CEL-712 Microdust Pro Real-time Dust Monitor
12 Casella Measurement
2.5 mm output port
The 2.5 mm output port is a 2.5 mm stereo jack. It has two functions:
The tip connection (1) provides an
analogue DC output signal. The
output level is 2.5 VDC to
represent the full-scale of the range
currently selected.
The ring connection (2) provides a
switched open-drain Alarm output
signal which may be used to control external alarms or monitoring
devices. The output line is pulled low whenever the Alarm threshold
level and trigger time is exceeded. It is cleared when the prevailing dust
level fall below the defined ‘Alarm Off’ conditions.
The maximum voltage and current should be <15 volts at <500 mADC.
The output impedance for the DC output is approximately 500Ω.
If you use the DC output, you should make certain the load impedance is
as high as possible.
The signal ground for the outputs is on the barrel connection (3).
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