Ametek JOFRA ITC-155 A User manual

User manual
Temperature Calibrator
JOFRA ITC-155/320/650 A
Copyright 2005 AMETEK DENMARK A/S (123311-UK)

19-09-2005

19-09-2005
2
3
4
5
6
7
9
10 8
1
+-
Switch Test
RS232
FIG. 1
CALIBRATIONINSTRUME
NTS

19-09-2005
AUTO
STEP
SWITCH
TEST
ESC
MENU
min
C
F
F
C
°
°
°
°
CALIBRATION INSTRUMENTS
FIG. 2

19-09-2005
°C
°C

19-09-2005

19-09-2005

19-09-2005

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List of contents
1.0 Introduction..................................................................... 2
1.1 List of equipment received ..................................................2
2.0 Safety instructions ......................................................... 3
3.0 Operating the calibrator................................................. 6
3.1 Before use ...........................................................................6
3.2 Keyboard .............................................................................8
3.3 Display.................................................................................8
3.4 Connections ........................................................................9
3.5 Calibrator functions - overview ............................................9
3.6 Selecting the set-temperature .............................................9
3.7 SWITCH TEST ..................................................................10
3.8 AUTO STEP ......................................................................11
3.9 MENU................................................................................12
4.0 Setting the main voltage and replacing the fuses .... 13
5.0 After use........................................................................ 15

2 123311 01
1.0 Introduction
ITC-calibrators are temperature calibrators designed to calibrate
temperature sensors and temperature switches.
Read this manual carefully before using the instrument and make
sure that all safety instructions and warnings are observed.
1.1 List of equipment received
When you receive the instrument, the following should be enclosed:
• 1 calibrator
• 1 mains cable
• 1 set of test cables (1 black, 1 red)
• 1 insertion tube
• 1 tool for insertion tube
• 1 traceable certificate
• 1 reference manual
• 1 user manual
• RS232 serial cable
• 1 CD-ROM containing software package “JOFRACAL” (The
adjustment software “AmeTrim” is not applicable to the ITC-
calibrators)

123311 01 3
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.
These fluids may penetrate the calibrator and cause
damage or create poisonous fumes.
About the front panel:
• The connections used to test thermostats must NEVER
be connected to a voltage source.
• Thermostats must not be connected to any other
voltage source during a test.

4 123311 01
About the insertion tubes 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
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.
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 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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Caution…
About the use:
• Do not use the instrument if the ventilator is out of
order.
About the well, insertion tube and grid plate:
• The well and the insertion tube must be clean before
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.
• The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause verdigris on the
insertion tube inside the instrument. There is a risk that
the insertion tube may be stuck if this is allowed to
happen.
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.

6 123311 01
3.0 Operating the calibrator
3.1 Before use
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 connections used to test thermostats (fig. 1 pos. 8
and 9) must NEVER be connected to a voltage source.
• Thermostats must not be connected to any other
voltage source during a test.
• NEVER use heat transfer fluids such as silicone, oil,
paste, etc.
These fluids may penetrate the calibrator and cause
damage or create poisonous fumes.
• The calibrator must be kept clear within an area of 20
cm on all sides and 1 metre above the calibrator.
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 handle of the calibrator during use – it
may be very hot.

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Follow the instructions below before using the calibrator (cf. Fig. 1):
1. Place the calibrator on an even horizontal surface away from
all draughts.
Caution…
Do not use the instrument if the ventilator is out of order.
Ensure a free supply of air to the ventilator located at the
bottom of the instrument (pos. 7).
2. Check that the voltage shown on the power control switch
(pos. 5) is identical to the mains voltage.
3. Plug in the cable below the power control switch (pos. 6) and
check that the earth connection is present.
4. Select an insertion tube (pos. 2) with a well diameter that
matches the sensor (pos. 1) to be calibrated. Insert the
insertion tube in the well of the calibrator
Caution…
• The well and the insertion tube must be clean before
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.
5. Place the sensor (pos. 1) in the insertion tube (pos. 2) as
shown in Fig. 1.
6. In order to spare the sensor and its connections it is
recommended to use a heat protection shield (104216) at
high temperatures.

8 123311 01
3.2 Keyboard
The keys on the keyboard activate the following functions (cf. Fig. 2):
POS Description
cUP ARROW button used to adjust temperature values
(value increases) and to select menu options.
dDOWN ARROW button used to adjust temperature values
(value decreases) and to select menu options.
eENTER button used to accept chosen options.
fESC/MENU button used to escape or to activate the menu
system (hold button down for min. 2 seconds).
gAUTO STEP button used to activate AUTO STEP.
The function is used to switch between a series of set-
temperatures automatically.
hSWITCH TEST button used to activate SWITCH TEST.
The function automatically detects the opening/closing
temperatures for thermostats.
3.3 Display
The various segments of the display are used to indicate the following
(cf. Fig. 2):
POS Description
iUsed to display Read-temperature and parameters in the
menu system.
jCelsius temperature unit for top display.
kFahrenheit temperature unit for top display.
lCelsius temperature unit for bottom display.
Fahrenheit temperature unit for bottom display.
Minute time unit for bottom display.

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Used to display set-temperature, time-until-stable and
parameter values in the menu system.
AUTO STEP symbol used to indicate that the function is
active (symbol flashes repeatedly).
SWITCH TEST input closed.
SWITCH TEST input open.
Check mark displayed when the calibrator is stable.
3.4 Connections
The instrument is designed for the following connections (cf. Fig. 1):
POS Description
jConnection of black test cable -
kConnection of red test cable +
lConnection of RS232 cable
Note that all PC-equipment, which are connected to the
calibrator must observe the directive IEC950.
3.5 Calibrator functions - overview
The instrument’s functions are divided into hierarchical groups. See
the key diagram in Fig. 3.
3.6 Selecting the set-temperature
)Press or .The current set-temperature flashes (the
starting point is the last chosen set-temperature even if the
instrument has been switched off).
)Press or to select the required temperature.
)Press to accept the change or to cancel and
return to the previous value.
The calibrator will now work towards the new set-temperature.

10 123311 01
3.7 SWITCH TEST
The SWITCH TEST function (cf. Fig. 4) automatically locates the
opening/closing temperatures of a thermostat. You must enter a Tmin -
and a Tmax -temperature which define the range within which the
opening/closing temperatures are expected to be found.
)Press . The last chosen Tmin -temperature value will
flash.
)Press or to set the required Tmin -temperature.
)Press to accept your selection.
)Press or to set the required Tmax -temperature.
)Press to accept your selection. The function is
activated.
Once the opening/closing temperatures have been located, the
instrument will display the values as (the closing
temperature), (the opening temperature) and (the
difference between the opening/closing temperatures) respectively. If
a temperature has not been found, the instrument will display .
)To display the three temperatures, press or .
)Press to end the test or to leave the function at
any time.

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3.8 AUTO STEP
The AUTO STEP function (cf. Fig. 5) is used to step automatically
between a range of different set-temperatures.
)Press . The instrument displays the number of set-
temperature .
)Press or to select the required number of steps.
)Press to accept your selection. The first set-
temperature will flash.
)Press or to select the required temperature.
)Press to accept your selection. The next set-
temperature will flash. This process will be repeated until the
last value has been accepted. The extra for which you
wish the calibrator to remain at every step will flash.
)Press or to set the required number of minutes.
)Press to accept your selection. The function will be
activated.
)Press after the last set-temperature to end the function
or to leave the function at any time.

12 123311 01
3.9 MENU
The MENU function (cf. Fig. 6) is used to modify the SETUP
parameters.
)Hold down for approx. 2 seconds. The word will
appear on the display.
)Press . The first SETUP parameter will be displayed.
)Press or to toggle between the SETUP parameters:
: Temperature unit °C or °F.
: The highest permissible temperature for
the calibrator.
: Temperature change per minute used
in connection with SWITCH TEST.
: Extra time which must elapse once the
well is stable before the check mark
symbol is displayed.
: Temperature resolution of 0 or 1
decimal.
)Press to select the SETUP parameter you wish to
change. The current value will flash.
)Press or to select the required value.
)Press to accept your selection or to cancel and
return to the previous value.
)Once you have changed all SETUP parameters as required,
cancel the function by pressing twice.