horiba LAQUAact D-74, Instruction Manual

Page: 53 / 112

Conductivity measurement
D-74 37
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Performing salinity calibration
The salinity is calculated from the value of the conductivity, however, one point
calibration can be performed using the standard solution. Calibrate at the temperature
indicated on the standard solution.
1. Press the key to change the measurement parameter to salinity.
Refer to “ Changing the measurement parameter ” (page 8).
2. Press the key to enter the calibration mode, and enter the value of the
standard solution to be used for calibration.
The current measured value is displayed on the sub screen.
3. Wash the conductivity cell with pure water (or
deionized water) and wipe it with filter paper or
tissue paper.
Do not touch the black electrode part.
4. Immerse the conductivity cell in the standard
solution.
Immerse in the standard solution up to the hole in
the lower part of the cell.
5. While the conductivity cell is immersed in the standard solution, press the
key.
Stabilization judgment starts and the HOLD icon blinks. When the value is stabilized,
the HOLD icon changes from the blinking state to the lit state and calibration to the set
standard solution value is performed.
key
Stabilized
key