Two-Point Calibration - Horiba Scientific LAQUAtwin B-74 Series Manual

5.4

Two-point calibration

1.
Set "Two-point calibration" (refer to page 21).
2.
Open the light shield cover and put some drops
of the low-concentration standard solution on
the flat sensor to cover the entire flat sensor.
Washing the sensor with the standard solution
beforehand may provide more accurate calibration.
3.
Close the light shield cover and press the CAL
switch for over 2 seconds.
and
displayed.
After the calibration is completed,
stop blinking and light steadily.
4.
After the calibration for low concentration
is completed, open the light shield cover
to remove the low-concentration standard
solution and wipe off moisture on the
sensor.
5.
Put some drops of the high-concentration
standard solution on the flat sensor to cover
the entire flat sensor.
Washing the sensor with the standard solution
beforehand may provide more accurate calibration.
6.
Close the light shield cover and press the CAL
switch for over 2 seconds.
and
displayed.
After the calibration is completed,
stop blinking and light steadily.
7.
Clean the sensor with tap water and
remove moisture.
8.
Press the MEAS switch for 0.5 seconds to enter the measurement
mode and prepare for measurement.
blink and the calibration value is
blink and the calibration value is
and
and
12
Light shield
cover
Light shield
cover