SOR Pivot Seal Weatherproof Pressure Switch - Manual (Page 3)

Form 496 (01.13) ©SOR Inc. 3/8
Process Connection
Securely connect process line to pressure port using two wrenches: one to hold flats on
pressure port, the other to tighten process pipe or tube fitting.
Use care not to loosen pressure port from body or body from housing.
Failure to mount the housing on a fl at mounting surface may result in
torsional forces on the housing that could cause false trips or render the
pressure switch inoperative.
Safety Integrity Level (SIL) Installation Requirements
The SOR pressure switches have been evaluated as Type-A safety related hardware.
To meet the necessary installation requirements for the SIL system, the following
information must be utilized:
„ Proof Test Interval shall be one year.
„ Units may only be installed for use in Low Demand Mode.
„ Products have a HFT (Hardware Fault Tolerance) of 0, and were evaluated in a
1oo1 (one out of one) configuration. Form 1538 (03.12) ©2012 SOR Inc.
Calibration
Fixed Dead Band Models
Use 3/4” open-end wrench to turn hex adjusting nut clockwise to increase set point;
counterclockwise to decrease Set Point. Approximate set point can be obtained by sighting
across top of adjusting nut to calibration scale on interior wall of housing. If precise set
point calibration is required, it will be necessary to use a regulated pressure source, a
suitable continuity tester, and a 1/4% test gauge.
Adjustable Dead Band Models

Decreasing Pressure Set Point - use the fixed dead band procedure (above) to calibrate.

Increasing Pressure Set Point - can then be adjusted by turning the white thumbwheel
on the electrical switching element.
- Smaller dead band turn wheel clockwise (left to right).
- Bigger dead band turn wheel counter clockwise (right to left). Bigger dead band may
degrade repeatability.
See SOR Catalog (Form 216) for reference dimension drawings.
For certified dimension drawings, contact the factory.
Switching Element has been precisely positioned in the housing and
overtravel adjusted at the factory for optimum performance. Any
inadvertent movement or replacement in the fi eld will degrade
performance and could render the device inoperative, unless factory
authorized procedures are followed.