Fault Diagnosis With Dashboard Functions - Teledyne T400 User Manual

ALERT
SAMPLE PRES WARN
SAMPLE TEMP WARN
PHOTO REF WARNING
O3 GEN TEMP
WARNING
SYSTEM RESET
A failure of the analyzer's CPU or Motherboard can result in any or all of the preceding messages.
5.7.2 F D
AULT
Besides being useful as predictive diagnostic tools, the functions viewable from the front
panel can be used to isolate and identify many operational problems when combined with
a thorough understanding of the analyzer's Theory of Operation (see Section 6).
The acceptable ranges for these test functions are listed in the "Nominal Range" column
of the analyzer Final Test and Validation Data Sheet that was shipped with the
instrument. Values outside these acceptable ranges indicate a failure of one or more of
the analyzer's subsystems. Functions whose values are still within the acceptable range
but have significantly changed from the measurement recorded on the factory data sheet
may also indicate a failure.
116
FAULT CONDITION
Sample Pressure is <15
If Sample Pressure is < 15 in-HG:
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 – If Sample Pressure is > 35 in-HG:
pump disconnected).
Sample temperature is <
10°C or > 50°C.
Occurs when Ref is
<2500 mVDC or
>4950 mVDC.
IZS Ozone Generator
Temp is outside of control
range of 48°C
± 3°C.
The computer has
rebooted.
D
IAGNOSIS WITH ASHBOARD
Teledyne API – Model T400 O
POSSIBLE CAUSES
• Blocked Particulate Filter
• Blocked Sample Inlet/Gas Line
• Failed Pressure Sensor/circuitry
• Bad Pressure Sensor/circuitry
• Ambient Temperature outside of specified range
• Failed Sample Temperature Sensor
• Relay controlling the Bench Heater
• Failed Relay Board
• I 2 C Bus
• UV Lamp
•
UV Photo-Detector Preamp
• No IZS option installed, instrument improperly configured
• O generator heater
3
• O generator temperature sensor
3
• Relay controlling the O generator heater
3
• Entire Relay Board
• I C Bus
2
• This message occurs at power on.
• If it is confirmed that power has not been interrupted:
• Failed +5 VDC power
• Fatal Error caused software to restart
• Loose connector/wiring
F
UNCTIONS
Analyzer
3
083730400A DCN8130