GE MG-101 User manual

GE
Measurement & Control Moisture
910-115 Rev. E
March 2012
MG-101
User’s Manual

www.ge-mcs.com
©2012 General Electric Company. All rights reserved.
Technical content subject to change without notice.
GE
Measurement & Control
MG-101
Field Moisture Calibration System
User’s Manual
910-115 Rev. E
March 2012

ii
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MG-101 User’s Manual iii
Preface
Information Paragraphs
•Note paragraphs provide information that provides a deeper understanding of the situation, but is not essential to
the proper completion of the instructions.
•Important paragraphs provide information that emphasizes instructions that are essential to proper setup of the
equipment. Failure to follow these instructions carefully may cause unreliable performance.
•Caution! paragraphs provide information that alerts the operator to a hazardous situation that can cause damage to
property or equipment.
•Warning! paragraphs provide information that alerts the operator to a hazardous situation that can cause injury to
personnel. Cautionary information is also included, when applicable.
Safety Issues
WARNING! It is the responsibility of the user to make sure all local, county, state and national codes,
regulations, rules and laws related to safety and safe operating conditions are met for each
installation.
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working Area
WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As equipment
can move suddenly and without warning, do not enter the work cell of this equipment during
automatic operation, and do not enter the work envelope of this equipment during manual
operation. If you do, serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out before you
perform maintenance procedures on the equipment.
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the equipment.

Preface
iv MG-101 User’s Manual
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
GE Measurement & Control is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE)
take-back initiative, directive 2002/96/EC.
The equipment that you bought has required the extraction and use of natural resources for its production. It may
contain hazardous substances that could impact health and the environment.
In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle most of the
materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please contact your local or regional
waste administration.
Visit http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/1741-weee-req.html for
take-back instructions and more information about this initiative.

MG-101 User’s Manual v
Contents
Information Paragraphs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Safety Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Auxiliary Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Environmental Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Chapter 1. General Information
1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Theory Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Initial Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.1 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.2 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.3 Operating Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2. Setup and Operation
2.1 Preliminary Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.2.1 Calibrating the Moisture Samples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.2.2 Using Data Table 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2.3 Using Data Table 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.2.4 System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.2.5 Preparation for Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Chapter 3. Specifications
3.1 Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.2 Operating Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.3 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Appendix A. Supplemental Information
A.1 Formulas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
A.2 Typical Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
A.2.1 Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
A.2.2 Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
A.3 Vapor Pressure and Calibration Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Contents
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MG-101 User’s Manual 1
Chapter 1. General Information
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.

Chapter 1. General Information
2MG-101 User’s Manuall
1.2 Theory of Operation (cont.)
As shown in Figure 1 below, dry nitrogen enters at the dry gas inlet A, passes through the fixed internal pressure
regulator, and splits into the following three streams:
•B- dry gas “first dilution”
•C- wet gas
•D- dry gas “second dilution”
Stream B(the dry gas “first dilution”) is mixed with stream C(the wet gas) after it passes through the saturator bottles
to form a “Wet gas diluted” mixture (stream E). This is then mixed with stream D(the “dry gas second dilution”) to
generate the desired output mixture (stream F).
Obtaining an accurate output mixture requires careful adjustment of the rotameter valves as described in “Setup and
Operation” on page 5. Calibration of all rotameters and the thermometer is traceable to NIST standards.
Note: The rotameter scales are used in later steps to reference a lookup table. By themselves, they do not indicate
units of flow.
Figure 1: Flow Schematic
Regulator
Pressure
Dry Gas
Inlet
A
Dry Gas
Wet Gas
Flowmeter
5µ Filter
Temp
Saturator
Bottle
Gas
Outlet
BC
D
E
First Dilution
Flowmeter
Dry Gas
Second
Dilution
Flowmeter
Wet Gas
Diluted
Flowmeter
F
Vent Valve
Dry Down
Valve