A 60F140
Mains cable, 230V, Denmark, type G 60F141
Mains cable, 220V, Switzerland, type H 60F142
Mains cable, 230V, Israel, type I 60F143
Insulation tube, 100 mm 65-F100
Insulation tube, 150 mm 65-F101
Insulation tube, 200 mm 65-F102
Insulation tube, 250 mm 65-F103
Insulation tube, 300 mm 65-F104
Insulation tube, 350 mm 65-F105
Insulation tube, 400 mm 65-F106

123198 08 2017-08-15 65
List of accessories

Accessories Part no.

Insulation tube, 450 mm 65-F107

Insulation 30 x 30 mm (CTC-320/650 B only) 105173
Set of test cables 104203
Cleaning brush, 4 mm 122832
Cleaning brush, 6 mm 60F174
Cleaning brush, 8 mm 122822
Set of insulation plugs - 3, 4 mm + 1/8” (CTC-1200 A only) 124415
Set of insulation plugs - 5, 6 mm + 3/16”,
1/4” (CTC-1200 A only) 124416
Set of insulation plugs - 12 mm + 1/2” (CTC-1200 A only) 124414
Set of insulation plugs - 7, 8, 9 mm + 5/16”
(CTC-1200 A only) 124518
Set of insulation plugs - 10, 11 mm + 3/8”, 7/16”
(CTC-1200 A only) 124519
Certificate, National 99-C-T
RS232 serial cable 105366
JofraCal PC software 124915
Reference sensor Ø4.5 mm type N for CTC-1200 A 124528
Suspension holder for sensor (CTC 1200 A only) 124520

66 2017-08-15 123198 08
11.0 Standard insertion tubes

Caution…
To get the best results out of your calibrator, the insertion
tube dimensions, tolerance and material are critical. We
highly advise using the JOFRA insertion tubes, as they
guarantee trouble free operation. Use of other insertion
tubes may reduce performance of the calibrator and cause
the insertion tube to get stuck.

PART NO. FOR STANDARD INSERTION TUBES

Sensor CTC-320 B CTC-650 B CTC-1200 A
size
undrilled 60F356 60F420 124403
1/8” 60F358 60F422 124511
3/16” 60F360 60F424 124512
1/4” 60F362 60F426 124404
5/16” 60F364 60F428 124513
3/8” 60F366 60F430 124514
7/16” 60F368 60F432 124515
1/2” 60F370 60F434 124405
9/16” 60F372 60F436 -
5/8” 60F374 60F438 -
11/16” 60F376 60F440 -
13/16” 105184 60F444 -
3/4” 60F378 60F442 -
7/8” 60F377 60F446 -

123198 08 2017-08-15 67
 PART NO. FOR STANDARD INSERTION TUBES
Sensor CTC-320 B CTC-650 B CTC-1200 A
size
3 mm - - 124503
4 mm 60F359 60F423 124406
5 mm 123452 123460 124504
6 mm 60F361 60F425 124407
7 mm 123453 123461 124505
8 mm 105190 105195 124506
9 mm 105191 105196 124507
10 mm 105192 105197 124508
11 mm 105193 105198 124509
12 mm 105194 105199 124510
13 mm 123454 123462 -
14 mm 123455 123463 -
15 mm 123456 123464 -
16 mm 123457 123465 -
18 mm 123458 123466 -
20 mm 123459 123467 -

68 2017-08-15 123198 08
 AMETEK Sensors, Test & Calibration
A business unit of AMETEK Measurement &
Calibration Technologies Division offering the
following industry leading brands for test and
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www.ametekcalibration.com
United Kingdom USA Singapore
Tel +44 (0)1243 833 302 Florida Tel +65 6484 2388
caluk.sales@ametek.com Tel +1 (800) 527 9999 jofra@ametek.com
cal.info@ametek.com
France China
Tel +33 (0)1 30 68 89 40 California Shanghai
general.lloyd-instruments@ametek.fr Tel +1 (800) 444 1850 Tel +86 21 5868 5111
crystal@ametek.com
Germany Beijing
Tel +49 (0)2159 9136 510 India Tel +86 10 8526 2111
info.mct-de@ametek.de Tel +91 22 2836 4750 jofra.sales@ametek.com.cn
jofra@ametek.com
Denmark
Tel +45 4816 8000
jofra@ametek.com
Information in this document is subject to change without notice. ©2016, by AMETEK, Inc., www.ametek.com. All rights reserved.