Ashcroft GC55 - Differential Pressure Transducer with Digital Display User Manual

Page 14

Entering the setting value in function setting mode resets all of the setting
values including the switch. Please note that when the reset setting values
are out of the display range, they will be adjusted to an upper or lower limit
value that can be processed internally.

switch operation

Select “Switch Operation Selection” with the

key. The message

is displayed for 1 sec. and then the

current setting is displayed. Select either hysteresis or switch operation dis-
play with the

▲▼

keys.

Display section

Select “Display Selection” with the

key. The message

displayed for 1 sec. and then the current setting is displayed. Select
pressure display by PSI

or display scaling (Arbitrary units defied

by user)

with the keys.

Scaling Display of DP (Used for arbitrary unit, user defined, scaling)
When the

is selected in“Display Selection”, the display value of

DP for applied pressure displays as an arbitrary scaling display. This is a
function to scale the min/max display value for DP display and has no effect
on applied pressure and analog output.

Select “Display Scaling of DP with the

key. The message

displayed for 1 sec. and then the current setting mode’s decimal point posi-
tion is displayed. Change the decimal point position value with the

▲▼

keys.

The pressure range min/max value can be set in the same way using the

and

▲▼

keys. The pressure range min/max display values are

stored internally as operation coefficients. When “Display Scaling”

is selected, these coefficients are used for scaling and LED display.

Ex.) With a pressure range of 0 to 150 psid (0 to 100% F.S.), main unit dis-
play of 000.0 to 150.0 (factory set) is changed to a display of 0.000 to 1.000.
(User defined unit, in this case 1MPa)

Dec. point position (from least significant digit):

0.1

→

.003

Min. pressure range value:

0.0

→

.000

Max. pressure range value:

150.0

→

1.000

Filter section

The GC55 is equipped with 5 internal time constant filters. Use this function
when pressure fluctuations can result in erratic, difficult to read displays. The
time constant for the selected filters reflects on the switch outputs as well as
the analog output.

Select “Filter Selection” with the MODE key. The message

is dis-

played for 1 sec. and then the current setting mode’s decimal point position
is displayed. Change the decimal point position value with the

▲▼

keys.

npa

MODE

f1l

d-k

d-l

d-p

MODE

et[

[np

d-p

et[

s[l