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Theory Of Operation
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
248
06807A(DCNxxxx)
C
OO
L
E
R
(Cl
o
se
d
L
o
o
p
)
To
Motherboar
d
PMT Preamp PCA
E Test Control
From CPU
D-A
Converter
PMT
Coarse
Gain Set
(Rotary
Switch)
PMT Fine
Gain Set
(Rotary
Switch)
PMT
Signal
Offset
E-Test
Generator
O-Test
Generator
O Test Control
From CPU
PMT Temp
Sensor
PMT
Temperature
Feedback
Circuit
TEC Control
PCA
PMT Output
PMT HVPS
Drive Voltage
PMT Temp Analog Signal
to Motherboard
PMT Output Signal
(
PMT
)
to Motherboard
O Test
LED
Amp to
Voltage
Converter/
Amplifier
Low Pass
Noise
Filter
MUX
Figure 9-20:
PMT Preamp Block Diagram
The PMT temperature control loop maintains the PMT temperature around 7° C and can
be viewed as test function
PMT TEMP
on the front panel (refer to Section 4.2.1).
The electrical test (
ETEST
) circuit generates a constant, electronic signal intended to
simulate the output of the PMT (after conversion from current to voltage). By bypassing
the detector’s actual signal, it is possible to test most of the signal handling and
Summary of Contents for T100
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Page 20: ...Teledyne ML T100 UV Fluorescence SO2 Analyzer xx ...
Page 21: ...21 PART I GENERAL INFORMATION ...
Page 77: ...77 PART II OPERATING INSTRUCTIONS ...
Page 78: ...Getting Started Teledyne ML T100 UV Fluorescence SO2 Analyzer 78 ...
Page 207: ...207 PART III TECHNICAL INFORMATION ...
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Page 362: ...APPENDIX B T100 Spare Parts List T100 Instruction Manual B 2 068070000 Rev A ...
Page 370: ...APPENDIX D ELECTRONIC SCHEMATICS T100 Instruction Manual D 2 068070000 Rev A ...