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Reference Manual
Reference Temperature Calibrator
JOFRA RTC-156/157/158/159/250/700 A/B/C
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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 multilingual 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
4.10Sensor 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
4.11Calibrator 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
4.12Selecting the stirrer speed (RTC-158/250 A/B/C only) ............... 93
4.13Information Screen ..................................................................... 94
4.14About the calibrator ..................................................................... 95
4.15Simulation 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 40C (104F). 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
CALIBRATION INSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability
Calibration Procedure
CALIBRATION INSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability
Calibration Procedure
CALIBRATION INSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability
Calibration Procedure
CALIBRATION INSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability
Calibration Procedure
CALIBRATION INSTRUMENTS
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Calibration Certificate
Calibration Equipment
Calibration Results
Calibration Conditions
Calibration Traceability
Calibration Procedure
CALIBRATION INSTRUMENTS
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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
O
i
l
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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.
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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 40C
(104F). Doing so may cause a hazard.
Note…
The instrument must not be exposed to draughts.
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Fig. 1
3.2.1 When setting up the dry-block calibrator, you must…
Place the calibrator on an even horizontal surface where you
intend to use it.
Caution…
Do not use the instrument if the internal fan is out of
order.
Ensure a free supply of air to the internal fan located at the
bottom of the instrument.
The area around the calibrator should be free of draught, dirt,
flammable substances, etc.
2
4
3
5
1
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Check that the fuse size corresponds to the applied voltage
on The fuse is contained in the power control switch (on/off
switch To check do as follows (see fig. 1):
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 chapter 9.0.
B. Slide the fuse box back into place.
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 3.2.2 for information on how to select insertion tubes.
The calibrator is now ready for use.
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3.2.2 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 calibration in the RTC-
250/700 instruments, 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.
Insertion tubes are selected on the basis of the diameter of the sensor
to be calibrated.
Use the table for insertion tubes in chapter 9.0 to find the correct part
number.
Alternatively, you may order an undrilled insertion tube and drill the
required hole yourself. The finished dimensions should be as follows:
Sensor diameter +0.2mm
+0.05/-0
DLC hole : Ø3.1mm
+0.05/-0 (RTC-156/157/158/159/250 A/B/C)
Ø4.2mm
+0.05/-0 (RTC-700 A/B/C)
Reference sensor holes : Ø4.2mm
+0.05/-0 and Ø6.55mm +0.05/-0
For RTC-156/157/158/159 A/B/C only:
In order to get optimum results and prevent ice from building up in the
well of the cooling calibrators, a proper sized insulation plug must
be placed over the well during the calibration process.
The holes in the plug must have a tight fit and unused holes must be
covered using e.g. silicone plugs (spare part no. 126280).
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3.2.3 Inserting the sensors
Before inserting the sensors 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 calibrators. These fluids may
penetrate the calibrator and cause electrical hazard,
damage or create poisonous fumes.
Insert the sensors as shown in fig. 2.
Fig. 2
The DLC sensor must be placed in the hole that is intended for the
DLC sensor. Standard insertion tubes from AMETEK Denmark are
Reference sensor
(if available)
Sensor under test
DLC sensor
(if available)
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127139 13 2014-07-30 25
marked with a dot on the rim to indicate the placement of the DLC hole,
and the insulation plugs are marked with the letter D (RTC156/157/158/159/250 A/B/C only). See fig. 3.
Fig. 3
Caution…
The well and the insertion tube must be clean before
use.
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 while 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 – it may be very hot and cause
Dot indicating placement
of the DLC hole
D indicating placement
of the DLC hole
Insulation plug
Insertion tube
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26 2014-07-30 127139 13
burns.
Do not touch the handle of the calibrator during use –
it may be very hot and cause burns.
Do not remove the insert from the calibrator before the
insert has cooled down to less than 50°C/122°F.
Caution – Cold surface
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.
Do not touch the well or insertion tube when these are
below 0°C/32°F – they might create frostbite.
3.3 Preparing the liquid bath calibrator (RTC158/250 A/B/C only)
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
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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).
Liquid baths should only be operated by trained
personal.
AMETEK Denmark A/S does not take any
responsibility, if the well is filled with other fluids than
those recommended.
Heat transfer fluids must only be used in calibrators
with a liquid bath. If these fluids are heated above
specified temperature they will create noxious or toxic
fumes. Proper ventilation must be used.
Product information on the fluid must be carefully
investigated before use.
The calibrator must be kept free within an area of 20
cm on all sides and 1 metre above the calibrator due to
fire harzard.
Note…
The instrument must not be exposed to draughts.
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Fig. 4
3.3.1 When setting up the liquid bath calibrator, you must…
Place the calibrator on an even horizontal surface where you
intend to use it. Place it in a way that will minimize the risk of
tilting.
Caution…
Do not use the instrument if the internal fan is out of
order.
The well must be clean before use.
Reference sensor
(if available)
1
2
4
5
7
9
3
6
8
O
i
l
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Ensure a free supply of air to the internal fan located at the
bottom of the instrument.
The area around the calibrator should be free of draught, dirt,
flammable substances, etc.
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 setting of
the power control switch as follows (see fig. 4):
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 and insert two new fuses.
These must be identical and should correspond to the
line voltage. See chapter 9.0.
B. Turn the fuse box 180° and slide it into place.
Check that the earth connection for the instrument is present
and attach the cable.
Place the parts from the liquid bath kit in the well in the
following order:
Bottom shield – It is very important that the bottom
shield is placed in the well before any calibration is
attempted, as the bottom shield protects the well from
being damaged during calibration.
Stirring magnet – It is very important that the stirring
magnet is in place and spinning before any calibration is
attempted. The stirring magnet ensures minimum
temperature gradient in the fluid. The magnets teflon
cover will over time be worn down, leaving the magnet
flat on one side. This will reduce the spinning ability. A
magnet with a flat side must therefore be replaced.
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Sensor basket – It is very important to place the sensor
basket in the well, as it ensures that the sensors
encounter maximum temperature stability and ensures
that the stirring magnet is not blocked.
Silicone oil – Fill the well with oil according to the
tables of recommended oil volume. The recommended
volumes must be adjusted to the actual job.
For oil tables and further oil information – see section
3.3.2.
The sensor basket is marked with an optimum fluid level
mark (100%). When filling the well with fluid and placing
the sensors, this mark must never be exceeded.
Warning
Do not pour cold fluid into a hot well – it might cause an
explosion.
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 e.g. above 100°C
hot oil.
Always remove the liquid from the calibrator before
transportation.
Caution…
Do not use any alkali, acid or ionic fluids in the aluminium
well as it might be damaged.
Be careful not to overfill the well with oil.
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.
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
syringe, as it might melt.
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Start the stirring magnet by following the procedure in section
4.12.
Place the calibration lid onto the well. See section 3.3.3 for
drilling information.
Warning
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.
Select a SET-temperature according to the tables of
recommended oil volume by following the procedure in
section 4.6.
Warning
Ensure that the sensor is absolutely clean and dry, as a few
drops of water might cause a steam explosion.
Place the sensor to be calibrated vertically into the well. It is
recommended to use the optional support rod set for a
correct position during calibration. See fig. 5.
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Fig. 5
Caution…
The tip of the sensor should rest at the bottom of the
sensor basket for optimum results.
Be careful not to submerge the handle or wire inlet of the
sensor-under-test in the fluid, as this might damage the
sensor.
The calibrator is now ready for use.
Support rod set
Sensor under test
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3.3.2 Selection of fluids
Caution…
Be careful to select the right fluid for the right task. Using
other than the recommended fluids might cause damage to
the calibrator or degrade the performance.
AMETEK Denmark A/S recommends DOW CORNING 200(R) oil 10cSt
for sub zero temperatures to 158°C and DOW CORNING 200(R) oil
50cSt for ambient temperature to 250°C. Technical specifications for
the liquid baths has been produced using the fluids mentioned above.
For proper handling, use and disposal of fluid – read fluid product
information. When reading this information pay special attention to
details regarding fume point, flash point, boiling point and point of
decomposition.
When the fluid temperature approaches the fume point, it is necessary
to use proper ventilation. An exhaust hood is recommended. When
ventilation is applied take care not to expose the calibrator to
alternating draft, as it might influent the temperature stability. If
possible make the ventilation flow as constant as possible.
At low temperatures the viscosity of the fluid can constitute a problem.
When the viscosity becomes to low, the stirring magnet can’t provide
proper circulation in the well to maintain temperature uniformity.
Therefore it is essential to investigate the physical property of the fluid
before one is selected.
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Tables of recommended oil level @23°C well temperature
RTC-250 A/B/C RTC-158 A/B/C
For recommended
50 cSt oil
For recommended
10 cSt oil
0°C - 50°C
100%
-20°C - 50°C 100%
50°C - 100°C 95%
50°C - 100°C 95%
100°C - 150°C 90%
100°C - 120°C 90%
150°C - 200°C 85%
120°C - 155°C 85%
200°C - 250°C 80%
For the best result, the oil should be in good condition and free of
foreign objects. If water is accumulated in the oil due to melted ice
crystals – the oil must be dried out, by heating it up.
Warning
Do not handle hot fluid.
If the fluid is heated beyond the flash point, it may
constitute a fire hazard.
If the fluid has caught fire, switch off the main power to prevent further
heating of the fluid. Flames are best extinguished by cowering the well
with a non-flammable lid.
Warning
Do not under any circumstances pour water on burning oil. It
might cause a dangerous steam explosion.
3.3.3 Handling of lids
It is strongly recommended to leave the lid on during calibration.
Calibration without the lid may affect the temperature stability and
homogeneity.
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To be able to use the lid for calibration, holes must be drilled in to it, in
order to fit your calibration needs. If you use many different sizes of
sensors more lids can be purchased at your JOFRA supplier.
It is advisable to drill the holes at the same size as the sensors plus
0,5mm and distribute the holes evenly over the lid.
3.3.4 Inserting the sensors
Be sure that the sensors can be calibrated in fluid. E.g. certain ceramic
sensors might be destroyed.
Caution…
The well and the insertion tube must be clean before
use.
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.
Carefully wipe off all silicone oil from the sensor-under-
test to avoid spreading of the silicone oil.
Caution – Hot surface
Do not touch the lid or the spill tray 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 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.
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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3.4 Programming intelligent sensors
Use the configuration software CON050 supplied with RTC to program
and to update calibration information in intelligent sensors.
For instructions read the software manual for CON050 installed on the
USB key.
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4.0 Operating the Calibrator
4.1 Standard connections
Communication connections (all versions)
Fig. 6
Pos.
Description
1
SD-card: SD/MMC card slot
2
Ethernet: Ethernet MAC 10/100 base-T, RJ45
3
Sync.: Sync. Relay output, 3.5 mm Mini Jack
4
Host: USB 2.0 Double Host Port, 2 x USB A
5
Device: USB 2.0 Device Port, 1 x USB B
H
O
S
T
D
E
V
I
C
E
H
O
S
T
D
E
V
I
C
E
11
2
3
4
5
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Standard connections (all versions)
Fig. 7
Pos. Description
1 Power control switch with a cable connection and on/off
switch. It also contains the main fuse. See section 6.0 for
information on how to change the fuses.
2 Label indicating fuse value
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4.2 Input modules (B and C versions only)
Warning
The input terminals must NEVER be connected to
voltages exceeding 30V with reference to ground.
Description of sockets for external connections
Fig. 8
Pos. Description
3 Input for reference sensor (B and C versions)
4 Input for DLC sensor (B and C versions)
5 Connection for thermostat switch test (B-version)
Note that this connection is for voltage free switches
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Pos. Description
6
24V supply for active mA input (B-version)
7
Passive mA input (B-version)
8
Voltage input (B-version)
9
Connection to chassis (earth/ground) (B-version)
10
TC connection for thermocouples (B-version)
11
Input for RTD sensor (2, 3 or 4 wire) (B-version)
One of the inputs either pos. 7, 8, 10 or 11
can be selected displaying
the “SENSOR” temperature in the Setup and pos. 3 can be displayed
as “TRUE” temperature.
Note: Only the sensor type, which is to be tested, should be connected
to the input panel.
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4.3 Keyboard and main screen display overview
Keyboard
Fig. 9
Keys Description
Full colour VGA display (main screen display information –
see section 4.3.1)
NUMERIC KEYS to select menu options displayed in the
horizontal and vertical menus and to type in values
BACK KEY to cancel a selection/edit or return to previous
menu.
MENU KEY shows the vertical menu options listed. Can be
displayed all through the process
DELETE KEY deletes previous character
ENTER KEY accepts selected options or entered values.
When a value is entered with the ENTER KEY the cursor
selects the next value field in the list.
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Keys Description
ARROW KEYS have different functions depending on the
mode of operation.
In navigation mode, they move the cursor in the desired
direction.
In edit mode they roll in the list of options or if entering a
number, the ARROW left and ARROW right move the
cursor one character in the desired direction
ACTION KEY opens and closes edit fields or a menu
button. The action key also accepts the selected option or
entered value.
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Main screen display
Fig. 10
The Main screen display is divided into four separate areas:
Pos.
Description
1
Heading: Informs you of the current menu selected.
2
Setup field: Provides the bulk of setup data in the menu. This
data can be changed by moving the cursor to the various
fields.
3
Horizontal menu: Provides you with the relevant menu
options that can be selected at the present point. Each option
can be activated either by selecting and activating the option
– or simply by pressing the numeric key that corresponds to
the option number.
4
Readings: This reading line is always visible and informs you
of the current readings.
5
Vertical menu: This menu can be activated throughout the
entire calibration. The menu can be switched on and of in all
stages of operating the calibrator.
1
2
3
4
5
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4.3.1 Main screen display information
The main screen gives an overview of the calibrator status and reads
out the most relevant readings. In the Sensor Setup menu (see section
4.10) these readings can be changed.
Fig. 11
Pos. Description
1 True temperature reading. Can be either the internal
reference sensor or an external reference sensor.
2 SENSOR. Sensor Under Test value.
3 DLC sensor reading. Displays the measured temperature
load of the insert –if the load compensation is active, the
DLC system will control this value towards 0.00°C.
4 DLC compensation activated. The icon indicates, that the
Dynamic Load Compensation function is active
5 READ value. The internal reference is always displayed as
READ value.
6 Reference Sensor Info. The serial number of the external
reference sensor is read from the intelligent reference
sensor and displayed in this field.
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Pos. Description
7 Set follows True activated. The icon indicates, that the Set
follows True function is active and will control the
Temperature of the external reference sensor to the SET
temperature.
8 Sensor Under Test Type.
9 SET temperature.
10 Stability indicator displays the status of the True
temperature stability. Yellow symbol indicates that stability
is not yet obtained. A timer counts down. A green symbol
indicates that the stability criteria are obtained and the time
of stability is displayed. When time of stability is more than
99 min., the time is no longer displayed in the symbol, but
only in the info screen (see section 4.13).
11 Sensor Under Test Stability indicator. If Sensor under Test
stability criteria is selected, a symbol will indicate the
stability of the sensor under test as well as the True
sensor. When both Sensor Under Test and True sensor
are stable, the calibrator is considered being stable.
12 Real Time Clock display.
13 SET reading always visible.
14 READ value always visible.
15 TRUE value always visible.
16 SENSOR value always visible.
17 WARNING/ERROR symbol. The yellow icon indicates a
warning. The red icon indicates an error. When the error
symbol is displayed the calibration results cannot be saved.
See section 6.1 for details concerning warnings and errors.
18 Stirrer activated/speed indicator. The icon indicates that
the stirrer is activated and how fast it is spinning.
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4.3.2 Main screen temperature values
Two temperatures are always displayed:
TRUE temperature: This is the reference temperature of the
calibrator. In the A-version this is always the internal reference
sensor. In B- and C-versions the TRUE temperature can either be
the internal reference or the external reference.
SET temperature: This is the target temperature for the well. SET
temperature displays the last value entered. If no value has been
entered previously, "---,---" is displayed.
Additional temperatures displayed (B versions only):
SENSOR temperature: This is the temperature measured by the
sensor under test (SUT).
Additional temperatures displayed (B and C versions only):
Ext. TRUE temperature: This is the temperature measured by an
external reference sensor. This is only displayed when an external
reference sensor is used and replaces the internal reference.
4.3.3 Stability of temperature values
The stability of the TRUE and SENSOR temperatures are indicated by
the following messages:
"Not stable": Indicates that the measured temperature is not
yet within the specified stability criteria.
Indicates "Time to stable": The temperature changes are
within the specified stability criteria (see chapter 8.0) and
states a time (in minutes and seconds) when the stable
situation can be achieved.
: Indicates that the “stable” situation is achieved.
If External reference is selected as TRUE, the stability
criteria will refer to this.
4:32
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The criteria can be changed, however, if the temperature
stability criteria is set wider or the stability time is set
shorter, the calibrator may not reach the SET
temperature.
If “Use stability criteria” is set to “Yes” for the SENSOR,
the automatic calibration function will continue to next
temperature step only when both TRUE and SENSOR
indicate stability.
4.4 Operating principle
The calibrator is operated using the horizontal and the vertical menu
list.
The NUMERIC keys are used for selecting and activating the various
menus and functions from both the horizontal and vertical menu lists.
The (ACTION key) and (ENTER key) are also used for
selecting and activating the menus and functions and for accessing
various parameters in setup fields.
The (ARROW keys) are used to move from menu item to menu
item in the menu lists, to access various result lists, to scroll through
various lists and to access setup fields.
4.4.1 Horizontal Menu
The horizontal menu options apply to the displayed screen. It is
dynamically giving the relevant choices during operation. Each menu
function can be activated in 2 ways:
1. Move the blue cursor with the ARROW key to mark the
menu button on the screen. Then press or to
activate the selection.
2. Whenever the menu is visible simply press the NUMERIC
key.
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4.4.2 Vertical Menu
The vertical menu list can be called at any stage of operation making it
possible to jump to the desired menu.
This allows you to jump to the most used menu easily - no matter
where you are.
Press the button to access the menu. To exit the menu,
press the button again or (BACK).
This menu always gives the same options, however at some points
some choices are not relevant and will therefore be shaded, i.e. you
can not set a temperature, when an Auto step procedure is running.
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Each menu function can be activated in 2 ways.
1. Move the cursor with the ARROW keys or to mark
the menu field on the screen. Then press or to
activate the selection.
2. When the menu is visible simply press the NUMERIC key.
4.4.3 Parameter Fields
The setup menus have fields for parameter entries. When the setup is
entered, then focus will be on the horizontal menu, and the function
here can be activated.
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By pressing the ARROW UP key focus will move from the
horizontal menu to the parameter field area.
The parameter field area focus is indicated by
The horizontal menu is now shaded
The parameter field area has a blue frame
The selected parameter field highlighted with a dark
blue color
Use the 4 ARROW keys to move between the parameter fields.
A parameter value is changed by:
Pressing or to open the field for editing.
A numeric field can be entered directly without opening
it first – simply enter the number.
When the parameter is entered press one of the keys:
This enters the value and leaves the cursor on the
parameter field.
This enters the value and moves the cursor to the next
parameter field.
°
C
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4.4.4 Working with lists
When it is possible to choose between a number of data sets, the data
sets are presented in lists.
As an example access the Calibrator Setup menu from the
vertical menu and activate “Load/Save
1
”
A list of instruments settings will be displayed.
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Press ARROW UP to move the focus from the horizontal
menu to the list.
The selected data set in the list is now highlighted with a dark
blue color.
Scrolling in the list is done using the ARROW UP key and
the ARROW DOWN key .
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When the desired dataset in the list is highlighted press or
.
Now the horizontal menu will be in focus again and here you
are able to decide what to do with the chosen dataset.
Activate the desired function in the horizontal menu. In this
example the Instrument Settings from 2009/03/27 17:15 will be
loaded from the memory into the active setup.
Some lists have no horizontal menus and only one option
available.
As an example access the Switch test menu by selecting
“Switch test
3
” from the main menu and then activate
“Results
2
”.
Scroll through the list using the ARROW UP key and the
ARROW DOWN key and just press or to display
the result of the highlighted dataset.
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4.5 Starting the calibrator
Switch on the calibrator using the power control switch (pos. 1, fig. 7).
A start up screen is displayed and then replaced with the main menu
screen:
The functions in the horizontal menu are available using the soft keys
or the arrow keys on the keyboard (see description in section 4.3).
°C
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4.6 Setting the temperature
Access the Set Temperature function by selecting “Set
Temperature
1
“.
Use the NUMERIC keys to enter a new value, or or to
accept the value. When pressing the ACTION key or the
ENTER key the calibrator returns to the main menu screen.
The Set temperature function can also be accessed using the
vertical menu (press ). Through this menu a new set point
value can be entered at any stage of the operation except
when one of the automatic functions are active.
4.7 Calibration
Note…
This Calibration function is for B versions only.
This function enables you to perform automatic calibrations of different
temperature sensors. The calibration procedure is semi-automatic,
using parameters and settings, which are defined in workorders. These
workorders are created and edited using the "JOFRACAL" PC
program. Multiple calibrations can be performed using the same
workorder settings.
°C
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Access the Calibration menu by selecting “Calibration
2
” from
the main menu.
A Workorder List is displayed.
Run the selected workorder by activating “Run
1
“. A new
calibration is started.
You can also chose to activate:
“View
2
” – shows the setting of the workorder.
“Results
3
” – shows the previous calibration results from this
workorder.
“Delete
4
” – deletes the workorder setting and the results.
For operating the Results menu see section 4.7.2.
For operating the View menu see section 4.7.3.
For operating the Delete function see section 4.7.4.
Note…
Calibration information is available in several places
throughout the calibration menus. The content of this
information is described in section 4.7.3.
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4.7.1 Running a calibration
To run the calibration, select “Run
1
“ from the Workorder List
menu.
If the serial number of the reference sensor used for
calibration does not match the one specified in the workorder
the following message is displayed :
If you proceed, the connected reference sensor will be
documented along with the results.
If you do not wish this message to appear, the correct
reference sensor must be specified when the workorder is
edited using the “JOFRACAL” PC program.
Choose “YES” and press or if you want to proceed
with the calibration.
The Parameter setup menu is displayed.
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Note…
If the sensor under test is a thermocouple sensor and the
manual compensation mode is selected in work orders, a
cold junction temperature must be defined.
The parameters in the workorder can be edited.
Note…
Only numeric data can be entered.
The BACK key cancels a selection/edit or returning
to previous menu. The ESC key can be used throughout
the process.
Select “Next
1
“ to proceed with the operation.
A workorder Scenario is displayed, giving a graphical display
of the setup and sensor connections.
Start the calibration by selecting “Start Calibration
1
”.
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The Calibration Running step 1 of 2 is started and the
temperature is heading towards step 1.
The following screen is displayed :
When the temperature has reached the stable criteria, the
calibration data will be stored and the temperature goes
towards the next set temperature.
If the workorder contains manual reading during calibration,
you will be asked to enter the Sensor Under Test temperature
before that.
The following screen is displayed :
If manual readings are specified these will have to be entered
before next step starts.
Note…
The calibration can be stopped at any time by activating “Stop
2
”, but this will erase the calibration results.
°C
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During calibration several other functions are available:
“Result
1
” - To view the calibration results (no editing is
possible).
“Pause
3
” - To pause the calibration.
“Prev
4
” - Force the calibration to jump a step backwards
to the previous calibration screen regardless of
the calibration stability.
“Next
5
” - Force the calibration to jump a step forwards to
the next calibration screen regardless of the
calibration stability. This will leave the current
step without saving calibration results.
“View
6
” - To view the workorder settings.
When the calibration has completed a green check is
shown on the screen and the Calibration Result follows
quickly hereafter.
Select “Save
1
” to store the results in the calibrator
or
select “Discard
2
” and press “Yes” to delete the calibration
results or “No” to return to the Calibration Result screen.
A full Calibration Result List can be viewed using the
instructions in section 4.7.2.
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4.7.2 Viewing calibration results
Access the Calibration Result function by selecting
“Results
3
” from the Workorder List menu.
A full Calibration Result List is displayed.
Select a workorder to be displayed showing the calibration
details for the specific workorder.
The calibration results can be uploaded with the “JOFRACAL”
PC program. This enables you to print out the results on a
certificate.
Press to exit the Calibration Result List and return to the
Workorder List menu.
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4.7.3 Displaying calibration information
Calibration information is defined within the work orders created on the
PC using "JOFRACAL".
Access the Workorder Sensors menu by selecting “View
2
”
from the Workorder List menu,
The Workorder Sensors menu is displayed.
This screen gives you an overview of the workorder sensor
setup including a summary of Notes, Scenario and Steps.
Each of these can be displayed in details
Select “Notes
1
” to access the Notes function.
A list of Workorder Notes is displayed.
The notes are information entered via the PC program, when
the workorder is created.
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Press to exit the Workorder Notes screen.
Select “Scenario
2
” to access the Scenario function.
A Workorder Scenario is displayed.
The calibration set up is shown in a graphic format, and the
active sensor input is marked. The parameters for this setup
are defined in the work order created using the PC program.
Press to exit the Workorder Scenario screen.
Select “Steps
3
” to access the Step function.
A list of Temperature Steps is displayed.
This function shows the pre-defined temperature steps for
the calibration.
Press to exit the Step function and return to the
Workorder Sensors menu.
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4.7.4 Deleting workorders
It is possible to delete a workorder using the Delete function
from the Workorder List menu.
Select “Delete
4
” to access the Delete function.
Press “Yes” if you want to delete your workorders and “No” if
you want to exit the Delete function without deleting anything.
Warning
If you choose to delete a workorder, the whole workorder
including the calibration results will be deleted.
ress to exit the Workorder List menu and return to the
ain menu.
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4.8 Switch test menu
Note…
This Switch test function is for B versions only.
Switch test automatically locates the switch temperatures of a
thermostat.
Three parameters are required:
Start temperature (T
1
)
End temperature (T
2
)
Rate of change in temperature (slope rate).
Hysteresis of a thermostat can also be determined here. Where the
hysteresis determines the tolerence between the upper switch
temperature and the lower switch temperature of the thermostat.
Fig. 12
Calibrator stable
Shifting temperature
Calibrator stable
Heating with Slope Rate
T
Cooling with Slope Rate
T
T
Expected switch range
for thermostat
Calibrator stable
t
[min]
T [°C/°F]
T
T
T
T
T
2
Open
Close
1
Star t
Open
Close
Hyste
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4.8.1 Running a switch test
Access the Switch test menu by selecting “Switch test
3
” from
the main menu.
A Switch test setup menu is displayed.
The small graph illustrates the current T
1
, T2 and hysteresis
selections. Note that T
1
can be greater than T2.
Access the setup field to edit the parameters:
T
1
- first set temperature
T
2 -
second set temperature
Hysteresis - to determine hysteresis, toggle between
"Yes" (a two-way-temperature measurement) and "No"
(a one-way-temperature measurement).
Slope rate - The permitted range is 0.1 - 9.9°C/min. /
0.2 - 17.8°F/min.
Note…
the slope rate should be set so that the
thermostat sensor can follow the temperature in the
calibrator's well.
Press to exit the setup function and return to the Switch
test setup menu.
Before starting the switch test ensure that the switch is
connected to the switch input (see page 39, pos. 6).
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Select “Start
1
” to start the switch test.
The Switch Test is now in progress.
While the switch test is in progress, 2 options are available:
“Result
1
” – displaying the current switch test results.
“Stop
3
” – stopping the switch test. Press “Yes” to stop the
switch test and “No” to return to the Switch Test
screen.
°C
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The calibrator's switch test procedure
1. Once the switch test is started, the calibrator starts working towards
T
1
as quickly as possible. The calibrator's temperature changes
(heating or cooling) and switch status are shown in the display.
2. When T
1
is achieved and the temperature is stable, the text and the
graphic in the middle of the screen will change accordingly.
3. The calibrator now starts working towards T
2
at the specified slope
rate.
4. In a normal situation, the thermostat changes state before T
2
is
achieved. If T
2
is achieved and the temperature is stable, a red
cross will be displayed instead of a green check .
5. When hysteresis is not selected (single temperature change) (the
graphic indicates the choice), the finished switch test result is
displayed.
When hysteresis is selected (two switch changes), the calibrator
starts working towards T
1
at the specified slope rate.
6. Normally, the thermostat changes state before T
1
is achieved. If T1
is reached and the temperature is stable, a red cross will be
displayed instead of a green check .
7. The finished switch test results are displayed.
4.8.2 Showing switch test results
Two types of switch test results are available:
Results during a switch test.
Results of a finished switch test.
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Results during a switch test
Access the Switch Test Result List by selecting “Result
1
”
from the Switch Test menu.
This shows the results that are currently available. These
results change as the test progresses.
Press to return to the switch test.
Finished switch test results
At the end of a switch test the results are displayed. These show the
temperature when the thermostat has closed and the temperature
when it has opened – whichever comes first. The difference between
these 2 temperatures is calculated as the hysteresis.
Select “Save
1
” to save the results storing them in the
calibrator’s memory.
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Select “Discard
2
” to delete the results from the screen.
Note…
A hysteresis result is only measured when hysteresis is set
to “Yes”.
You will then automatically return to the Switchtest setup
menu.
If no change in the switch position is registered during the
test a red cross will be displayed in the Result list instead of
a green check .
Delete the result by selecting “Discard
2
” or save the result
by selecting “Save
1
”.
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To view stored switch test results
Access the Switch Test Result List by selecting “Results
2
”
from the Switch test setup menu.
Select a test result to be displayed.
Press twice to return to the Switch test setup menu.
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4.9 Auto step menu
Auto step is used to step automatically between a range of different
calibration temperatures. This is useful when calibrating sensors in
places that are difficult to reach and sensors where the output is
displayed in a different location.
Fig. 13
4.9.1 Running an Auto step calibration
Access the Auto Step Setup menu by selecting “Autostep
4
”
from the main menu.
The Auto Step Setup menu is displayed.
Temperature stable
Calibrator starts working towards next temperature
t
T
T
T
T
T
T [°C/°F]
Time
[min]
Sta rt
1
2
3
4
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Access the Auto Step Setup to edit the parameters:
No of steps: the number of temperature steps per
direction (T
1
Tx) can be set using integers from 1 – 20.
When a Two-way mode is selected, the same number of
steps are used for the second direction (T
x
T1).
Mode: toggle between “One-way” and “Two-way”.
Hold time: defines the time (in minutes) the temperature
is maintained (after it is stable) for each step.
T step values: must be set within the sensors permitted
range.
Press to exit the editor and return to the Auto Step setup
menu.
Access the Sensor setup menu by selecting “Next
1
” from the
Auto Step Setup menu.
The Sensor setup menu is displayed. In this menu you have
the opportunity to check and if necessary change the
settings as described in section 4.10 – Sensor Setup menu.
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Select “Start 3” to start the Auto Step calibration.
An Auto Step Running step screen is displayed.
While the step test is in progress, several functions are
available:
“Result
1
” - To review the Auto Step results (no editing is
possible).
“Stop
2
” - To stop the Auto Step test.
“Pause
3
” - To pause the test.
“Prev
4
” - Force the test to jump a step backwards to the
previous running step regardless of the step’s
stability.
“Next
5
” - Force the test to jump a step forwards to the
next running step regardless of the step’s
stability.
°C
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When the Auto Step test is complete the results are
displayed.
Select “Save
1
” to save the results storing them in the
calibrator’s memory.
Select “Discard
2
” to delete the results from the screen.
The calibrator then returns to the Auto Step Setup menu.
4.9.2 Auto Step test results
At the end of an Auto Step test the results are displayed and stored in
the calibrators memory.
The measured TRUE and SENSOR temperatures for each step are
displayed.
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To view stored Auto step test results
Access the Auto Step Result List by selecting “Results
2
”
from the Auto Step Setup menu.
The Auto Step Result List is displayed.
Select an auto step result to be displayed.
Press twice to return to the Auto Step Setup menu.
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4.10 Sensor Setup menu
The Sensor Setup can be entered through the vertical menu
(press )
The Sensor Setup can also be edited immediately before
running the Auto step (section 4.9.1) or when starting a
switch test.
Activate “Sensor Setup
2
”.
4.10.1 Setting the additional stability time (A version)
Set the additional stability time by pressing and the
NUMERIC keys. Stability time can be set (in minutes) using
integers from 0 – 99.
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4.10.2 Setting the parameters for TRUE – reference sensor (B
and C versions only)
Sensor type:
Internal reference source.
The internal reference sensor will be displayed as the TRUE
value on the main screen.
The calibrator has a set of internal stability criteria it shall
meet before stability is indicated.
Additional stability time
may be set beyond the internal stability criteria.
Set the additional stability time by pressing and the
NUMERIC keys. Stability time can be set (in minutes) using
integers from 0 – 99.
External reference source
The TRUE value on the main screen will be read from the
Intelligent Reference Sensor connected to the REF. INPUT
on the front panel (see section 4.2 fig. 6). The calibrator
automatically reads the calibration data and serial number of
the Sensor.
Convert to temperature:
“yes” sets the readout of the External reference as a
temperature.
“no” sets the readout of the External reference in
values.
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SET follows TRUE:
This function enables you to reach the TRUE temperature
measured by the External reference sensor.
Note…
that when “yes” is selected, the calibrator will control the
temperature to the TRUE temperature. This means that it
could take longer time before the calibrator indicates
stability.
The “SET follows TRUE” function is indicated with the
symbol at the TRUE reading in the main display.
Note…
SET follows TRUE is only relevant when the External
reference sensor is displayed in temperature units.
Stability tolerance:
The Stability tolerance can be set down to 0.001. The
tolerance should be set low enough to utilize the good
temperature stability of the calibrator – however a low value
also gives a longer time to be stable.
Stability time:
Stability time can be set from 1 – 99 minutes.
When the TRUE temperature has reached the specified
Stability tolerance during the specified Stability time, then the
stability indicator in the main screen will turn green.
Press to accept the new setting(s) and return to the
Sensor setup menu or continue to edit the DLC sensor
parameters or the Sensor under test parameters.
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4.10.3 Setting the parameters for DLC– dynamic load
compensation (B and C versions only)
The DLC value on the main screen will be read from the
Intelligent Load Sensor as soon as it is connected to the
DLC INPUT on the front panel (see section 4.2 fig. 6). The
calibrator automatically reads the calibration data and serial
number of the Sensor.
However if the Dynamic Load Compensation shall be active,
it must be enabled.
Use load compensation:
The active “DLC” function is indicated with the symbol at
the DLC reading in the main display.
Note…
always use external reference sensor when calibrating with
the DLC-function activated for specified accuracy.
Press to accept the new setting(s) and return to the
Sensor setup menu or continue to edit the reference sensor
parameters or the Sensor under test parameters.
4.10.4 Setting the parameters for SUT– Sensor under test (B
versions only)
Sensor type:
Choose between :
thermocouple sensors (V)
voltage sensors (V)
current (ma) sensors
RTD sensors (resistance temp. detector ())
None (no sensor connected)
Select a sensor.
The selected sensor and its list of parameters are now
displayed. The various settings can be edited as described in
the following :
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Convert to temperature:
(using thermocouple, voltage, current and RTD)
“yes” – the inputs are converted to temperatures.
“no” – no conversion is made.
When “no” has been selected the type of model is the
only other parameter which can be altered.
Model:
(using thermocouple and RTD)
Toggle between the models; K, N, R, S, T, U, B, E and J
(thermocouple) or P10(90)385, P100(90)385, P100(90)392,
P1000(90)385, P200(90)385, P50(90)385, P500(90)385, Pt100 MILL, P100(90)391, P50(90)391, YSI-400,
H120(90)672, M100(90)428, M50(90)428-06,
M100(90)428… and M50(90)428 (RTD).
Cold junction compensation:
(using thermocouple)
“auto” – when the automatic mode is selected, the
calibrator measures the temperature in the T/C
connector and uses this for the cold junction
compensation of the thermocouple.
“manual” – to define a manual temperature for cold
junction compensation. Can be used when an external
cold junction temperature can be established.
Cold junction temperature:
(using thermocouple)
When “manual” Cold junction compensation has been
selected the temperature for cold junction can be set using
the NUMERIC keys.
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Voltage(V) and temperature(T) span:
(using voltage)
The minimum and the maximum of the voltage and the
corresponding temperature span can be set here.
Use the NUMERIC keys to set the value of the voltage
and/or the temperature.
Current(C) and temperature(T) span:
(using current)
The minimum and the maximum of the current and the
corresponding temperature span can be set here.
Use the NUMERIC keys to set the value of the current
and/or the temperature.
Number of wires:
(using RTD)
The number of wires used for the sensor under test can be
selected here.
Choose between 2, 3 or 4 wires.
Use stability criteria:
(using thermocouple, voltage, current and RTD)
Beside the stability check on the Reference sensor, it is also
possible to ensure that the Sensor Under Test (SENSOR) is
stable before the temperature is indicated as stable.
“yes” – Stability will be checked on both Reference
sensor (TRUE) temperature and Sensor Under Test
(SENSOR) temperature.
“no” – Stability will be checked on Reference sensor
(TRUE) temperature only.
Stability tolerance:
(using thermocouple, voltage, current and RTD)
Enter the Stability tolerance (temperature) by pressing the
NUMERIC keys.
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The Stability tolerance can be set down to 0.001 however
the expected performance of the Sensor Under Test should
be considered before setting the tolerance.
Stability time:
(using thermocouple, voltage, current and RTD)
Set the Stability time by pressing the NUMERIC keys.
Stability time can be set from 1 – 99 minutes.
When the SENSOR temperature has reached the specified
Stability tolerance during the specified Stability time, then the
stability indicator in the main screen will turn green.
4.10.5 Viewing the Reference and DLC data (B and C versions
only)
The calibration data of the Intelligent Reference sensor and
the intelligent DLC sensor can be viewed using the
Reference Info function or the DLC Info function from the
Sensor setup menu.
View the Reference Info box by selecting “Reference
Info
1
”.
The Reference Info box is displayed.
Press to return to the Sensor setup menu.
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View the DLC Info box by selecting “DLC Info
2
”.
The DLC Info box is displayed.
Press to return to the Sensor setup menu.
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4.11 Calibrator Setup menu
The Calibration Setup can be edited through the vertical
menu (press ).
Activate “Calibrator Setup
3
”.
4.11.1 Setting the temperature parameters
Temperature unit:
Choose between:
°C (Celsius)
°F (Fahrenheit)
K (Kelvin)
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Min SET temp / Max SET temp:
Enter the access code to get access to the editor.
Use the NUMERIC keys to set the Min/Max SET
temperature in Celsius, Fahrenheit or Kelvin.
Note…
The Enter Access Code box is displayed every time you try
to access the Min/Max SET temp parameters. Type in your
access code and continue.
Access code:
he following features can be protected by an access code:
Resetting the calibrator to Factory default settings.
Setting the Min/Max SET Temperature.
Editing the Access code while it is enabled.
Press or to access the Access code function.
Use the NUMERIC keys to type in a value from 0000 to
9999. Use all 4 digits.
Typing 0000 disables the Access code function.
The access code is accepted showing a green check for
a few seconds allowing you to continue.
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Caution…
If you choose to let your access code consist of only 1, 2 or
3 digits you must enter the access code with 0 followed by
the chosen value.
Example
:
The access code 12 is selected.
Type in 0012 in the Enter Access Code box
Note…
The access code can be deleted allowing you to change the
Min/Max SET temperature without having to enter the
access code.
Press or to access the Access code function.
Type in your access code.
No new value is entered.
Accept the new setting (empty box).
It is now possible to enter the editor without using the
access code.
4.11.2 Setting the temperature resolution
Choose between :
SET
READ
TRUE
SENSOR
Choose between the resolutions:
0.001
0.01
0.1
1
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SENSOR visible:
Choose between :
Visible
Hidden
If the Hidden option is chosen the Sensor Under Test
reading will not be displayed on the main screen.
4.11.3 Setting the sound, volume and operating mode
Sound:
Choose between :
On
Off
Enables the calibrator to make a sound during operation.
Sound responses are given at the following conditions:
Stability
Warnings
Accept of data entry
Reject of data entry
Volume:
The volume of the sound can be adjusted from 0 – 100%.
Operating mode:
Choose between :
Fast
Silent
“Fast” – the fan operates in a fast mode giving the best
performance of cooling.
“Silent” – the fan operates in a silent mode reducing the
noise. Using this option the cooling process is
made a little slower and the calibrator might not
be able to reach the specified minimum
temperature.
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4.11.4 Setting calibration interval
Sets the required recalibration interval for the calibrator.
Choose a value between 1 month and 99 months.
When the recalibration interval is exceeded, the warning
symbol will appear in the display.
Note…
The recalibration interval is not used for the external
reference sensor and the DLC. The interval for these
sensors are stored in the intelligent sensor.
4.11.5 Changing the date and time
Date:
Use the NUMERIC keys to enter a new date.
The date can only be entered using the format yyyy-mm-dd.
When entering the date with different format, the text will
disappear when you try to accept the setting.
Time:
The calibrator is set up with a default time (present time).
Use the NUMERIC keys to enter a new time using the
format hh.mm.
Time Zone:
The relevant time zone is selected from a list of various
zones.
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4.11.6 Saving a setup
Saving a setup saves parameters in the Setup menu.
Access the Instrument Settings menu by selecting
“Load/Save
1
” from the Calibrator Setup menu.
The Instrument Settings are displayed.
Select a register number to be used for saving.
The setup will be saved with the selected register number.
Note…
In the Calibrator Setup the following parameters will not be
saved:
Min SET temp
Max SET temp
SENSOR visible
You can save up to 10 setups.
When the setup is saved the parameters are visible in the
right side of the screen.
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4.11.7 Loading a setup
Loading a setup causes the setup parameters to be overwritten.
Select a setup from the list to be loaded.
The selected setup will be loaded into the calibrator’s
memory.
Press to return to the Calibrator setup menu.
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4.11.8 Resetting the instrument setup to factory defaults
Resetting to the factory default settings changes the active setup to the
initial settings.
4.11.9 Network Configuration (for service use only)
Access the Network Configuration function by selecting
“Network
2
” from the Calibration Setup menu.
The Network Configuration screen is displayed.
When DHCP is set to Enabled, the IP address will be
updated when leaving the network menu.
When DHCP is disabled, you can configure the IP-settings
manually using the NUMERIC keys.
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4.12 Selecting the stirrer speed (RTC-158/250
A/B/C only)
Use the NUMERIC keys to enter a value, or or to
accept the value. When pressing the ACTION key or the
ENTER key the calibrator returns to the main menu screen.
Select a speed setting between 0 and 100.
The normal setting is between 30 and 40.
When using the RTC-158/250 A/B/C with a dry block kit the
stirrer speed must be set to 0.
The DLC will be disabled when the stirrer is started
The Sensor Setup can be entered through the vertical menu
(press )
Use the ARROW keys to select “Stirrer Speed”.
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Caution…
If the speed level chosen is too high, the magnet will fall off
making a rattling sound and there will be no stirring in the
fluid. With no stirring of the fluid, temperature gradients will
emerge in the bath, which will again affect the result of the
calibration.
To reconnect the magnet, set the speed level to 0 and
select a speed setting lower than the previous.
Press or to accept the value and return to the
setup menu.
4.13 Information Screen
Information about the status can be viewed using the Info
function from the vertical menu (press ).
A status summary of the sensors setting and stability
information is displayed.
If a warning or an error has occurred, it will be listed on the
information screen.
Note…
The list will be cleared, when the calibrator is switched off.
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Press to exit the Info function.
4.14 About the calibrator
Information about the calibrator can be viewed using the
About function from the vertical menu (press ).
This informs you about the calibrator type, the software
version installed, the serial number, the date when it was last
calibrated, the build date and the build description.
Press to exit the About function.
4.15 Simulation or training
Switch off the calibrator and switch it on again using the
power control switch.
The start up screen is displayed.
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Shortly after a black screen is displayed for a few seconds
and then the start up screen is displayed again.
Now press and hold down for a minimum of 5 seconds
while the start screen is displayed.
The calibrator will start in the simulation mode.
This mode is used to train personnel. The simulation differs
from the standard setting in the following ways:
The instrument does not actually heat up or cool down the
well.
The heating and cooling processes are simulated at
exaggerated speeds.
Data are not stored in the calibrator’s memory.
The calibrator will remain in simulation mode until it is
switched off.
°C
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5.0 After use
5.1 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
(all versions).
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.
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.
Dry-block calibrators only
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.
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.
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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 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.
Remove the insertion tube from the calibrator using the tool for
insertion tube supplied with the instrument (see fig. 14).
Fig. 14
Tool for insertion tube
Tool for insertion tube
Insertion tube
Hole for tool for insertion tube
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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.
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.
Never place a hot insertion tube in the optional carrying
case.
Do not touch the well or insertion tube when these are
deep frozen – they might create frostbite.
5.1.1 Transporting the dry-block calibrator
Caution…
The insertion tube must be removed to avoid damage to the
instrument if the calibrator is to be transported long
distances.
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