PureAire Air Check Lite, Instruction Manual

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PureAire Monitoring Systems, Inc.
5/25/07
3
1 . 2.2 Transmitter Interior
1.
Calibration Port — This port is used for when calibrating Air Check

Lite Monitoring Systems which do not have a digital display. See
Sensor Calibration elsewhere in this manual.
2.
Terminal Block
— This terminal block is where the VDC
power/analog output connection is made.
3.
Sensor Cell Terminal Block
— This terminal block is where the
sensor cell cable output connection is made.
1 . 2.3 Electrochemical Sensor
1.
Span Potentiometer — This potentiometer is used to adjust the
sensitivity of the sensor cell. It should only be adjusted when
calibrating the instrument.
2.
Zero Potentiometer — This potentiometer is used to adjust the
instrument’s
4 mA analog output signal to ensure that it is transmitting a 4 mA
signal when the instrument is reading a zero concentration.
3.
Shorting Plug
— The sensor is shipped with a jumper (shorting plug)
in place. This plug should be removed prior to sensor installation and
replaced whenever the sensor is removed for extended periods of time
(storage, etc.).
1. Span Potentiometer
2. Zero Potentiometer
3. Shorting Plug
1. Calibration Port
2. Terminal Block
3. Sensor cell
Terminal Block