Status Leds & Watch Dog Circuitry - Teledyne T100 Instruction Manual

Theory Of Operation
9.5.8. STATUS LEDS & WATCH DOG CIRCUITRY
LED COLOR
D1 RED
D2 YELLOW
D3, D4 YELLOW
D5 YELLOW
D6 YELLOW
D7 GREEN
D8 GREEN
D9, D10 GREEN
D11 GREEN
D12-14 GREEN
250
Figure 9-21:
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
FUNCTION
Watchdog circuit
Sample chamber
(RCELL) heater
Unused
IZS heater (option)
Unused
Zero / Span Valve
Sample / Cal Valve
Unused
UV Lamp Shutter
Unused
06807A(DCNxxxx)
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
IZS Option
Permeation Tube Heater
Dark Shutter
Zero/Span and IZS Options
Zero/Span Valve
Zero/Span and IZS Options
Sample/CAL Valve
Sample Chamber Heater
I2C Watchdog LED
Relay Board Status LED Locations
STATUS WHEN LIT
Cycles On/Off every 3 seconds under control of the CPU.
HEATING
N/A
HEATING
N/A
Valve open to Span Gas path
Valve open to
calibration gas path
N/A
Shutter open
N/A
STATUS WHEN UNLIT
NOT HEATING
N/A
NOT HEATING
N/A
Valve open to Zero Gas
(normal state)
Valve open to sample gas
inlet on rear panel
(normal state)
N/A
Shutter closed
N/A