Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 211
9.3.8. Power Supply/ Circuit Breaker
The analyzer operates on 100 VAC, 115 VAC or 230 VAC power at either 50Hz or 60Hz. Individual units
are set up at the factory to accept any combination of these five attributes. As illustrated in Figure 10-15,
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. A 6.75 Amp circuit breaker is built into the ON/OFF Switch.
AC power is distributed directly to the sample gas pump. The bench and GFC wheel heaters as well as
the GFC wheel receive AC power via the relay board.
AC Line power is converted stepped down and converted to DC power by two DC power supplies. One
supplies +12 VDC, for valves and the IR source, while a second supply provides +5 VDC and ±15 VDC
for logic and analog circuitry. All DC voltages are distributed via the relay board.
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
Cooling Fan
Mother
Board
CPU
PS 1 (+5 VDC; ±15 VDC)
PS 2 (+12 VDC)
Display
LVDS
transmittedr board
Pressure
Sensors
IR Source
Pump
GFC Wheel
Motor
Sync/Demod
M/R &
Segment
Sensors
Heaters
Valve Options
KEY
AC POWER
DC POWER
RELAY
BOARD
USB
Touchscreen
Figure 9-16: Power Distribution Block Diagram
