Berthold LB 444 - Checking the Calibration; One-Point Calibration; Two-Point Calibration

Density Meter LB 444 SECTION 6. BASICS OF DENSITY MEASUREMENTS
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Checking the Calibration
6.2.1.1 One-Point Calibration
1. The absorption coefficient entered in Result a1 must remain unchanged.
Also, check the data in the following code numbers:
Display Value
Coefficient a2 0
Coefficient a3 0
Factor 1
Offset 0
Square error 0
If one of these values differs, please check your calibration.
2. With
negative
absorption coefficient (Result a1):
The countrate calculated as zero rate I0 must be
higher
than the read-in
countrate.
3. With
positive
absorption coefficient:
The countrate calculated as zero rate I0 must be
lower
than the read-in
countrate.
6.2.1.2 Two-Point Calibration
After calibration the following values should be displayed:
Display Value
Coefficient a2 0
Coefficient a3 0
Factor 1
Offset 0
Square error 0
If other values should be displayed, check your calibration or the data you have
entered.