Ashcroft GC51 - Industrial Rangeable Pressure Transmitter - Manual (Page 23)

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12. ZERO ADJUSTMENT MODE
When in Measurement Mode the zero reading can be adjusted. To adjust
the zero reading be sure the pressure connection port (or the system to
which it is connected) is open to atmosphere and hold the UP $ button for
more than 3 seconds. This is not to be used for scaling of the output, refer
to Section 11.2 and 11.3 for scaling function.
• 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.
• If zero point adjustment has been attempted when the pressure is outside
of ±10%F.S. the error message “E-0” will be displayed for 2 seconds, and
the display will return to the measurement mode without completing the
zero point adjustment.
It is important to perform the zero adjustment when the user is certain that
the device is at atmospheric pressure otherwise an offset may be intro-
duced which will impact the accuracy of the device.
13. S ETTING MODE
The setting mode includes access to pressure display mode and linear display
mode. In addition loop check (section 13.4) can be performed in each mode.
13.1 Setting Items for Pressure Display Mode (Re-scaling in “psi” units)
Set the filter before setting the pressure setting mode
–15%F.S. (–15 psi) or less –115%F.S. (115 psi) or more
–5%F.S. or less 105%F.S. or more
-fff fff
105.0 ..... 005.0
• Range Over
display
Normal
message Error
message
• Span Over
display
AdJ e-0