Sash Position Sensor (Sps) - Price Antec controls CAVA Manual

Sash Position Sensor (SPS)

The Sash Position Sensor (SPS) reports the open area of the fume hood by
measuring the sash location. Cava™ uses the SPS measurement to adjust the
exhaust airflow based upon the measured sash opening. The SPS contains a long-
life potentiometer (over 250,000 cycles) and is constructed using a stainless-steel
cable for stability and a thick plastic cover for protection against airborne chemical
agents.
See the SPS product submittal on
Dimensions, and Wiring.
CAUTION
The Sash Position Sensor cable must be mounted as close to parallel as
possible with the direction of the sash movement.
Mechanical Installation
The SPS can be mounted in one of four ways. Options A mounts to the counterweight system, Option B mounts directly above
the sash outside of the fume hood, Option C also mounts to the counterweight system, and Option D mounts directly in the
hood.
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Option A
Mount the SPS on the top of the fume hood.
STEP 1
Ensure the cable clamp does not pass around a pulley.
STEP 2
Run the sensor cable back to the CAVA mounted on the front of the fume hood and connect it
to a Universal Input (see
STEP 3
Ensure the sensor cable travels parallel to the counterweight cable.
Option B
Mount the SPS above the sash.
STEP 1
Ensure the cable is free from obstruction along the entire length of sash movement.
STEP 2
Ensure that the mounting position of the end of the cable will not pass above the SPS even at
the maximum sash height.
STEP 3
Run the sensor cable back to the CAVA mounted on the front of the fume hood and connect it
to a Universal Input (see
Electrical Installation section).
Electrical Installation section).
CAVA - MANUAL