2B Technologies 202 - Page 41

Model 202 Ozone Monitor Manual Rev. J-4
33
FIGURE 9-3: Printed Circuit Board.
Pressure
Sensor
Serial Output
12-V Power to
Board
Display
Lamp Power
Solenoid
Valve
Voltage Output
0-2.5 V
Temperature
Sensor
Detector
(Photodiode)
Microprocessor
5-V Regulator
Select Switch
Power Switch
External
Analog Inputs
Air Pump
Clock Battery
Heater
Flow Meter
Current Output
4-20 mA (optional)
4-20 mA socket
(optional)
SW1 (Reset)
SD Logger
SW2 (Program
Enable)