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Theory Of Operation
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
250
06807A(DCNxxxx)
9.5.8. STATUS LEDS & WATCH DOG CIRCUITRY
Zero/Span and IZS Options
Sample/CAL Valve
IZS Option
Permeation Tube Heater
Dark Shutter
Sample Chamber Heater
I2C Watchdog LED
Zero/Span and IZS Options
Zero/Span Valve
Figure 9-21:
Relay Board Status LED Locations
Thirteen LEDs are located on the analyzer’s relay board to indicate the status of the
analyzer’s heating zones and valves as well as a general operating watchdog indicator.
Table 9-1 shows the state of these LEDs and their respective functionality.
Table 9-1:
Relay Board Status LED’s
LED
COLOR
FUNCTION
STATUS WHEN LIT
STATUS WHEN UNLIT
D1
RED
Watchdog circuit
Cycles On/Off every 3 seconds under control of the CPU.
D2
YELLOW
Sample chamber
(RCELL) heater
HEATING
NOT HEATING
D3, D4
YELLOW
Unused
N/A
N/A
D5
YELLOW
IZS heater (option)
HEATING
NOT HEATING
D6
YELLOW
Unused
N/A
N/A
D7
GREEN
Zero / Span Valve
Valve open to Span Gas path
Valve open to Zero Gas
(normal state)
D8
GREEN
Sample / Cal Valve
Valve open to
calibration gas path
Valve open to sample gas
inlet on rear panel
(normal state)
D9, D10
GREEN
Unused
N/A
N/A
D11
GREEN
UV Lamp Shutter
Shutter open
Shutter closed
D12-14
GREEN
Unused
N/A
N/A
Содержание T100
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Страница 362: ...APPENDIX B T100 Spare Parts List T100 Instruction Manual B 2 068070000 Rev A ...
Страница 370: ...APPENDIX D ELECTRONIC SCHEMATICS T100 Instruction Manual D 2 068070000 Rev A ...
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