XNX Universal Transmitter Quick Start Guide
64
Warning Description
Ap-
plicable
Sensors
Latching /
Non-Latching
Frequency of
Diagnostic
Event History
Data
Action For Resolution
W006
Negative Drift
ECC,
mV
Non-latching 2 seconds
Raw gas
concentration
of sensor
Check sensor location for external interference. Perform zero calibration. If prob-
lem persists after zero calibration and no interference exists, replace sensor.
Negative Drift
Optima,
Excel
Non-latching
XNX polls
sensor every
2 seconds,
diagnostic
frequency
controlled by
sensor
Sensor fault or
warning code
Check sensor location for external interference. Perform zero calibration. If prob-
lem persists after zero calibration and no interference exists, replace sensor.
W007
Calibration
Required
All Non-latching 2 seconds
Number of
days remain-
ing until
calibration ex-
pires, negative
= number of
days expired
Time since the last span calibration has exceeded a defined limit. Performing a
successful span calibration will clear the condition. The limit is the user-defined
calibration interval. W007 can be disabled by setting the calibration interval to 0.
W009
Sensor 24 VDC
Supply Bad
Optima,
Excel
Non-latching
XNX polls
sensor every
2 seconds,
diagnostic
frequency
controlled by
sensor
Sensor fault or
warning code
(Note 4)
Check wire of 24V power supply to XNX as well as power supply operation. Also
check wiring between XNX and Optima/Excel.