Manual Control Measurement; Absolute White Calibration - GMB Spectrolino Operation Manual

Spectrolino
3
operation
14
EN
3.4.1

Manual control measurement

3.4.1.1 Absolute white calibration

Rest the Spectrolino on the calibration plate (19) with the white reference incorporated
(17), so that the measuring equipment is correctly inserted on the positioning pins (20).
Keep the measurement key (10) pressed for four seconds, until the device confirms
successful calibration by means of an acoustic signal. This signal consists of three
tones: one short low tone, one high long tone and finally another short low tone.
Calibration of the Spectrolino is always an absolute white calibration. If the device has
been set by software to paper references, during calibration it switches back to the
absolute white reference.
- Ensure that the white reference serial number coincides with the serial
number of the Spectrolino .
- Regularly check the cleanliness of the white reference.
- Calibrate the Spectrolino at least once a day.
- If numerous measurements are undertaken in rapid succession, after
about 100 measurements, it is necessary to recalibrate the Spectrolino.
If frequently switched on, the device's measurement lamp tends to
overheat; this may cause colour shift. Through calibration, measurement
results may be kept constant.
- If subjected to thermal oscillation greater than 5°C, the Spectrolino must
be recalibrated.