Lasair II Particle Counter Operations Manual Page L-1
Appendix L
HHIPA
For users who prefer the beep mode to be controlled at the probe, the Hand-Held
Isokinetic Probe (Audible) (HHIPA) is a sampling probe with an LED activity
indicator and audible alarm.
The Lasair HHIPA model is:
The HHIPA has a thumbwheel selector switch which determines how many
particles are required for each flash of the LED indicator and beep of the audible
buzzer.
To set the selector switch:
1 If your instrument is the Lasair II particle counter, plug the DB connector from
the HHIPA into the Lasair II particle counter’s HHIPA connector.
2 If you are using any other instrument, plug the DB connector from the HHIPA
into the AUX connector on the back panel of the counter.
3 Connect the sample tube from the HHIPA to the particle counter's inlet jet.
The HHIPA functions off the Lasair II particle counter’s first channel
accumulative counts.
HHIPA Model Flow Rate
HHIPA-A-1.0-
RJ11
1.0 CFM
Switch position Particles per
flash/beep
01
110
2100
31,000
4 10,000
5OFF
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