Matrix Functions; Display And Output Mode - GE DewPro MMY31 Installation And Operation Manual

Matrix Functions

Display and Output Mode

Function Location
Dew Point
VH 00
Display
Selecting the
VH 01
Device Unit
Loop at Fault VH 07
Selecting the
Analog
VH10
Output Offset
(4 mA)
Selecting the
Analog
VH11
Output Span
(20 mA)
Setting the
Span Value
VH 12
for the
ppm Range
v
Optional Display/User Interface
This section describes the functions available to the user through the
matrix, grouped by common function areas (refer to Table 4-1 on
page 4-3). Each function is accessed by moving to its specified
location within the matrix.
Table 4-2: Display and Output Mode Functions
This is the normal display of the transmitter when in operation. The
dewpoint is shown in °C or °F, or ppm
Selects units to be displayed. Changing from °C to °F does not change
the current loop. Changing from dewpoint to ppm
current loop.
Note: When switching to ppm
if the dewpoint reading is above -20°C. (For example, the DewPro is
exposed to ambient air.)
If any fault malfunction occurs, the loop can be set to either "-10%"
(=3.6 mA), to "110%" (=22 mA) or "Hold" (stays at last valid value).
The dewpoint value corresponding to the analog output offset (4 mA)
is entered here. Default: –90°C
Caution: Ensure the dewpoint value in VH10 is always at least 20°C
below the value assigned to 20 mA.
The dewpoint value corresponding to the analog output span (20 mA)
is entered here. Default: +10°C.
Caution: Ensure the value in VH11 is always at least 20 °C above
the value assigned to 4 mA.
Selection of this field sets the span value for the ppm-v range.
Default: 100.
Note: The offset is always 0 ppm
Description
as selected under VH 01.
v
does change the
v
, the display may indicate an error "3"
v
. Do not exceed 1000 ppm
v
September 2005
.
v
4-5