Hach-Lange SI792(x) E HACH GLI 3700 series SI792(x) T 7MA2200 and 8398 series User Manual - Manual (Page 75)

Calibration
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8.1.2 Calibration with a calibration solution
Use a calibration solution with a known conductivity value to adjust the
transmitter to show the same value as the solution.
Note: Stabilize the temperature during calibration.
1. Press CAL , enter passcode: 0110, ENTER . CAL SOL will be
displayed for 3 seconds. The transmitter is ready for calibration.
2. Remove and clean the sensor.
3. Immerse the sensor in the calibration solution.
4. Use the
UP ARROW and RIGHT ARROW to enter the known value of
the calibration solution.
Note: If the entry of the calibration solution value takes longer than
6 seconds, the display will alternate between showing the cell
constant and the temperature value.
5. Press ENTER to save the value.
6. The display will show the new cell constant. Press ENTER .
7. The transmitter remains in HoLD mode. Press ENTER again.
The transmitter remains in HoLD mode for approximately
20 seconds after calibration and returns to the measure mode.
The display will show the temperature-corrected value of the
calibration solution (unless temperature compensation is set to off
in the configuration menu).
Note: Repeat the calibration when “Err” is displayed.