Pressure Transmitter - GE Moisture monitor series 3 Programming Manual

March 2008
M Series and TF Moisture
Probes (cont.)

Pressure Transmitter

1-4
Figure 1-3: TF Series Probe
Although the M and TF Series probes may be installed directly into
the process line, they are usually inserted into a sample system. The
sample system protects the probes and enables the user to easily
remove the probes for calibrating, servicing, and cleaning. Sample
systems also control the flow of the process stream so that it is within
the specifications of the measurement probe or cell.
The M and TF Series probes, when operated with a BASEEFA-
approved MMS-3, are intrinsically safe (see Chapter 3, Specifications,
in the Startup Guide, for BASEEFA certification numbers) and are
designed to meet requirements of IEC/CENELEC zone 0 areas.
The M and TF Series probes measure moisture content in a standard
range from -110°C to 20°C (-166°F to 68°F) dew/frost point
temperature, and optionally from -110°C to 60°C (-166°F to 140° F).
Both probes optionally measure temperature in a range of -30°C to
70°C (-22°F to 158°F).The TF probe optionally measures pressure
from 30 to 300, 50 to 500, 100 to 1000, 300 to 3000, and 500 to 5000
psig.
In addition to the M Series probe, a separate pressure transmitter may
be needed for on-line pressure measurement. Pressure measurement
is a necessary input for conversion to certain moisture parameters,
such as parts per million by volume water vapor in a gas. The
MMS-3 can use any pressure transmitter with a 0/4 to 20 mA or 0 to 2
V output. Additionally, constant temperature and pressure can be
programmed into the MMS-3 if these process conditions are constant.
Temperature measurement is a necessary input for conversion to
certain moisture parameters, such as parts per million by weight water
vapor dissolved in a liquid. It is also necessary so maximum
temperature/pressure conditions are not exceeded.
Features and Capabilities