Honeywell 5704 Operating Instructions Manual page 135

MAN0448_Issue 13_ 01-2010
005704-M-5001 A03249
CHAPTER 5 - COMMISSIONING AND
MAINTENANCE INSTRUCTIONS
Error
Code
77
76
75
Error Code Meaning
Zero Signal Too Low
The zero signal too low message is displayed
during calibration when the sensor zero
signal is below the pre-configured levels and
a zero calibration can not be achieved.
For catalytic sensors this would typically
signify there is a large imbalance between
the two detecting elements of the sensor.
The sensor installation should be checked
for loose wires or the sensor replaced.
For mA sensors this would typically signify
that the mA output from the sensor requires
calibrating.
Zero Signal Too High
The zero signal too high message is
displayed during calibration when the
sensor zero signal is above the pre-
configured levels and a zero calibration can
not be achieved.
This is typical of the sensor detecting its
target gas and zero gas should be applied
to the sensor. Alternatively, for catalytic
sensors, this would typically signify there
is a large imbalance between the two
detecting elements of the sensor. The
sensor installation should be checked for
loose wires or the sensor replaced.
For mA sensors this would typically signify
that the mA output from the sensor requires
calibrating.
Calibration Signal Too Low
The calibration signal too low message
is displayed during calibration when the
sensor span signal is below the pre-
configured levels and a span calibration can
not be achieved.
5-14
5704 Control System
Software Card Fault latch
Version Status Signal
All Active No
All Active No
All Active No
No
No
No