Ashcroft GC52 - Rangeable wet/wet Differential Pressure Transmitter - Manual

1. Upon Power-Up the unit enters “Measure Mode” – displaying
applied pressure.
2. One 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 measurement mode.
3. Four functions available to the User via “Setting Mode”. To
enter the “Setting 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 decrease 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.
(See I&M Manual for Further Detail)
Quick Start Function Summary
Instructions for ASHCROFT
® GC52
© 2008 Ashcroft Inc., 250 East Main St., Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com
All sales subject to standard terms and conditions of sale. 12/08 I&M011-10064-GC52
B. Re-scaling in “inH
2
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.
3. To adjust Output Zero Point (4mA) and Output
Span Point (20mA) must be in the functional area
as noted below and then adjustment is via $ #
keys. The value shown is a percentage of the
pressure range (span) as noted on the product
label (ex. If product was supplied as a 0-40 IWC
range and the user desired the Output Zero Point
(4mA) to be “moved” from 0 IWC to 20 IWC then
Output Zero Point would be 50.0 which is 50%.
a 90.0
a 10.0
n non
-
n non
-
Note: For setting of zero point and span point in the analog
output, input the percent value over the pressure range.
n L;n
-
C. Re-scaling in “Arbitrary” units, “Linear Display Mode.”
This function allows the user to establish a linear relation-
ship from the standard “inH
2
O” unit to any user defined unit.
Note: See menu schematic on last page must be in
“Linear Display Mode” option within “Setting Mode”, this
is noted on the screen by
Use $ # keys to move between “Linear Display Mode”
and “Pressure Display Mode.”
Setting LCD Setting Setting
Item Display Description Range
Display Selection of non:pressure
mode pressure display display mode
mode : non Lin: linear
display mode
Output Analog Pressure
zero point output zero point range:–10
(4mA) : 10.0 (%Span) to 110% Span
.
Output Analog Pressure
span point output span point range:–10
(20mA) : 90.0 (%Span) to 110% Span
CH+ CH–
GC52
In H 2 O
M
▼ ▲
Differential pressure
unit monitor
Test Terminals
MODE key
DOWN key
UP key
Scaling - Arbitrary
unit monitor
Measured data
display
8.8.8.8.8.8. ቢ
ቧ
ቤ
ባ
ቦ
ብ
DESIGNATION FUNCTION
ᕡMeasured data
display
ᕢDifferential
pressure unit
monitor
ᕣScaling; arbitrary
unit monitor
ᕤMODE key
M
ᕥDOWN key
S
ᕦUP key
T
Differential pressure, linear scaling value are displayed.
When this unit monitor is ON, the differential pressure (in
H
2
O) is indicated on the measured data display.
When this unit monitor is ON, the scaling value of an arbi-
trary unit (linear scaling), is indicated on the measured
data display.
This key is used to switch the setting mode and the mea-
surement mode and to change the setting item.
This key is used to change (decrease) and select the set
value .
This key is used to change (increase) and select the set
value and to shift from the measurement mode to the zero
adjustment mode.
Note: Holding the
3 seconds returns to
DISPLAY OVERVIEW
Values shown below are from I&M manual.
ᕡ
ᕢ
ᕦ ᕤ
ᕥ
ᕣ
I&M011-10064-GC52-Quick Start:GC52–Quick Start 6/22/09 10:05 AM Page 1