TELEDYNE API T100U, Дополнение к руководству по эксплуатации

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Teledyne API - T100U Manual, Addendum to T100 Manual P/N 06807 Troubleshooting and Service
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8.1.3 FAULT DIAGNOSIS WITH SYNC DEMOD PCA LEDS
There are four green Light Emitting Diodes (LEDs) on the bottom left side of the Sync
Demodulator PCA. They indicate various statuses and can be used to troubleshoot
problems associated with the board.
Table 8-2: Relay PCA Status LED Failure Indications
Indicator Function Description Action
DS4 Watchdog Toggles on or off
every second
Steady on or off controller on PCA has crashed, PMT
temp. control still operates but PMT, REF and PMT Temp
voltages as shown in test functions will be XXXX. Press
reset button on sync demod to restart; if problem
continues check power supply voltages on PCA or PCA is
failing and must be replaced.
DS3 I2C Activity Flashes each time
sync demod is polled
by instrument CPU
once every 1 to 1.5
seconds
Steady on or off indicates I
2
C bus failure check wiring
harness taking I
2
C to motherboard, another I
2
C device is
hanging bus, I
2
C transceiver on motherboard has failed, or
CPU has problem.
DS2 A/D Status 1 Short frequent
flashes tracks timing
of A/D converter
Lack of flash indicates internal failure of A/D or firmware.
Press reset button on sync demod to restart; if problem
continues check power supply voltages on PCA or PCA is
failing and must be replaced.
DS1 A/D Status 2
8.2 OTHER PERFORMANCE PROBLEMS
Please refer to Section 12.5 of the T100 manual for information.
8.3 ADDITIONAL REPAIR PROCEDURES
The following repair procedures are in addition to those listed in Section 12.7 of the
T100 Manual,
8.3.1 UV LAMP ADJUSTMENT AND/OR REPLACEMENT
There are two ways in which ambient conditions can affect the UV Lamp output and
therefore the accuracy of the SO
2
concentration measurement: lamp aging and lamp
positioning.
LAMP AGING
Over a period of months, the UV energy will show a downward trend, usually 30% -
50% in the first 90 days, and then a slower rate, until the end of useful life of the lamp.
Periodically running the UV lamp calibration routine (see Section 5.9.6 of the T100
Manual) will compensate for this until the lamp output becomes too low to function at
all, 2-3 years nominally.
06840B DCN 6201