Chapter 1. General Information; Introduction; Theory Of Operation - GE MG-101 User Manual

Chapter 1. General Information

1.1 Introduction

The MG-101 Field Calibration System is a portable moisture generator used for checking and, if necessary,
recalibrating GE Sensing moisture probes. The MG-101 can generate dew/frost points in the range of -75 to +20°C
(-103 to +68°F) dew/frost point temperature. It is a totally mechanical device requiring only a supply of dry nitrogen,
and it is inherently explosion-proof. Although specifically designed for calibrating GE Sensing moisture probes, the
MG-101 can be used for any application requiring accurate and repeatable moisture samples.

1.2 Theory Of Operation

Precise moisture concentrations are generated by passing dry nitrogen through a water saturator and mixing the
resulting saturated stream with a dry nitrogen stream from the same source, for a first dilution.
This resulting first dilution is then further diluted in a second mixing stage, resulting in dew/frost point temperatures as
low as -75°C (-103°F).
The MG-101 consists of the following components:
•
Pressure regulator
•
Four adjustable rotameters (flowmeters with valves)
•
Saturator bottle
•
Filter
•
Temperature gauge
•
Vent valve
See the diagram and explanation in Figure 1 on page 2 for a description of how the MG-101 works.
MG-101 User's Manual
Chapter 1. General Information
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