GE DewPro MMY30, User Manual

Page: 29 / 47

November 2005
4-4 The Optional Display/User Interface (Option G)
Display and Output Mode
1.
Dew Point Display
2.
Selecting the Unit of Measure
3.
Loop at Fault
4.
Selecting the Analog Output Offset (4 mA)
Caution!
Ensure the dewpoint value in VH10 is always at least 20°C
below the value assigned to 20 mA.
Location
in Matrix Description of Function
VH
00
This is the normal display of the transmitter when in
operation. The dewpoint is shown in °C or °F, or
ppm
v
as selected under VH 01.
Location
in Matrix Description of Function
VH
01
Selects units to be displayed. Changing from °C to °F
does not change the current loop. Changing from dew-
point to ppm
v
does change the current loop.
Note:
When switching to ppm
v
, the display may
indicate an error “3” if the dewpoint reading is above
-20°C. (For example, the DewPro is exposed to ambi-
ent air.)
Location
in Matrix Description of Function
VH
07
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).
Location
in Matrix Description of Function
VH
10
The dewpoint value corresponding to the analog output
offset (4 mA) is entered here. Default: -90°C