Ashcroft GC52 - Rangeable wet/wet Differential Pressure Tra Manual do Utilizador descarregar pdf (Página 4)

11..

UPON

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

22..

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

A. 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.

B. 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)

33..

VE 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.)

A. 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.

B. 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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