Hach-Lange SI794 C User Manual - Manual (Page 78)

78
For product calibration the measured variable is used as configured:
Conductivity (µS/cm, mS/cm, S/m), resistivity (MΩ·cm). During product
calibration the sensor remains in the process. The measurement is only
interrupted briefly.
Calibration is without TC correction.
Procedure: During sampling the currently measured value is stored in
the transmitter. The transmitter immediately returns to measuring mode.
The calibration mode indicator blinks and reminds you that calibration
has not been terminated.
The sample is measured in the lab or directly on the site using a portable
meter. The sample value is then entered in the transmitter. The new cell
constant is calculated from these two values.
If the sample is invalid, you can take over the value stored during
sampling. In that case the old calibration values are saved. Afterwards,
you can start a new product calibration.
Product calibration
Calibration by sampling
Display Action Remark
Product calibration step 1:
Press cal, enter code: 1105.
(Press 4 key to select position,
enter number using 5 key.
Press enter to confirm.)
Take sample and save value.
Press enter to proceed.
If an invalid code is
entered, the trans-
mitter returns to
measuring mode.
The sample is mea-
sured in the lab or
directly on the site.
Display (approx.
3 sec)