TELEDYNE API T100U, Дополнение к руководству по эксплуатации

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Troubleshooting and Service Teledyne API - T100U Manual, Addendum to T100 Manual P/N 06807
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8.1.2 FAULT DIAGNOSIS WITH TEST FUNCTIONS
The following table supersedes Table 12.2 of the T100 Manual.
Table 8-1: Test Functions - Possible Causes for Out-Of-Range Values
TEST
FUNCTION
NOMINAL
VALUE(S)
POSSIBLE CAUSE(S)
STABIL
(STANDARD)
≤
0.075 ppb with zero
air
Faults that cause high stability values are: pneumatic leak; low or very unstable UV lamp
output; light leak; faulty HVPS; defective preamp board; aging PMT; PMT recently exposed to
room light; dirty/contaminated reaction cell.
STABIL2
(EPA DEF)
≤
0.075 ppb with zero
air
Same as STABIL
SAMPLE FL
650 cm
3
/min
± 10%
Faults can be caused by: clogged critical flow orifice; pneumatic leak; faulty flow sensor;
sample line flow restriction.
PMT
-20 TO 150 mV with
zero air
High or noisy readings could be due to: calibration error; pneumatic leak; light leak (improper
assembly); aging UV filter; low UV reference output; PMT recently exposed to room light; light
leak in reaction cell; reaction cell contaminated; HVPS problem.
It takes 24-48 hours for a PMT exposed to ambient light levels to return to normal functioning.
NORM PMT - -
Noisy Norm PMT value (assuming unchanging SO
2
concentration of sample gas):
Calibration error; HVPS problem; PMT problem; UV reference problem; UV lamp problem.
UV LAMP 2000 - 4400 mV
This is the instantaneous reading of the UV lamp intensity. Low UV lamp intensity could be
due to: aging UV lamp; UV lamp position out of alignment; faulty lamp transformer; aging or
faulty UV detector; dirty optical components.
Intensity lower than 600 mV will cause UV LAMP WARNING.
UV STAB
0 to 100 mV Unstable lamp or failed UV lamp driver.
LAMP RATIO ___
The current output of the UV reference detector divided by the reading stored in the CPU’s
memory from the last time a UV Lamp calibration was performed. Out of range lamp ratio
could be due to: malfunctioning UV lamp; UV lamp position out of alignment; faulty lamp
transformer; aging or faulty UV detector; dirty optical components; pin holes or scratches in the
UV optical filters; light leaks.
STR LGT <100 ppb
High stray light could be caused by: aging UV filter; contaminated reaction cell; light leak;
pneumatic leak.
DRK PMT 200 - 325 mV
High dark PMT reading could be due to: light leak; high pmt temperature; high electronic
offset.
DRK LMP
-50 - 200 mV High dark UV detector could be caused by: light leak; high electronic offset.
HVPS
≈ 400 V to 900 V
Incorrect HVPS reading could be caused by; HVPS broken; preamp board circuit problems.
RCELL TEMP
50ºC ± 1ºC
Incorrect temperature reading could be caused by: malfunctioning heater; relay board
communication (I
2
C bus); relay burnt out
BOX TEMP
ambient
+ ~ 5ºC
Incorrect temperature reading could be caused by: Environment out of temperature
operating range; broken thermistor; runaway heater
PMT TEMP 7ºC ± 2ºC constant
Incorrect temperature reading could be caused by: TEC cooling circuit broken; High chassis
temperature; 12V power supply
IZS TEMP
(OPTION)
50ºC ± 1ºC Malfunctioning heater; relay board communication (I
1
C bus); relay burnt out
PRESS
ambient
± 2 IN-HG-A
Incorrect SAMPLE pressure could be due to: pneumatic leak; malfunctioning valve;
malfunctioning pump; clogged flow orifices; sample inlet overpressure; faulty pressure
sensor
SLOPE 1.0 ± 0.3
Slope out of range could be due to: poor calibration quality ; span gas concentration incorrect;
leaks; UV Lamp output decay.
OFFSET < 250 mV
High offset could be due to: incorrect span gas concentration/contaminated zero air/leak; low-
level calibration off; light leak; aging UV filter; contaminated reaction cell; pneumatic leak.
TIME OF DAY Current time
Incorrect Time could be caused by: Internal clock drifting; move across time zones; daylight
savings time?
06840B DCN 6201