InsiteIG MPA-48, Manual

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Appendix B – Jet Clean System
The InsiteIG cleaning system uses a pressurized stream of air or water to remove bio growth or other
debris from the optical surfaces of our sensors. The InsiteIG analyzers control the frequency and duration
of the clean cycle through clean relays (see drawing IIG07R112, IIG07R113, IIG07R114 and IIG07R116).
These relays are programmable through the setup menu, see Relays section of this manual for more
detail.
The InsiteIG Model CA Compressors consists of a compressor pump which delivers a sufficient blast
of air to clean debris from the optics in most wastewater treatment plant basins and a directional solenoid
valves to blast the sensors on two or four channels independently. A CA-2 compressor is need for each
pair of sensors and the CA-4 compressor is need for each set of four sensors. It is housed in a UL, NEMA
4X enclosure (see drawing IIG01N030 for CA-2 and IIGN031 for CA-4) with quick disconnect ¼” tubing
fittings provided on the bottom of the enclosure. The power requirements are 110/120 VAC @ 50/60 Hz
and 1.8A. The unit is fused at 3 amps with a 1¼ x ¼” time delay fuse. The ambient operating conditions
are a temperature of 0 degree Celsius to 55 degree Celsius and 0 to 100% humidity. 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)
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 IIG07R112, IIG07R114,
IIG07R116.
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
two or more sensor heads. A ¼” quick disconnect fitting is supplied with the sensor. See drawing
IIG07R113 for wire details. There are no changes required in the sensor head for use with water or shop
air. Additional solenoids valves can be added in series for additional channels. One solenoid valve per
channel may be used so that the cleaning blast is not divided.
All of the InsiteIG sensors have the jet clean design built-into the sensor housing. The sensors are
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.