Screen Error Messages - GE XDP-H2 User Manual

January 2008
Priority Error
Level Message
1 ADC In Out The analog-to-
of Range: digital converter
has returned an
invalid value.
2 mA Input The analog signal
Under from the
Range: transmitter is less
than 2.4 mA.
2 mA Input The analog signal
Over Range: from the transmit-
ter is more than
21.6 mA.
3 Gas Pcnt The target gas per-
Under centage is below
Range: the preset range.
3 Gas Pcnt The target gas per-
Over Range: centage is above
the preset range.
4 Low H2 pct: Occurs in H2/AIR
measurement
mode, when the
H2 reading is
below the Low
Alarm setpoint
(usually 85%).
4 Low Low Occurs in H2/AIR
H2 pct: measurement
mode, when the
H2 reading is
below the Low-
Low Alarm set-
point (usually
80%).
3-6
Table 3-1: Screen Error Messages
Cause
A low-level hardware failure is likely.
Contact the factory.
1. Could be caused by a loose or incorrect
electrical connection. Check all
electrical connections.
2. The sensor calibration may have
drifted too far. Contact the factory for
sensor recalibration or replacement.
3. May be caused by a failure in the ADC
circuitry. Contact the factory for
assistance.
4. No transmitter signal. Check the
transmitter wiring.
The sensor calibration has drifted. Contact
the factory for assistance with field recali-
bration.
The sensor calibration has drifted. Per-
form a field calibration (see "Calibrating
the System" on page 4-20).
The sensor calibration has drifted. Per-
form a field calibration (see "Calibrating
the System" on page 4-20).
This indicates air contamination, and the
Low Alarm will trip. Remove the source
of the air contamination.
This indicates air contamination, and the
Low-Low Alarm will trip. Remove the
source of the air contamination.
Suggested Remedy
XDP Analog
Output
Response
Holds last
value
Holds last
value
Holds last
value
Outputs zero
value
Outputs span
value
no response
no response
Operation