083730510A DCN8172
Teledyne API T500U CAPS NO
2
Analyzer with NumaView™ Software
95
Table 5-3. Warning Alerts, Fault Conditions and Possible Causes
WARNING
FAULT CONDITION
POSSIBLE CAUSES
AUTO REF WARNING
AREF value outside allowable
limit.
Drift in baseline loss due to large leak.
Sample filter bypassed..Mirrors may be dirty –
contact Technical Support to confirm
BOX TEMP WARNING
Temperature of chassis is
outside specified limits.
(typically < 7
°
C or > 48
°
C)
Box Temperature typically runs ~7
°
C warmer
than ambient temperature
Poor/blocked ventilation to the analyzer
Stopped Exhaust-Fan
Ambient Temperature outside of specified
range
CANNOT DYN SPAN
1
Dynamic Span operation failed.
(Contact closure span calibration
failed while
DYN_SPAN
was set
to
ON
).
Measured concentration value is too high or
low
Concentration Slope value to high or too low
CANNOT DYN ZERO
2
Dynamic Zero operation failed.
(Contact closure zero calibration
failed while
DYN_ZERO
was set
to
ON
).
Measured concentration value is too high
Concentration Offset value to high
CONFIG INITIALIZED
Configuration and Calibration
data reset to original Factory
state or erased.
Failed Disk on Module
User erased data
DATA INITIALIZED
Data Storage in DAS was erased
before the last power up
occurred.
Failed Disk-on-Module
User cleared data.
REAR BOARD NOT
DET
Motherboard not detected on
power up. (CPU unable to
communicate with motherboard).
This warning only appears on Serial I/O COM
Port(s). Front panel display will be frozen,
blank or will not respond.
Failure of motherboard
RELAY BOARD WARN
The CPU unable to communicate
with the Relay PCA.
I
2
C Bus failure
Failed Relay Board
Loose connectors/wiring
SAMPLE PRESS WARN
Sample pressure is too high or
too low for accurate NO
x
, NO,
NO
2
readings. (Sample Pressure
is <15 in-Hg or > 35 in-Hg).
Normally 29.92 in-Hg at sea level
decreasing at 1 in-Hg per 1000 ft
of altitude (with no flow – pump
disconnected).
If Sample Pressure is < 15 in-Hg:
•
Blocked Particulate Filter
•
Blocked Sample Inlet/Gas Line
•
Failed Pressure Sensor/circuitry
If Sample Pressure is > 35 in-Hg:
•
Bad Pressure Sensor/circuitry
•
Pressure too high at Sample Inlet.
SYSTEM RESET
The computer has rebooted.
This message occurs at power on.
If it is confirmed that power has not been
interrupted:
5 VDC power
Fatal Error caused software to restart
Loose connector/wiring
1
Clears the next time successful zero calibration is performed.
2
Clears the next time successful span calibration is performed.
Summary of Contents for T500U
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