Ametek ATC-320 A, ATC-156 A, ATC-650 A, ATC-125 B, ATC-140 B Reference Manual
...
Reference Manual
Temperature Calibrator
JOFRA ATC-125/140/156/157/250/320/650 A/B
Copyright 2009 AMETEK Denmark A/S
2 23-03-2009 105446 06
About this manual….
The structure of the manual
This reference manual is aimed at users who are familiar with
AMETEK calibrators, as well as those who are not. The manual
is divided into 9 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
Events that may compromise the safe use of the
instrument and result in considerable personal or
material damage.
Caution…
Events 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 ..............................................................................5
2.0 Safety instructions...................................................................7
3.0 Setting up the calibrator........................................................13
3.1 Receipt of the calibrator.............................................................. 13
3.2 Preparing the dry-block calibrator............................................... 16
3.2.1 When setting up the dry-block calibrator, you must… ... 17
3.2.2 Choice of insertion tube.................................................. 19
3.2.3 Inserting the sensors...................................................... 20
3.3 Preparing the liquid bath calibrator (ATC-140/250 only) ............ 22
3.3.1 When setting up the liquid bath calibrator, you must….. 23
3.3.2 Selection of fluids ........................................................... 27
3.3.3 Handling of lids............................................................... 28
3.3.4 Inserting the sensors...................................................... 29
4.0 Operating the Calibrator........................................................30
4.1 Keyboard, display and standard connections............................. 30
4.2 Input module (B versions only) ................................................... 33
4.3 Display readouts ......................................................................... 34
4.3.1 Main screen temperature values.................................... 35
4.3.2 Stability of temperature values....................................... 35
4.4 SET temperature menu .............................................................. 36
4.5 Calibration menu......................................................................... 36
4.5.1 Running a calibration...................................................... 37
4.5.2 Showing calibration results ............................................ 40
4.5.3 Displaying calibration information .................................. 41
4.6 Switch test menu ........................................................................ 42
4.6.1 Running a switch test ..................................................... 44
4.6.2 Showing switch test results ............................................ 45
4.7 Auto step menu........................................................................... 47
4.7.1 Running an Auto step calibration ................................... 48
4.7.2 Auto step test results...................................................... 49
4.8 Setup menu................................................................................. 51
4.8.1 Loading a setup.............................................................. 51
4.8.2 Saving a setup................................................................ 52
4.8.3 Adjusting the display contrast ........................................ 52
4.8.4 Altering temperature display settings............................. 52
4.8.5 Setting the sensor input parameters (B versions only) .. 55
4.8.6 Altering Stability criteria.................................................. 58
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4.8.7 Selecting the stirrer speed (ATC-140/250 A/B only)...... 59
4.8.8 Setting the access code ................................................. 59
4.8.9 Resetting the calibrator setup to factory defaults .......... 60
4.8.10 About the calibrator........................................................ 61
4.9 Simulation or training .................................................................. 62
5.0 After use..................................................................................63
5.1 Storing and transporting the calibrator ....................................... 63
5.8.1 Transporting the dry-block calibrator ............................. 65
5.8.2 Transporting the liquid bath calibrator............................ 65
5.2 Emptying the well (liquidbaths only) ........................................... 66
6.0 Replacing the main fuses......................................................67
6.1 Returning the calibrator for service............................................. 68
7.0 Maintenance............................................................................70
7.1 Cleaning...................................................................................... 70
7.2 Adjusting and calibrating the instrument..................................... 72
7.2.1 Introduction to AmeTrim-ATC Software ......................... 72
7.2.2 Installing the AmeTrim-ATC Software............................ 73
7.2.3 Connecting the PC and the Calibrator ........................... 73
7.2.4 Starting the AmeTrim-ATC Software.............................. 73
7.2.5 Temperature Adjustment................................................ 75
7.2.6 Input Adjustment (B versions only) ................................ 80
7.2.7 Reference Sensor .......................................................... 85
7.2.8 Managing DTI sensor coefficients.................................. 87
7.2.9 Setup Printer .................................................................. 88
8.0 Technical specifications........................................................89
9.0 List of accessories...............................................................121
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1.0 Introduction
Congratulations on your new AMETEK JOFRA ATC
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 ATC-125 A - Cooling calibrator
JOFRA ATC-125 B - Cooling calibrator with input panel
JOFRA ATC-140 A - Cooling calibrator
JOFRA ATC-140 B - Cooling calibrator with input panel
JOFRA ATC-155 A - Cooling calibrator
JOFRA ATC-155 B - Cooling calibrator with input panel
JOFRA ATC-156 A - Cooling calibrator
JOFRA ATC-156 B - Cooling calibrator with input panel
JOFRA ATC-157 A - Cooling calibrator
JOFRA ATC-157 B - Cooling calibrator with input panel
JOFRA ATC-250 A - Heating calibrator
JOFRA ATC-250 B - Heating calibrator with input panel
JOFRA ATC-320 A - Heating calibrator
JOFRA ATC-320 B - Heating calibrator with input panel
JOFRA ATC-650 A - Heating calibrator
JOFRA ATC-650 B - Heating calibrator with input panel
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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 Lowvoltage Directive.
Technical assistance
Please contact the dealer from whom you acquired the instrument
if you require technical assistance.
Warranty
According to current terms of sale and delivery.
This warranty only covers defects in manufacture and becomes
void if the instrument has been subject to unauthorised
intervention and/or misuse.
105446 06 23-03-2009 7
2.0 Safety instructions
Read this manual carefully before using the
instrument!
In order to avoid any personal injuries and/or damage to
the instrument all safety instructions and warnings must be
observed.
Disposal – WEEE Directive
These calibrators contain Electrical and Electronic circuits
and must be recycled or disposed of properly (in
accordance with the WEEE Directive 2002/96/EC).
Warning……
About the use:
The calibrator must not be used for any purposes other
than those described in this manual.
The calibrator has been designed for interior use only
and should not be used in hazardous areas, where
vapour or gas leaks, etc. may constitute a danger of
explosion.
The calibrator must be kept free within an area of 20
cm on all sides and 1 metre above the calibrator.
Never use heat transfer fluids such as silicone, oil,
paste, etc. in the dry-block calibrators. These fluids may
penetrate the calibrator and cause damage or create
poisonous fumes.
The calibrator must be switched off before any
attempt to service the instrument is made.
When cleaning the well, REMEMBER to wear goggles
when using compressed air in the dry-block calibrator
and cleaning oil in the liquid bath calibrator.
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The ATC-125 contains the gases R-1270 and R-704
under pressure. The calibrator must under no
conditions be stored or operated at ambient
temperatures above 60C (140F). Doing so may cause
a hazard.
About the front panel:
For B versions only, the sockets on the input module
must NEVER be connected to voltages exceeding 5V
for the TC/RTD sockets and 45V for the mA/V sockets
proportional to ground. 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.
If you intend to store the calibrator in the optional
aluminium carrying case after use, you must ensure
that the instrument has cooled down to a temperature
below 100°C/212°F before placing it in the 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 be identical and correspond
to the chosen voltage.
About the liquid bath:
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.
105446 06 23-03-2009 9
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 overheated
they will create noxious or toxic fumes. Proper
ventilation must be used.
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 250°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.
Do not touch the lid or the spill tray when the calibrator
is heating up – they may be very hot (ATC-140/250 A/B
only).
Do not touch the tip of the sensor when it is removed
from the insertion tube/well – it may be very hot.
Do not touch the handle of the calibrator during use – it
may be very hot.
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Over 100°C/212°F
If the calibrator has been heated up to temperatures
above 100°C/212°F, you must wait until the instrument
reaches a temperature below 100°C/212°F before you
switch it off.
Caution – Cold surface
Below 0°C/32°F (applies only to the ATC-125/140/156/
157 A/B models)
Do not touch the well or insertion tube when these are
below 0°C/32°F - they might create frost-bites.
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 verdigris to
form on the material.
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 and any water left will
evaporate.
Remove the insulation plug while heating up.
It is very important that humidity in the well and insertion
tube is removed to prevent corrosion and frost
expansion damages.
Caution…
About the use:
Do not use the instrument if the 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:
Be careful not to overfill the well with oil.
Avoid getting silicone oil on the clothes. It is impossible
to wash off. (ATC-140/250)
105446 06 23-03-2009 11
The oil level rises several centimetres when the
temperature is rising. To stop overflow switch off the
main power and the oil level will decrease.
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 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.
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) / 320°C (608°F) / 650°C
(1202°F) - for a period of minimum 30 minutes (ATC250/320/650 A/B 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 to avoid damage to the instrument.
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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 unauthorised spare parts.
105446 06 23-03-2009 13
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 CD-ROM containing software package
“JOFRACAL”
1 AMETRIM-ATC/DTI software package to
adjust the ATC series
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1 RS232 serial cable
1 tool for insertion tube
1 traceable certificate (A versions)
2 traceable certificates (B versions)
1 reference manual
1 user manual
ATC-125/156/157/320/650 A/B only
1 insertion tube (user specified)
3 pcs. insulation plugs for 6, 10, 16 mm sensors
(ATC-125/156 A/B only)
or
3 pcs. insulation plugs for 5, 8, 11 mm sensors
(ATC-157 A/B only)
Referen ce Manual
User Manu al
105446 06 23-03-2009 15
Dow corning
Material data sheet
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ATC-140/250 A/B only (dry-block)
1 dry block kit – metric consisting of :
- 1 insertion tube, multi-hole, metric, with
11 bores (incl. reference bore)
- 1 pcs. insulation plug for multi-hole,
metric (ATC-140 A/B only)
or
1 dry block kit – inch consisting of :
- 1 insertion tube, multi-hole, inch, with 11
bores (incl. reference bore)
- 1 pcs. insulation plug for multi-hole, inch
(ATC-140 A/B only)
ATC-140/250 A/B only (liquid bath)
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 silicone oil
- 1 oil material safety data sheet
When reordering, please specify the parts number
found in the list of accessories, chapter 9.0.
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3.2 Preparing the dry-block calibrator
The ATC-B-version has a precision reference input. To achieve the
high precision, a set of sensor coefficients relating to the specific
sensor must be present in the ATC. Before use of the ATC, ensure that
the correct coefficients in the ATC are equal to those from the sensors
calibration certificate. This is done with the PC software JOFRACAL
included on the CD. Please read how to do in the chapter “Reference
Sensors” in the JOFRACAL user manual on the CD.
Warning
The calibrator must not be used for any purposes other
than those described in this manual.
The calibrator has been designed for interior use only
and should not be used in hazardous areas, where
vapour or gas leaks, etc. may constitute a danger of
explosion.
The calibrator must be kept free within an area of 20
cm on all sides and 1 metre above the calibrator.
The ATC-125 contains the gases R-1270 and R-704
under pressure. The calibrator must under no
conditions be stored or operated at ambient
temperatures above 60C (140F). Doing so may cause
a hazard.
Note…
The instrument must not be exposed to draughts.
105446 06 23-03-2009 17
Fig. 1a
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.
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Check the voltage on 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. 1a):
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. Turn the fuse box 180° and slide it 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.
105446 06 23-03-2009 19
3.2.2 Choice of insertion tube
Caution…
Before using new insertion tubes for calibration, the
insertion tubes must be heated up to maximum temperature
- 250°C (482°F) / 320°C (608°F) / 650°C (1202°F) - for a
period of minimum 30 minutes.
In order to ensure the best calibration of your sensors
please avoid using insertion tubes in the ATC-320
calibrator, which have been used in the ATC-650 calibrator.
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 +0.2
+0.05/-0 mm.
In order to get optimum results and preventing 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. EPDM plugs (spare part no. 126280).
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3.1.3 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 calibrator.
These fluids may penetrate the calibrator and cause
damage or create poisonous fumes.
Insert the sensors as shown in fig. 2a.
Fig. 2a
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Reference sensor
(if available)
Sensor under test
Insertion tube
105446 06 23-03-2009 21
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.
Do not touch the tip of the sensor when it is removed
from the insertion tube – it may be very hot.
Do not touch the handle of the calibrator during use –
it may be very hot.
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 verdigris to form on
the material.
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 and any water left will
evaporate.
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 can create frost-bites.
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3.3 Preparing the liquid bath calibrator
Warning
The calibrator must not be used for any purposes other
than those described in this manual.
The calibrator has been designed for interior use only
and should not be used in hazardous areas, where
vapour or gas leaks, etc. may constitute a danger of
explosion.
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 an liquid bath. If these fluids are overheated 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.
Note…
The instrument must not be exposed to draughts.
105446 06 23-03-2009 23
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Reference sensor
(if available)
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Fig. 1b
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.
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Caution…
Do not use the instrument if the internal fan is out of
order.
The well must be clean before use.
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. 1b):
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:
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.
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.
105446 06 23-03-2009 25
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. 250°C hot
oil.
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 to maximum. To stop the overflow
switch off the main power and the oil level will decent.
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.
Start the stirring magnet by following the procedure in section
4.8.7.
Place the calibration lid onto the well. See section 3.3.3 for
drilling information.
Select a SET-temperature according to the tables of
recommended oil volume by following the procedure in
section 4.4.
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Support rod set
Sensor under test
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. 2b.
Fig. 2b
Caution…
The tip of the sensor should rest at the bottom of the
sensor basket for optimum results.
105446 06 23-03-2009 27
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.
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 140°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
ATC-250 A/B ATC-140 A/B
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 - 140°C 90%
150°C - 200°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.
105446 06 23-03-2009 29
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 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.
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.
Do not touch the tip of the sensor when it is removed
from the well – it may be very hot.
Do not touch the handle of the calibrator during use –
it may be very hot.
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4.0 Operating the Calibrator
4.1 Keyboard, display and standard connections
Keyboard
Fig. 3
Pos. Description
LCD.
SOFT KEYS used to select menu options displayed in the
LCD.
ENTER KEY used to accept selected options or entered
values.
NUMERIC KEYS used to type in values.
CALIBRA T IO N INSTRUMENTS
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