GE Moisture monitor series 3, Programming Manual

Page: 12 / 99

Features and Capabilities 1-5
March 2008
Delta F Oxygen Cell
The
MMS-3
standard oxygen measurement probe is the Delta-F Cell.
Overall oxygen content range measured using this cell is from 0 to
25%. You may choose from seven standard oxygen ranges. The
lowest standard range is 0 to 1/10/100 ppm; the highest standard
range is 0 to 25% oxygen. An ultra-low-range sensor that covers
0-500 ppb
v
and is sensitive to less than 5 ppb is also available. The
MMS-3
can also accept oxygen inputs from other GE Sensing oxygen
sensors using the auxiliary inputs.
If your application has a high concentration of acid-forming
components, GE Sensing supplies a
STAB-EL
option for the Delta F
Cell. The
STAB-EL
option is specially designed to effectively
neutralize these components from the sample gas stream.
The Delta F Cell is available in a general purpose model with both a
top and bottom drain, or only a top drain as shown in Figure 1-4
below. The Delta F Cell is usually installed in its own sample system.
The Delta F Cell is optionally available with VCR
®
fittings, mounted
in a NEMA-4X enclosure for weatherproof corrosion resistant
applications, or mounted in a NEMA-7 enclosure for hazardous areas.
The Delta F Cell is BASEEFA-approved, and when connected to a
BASEEFA-approved
MMS-3
, provides certified intrinsic safety. See
Chapter 3 of the Startup Guide, Specifications, for certification
numbers.
Figure 1-4: Bottom and Top Drain Delta F Oxygen Cells
M a
x
M a
x
M i n
M a
x
M a
x
M i n
Bottom Drain
Top Drain