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Teledyne API M452 Ozone Sensor Instruction Manual, 02852, Rev. E
4-3
4.3.2 Analog Output
The analog output is a 0-5 volt signal representing the ozone concentration
measured by the sensor. The output is scaled to the concentration range
that the sensor has been set to measure. Check the serial number label on
the M452 to determine the concentration range.
For best performance, the analog output should be connected to a
voltmeter or A/D converter with a differential input and a minimum input
impedance of 2K.
4.3.3 Zero Calibration Input
The zero calibration input is located on Digital Input #1. To zero the
M452, Digital Input #1 should be connected to the power common for at
least 1 second. This can be accomplished using a Normally Open switch or
relay.