Chapter 1: Features And Capabilities; Introduction; Electronics Unit - GE Moisture monitor series 3 Programming Manual

Introduction

Electronics Unit

Features and Capabilities
The GE Sensing Moisture Monitor MMS-3 is a one- or two-channel
analyzer designed to measure dissolved moisture concentration in
gases and non-aqueous liquids, and dissolved oxygen concentration
in gases.
A microprocessor-based instrument, the MMS-3 combines hardware
and software to make various measurements. The user connects the
needed inputs (moisture probes, pressure transmitters, oxygen cells,
etc.) to the back panel of the electronics unit using the appropriate
cables. Typically, the user installs moisture probes and oxygen cells
into the process using a sample system that is specifically designed
for the application. The sample system delivers a sample of the
process gas or liquid to the probes. The probes then send signals to
the MMS-3 electronics unit, which interprets the signals and converts
them into measurements.
The complete analyzer, including electronics, cables and
measurement probes, forms a "system" that is designed to monitor the
process accurately and reliably. The following sections discuss each
part of this "system."
The center of the "system" is the electronics unit. The electronics unit
has many components, including the terminal blocks for all
connections, an RS232 port, a Liquid Crystal Display (LCD), a
keypad, and menu keys (see Figure 1-1 on page 1-2). The MMS-3 is
also available with an optional battery pack.
The back panel of the electronics unit consists of the terminal blocks
for connecting moisture probes, oxygen cells, recorders and optional
alarms (standard or hermetically sealed). The MMS-3 also provides
connections for two isolated outputs per channel. Input connections
for the M and TF Series moisture probes, as well as the Delta F
oxygen sensors, are intrinsically safe.
As an optional feature, the MMS-3 provides connections for two
auxiliary inputs (not intrinsically safe) for each channel. The auxiliary
inputs can accept signals from any 0/4 to 20-mA or 0 to 2-VDC
device, including other GE Sensing analyzers.
The RS232 port enables the user to connect a remote terminal, printer,
or computer to the MMS-3. Using an optional PanaView™ software
package, the user can also set up and operate one or more analyzers
from a remote location, program user functions, transfer data, and
create data logs.
March 2008
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