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Troubleshooting & Repair
10.6.10. SHUTTER SYSTEM
SAMPLE
< TST TST > CAL
SAMPLE
8
EXIT returns
to the main
SAMPLE display
SETUP X.X
CFG DAS RNGE PASS CLK
SETUP X.X
COMM VARS
DIAG
PREV NEXT JUMP
DIAG I / O
PREV NEXT
10.6.11. PMT SENSOR
10.6.12. PMT PREAMPLIFIER BOARD
280
To check the functionality of the UV light Shutter by manually activating it:
RANGE = 500.000 PPB
SO2 =XXX.X
ENTER SETUP PASS : 818
1
8
ENTR
PRIMARY SETUP MENU
MORE
SECONDARY SETUP MENU
DIAG
SIGNAL I / O
ENTR
0) EXT_ZERO_CAL=OFF
JUMP
PRNT EXIT
Figure 10-5:
Manual Activation of the UV Light Shutter
The photo multiplier tube detects the light emitted by the UV excited fluorescence of SO
It has a gain of about 500000 to 1000000. It is not possible to test the detector outside of
the instrument in the field. The best way to determine if the PMT is working properly is
by using the optical test (OTEST), which is described in Section 4.8.5. The basic method
to diagnose a PMT fault is to eliminate the other components using ETEST, OTEST and
specific tests for other sub-assemblies.
To check the correct operation of the preamplifier board, we suggest the technician carry
out the electrical and optical tests described in 4.8.5 and 4.8.6.
If the ETEST fails, the preamplifier board may be faulty.
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
DIAG I / O
JUMP TO: 01
SETUP
2
9
Toggle these keys
until 29 is displayed
EXIT
DIAG I / O
29DARK_SHUTTER=OFF
PREV NEXT JUMP
EXIT
DIAG I / O
29DARK_SHUTTER=ON
PREV NEXT
JUMP
DIAG I / O
JUMP TO: 01
EXIT
33
Toggle these keys
until 33 is displayed
EXIT
DIAG I / O
33) UVLAMP_SIGNAL= 3.4 MV
PREV NEXT JUMP
06807A(DCNxxxx)
ENTR
EXIT
OFF
PRNT
EXIT
ON
PRNT
EXIT
ENTR
EXIT
PRNT
EXIT
UV LAMP_SIGNAL
should be
<20 mV
Activate the
Dark Shutter
EXIT 4x's to return
to the
SAMPLE display
.
2
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