Calibration Of Standard Solution - Horiba Scientific DS-72G Instruction Manual

3.1.2 Calibration of Standard Solution

A verified cell constant is written on a COND electrode label.
However, the actual cell constant may fluctuate depending on the usage circumstances
and it is desirable to calibrate the cell constant in that case.
The procedures of cell constant calibration are mentioned below.
・Perform "3.1.1 Automatic Calibration Setting" (P.35), before the following operations.
・Make sure that the temperatures of the standard solution and the electrode are stable
before the following operations. If you perform the operations with unstable
temperatures, the calibration result may be incorrect.
・Immerse the electrode into the standard solution at the proper depth and stir it slowly
with a stirrer. Do not return the used standard solutions into the original container.
Dispose of them.
on the COND CAL screen allows you to check the current calibration data.
・Tapping
To clear the calibration data, tap
・When auto calibration is turned OFF in "3.1.1 Automatic Calibration Setting" (P.35), it is
necessary to enter the concentration value of the standard solution in accordance with
the settings in " Manual calibration" (P.37).
Automatic calibration
36
.
1.
Tap the channel and measurement item in the
measurement screen to set "CH2" and "COND".
2.
Tap to start the calibration.
When the calibration is completed, the HOLD
indicator is lit up and the calibration state is
displayed.
3.
Tap after checking the calibration result
to return to the CAL screen.
To start the COND measurement, press the
MEAS key.