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THEORY OF OPERATION
Model 400E Ozone Analyzer
Instruction Manual
232
P/N 04316 Rev: B
Status LED’s
Eight LED’s are located on the Analyzer’s Relay board to show the current status on
the various control functions performed by the Relay Board. They are:
Table 10-1: 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 direct control of the
analyzer’s CPU.
D2
1
YELLOW
Metal Wool
Scrubber Heater
HEATING
NOT HEATING
D3
YELLOW
Spare
N/A
N/A
D4
YELLOW
Spare
N/A
N/A
D5
YELLOW
Spare
N/A
N/A
D6
YELLOW
Spare
N/A
N/A
D7
GREEN
Zero/Span Gas
Valve
Valve Open to SPAN GAS
FLOW
Valve Open to ZERO GAS
FLOW
D8
GREEN
Measure/Ref
Valve
Valve Open to REFERENCE
gas path
Valve Open to MEASURE gas
path
D9
GREEN
Sample/Cal Gas
Valve
Valve Open to CAL GAS
FLOW
Valve Open to SAMPLE GAS
FLOW
D10
GREEN
Spare
N/A
N/A
D11
GREEN
Spare
N/A
N/A
D12
GREEN
Spare
N/A
N/A
D13
GREEN
Spare
N/A
N/A
D14
GREEN
Spare
N/A
N/A
D15
GREEN
Photometer UV
Lamp Heater
HEATING
NOT HEATING
D16
GREEN
IZS O
3
Generator
UV Lamp Heater
HEATING
NOT HEATING
Watch Dog Circuitry
Special circuitry on the Relay Board watches the status of LED D1. Should this LED
ever stay
ON
or
OFF
for 30 seconds, the Watchdog Circuit will automatically shut of
all valves as well as turn off the UV Source(s) and all heaters. The Sample Pump
will still be running.
Содержание 400E
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Страница 46: ...Frequently Asked Questions Model 400E Ozone Analyzer Instruction Manual 46 P N 04316 Rev B INTENTIONALLY BLANK ...
Страница 184: ...CALIBRATION PROCEDURES Model 400E Ozone Analyzer Instruction Manual 184 P N 04316 Rev B INTENTIONALLY BLANK ...
Страница 204: ...EPA Protocol Calibration Model 400E Ozone Analyzer Instruction Manual 204 P N 04316 Rev B INTENTIONALLY BLANK ...
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