Chapter 1: Features And Capabilities - GE PM880 Operations & Installation Manual

August 2003
Chapter 1
Features and Capabilities
The Model PM880 is a microprocessor-based portable single-
channel hygrometer designed to measure dissolved moisture
concentration in gases and non-aqueous liquids. This highly-
advanced industrial analyzer is adaptable to many applications,
and is certified intrinsically safe for use in hazardous locations.
The PM880 combines the use of hardware and software to make a
variety of measurements. First, a user connects a moisture probe
(with an optional temperature thermistor or pressure transducer)
to the top of the meter using several types of cables. The user then
installs the probe into the process using a sample system. The
sample system delivers a sample of the process to the probe; the
probe then sends a signal to the PM880, which interprets the
signal and converts it into a moisture measurement.
The complete analyzer, including the hygrometer, cables and
measurement probes, forms a "system" designed to monitor a
process accurately and reliably. The following sections discuss
each part of this system.
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