Page 16 Protimeter MMS Moisture Measurement System
4 Calibration Checking
Check the Moisture meter Measure Mode by holding the pins of the Moisture
Probe across the exposed wires of the calibration check device (Calcheck).
The WME value of correctly calibrated instruments is 17-19. Instruments that
register values outside this range should be returned to GE Sensing (or an
official GE Sensing distributor) for servicing.
Note: Search mode can be checked against a stable area of wall. For
comparative purposes, humidity and ambient temperature conditions
should be stable and consistent.
Working Hygrostick and Humistick probes can be checked against reference
probes and/or over standard salt solutions.
5 Care and Maintenance
The Protimeter MMS is a precision-built electronic instrument that will
provide many years of reliable service if the following points are observed:
• When not in use, keep the MMS instrument and its accessories in the
factory Carry Case. Store the case in a stable, dust-free environment and
keep it out of direct sunlight.
• If the instrument is to be stored for more than four weeks or if the low
battery power symbol appears on the display, remove the batteries from the
instrument.
• When using the MMS in Search mode, do not slide the bulge across
surfaces, as this may lead to rapid instrument case wear. The instrument
should be lifted and placed in position to prevent such wear.
• Check the condition of the MMS accessories on a regular basis, and replace
them if they become worn or damaged.
• To preserve their calibration characteristics, Hygrostick probes should not
be exposed to saturated environments. If this is unavoidable, Hygrostick
probes should be replaced on a regular basis and their calibration should be
checked frequently.
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