N non – Ashcroft GC52 - Rangeable wet/wet Differential Pressure Transmitter User Manual

Page 4

1.. UPON POWER-UP the unit enters “Measure Mode” – displaying applied pressure.
2

2.. TWO FUNCTION is available to the user in “Measure Mode”.

Zero Adjustment Mode: In the measurement mode,
the pressure connection is open to the atmosphere and $ key is
pressed for more than 3 seconds in order to shift to zero adjustment
mode for zero point adjustment of the differential pressure sensor

• If the zero point adjustment is performed correctly the message “ADJ”

will be displayed for 2 seconds, and the display will return to the meas-
urement mode.

Key Lock

Function

Key Manual

Indicator

Setting of key lock

MODE+

one second

LoC (Key invalidity)

Release of key lock MODE+

one second

UnL (Key invalidity)

Operation during keylock

Function

Key Manual

Indicator

Zero adjust. mode

key greater than 3 sec LoC (Key invalidity)

Hold value reset

key greater than 3 sec LoC (Key invalidity)

3.. FIVE FUNCTIONS available to the User via “Setting Mode”. To enter the “Set-

ting Mode” hold (M) key for more than 3 seconds.
(See last page for complete Setting Mode menu.)

Filter (Damping)
The filter is based on the moving average of the pressure data to de-
crease display “bounce” and to smooth the analog output due to system
pressure fluctuations at the user’s discretion.

Five selections: (0, 2, 4, 8 and 16 seconds), Use $ #
keys to change value.

If “0” is selected the filter is not applied.

Re-scaling in “inH

O” units: “Pressure Display Mode” allows for zero

(4mA) and span (20ma) adjustment of –10 to +110% Span respectively.

Note: 1. See menu schematic on last page for detail.

2. Must be in “Pressure Display Mode” option within “Setting Mode,”

this is noted on the screen by

Use $ # keys to move between “Pressure Display Mode” and
“Linear Display Mode” which is for re-scaling in “Arbitrary” units.

Note: Holding the button for more than
3 seconds returns to display mode.

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