3nh HG Series Operation Manual - Page 7

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3nh HG Series Operation Manual
power-off is manually, it will calibrate automatically when turn on next time. If
the last power-off is automatic after 5 minutes backlight off, then it will not
calibrate automatically when turn on next time.
When operating environment change (such as the rapid change of
temperature, altitude and humidity), it must do calibration. In order to ensure
the accuracy, please use the original standard plate for calibration. The dust on
the standard plate will affect calibration accuracy. Please clean the standard
plate and ensure it's clean when calibrating.
The Standard plate is a precise optical component. Please avoid it from strong
sunlight. Due to environment factors, the gloss value of standard plate will
change over time. Therefore, it's better to send it back to the factory or
qualified local National Institute of Metrology for the calibration. (Once a year)
Attention:
a) Each instrument has the only calibration plate. If use other calibration plate
to pass the calibration, the measurement is also not accurate. Therefore,
before calibrating, please check whether the serial number of the
instrument is the same with that on the calibration plate.
b) Before calibrating, please make sure the instrument and calibration plate is
tightened. Otherwise, the calibration maybe failed and the measurement
results may not accurate.
Change Calibration Values
Users can change instrument calibration value through QC software.
Attention: Modify calibration value is better operated by manufacturer or
qualified metrological institutes. The calibration value needs to be modified
only when it is different from the actual calibration plate value. Before
modifying the standard value, please backup the original standard value.

2.3 Measurement

The measuring mode is basic mode (Figure 4).
Basic mode is a basic sample test mode which will display the glossiness
value directly. It belongs to single measurement. The results will be saved
automatically each time (except for certain models). It can display multiple sets
of test data simultaneously.