Ametek JOFRA RTC-156 A User manual

Reference Manual
Reference Temperature Calibrator
JOFRA RTC-156/157/158/159/250/700 A/B/C

Reference Manual
Reference Temperature Calibrator
JOFRA RTC-156/157/158/159/250/700 A/B/C
Copyright 2012 AMETEK Denmark A/S

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About this manual….
The structure of the manual
This manual is divided into 10 chapters. These 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 that must be followed when
using the instrument, as well as any risks involved.
Warning
Conditions and actions that may compromise the
safe use of the instrument and result in
considerable personal injury or material damage.
Caution…
Conditions and actions that 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 ..............................................................................6
1.1Warranty ....................................................................................... 8
2.0Safety instructions...................................................................9
3.0Setting up the calibrator........................................................16
3.1 Receipt of the calibrator .......................................................... 16
3.2Preparing the dry-block calibrator............................................... 19
3.2.1When setting up the dry-block calibrator, you must…... 21
3.2.2Choice of insertion tube ................................................. 23
3.2.3 Inserting the sensors...................................................... 24
3.3Preparing the liquid bath calibrator (RTC-158/250 A/B/C only) . 26
3.3.1When setting up the liquid bath calibrator, you must… . 28
3.3.2Selection of fluids........................................................... 33
3.3.3Handling of lids .............................................................. 34
3.3.4Inserting the sensors...................................................... 35
3.4Programming intelligent sensors ................................................ 36
4.0Operating the Calibrator........................................................37
4.1Standard connections ................................................................. 37
4.2Input modules (B and C versions only)....................................... 39
4.3Keyboard and main screen display overview ............................. 41
4.3.1Main screen display information .................................... 44
4.3.2Main screen temperature values ................................... 46
4.3.3Stability of temperature values ...................................... 46
4.4Operating principle...................................................................... 47
4.4.1Horizontal Menu............................................................. 47
4.4.2Vertical Menu ................................................................. 48
4.4.3Parameter Fields............................................................ 49
4.4.4Working with lists ........................................................... 51
4.5Starting the calibrator.................................................................. 54
4.6Setting the temperature .............................................................. 55
4.7Calibration................................................................................... 55
4.7.1Running a calibration ..................................................... 57
4.7.2Viewing calibration results ............................................. 61
4.7.3Displaying calibration information .................................. 62
4.7.4Deleting workorders ....................................................... 64
4.8Switch test menu ........................................................................ 65
4.8.1Running a switch test..................................................... 66
4.8.2Showing switch test results............................................ 68
4.9Auto step menu........................................................................... 72

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4.9.1Running an Auto step calibration................................... 72
4.9.2Auto Step test results..................................................... 75
4.10Sensor Setup menu .................................................................... 77
4.10.1Setting the additional stability time (A version).............. 77
4.10.2Setting the parameters for TRUE – reference sensor (B
and C versions only) ...................................................... 78
4.10.3Setting the parameters for DLC– dynamic load
compensation (B and C versions only).......................... 80
4.10.4Setting the parameters for SUT– Sensor under test (B
versions only)................................................................. 80
4.10.5Viewing the Reference and DLC data (B and C versions
only) ............................................................................... 83
4.11Calibrator Setup menu................................................................ 85
4.11.1Setting the temperature parameters .............................. 85
4.11.2Setting the temperature resolution................................. 87
4.11.3Setting the sound, volume and operating mode ............ 88
4.11.4Setting calibration interval.............................................. 89
4.11.5Changing the date and time........................................... 89
4.11.6Saving a setup ............................................................... 90
4.11.7Loading a setup ............................................................. 91
4.11.8Resetting the instrument setup to factory defaults ........ 92
4.11.9Network Configuration (for service use only)................. 92
4.12Selecting the stirrer speed (RTC-158/250 A/B/C only)............... 93
4.13Information Screen ..................................................................... 94
4.14About the calibrator..................................................................... 95
4.15Simulation or training .................................................................. 95
5.0After use..................................................................................97
5.1Storing and transporting the calibrator ....................................... 97
5.1.1Transporting the dry-block calibrator ............................. 99
5.1.2Transporting the liquid bath calibrator ......................... 100
5.2Emptying the well (liquid baths only) ........................................ 100
6.0Replacing the main fuses....................................................102
6.1Error messages ........................................................................ 103
6.2Returning the calibrator for service........................................... 105
7.0Maintenance..........................................................................108
7.1Cleaning.................................................................................... 108
7.2Adjusting and calibrating the instrument................................... 110
7.3Maintenance of STS-reference sensor..................................... 111
7.4Maintenance of DLC-sensor..................................................... 113
8.0Technical specifications......................................................114

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9.0List of accessories...............................................................166
10.0Standard insertion tubes.....................................................169

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1.0 Introduction
Congratulations on your new AMETEK JOFRA RTC
Calibrator!
With this 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 are 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 RTC-156 A - Temperature calibrator
JOFRA RTC-156 B - Temperature calibrator with sensor and
reference inputs
JOFRA RTC-156 C - Temperature calibrator with reference input
JOFRA RTC-157 A – Temperature calibrator
JOFRA RTC-157 B – Temperature calibrator with sensor and
reference inputs
JOFRA RTC-157 C - Temperature calibrator with reference input
JOFRA RTC-158 A – Temperature calibrator
JOFRA RTC-158 B – Temperature calibrator with sensor and
reference inputs
JOFRA RTC-158 C - Temperature calibrator with reference input
JOFRA RTC-159 A – Temperature calibrator
JOFRA RTC-159 B – Temperature calibrator with sensor and
reference inputs
JOFRA RTC-159 C - Temperature calibrator with reference input
JOFRA RTC-250 A – Temperature calibrator
JOFRA RTC-250 B – Temperature calibrator with sensor and
reference inputs
JOFRA RTC-250 C - Temperature calibrator with reference input
JOFRA RTC-700 A - Temperature calibrator
JOFRA RTC-700 B - Temperature calibrator with sensor and
reference inputs
JOFRA RTC-700 C - Temperature calibrator with reference input

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Model
A
Model B
LC
Model C
LC
ISO-9001 certified
AMETEK Denmark A/S was ISO-9001 certified in September 1994
by Bureau Veritas Certification Denmark.
CE-label
Your new calibrator bears the CE label and conforms to
the EMC Directive and the Low-voltage Directive.
Technical assistance
Please contact the dealer from whom you acquired the instrument if
you require technical assistance.

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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!
In order to avoid any personal injuries and/or damage to
the instrument all safety instructions and warnings must be
observed.
The screen menus shown in this manual represent the
menus displayed when using a B-version.
Disposal – WEEE Directive
These calibrators contain Electrical and Electronic circuits
and must be recycled or disposed of properly (in
accordance with the WEEE Directive 2002/96/EC).
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.

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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 free 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 in the dry-block calibrator and cleaning oil in the
liquid bath calibrator.
Use protection shield when calibrating at high
temperatures (RTC-700)
The RTC-159 contains R-1270 and R-704 under
pressure. The calibrator must under no
circumstances be stored at ambient temperatures
above 50°C ( 122°F) or operated at ambient
temperatures above 40C (104F). Doing so may cause
a hazard.
About the front panel:
For B and C versions only, the sockets on the input
module must NEVER be connected to voltages
exceeding 30V with reference to ground.

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Thermostats must not be connected to any other
voltage sources during test.
About insertion tubes, insulation plugs, well and
sensor:
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
carrying case after use, you must ensure that the
instrument has cooled down 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.
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.
About the liquid bath (RTC-158/250 A/B/C only):
For liquid bath ensure that the sensor is absolutely
clean and dry as a few drops of water in the well (liquid
baths) might cause a steam explosion.
Do not pour cold fluid into a hot well – it might cause
an explosion.
AMETEK Denmark A/S does not take any
responsibility, if the well is filled with other fluids than
those recommended.
Liquid baths should only be operated by trained
personal.
Heat transfer fluids must only be used in calibrators
prepared as a liquid bath. If these fluids are heated
above specified temperature they will create noxious or

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toxic fumes. Proper ventilation must be used.
To avoid hazards from treating fluids in a wrong manner,
always reduce the "Max. SET-temperature allowed” in
the CALIBRATOR SETUP MENU according to the
specifications of the fluid to be used.
If using a calibrator outside of the fluids specifications
there is a risk of fire hazards, personal Injury or chemical
release.
By reducing the "Max. SET-temperature allowed”, the
calibrator cannot be used outside this temperature
range.
Be aware of the flash point, the boilling point and other
fluid properties applicable to the usage when setting the
Max. SET-temperature. Read the MSDS (Material
Safety Data Sheet) of the liquid before use.
Always remove the liquid from the calibrator before
transportation.
Product information on the fluid must be carefully
investigated before use.
Do not handle hot fluid.
If the oil is heated beyond the flash point, it may
constitute a fire hazard.
Do not pour water or any other fluids into a bath filled
with hot oil, because only a few drops of water might
cause a steam explosion, if poured into above 100°C
hot oil.
Do not under any circumstances pour water on burning
oil. It might cause a dangerous steam explosion.
Caution – Hot surface
This symbol is engraved in 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 lid or the spill tray when the calibrator
is heating up – they may be very hot and cause burns
(RTC-158/250 A/B/C only).

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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 RTC-156/157/158/159
A
/B/C 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 on the well. This, in turn, may cause the material
surfaces to oxidize.
To prevent this from happening, the insertion tube and
the well must be dried. This is done by heating up the
calibrator to min. 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.

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Caution…
About the use:
Do not use the instrument if the internal 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 liquid bath (RTC-158/250 A/B/C only):
Be careful not to overfill the well with oil.
Avoid getting silicone oil on the clothes. It is impossible
to wash off.
The oil level rises several centimetres when the
temperature is rising. Please read instructions in
section 3.3.2 about oil level. To stop overflow switch off
the main power and the oil level will decrease when
cooled down.
Carefully wipe off all silicone oil from the sensor under
test to avoid spreading of the silicone oil.
Be careful to select the right oil for the right task. Using
other than the recommended oils might cause damage
to the calibrator or degrade the performance.
Remove excess hot fluid with the outmost care, as it
might be very hot.
Do not attempt to remove hot fluid with the liquid
drainage tube, as it might melt.
About the well, insertion tube and sensor:
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.
Do not use any alkali, acid or ionic fluids in the
aluminium well as it might be damaged.
Scratches and other damage to the insertion tubes
should be avoided by storing the insertion tubes
carefully when not in use.

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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 – 250°C (482°F) / 700°C (1292°F) - for a
period of minimum 30 minutes (RTC-250/700 A/B/C
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.
The tip of the sensor should rest at the bottom of the
sensor basket for optimum results (liquid baths only).
Be careful not to submerge the handle or wire inlet of
the sensor-under-test in the fluid, as this might damage
the sensor (liquid baths only).
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 unauthorized 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 against the list shown below.
If any of the parts are missing or damaged, please contact the
dealer who sold the calibrator.
You should receive:
1 calibrator
1 mains cable
2 sets of test cables (2 black, 2 red –
B versions only)
1 USB key containing software package
“JOFRACAL” and reference manual
1 USB cable
1 tool for insertion tube

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1 traceable certificate (A versions)
2 traceable certificates (C versions)
3 traceable certificates (B versions)
1 set of rubber cones for insulation plugs
(RTC-156/157/158/159/250 only)
1 insulation collar (RTC-156 only)
1 heat shield (RTC-700 only)
Caution
Do not use the RTC-158 insulation plug (black POM) with
the RTC-250 instrument due to the risk of melting.
Always use the correct - yellow/brown PEEK - insulation
plug with the RTC-250 instrument.
Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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Calibration Certificate
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Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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Calibration Certificate
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Calibration Results
Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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Calibration Certificate
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Calibration Results
Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability Calibration Procedure
CALIBRATIONINSTRUMENTS
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18 2014-07-30 127139 13
RTC-158/250 A/B/C only (liquid bath) - OPTIONAL
1 liquid bath kit consisting of :
-1 sensor basket
-2 lids for transportation / calibration
-1 stirring magnet
-1 stirring magnet remover
-1 liquid drainage syringe
-1 bottom shield
-1 silicone oil
-1 oil material safety data sheet
When reordering, please specify the part numbers found in the list of
accessories, chapter 9.0.
Optional parts can also be found in the list of accessories.
Dow corning
Material data sheet
Oil

127139 13 2014-07-30 19
3.2 Preparing the dry-block calibrator
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.
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 free within an area of 20
cm on all sides and 1 metre above the calibrator due to
fire hazard.