Hach-Lange POLYMETRON 8398 - Manual (Page 12)

Inductive Probe 8398
9
4.3 Use with a 9125 conductimeter
Set the two switches (I/K) inside the instrument to position I.
Check that the measurement type is set to inductive.
5. PROBE
CALIBRATION
REMARK: For more detailed information, see the user instructions of out 9125 and
8921 transmitters. We recommend proceeding in the following order:
‰ Set the cell constant value on your transmitter to 2.35 cm
-1
.
‰ Calibrate your temperature sensor:
Submerge the probe in a solution for approximately 10 min., raise the temperature of
this solution using a thermometer (accurate to
r 0.1°C if possible). Set the transmitter
to process calibration mode, then adjust the temperature value.
‰ Calibrate conductivity (two solutions)
Electrical calibration:
Perform the "electrical" calibration of the probe with a decade box, using a wire no
longer than 50 cm and with a minimum cross-section of 0.38 mm².
The resistance values to use are:
f for zero adjustment (decade box disconnected):
then 200 Ohms (default instrument value) for slope adjustment: