Calibration; About Calibration - Horiba Scientific LAQUAtwin B-74 Series Manual

5

Calibration

5.1

About calibration

 Calibration points
The following 3-type calibrations are available.
 One-point calibration in high concentration:
for high concentration measurement
 One-point calibration in low concentration:
for low concentration measurement
 Two-point calibration:
for high accuracy measurement
"One-point calibration in high concentration" is set by default.
Refer to the instructions on page 21 for switching the calibration points.
The calibration point setting and calibration result are saved after the meter
is turned OFF.
Tip
Two-point calibration is recommended especially if the concentrations
of sample and standard solution differ by more than 10-fold.
 Precautions for calibration
 If remains blinking and Err (error display)
appears, the calibration is failed.
Check that the standard solution concentration
is correct, and perform calibration again after
cleaning the sensor well.
 If the calibration is failed using correct standard solution(s), the sensor
may be deteriorated. Replace the sensor with new one (part No.:
3200459870).
 In two-point calibration, confirm that the calibration operations are
completed respectively for low and high concentrations.
The calibration operation for high concentration cannot start until the
calibration for low concentration is completed, and the whole calibra-
tion sequence is not completed until the calibration for high concentra-
tion.
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