GE XDP-H2, Руководство пользователя

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