Hach-Lange 1200-S sc - Manual (Page 21)

Operation
19
5.8 Sensor calibration (temperature)
To calibrate the temperature sensor, proceed as follows:
1. Ensure that the correct temperature unit is selected in the
SENSOR SETUP=>CONFIGURE=>TEMP UNITS
menu.
2. Open the SENSOR SETUP => CONFIGURE => T-Sensor menu and choose
MANUAL.
3. Immerse the probe for a minimum of 10 min. in a reference solution while
monitoring the temperature of the solution with a thermometer (measuring
accuracy
± 0.1 °C).
4. Compare the temperature displays on the sensor and the thermometer.
5. Enter the value on the thermometer in the controller.
6. Wait until the value displayed has stabilised and accept.
7. The correction factor is calculated and the temperature values will in future be
displayed correctly.
5.8.1 Calibrating two sensors simultaneously
1. Start by calibrating the first sensor and when you arrive at the point at which
you are prompted to "PRESS ENTER WHEN STABLE".
2. Press the BACK key.
3. Select LEAVE and press accept. The display returns to the display of the
measurements. The measured value for the sensor to be calibrated starts to
flash.
4. Start the calibration of the other sensor and when you again arrive at the point
at which you are prompted to "PRESS ENTER WHEN STABLE".
5. Press the BACK key.
6. Select EXIT and press accept. The display returns to the display of the
measurements. The measured values for both sensors start to flash.
7. To return to the calibration menu for the individual sensors, open the main
menu, select SENSOR SETUP and accept. Choose the required sensor and
accept.
8. When calibration is complete, accept.