11 Checking, Adjusting and Calibrating the Instrument
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C76IB003EN-E
11 Checking, Adjusting and Calibrating
the Instrument
11.1 Definitions
Checking
Checking the correct state of operation of an instrument by measuring a sample
of exactly known measurement properties and comparing the result with the
expected values.
Adjusting
Enabling correct measurements in the future by injecting a sample of exactly
known measurement properties (standard) and adjusting the instrument
constants in a way that the known correct results are found by the instrument.
Usually at least two standards are needed with measurement properties that
encompass the expected measurement results of your samples for a successful
adjustment.
Calibrating
Calibrations are checking procedures which are carried out using certified
standards. By comparing the measured result with the standard reference value,
you can validate the quality of your measurements.
11.2 Checks
11.2.1
Editing the Check Settings
You can edit the name, method (custom check only), time interval and the
tolerance of density checks.
Tolerance
The factory presets for the check tolerance for both air and water checks are:
To edit the settings of the Air Check and Water Check
1. Tap <Menu> and select
"Setup > Expert Settings > Check Management"
to open the check administration list.
DMA M Model
Tolerance
DMA 4100 M
0.0002 g/cm
3
DMA 4500 M
0.0001 g/cm
3
DMA 5000 M
0.00005 g/cm
3
