Residium PMT II Mode D'emploi page 11

Calibration
All testers have been calibrated during the manufacturing
process and no further adjustment or user intervention to
the unit is required.
Self-calibration should not be attempted. To minimize any
risks associated, users should contact Presidium at
service@presidium.com.sg or its service center for
assistance. In the event that users require the
manufacturer to re-calibrate the unit, the users will bear
the associated to/fro freight cost for the shipping of unit to
the service center.
Recommended testing conditions
The gemstone should be clean and dry before testing.
However, elaborate cleaning procedures are not normally
necessary (Fig. 1.6).
Fig. 1.6
The recommended testing temperature is 18°C – 27°C or
65°F- 80°F Please allow the gemstone or jewelry piece
to adjust to room temperature prior to testing.
Exposure and/or operation of the tester outside the room
temperature would affect the results and performance of
the tester.
Battery information
Do not leave worn out batteries in the battery
compartment as the batteries may corrode, leak or
damage the tester. Batteries should be removed when
the instrument is expected to be stored for an extended
period of time.
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