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THEORY OF OPERATION
Model 400E Ozone Analyzer
Instruction Manual
236
P/N 04316 Rev: B
10.3.7.
Power Supply/ Circuit Breaker
The analyzer operates on 100 VAC, 115 VAC or 230 VAC power at either 50 Hz or
60Hz. Individual instruments are set up at the factory to accept any combination of
these five attributes. As illustrated in Figure 10-5, power enters the analyzer
through a standard IEC 320 power receptacle located on the rear panel of the
instrument. From there it is routed through the ON/OFF Switch located in the lower
right corner of the Front Panel.
AC Line power is stepped down and converted to DC power by two DC Power
Supplies. One su12 VDC, for various valves and valve options, while a
second supply pr5 VDC and
±
15 VDC for logic and analog circuitry as well
as the power supplies for the Photometer and IZS UV Lamps.
All AC and DC Voltages are distributed via the Relay Board.
Power Switch / Circuit Breaker
A 6.75 Amp circuit breaker is built into the ON/OFF Switch.
CAUTION
Should the AC power circuit breaker trip, investigate and
correct the condition causing this situation before turning the
analyzer back on.
AC POWER
ENTRANCE
ON/OFF
SWITCH
Pressure
Sensors
Mother
Board
CPU
PS 1 (+5 VDC; ±15 VDC)
PS 2 (+12 VDC)
Display
Keypad
Cooling
Fan
UV Source
IZS
Option
Pump
Temperature
Sensors
Gas Flow
Sensor
Heaters
Valve
Options
KEY
AC POWER
DC POWER
RELAY
BOARD
Measure / Reference
Valve
Reference
Detector
Option
Photometer
Preamp
Heater for
Optional
Metal Wool Scrubber
Figure 10-7: Power Distribution Block Diagram