Hach-Lange POLYMETRON 8398 User Manual
Page 13
Inductive Probe 8398
10
REMARK: After returning to measurement mode, the value displayed by the
transmitter takes account of the cell constant and also of
temperature compensation.
Example: 200
Ohms on decade box, T
=
20
°C, transmitter set for 25
°C
compensation with a coefficient of 2 %, unit mS/cm:
DISPLAY: [2.35/200]. [1 + 0.02
u (20 - 25)]
-1
=
13.06 mS/cm (c.f. Ch. 2-1)
Process calibration (9125 only):
During the first calibration of the chain, process calibration must be performed at two
distinct points (probe in air, then in the control solution).
After this, calibration can be performed on a single point (control solution only).
WARNING: If you are using a 9125 with software version < 1.12, the cell
constant value must be set prior to calibration.
Any alteration of the cell constant value after calibration would cancel the
calibration for this probe (slope reset to 100 %).