SOR Adjustable Dead Band Weatherproof Pressure Switch - Manual (Page 2)

2/4 Form 466 (05.13) ©SOR Inc.
Process Connection
Securely connect the process line to the pressure port using two wrenches: one to hold the
hexagonal flats on the pressure port, the other to tighten the process pipe or tube fitting.
Ensure that the process connection is tightened and positioned so that
any binding and torsional forces imposed on the pressure switch are
minimal. Do not loosen the pressure port from the body because leakage
could result or the pressure switch could be rendered inoperative.
Electrical Connection
Ensure that wiring conforms to all applicable local and national electrical codes and install
unit(s) according to relevant national and local safety codes.
V1 – Weathertight SPDT: Screw terminal block with marked insulation.
Common Normally Open Normally Closed
C1 NO1 NC1
V3 – Explosion proof DPDT (2-SPDT): Hermetically sealed switching element
capsule has 18” - 18 AWG wire leads color coded and marked.
Common Normally Open Normally Closed
C1 - Blue NO1 - Black NC1 - Red
C2 - Yellow NO2 - Brown NC2 - Orange
GR - Ground (earth) green wire connected to each hermetically sealed switching element capsule.
Calibration

Remove the housing cover.

Connect a suitable variable pressure source with a calibrated reference gauge to the
pressure port. Connect an ohmmeter or test lamp across the switching element contact
terminals to monitor contact continuity. Use a 3/4” open-end wrench to turn the
adjusting nuts.

Slowly increase pressure to the pressure port. The continuity tester will indicate that
the contacts have changed state when increasing set point is reached. Note pressure
at increasing set point. If increasing set point is too low, turn the left adjusting nut
clockwise to raise the increasing set point. If increasing set point is too high, turn the
left adjusting nut counterclockwise to lower the increasing set point.
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.