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Appendix B – CA-2 Jet Clean System
of the clean cycle through relays #3 and #4. (see drawing IIG04R112 & IIG04113) This relays are
programmable through the setup menu, see Relays section of this manual for more detail.
of air to clean debris from the optics in most wastewater treatment plant basins and a directional solenoid
valve to blast the sensors on channel 1 and channel 2 independently. It is housed in a UL, NEMA 4X,
polycarbonate enclosure (see drawing IIG01N030) with quick disconnect ¼” tubing fittings provided on the
bottom of the enclosure. A ¼” OD flexible tube with a 70 psi rating (customer supplied) connects the
sensors to the compressor assembly. Quick disconnect fitting are supplied on both the sensor heads and
compressor. The tubing length should be as short and possible. (If over 100’ please consult the factory) In
this case Relay #3 mode should be set to CA2 CLEAN.
The compressor system should be mounted as close to the sensor as possible. The tubing
connection, input power and relay connection to the analyzer are on the bottom of the enclosure. Handrail
brackets are available for the compressor enclosure. See drawing IIG01N030 and IIG04R112.
If plant water is being used, or shop air, the customer must supply clean water at 35 to 50 psig or air at
40 to 60 psig. A 2-way solenoid valve (customer supplied) may be used to turn on and off the water to both
sensor heads. A ¼” quick disconnect fitting is supplied with the sensor. See drawing IIG04R113 for wire
details. There are no changes required in the sensor head for use with water or shop air. In this case Relay
#3 mode should be set to ALARM.
Two solenoid valves may be used (one for each sensor) so that the cleaning blast is not divided. In
this case Relay #3 & Relay #4 are energized separately and Relay #3 mode should be set to SPECIAL.
constructed of impact resistant epoxies and polyurethanes, suitable for most waste treatment. The nozzle
aims the water, or air, stream across the optics of the sensor, removing any debris that may cause fouling.
The cleaning system uses a pressurized stream of air or water to remove bio growth or other
The Model CA-2 Compressor consists of a compressor pump which delivers a sufficient blast
All of sensors have the jet clean design built-into the sensor housing. The sensors are
debris from the optical surfaces of our sensors. The Aysix analyzers control the frequency and duration
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