Ametek JOFRA CTC-140 A User manual

User manual
Temperature Calibrator
JOFRA CTC-140/320/650 A/B
JOFRA CTC-1200 A
Copyright 2003 AMETEK DENMARK A/S

11-09-2003 123199 01
4
5
6
7
8
9
11
12 10
3
2
1
+-
Switch Test
RS232
FIG. 1
CALIBRATI
ONINSTRUMENTS

123199 01 11-09-2003
AUTO
STEP
SWITCH
TEST
ESC
MENU
min
C
F
F
C
°
°
°
°
CALIBRATION INSTRUMENTS
FIG. 2

11-09-2003 123199 01
°C
°C

123199 01 11-09-2003

11-09-2003 123199 01

123199 01 11-09-2003

11-09-2003 123199 01
.......................................................................ENGLISH
..................................................................... DEUTSCH
.................................................................... FRANÇAIS
......................................................................ITALIANO
..................................................................... ESPAÑOL
................................................................PORTUGUÊS
..................................................................... РУССКИЙ
................................................................... JAPANESE
.......................................................................CHINESE
..........................................................................DANSK

1/12 ENGLISH
List of contents
1.0 Introduction..................................................................... 2
1.1 List of equipment received ..................................................2
2.0 Operating the calibrator................................................. 3
2.1 Before use ...........................................................................3
2.2 Keyboard .............................................................................5
2.3 Display.................................................................................5
2.4 Connections ........................................................................6
2.5 Calibrator functions - overview ............................................6
2.6 Selecting the set-temperature .............................................6
2.7 SWITCH TEST ....................................................................7
2.8 AUTO STEP ........................................................................8
2.9 MENU..................................................................................9
3.0 Setting the main voltage and replacing the fuses .... 10
4.0 After use........................................................................ 12

ENGLISH 2/12
1.0 Introduction
CTC-calibrators are temperature calibrators designed to calibrate
temperature sensors and temperature switches.
Read this manual carefully before using the instrument and make
sure that all safety instructions and warnings are observed.
1.1 List of equipment received
When you receive the instrument, the following should be enclosed:
• 1 calibrator
• 1 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 “AmeCal Temperature
Light”

3/12 ENGLISH
2.0 Operating the calibrator
2.1 Before use
Warning
• The calibrator must not be used for any purposes other
than those described in this manual.
• The calibrator is designed for interior use only and
should not be used in risk-prone areas, where vapour
or gas leaks, etc. may constitute an explosives hazard.
• The connections used to test thermostats (Fig. 1 pos.
10 and 11) must NEVER be connected to voltages
exceeding 50V. The thermostats must not be connected
to any other source of voltage during the test.
• NEVER use heat transfer fluids such as silicone, oil,
paste, etc.
• The calibrator must be kept clear within an area of 20
cm on all sides and 1 metre above the calibrator.
• Use only insulation plugs supplied by Ametek Denmark
A/S. Do not try to modify the insulation plugs (CTC-
1200 A only).
Caution – Hot surface
This symbol is engraved in the grid plate.
• Do not touch the grid plate, the well or the insertion
tube as the calibrator is heating up – they may be very
hot.
• Do not touch the handle of the calibrator during use – it
may be very hot.

ENGLISH 4/12
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. 9).
2. Check that the voltage shown on the power control switch
(pos. 7) is identical to the mains voltage.
3. Plug in the cable below the power control switch (pos. 8) and
check that the earth connection is present.
4. Select an insertion tube (pos. 4) with a well diameter that
matches the sensor (pos. 1) to be calibrated. Insert the
insertion tube in the well of the calibrator (note that the well
and the insertion tube must be clean before use).
5. If the design of the sensor permits it, use an insulation tube
(pos. 2) and insulation (pos. 3) for the best results. These
should be mounted as shown in Fig. 1.
6. Place the sensor (pos. 1) in the insertion tube (pos. 4) as
shown in Fig. 1.
7. In order to spare the sensor and its connections it is
recommended to use a heat protection shield (104216) at
high temperatures.

5/12 ENGLISH
2.2 Keyboard
The keys on the keyboard activate the following functions (cf. Fig. 2):
POS Description
UP ARROW button used to adjust temperature values
(value increases) and to select menu options.
DOWN ARROW button used to adjust temperature values
(value decreases) and to select menu options.
ENTER button used to accept chosen options.
ESC/MENU button used to escape or to activate the menu
system (hold button down for min. 2 seconds).
AUTO STEP button used to activate AUTO STEP.
The function is used to switch between a series of set-
temperatures automatically.
SWITCH TEST button used to activate SWITCH TEST.
The function automatically detects the opening/closing
temperatures for thermostats.
2.3 Display
The various segments of the display are used to indicate the following
(cf. Fig. 2):
POS Description
Used to display Read-temperature and parameters in the
menu system.
Celsius temperature unit for top display.
Fahrenheit temperature unit for top display.
Celsius temperature unit for bottom display.
Fahrenheit temperature unit for bottom display.
Minute time unit for bottom display.

ENGLISH 6/12
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.
2.4 Connections
The instrument is designed for the following connections (cf. Fig. 1):
POS Description
Connection of black test cable -
Connection of red test cable +
Connection of RS232 cable
Note that all PC-equipment, which are connected to the
calibrator must observe the directive IEC950.
2.5 Calibrator functions - overview
The instrument’s functions are divided into hierarchical groups. See
the key diagram in Fig. 3.
2.6 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 turned 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.

7/12 ENGLISH
2.7 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.

ENGLISH 8/12
2.8 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.

9/12 ENGLISH
2.9 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.

ENGLISH 10/12
CALIBRA
TION
INSTR
UMENT
S
3.0 Setting the main voltage and replacing
the fuses
Warning
• 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.
Locate the main fuses in the fuse box in the power control
switch and 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 voltage of the power control switch.
Open the lid of the fuse box using a screwdriver.