Download 6200E - Teledyne Analytical Instruments

Model 6200E Instruction Manual
Theory Of Operation
10.4.9. Status LEDs & Watch Dog Circuitry
IZS O ption
P erm eation T ube H eater
D ark S hutter
S O 2 /H 2 S valve
2
I C
W atchdog LE D
Zero/Span and IZS O ptions
Zero/S pan V alve
Zero/S pan and IZS O ptions
S am ple/C al V alve
Sam ple C ham ber
H eater
H 2 S Æ S O 2 converter heater
Figure 10-17: 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 10-2 shows the
states of these LEDs and their respective functionality.
Table 10-2:
LED
D1
COLOR
RED
D2
YELLOW
D3
YELLOW
D4
YELLOW
D5
YELLOW
D6
YELLOW
D7
GREEN
D8
GREEN
D9
GREEN
SO2/H2S valve
D10
D11
D12-14
GREEN
GREEN
GREEN
Unused
UV Lamp Shutter
Unused
M6200E Rev: A1
Relay Board Status LED’s
FUNCTION
Watchdog circuit
Sample chamber
heater
H2S Æ SO2 converter
heater
Unused
IZS heater Perm.
Tube (option)
STATUS WHEN LIT
STATUS WHEN UNLIT
Cycles On/Off every 3 seconds under control of the CPU.
Unused
Sample/Cal Valve
(option)
Zero/Span Valve
(option)
HEATING
NOT HEATING
HEATING
NOT HEATING
N/A
N/A
HEATING
NOT HEATING
N/A
Valve open to zero/span
valve.
N/A
Valve open to sample inlet
Valve open to zero gas inlet
Valve open to span gas inlet
Gas stream bypasses H2S Æ
SO2 converter. Analyzer
measuring SO2
N/A
Shutter open
N/A
Valve open to H2S Æ SO2
converter. Analyzer
measuring H2S.
N/A
Shutter closed
N/A
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