Calibrating The Temperature Coefficient - JUMO 202550 Operating Instructions Manual

Manual
entry of the
temperature
coefficient
Initial
condition
Procedure

18.8 Calibrating the temperature coefficient

18.8.1 Automatic determination of the temperature coefficient, using
manual temperature entry
You will need
Initial condition
If the temperature coefficient of the solution being measured is known, then it
can be entered manually.
The configuration level is unlocked,
"Unlocking the levels", page 27, (code word 0300)
The calibration procedure has been configured to "Determination of the
temperature coefficient, process value output ..." – frozen or not frozen,
Chapter 26.4 "Controller options - C211", page 76.
The instrument is in the measurement mode,
"Operating modes and states", page 24.
Press the key twice, for more than 2 seconds, to access the
PGM
configuration level.
The lower display shows "C111".
Press the key repeatedly, until "ALPH" appears in the lower display.
PGM
Use the and
Press the key (confirmation).
PGM
Press the key (return to the measurement mode).
EXIT
The instrument uses the non-temperature compensated measurements (TC =
0) at two different temperatures (the reference temperature of 25°C and a
second temperature, usually that which will be used for later measurements) to
determine the temperature coefficient of the solution being measured.
- A sample of the medium to be measured
- A tempering setup
- A thermometer
The conductivity transmitter is connected to the JUMO dTRANS Az 01
Chapter 18.1 "Conductivity measurement circuit", page 48ff.
The temperature acquisition is configured as "Manual temperature
compensation",
Chapter 21.2 "Analog inputs - C111", page 61.
The calibration procedure has been configured to "Determination of the
temperature coefficient, process value output ..." – frozen or not frozen,
Chapter 26.4 "Controller options - C211", page 76.
The instrument is in the measurement mode,
18 Conductivity indicator
keys to set the temperature coefficient (in % per °C).
55