Teledyne 6200E - Sulfides Analyzer - Manual (Page 227)

Model 6200E Instruction Manual Theory Of Operation
M6200E Rev: A1 227
10.4.9. Status LEDs & Watch Dog Circuitry
Z ero/S pan and IZ S O ptions
S am ple/C al V alve
IZ S O ption
P erm eation T ub e H eater
D ark S hutter
S a m ple C ham b er
H eater
I 2 C
W atchdog LE D
Zero/S pan and IZS O ptions
Ze ro/S pa n V alve
H
2
S Æ SO
2
co nverter hea te r
S O
2
/H
2
S valve
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 : 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
heater
HEATING NOT HEATING
D3 YELLOW
H
2
S Æ SO
2
converter
heater
HEATING NOT HEATING
D4 YELLOW Unused N/A N/A
D5 YELLOW
IZS heater Perm.
Tube (option)
HEATING NOT HEATING
D6 YELLOW Unused N/A N/A
D7 GREEN
Sample/Cal Valve
(option)
Valve open to zero/span
valve.
Valve open to sample inlet
D8 GREEN
Zero/Span Valve
(option)
Valve open to zero gas inlet Valve open to span gas inlet
D9 GREEN SO
2
/H
2
S valve
Gas stream bypasses H
2
S Æ
SO
2
converter. Analyzer
measuring SO
2
Valve open to H
2
S Æ SO
2
converter. Analyzer
measuring H
2
S.
D10 GREEN Unused N/A N/A
D11 GREEN UV Lamp Shutter Shutter open Shutter closed
D12-14 GREEN Unused N/A N/A