DewPro MMY245
Installation and Operation Manual
GE General Eastern
11
2.4.3.2 Quality Assurance
Quality checks of gas supplies can be made easily with the MMY 245. The basis for the measurement
should be established prior to making any actual readings. Typically the readings for gas quality are
made in ppmv and the instrument can be configured to provide this information accurately. The
parameters of pressure are important to making any concentration measurement so the instrument can
be configured properly. A review of the quality specifications between the supplier and the user is
helpful to determine acceptable moisture measurement practice.
2.5 Instrument Setup / Programming
In addition to preparing the hardware for connection to process fittings, the analyzer should be checked
for the proper operation. Configuring the MMY 245 is made simple using a matrix format. The diagram
for the matrix is located on the rear panel of the analyzer (See Figure 5). The 10 X 10 matrix contains
all the operating parameters for properly displaying and calculating the correct value in the appropriate
unit of measure. The control functions for the outputs and interface connections are easily set by
moving through this matrix and selecting the appropriate values for each cell. The following section
describes the features and usage of the various matrix locations as they apply to the MMY245.
2.5.1 Matrix Orientation
The display of the DewPro
MMY245 shows the current matrix location at all times, using the vertical
(V or row) and horizontal (H or column) coordinates. (Note: A matrix programming card, similar to the
one shown in Figure 5 is mounted to the outside of the enclosure).
Example: The position for the unit of measure selection is location V0H1. (See Figure 5.)
Movement through the matrix is accomplished by using the “
V
” and “
H
” buttons to move to another
row or column. For example, beginning at
V0 H0
and successively pressing “
V
”, leads the user to
V1
H0
,
V2 H0
,
V3 H0
,
V4 H0
,
V5 H0
,
V6 H0
,
V7 H0
,
V8 H0
,
V9 H0
and back to
V0
H0
. At any location where a value may be changed by the user, the digit to be altered is selected using
the “+” and “-” buttons.
