TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 –4
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
What’s in the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –6
Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 12
Powering On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Selecting a Parameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 –8
General Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 –9
Recalling Stored Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setting Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 11
Measuring Moisture Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 12
Checking Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operating & Maintenance Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Return for Repair Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
INTRODUCTION
Thank you for purchasing General Tools & Instruments’ (General’s) RHMG650 9-in-1 Thermo-
Hygrometer/Moisture Meter. Please read this user’s manual carefully and thoroughly before using
the instrument.
The RHMG650 is a handheld instrument that will prove useful to four groups of users: water
damage restoration contractors, HVAC/R system installers and technicians, facility maintenance
professionals and electronics manufacturers.
The first three groups will exploit the meter’s ability to measure, display and store/recall six
condensation-related parameters: temperature, relative humidity (RH), absolute humidity, dew
point, atmospheric pressure and vapor pressure. The meter’s large, primary readouts of each of
the last five parameters are accompanied by a smaller, secondary readout of the first parameter:
ambient temperature. The six parameters measured, monitored and displayed by the RHMG650
are most valuable in water damage remediation and the following two applications:
•
Environmental monitoring
of office buildings, greenhouses, food and equipment storage
facilities, wineries, freezers, shipping containers, HVAC/R installations, computer rooms, labs,
libraries, museums and saunas.
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