Quick Start Function Summary Instructions
for ASHCROFT
®
GC51 Version 6.03
(See Complete I&M Manual for Further Detail)
1. Upon Power-Up the unit enters “Measure Mode” – displaying
applied pressure.
2. Four functions available to the user in “Measure Mode”.
A. Zero Adjustment Mode: Hold the UP
$
button for more than
3 seconds.This is not to be used for scaling of the output.
• 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.
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)
Setting mode M key greater than 3 sec LoC (Key invalidity)
Peak indicator
$
one push Peak indicator
Bottom indicator
#
one push Bottom indicator
C. Minimum Value “Capture”*: Press DOWN
#
button to
display the minimum value. The letter “L” will follow the
reading indicating this is the minimum value. Press the
DOWN button again to return to Measurement Mode.
Note: Press the button and release, do not “hold” the but-
ton down (will reset the values).
© 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. 02/11 I&M011-10163_GC51_Rev. C_Ver. 6.03
D. Maximum Value “Capture”*: Press UP
$
button to dis-
play the maximum value. The letter “H” will follow the
reading indicating this is the maximum value. Press the
UP
$
button again to return to Measurement Mode.
Note: If the button is held for 3 seconds it will go into
zero adjustment mode.
Minimum/Maximum Reset
The Minimum/Maximum values can be reset when in
either Minimum/ Maximum display by holding the DOWN
#
button for more than three seconds, “clr” will appear
on the display for two seconds and the Minimum and
Maximum values will be removed.
Note: Values are maintained even if unit is powered OFF.
Hold reset
message
• When first using unit be sure to Reset values to clear
values in memory from the factory calibration
process.
• Values are captured starting one minute after Reset,
thus if unit is powered OFF during the one minute the
values during that period will not be kept in memory.
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 where 0=30ms (and in
this case the filter is not active), 2=60ms, 4=120ms,
8=240ms, 16=480ms, use
$#
keys to change value.
B. Re-scaling in “psi” units: “Pressure Display Mode”
clr
n non
-
Note: Holding the
3 seconds returns to
Pressure
Unit Monitor
Measured
Data
Arbitrary
Unit Monitor
MODE key
DOWN key
UP key
CH+ CH–
PSI
M
GC51
Test
Terminals
1
2
3
4 5
6
Function
Pressure, linear scaling value, hold value (max./
min), are displayed.
When either indicator is ON, the display is read-
ing in PSI.
When this indicator is ON, the linear scaling value
of an arbitrary unit is indicated on the display.
Used to switch the setting mode, the measure-
ment mode and the setting item.
Used to change (decrease) and select the set
value and to zero-reset the hold function.
Used to change (increase) and select the set
value and to shift from the measurement mode
to the zero adjustment mode.
Designation
Measured Data Display
Pressure unit monitor
Arbitrary unit monitor
MODE button M
DOWN button #
UP button $
DISPLAY OVERVIEW
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 0-100psi
range and the user desired the Output Zero Point
to be “moved” from 0 psi to 50 psi then Output
Zero Point would be 50.0 which is 50%.
I&M011-10163-GC51 QS Rev. c:GC51–Quick Start 2/11/11 3:38 PM Page 1
(32 pages)
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