Hach-Lange SI794 I User Manual - Manual (Page 82)

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The measurement process is only interrupted briefly. During
product calibration the sensor remains in the process.
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 sam-
ple is measured in the lab or directly on the site using a portable
meter. The measured sample value is then entered in the trans-
mitter. The new cell factor is calculated from these two values.
If the sample is invalid, you can take over the value stored dur-
ing sampling. In that case the old calibration values are saved.
Afterwards, you can start a new product calibration.
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 store value.
Press enter to proceed.
If an invalid code is
entered, the trans-
mitter returns to
measuring mode.
Now the sample
can be measured in
the lab.
Product calibration
Calibration by sampling
Display (approx.
3 sec)