Hach-Lange 3400 sc - Manual (Page 23)

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Operation
4.6 Calibration
Each contacting conductivity sensor has a unique zero point and offset. Always zero the
sensor when calibrating it for the first time. Zeroing provides the best possible
measurement accuracy and eliminates discrepancies between sensor measurements on
two different channels. Zeroing should always be followed by a calibration.
4.6.1 Zero Cal
Zero the sensor if it is being calibrated for the first time. Make sure the sensor is dry before
zeroing.
1. Select the Main Menu.
2. From the Main Menu, select SENSOR SETUP and confirm.
3. Select the appropriate sensor if more than one sensor is attached and confirm.
4. Select CALIBRATE and confirm.
5. Select ZERO and confirm.
6. Select the available Output Mode (Active, Hold, or Transfer) from the list box and
confirm.
7. Move the sensor to air and confirm to continue.
8. The zero calibration procedure will begin and “WAIT TO STABILIZE” will be displayed.
9. Confirm, when the current value and temperature will be displayed.
10. Return the sensor to the process.
DIAG/TEST
PROBE INFO
Display the probe device driver version number, software
version number, or probe 12-digit serial number using this
menu.
SIGNALS
Display the conductivity A/D counts or the temperature output
in Ohms
CAL DATA
Display the
CELL K: 1.00000 (current cell constant),
TEMP ADJ: current temperature offset correction,
ZERO 1: Zero counts for gain 1,
ZERO 2: Zero counts for gain 2,
ZERO 3: Zero counts for gain 3
4.5 SENSOR SETUP Menu
SELECT SENSOR (if more than one sensor is attached)