JUMO CTI-500 Use and care manual

CTI-500
Replacement Sensor for
inductive conductivity/
concentration and
temperature transmitters
with switch contacts
Type 202755
B 20.2755.0.1
Calibration Instructions
03.06/00469148

3
1 Notes
These calibration instructions and the calibration set
(resistance decade) that comes with the replacement
sensor are provided exclusively for the purpose of
calibrating the replacement sensor!
If a transmitter is supplied together with a sensor,
then this combination is factory-calibrated. It is not
possible to recalibrate such a combination using
these calibration instructions and the calibration set.
Please refer to the chapter “Calibration” in the
Operating Manual B20.2755.0 (Part No. 00444870) for
further information.
All necessary settings are described in these
calibration instructions. However, if any difficulties
should still arise during calibration, please do not
carry out any manipulations on the unit. You could
endanger your rights under the instrument warranty!
Please contact the nearest subsidiary or the head
office in such a case.
Please read these calibration instructions before
starting to calibrate.

4
2 Connecting the replacement sensor
see chapter “Installation” in the Operating Manual B20.2755.0
(Part No. 00444870).
3 Calibration
3.1 Requirements
- The supply voltage for the CTI-500 must be present.
see chapter "Installation" in the Operating Manual B20.2755.0
(Part No. 00444870).
- The sensor must be connected to the transmitter.
- The transmitter is in the measurement mode.
✱Press the key for at least 3 seconds.
✱Use the or key to select ADMIN. LEVEL; confirm the
selection with the key.
✱Using the or key, select password 3000; confirm the
PGM
PGM

5
selection with the key.
- LEDs K1 and K2 blink.
✱Pass the cable of the calibration set through the sensor opening.
The calibration program will ask you to connect the first calibration
resistor. The first calibration resistor is an open loop, as shown in
the picture.
Press the key
The transmitter now calibrates all measuring ranging for a “liquid
with the conductivity 0 mS/cm”. The procedure lasts about 120
seconds (countdown in the display).
PGM
PGM

6
The calibration program will ask you to connect the next calibration
resistor (2, 3, 4 and 5).
✱Push the plug (1) onto the pins (2) of the calibration set, which
are marked correspondingly.
✱Start the next calibration step by pressing .
Once more, there is a countdown in the display
(about 60 seconds).
If an error occurs (e.g. if the plug of the calibration set
was inserted in the wrong socket), a message will be
displayed.
The calibration must then be ended by pressing the
key.
The old calibration data (prior to the calibration
attempt) are retained and will continue to be used.
EXIT
(1) 2435
(2)
PGM

7
Calibration is finished after step 5.
Press the key for about 5 seconds - the calibration values are
accepted and the procedure is concluded.
The calibration values can be rejected by pressing the
key. In this case, the transmitter will operate with
the old values.
PGM
EXIT