Calibrating The Relative Cell Constant - JUMO 202550 Operating Instructions Manual

18.7 Calibrating the relative cell constant

General
Manual
entry
Initial
condition
Procedure
18.7.1 Automatic determination of the relative cell constant with a
calibration solution
You will need
Initial condition
Procedure
The relative cell constant K
the real cell constant over the range from 80 to 120% of the nominal cell
constant.
If the deviation of the cell constant from the nominal value is known, then the
relative cell constant K
The operating level is unlocked,
"Unlocking the levels", page 27.
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 "CELL" appears in the lower display.
PGM
Use the and
Press the key (confirmation).
PGM
Press the key (return to the measurement mode).
EXIT
If the cell constant is not known, it can be determined and automatically
stored:
- A calibration solution, with a known conductivity at the prevailing
temperature.
- A thermometer, if you want to use manual compensation.
- A Pt100 or Pt1000 temperature probe (not necessary if the conductivity cell
is equipped with an integrated temperature sensor), if you want to use
automatic temperature compensation.
A conductivity cell is attached to the JUMO dTRANS Az 01, as well as a Pt100
or Pt1000 temperature probe (if required),
Chapter 18.1 "Conductivity measurement circuit", page 48ff.
The calibration procedure has been configured to "Calibration of the cell
constant, process value output ..." – frozen or not frozen,
Chapter 26.4 "Controller options - C211", page 76.
The instrument is in the measurement mode, see
"Operating modes and states", page 24.
Unlock the instrument for calibration,
18 Conductivity indicator
can be used to compensate for the deviation of
rel
can be entered manually:
rel
keys to set K (in %).
rel
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