Ametek Jofra CTC-155 A/C User manual

User Manual
Compact Temperature Calibrator
Jofra CTC-155/350/660/1205 A/C

User Manual
Compact Temperature Calibrator
JOFRA CTC-155/350/660/1205 A/C
Copyright 2016 AMETEK Denmark A/S

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List of contents
1.0 Introduction ...................................................................................................................3
1.1 List of equipment received………………………………………………………………………… 3
2.0 Safety instructions........................................................................................................4
3.0 Setting up the calibrator...............................................................................................7
3.1 Before use……………………………………………………………………………………….….. 7
3.2 Keypad - Functions………………………………………………………………………………….9
3.3 Display…………………………………………………………………………………………….. 10
3.4 Connections……………………………………………………………………………………… 11
3.5 Stability of temperature values……………………………………………………………………11
4.0 Operating the calibrator..............................................................................................13
4.1 Operating principle…………………………………………………………………………………13
4.2 System menu……………………………………………………………………………………….13
4.3 Starting the calibrator…………………………………………………………………………….. 15
4.4 Selecting a TRUE – reference sensor (C-models only)………………………………………. 16
4.5 Stability setting……………………………………………………………………………………. 17
4.6 Selecting the set-temperature…………………………………………………………………… 17
4.6.1 Editing the preset set-temperature…………………………………………………….. 18
4.7 Auto Step function………………………………………………………………………………….19
4.7.1 Running an Auto Step test………………………………………………………………..19
4.7.2 The calibrator's Auto Step procedure……………………………………………………20
4.8 Switch Test function……………………………………………………………………………….21
4.8.1 Running a Switch Test…………………………………………………………...............21
4.8.2 The calibrator's Switch Test procedure………………………………………………....22
5.0 Setting the mains voltage and replacing the main fuses.........................................24
5.1 Replacing the main fuses……………………………………………………………..…………..24
6.0 After use.......................................................................................................................25
6.1 Storing and transporting the calibrator…………………………………………………………..25
6.2 Switching off the calibrator………………………………………………………………………..26

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1.0 Introduction
CTC-calibrators are temperature calibrators designed to calibrate temperature sensors and
temperature switches.
Read this manual carefully before using the instrument and make sure that all safety
instructions and warnings are observed.
1.1 List of equipment received
When you receive the instrument, the following should be enclosed:
•1 calibrator
•1 USB memory stick containing electronic Reference manual and software package
JOFRACAL
•1 mains cable
•1 set of test cables (1 black, 1 red)
•1 thermal protection shield (CTC-660 only)
•1 tool for insertion tube
•1 USB cable
•1 Calibration certificate (International traceable)

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2.0 Safety instructions
Read this manual carefully before using the instrument!
In order to avoid any personal injuries and/or damage to the instrument all safety
instructions and warnings must be observed.
Disposal
– WEEE Directive
These calibrators contain Electrical and Electronic circuits and must be recycled or
disposed of properly (in accordance with the WEEE Directive 20
12/19/EU).
Warning
About the use:
•The calibrator must not be used for any purposes other than those described in
this manual, as protection provided by the calibrator may be impaired and 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
(CTC-155/350/660) / 3000 m (CTC-1205).
•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.
•Always make sure to position the power cord and other connected cables in a
secure way to prevent the risk of personnel falling.
•To prevent the calibrator from tipping over and causing damage to equipment or
systems, please avoid pulling the cables connected to the calibrator.
•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 insertion tube, REMEMBER to wear goggles when
using compressed air!

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•Remember to use appropriate protective equipment or get help when carrying
the calibrator (for a longer distance) in order to prevent injuries from dropping the
calibrator.
About the front panel:
•The connectors, on the front panel of the calibrator, must NEVER be connected
to a voltage source.
•Thermostats connected to the switch test input must not be connected to any
other voltage source during a test.
About the insertion tubes and insulation plug:
•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 down to a temperature
below 50°C/122°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-1205
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 visible on the grid plate.
•Do not touch the grid plate, the well or the insertion tube when 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.
Caution – Cold surface
Below 0°C/32°F (applies only to the CTC-155 models)
•Do not touch the well or insertion tube when these are below 0°C/32°F - they
might create frostbite.
•If the calibrator has reached a temperature below 0°C/32°F, ice crystals may form
on the insertion tube and the well. This, in turn, may cause the material surfaces
to oxidize

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To prevent this from happening the insertion tube and the well must be dried.
This is done by heating up the calibrator to 100°C/212°F until all water left has
evaporated.
Remove the insulation plug while heating up.
It is very important that humidity in the well and insertion tube is removed to
prevent corrosion and frost expansion damages.
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 and dry before use.
•Do not pour any form of liquids into the well. It might damage the well or cause a
hazard.
•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 350°C(662°F) / 660°C (1220°F) / 1205°C
(2201°F) for a period of minimum 30 minutes (CTC-350/660/1205 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
-
1205 the ceramic well might crack.
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
ENVIRONMENTAL SPECIFICATIONS
Ambient operating temperature range: 0-50°C / 32-122°F
Storage temperature range: -20-50°C / -4-122°F
Humidity range: 5-90% RH, non-condensing
IP protection class: IP10
Altitude: 0-2000 m / 0-3000 m (CTC-1205 only)
Electromagnetic Compatibility: Tested for use in domestic establishment and in
establishments directly connected to low voltage
power supply network which supplies buildings
used for domestic purposes as well as in an
industrial electromagnetic environment as
described in EN61326-1:2013.
POWER SUPPLY SPECIFICATIONS
Line voltage/frequency: 90-127VAC / 180-254VAC 47-63 Hz
IEC protection class: Class I
Power consumption: CTC-155 A/C: 140 VA max.
CTC-350 A/C: 1150 VA max.
CTC-660 A/C: 1150 VA max.
CTC
-
1205 A/C:
650
VA max.
3.1 Before use
Warning
•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
(CTC-155/350/660) / 3000 m (CTC-1205).
•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.

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•Always make sure to position the power cord and other connected cables in a
secure way to prevent the risk of personnel falling.
•To prevent the calibrator from tipping over and causing damage to equipment or
systems, please avoid pulling the cables connected to the calibrator.
•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 connectors, on the front panel of the calibrator, must NEVER be connected
to a voltage source.
•Thermostats connected to the switch test input must not be connected to any
other voltage source during a test.
•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 kept clear within an area of 20 cm on all sides and 1
metre above the calibrator due to fire hazard.
•Use only insulation plugs supplied by AMETEK Denmark A/S.
•Never try to modify the insulation plugs to make them fit the sensor (CTC-1205
only)
Caution – Hot surface
This symbol is visible on 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 handle of the calibrator during use – it may be very hot and
cause burns
.
When setting up the calibrator, you must… (cf. figure next page):
1. Place the calibrator on an even horizontal surface where you intend to use it and away
from all draughts. 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.
Caution…
Do not use the instrument if the internal fan is out of order .
2. Ensure a free supply of air to the internal fan located at the bottom of the instrument
(pos. 1). The area around the calibrator should be free of draught, dirt, flammable
substances etc.
3. Check that the fuse size corresponds to the applied voltage on (pos. 2). The fuse is
contained in the power control switch (on/off switch (230V/115V)).
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.

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4. Check that the earth connection for the instrument is present and attach the cable.
5. Place the sensor (pos. 3) in the insertion tube (pos. 4) as shown in the figure below.
Caution…
Before using new insertion tubes for the calibration in the CTC-350/660/1205
instruments the insertion tubes must be heated up to maximum temperature
350°C(662°F) /
660°C (1220°F)
/ 1205°C (2201°F)
for a period of minimum 30 minutes.
6. In order to protect the sensor and its connections use the thermal protection shield
(129264 – pos. 5) at high temperatures (CTC-660 only).