23 Using The Sensor Module
23.1 Gas Flow Routing Connection
The DigiPID has an “IN” and “OUT” port for sampling gas. Make
sure that the in and out sample tubes are properly oriented.
After making all gas connections and ensuring connection to the 8-pin
connector, turn on the power supply and warm up the sensor module.
Note: A two-hour warm-up time is recommended before making
measurements.
Firmly affix the sensor module to external equipment and make sure
the 8-pole interface connector makes a reliable, tight connection with
other equipment.
When you begin measurement, the sensor provides data to external
equipment, showing the current concentration of the specified gas.
Data is output digitally via the UART port or as an analog signal
(0.5V to 2.5V) from pin 3 of the interface connector. The sensor
module can be calibrated for different operations and gases.
If the DigiPID sensor is connected to RAE Systems equipment, you
can affix the sensor module directly to the equipment and then turn on
the instrument’s power supply. The sensor module runs normally. If
the other external equipment is not a RAE Systems product,
additional firmware and software support is necessary. RAE Systems
can provide essential information such as the handshaking protocol,
port setting, flow rating, etc.
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