SOR High Static Operation - Manual (Page 5)

Form 391 (01.13) ©SOR Inc. 5/12
Calibration
Do not remove other covers or attempt to adjust other parts of the
mechanism. All have been precisely positioned at the factory and
should not be moved in the fi eld.
Coarse Device calibrated without reference to system (static) pressure
Calibration (Lo side vented). Test apparatus:
 Pressure gauge
 Variable pressure source
 Test light or ohmmeter

Remove weathertight knurled cap.

Insert a 5/32 Allen hex wrench into Set Point adjustment.

Connect a test light or ohmmeter to C – Common and NO – Normally Open.
W1 - Terminal block is accessible under noted cover. AD - This model supplied with
color coded and marked wire leads.

Increase pressure to the desired Set Point on Increasing pressure.

Turn the hex wrench clockwise (in) to increase Set Point and counterclockwise
(out) to decrease Set Point. Note the actuation, deactuation by test light or ohmmeter.

For Set Point on Decreasing pressure, decrease pressure to the desired Set Point
and repeat Step 5.

Remove the hex wrench and replace weathertight cap.
Precise The device is calibrated with reference to system (static) pressure.
Calibration Performance is enhanced when calibration is accomplished under
simulated system pressure profile or as it is intended to be used in
actual service. Test apparatus:
 Differential pressure gauge
 Variable pressure source
 Block/bleed and equalizer valves
 Test light or ohmmeter

Remove the weathertight knurled cap.

Insert 5/32 Allen hex wrench into Set Point adjustment.

Connect test light or ohmmeter to C–Common and NO – Normally Open.
W1 - Terminal block is accessible under noted cover. AD - This model supplied with
color coded and marked wire leads.

Increase pressure equally on Hi and Lo sides to desired system (static) operating
pressure (equalizer valve open).

To adjust Set Point on Increasing Differential Pressure: Close equalizer valve and
bleed Lo side until desired pressure appears on indicator and Set Point is verified by
test light or ohmmeter. Turn hex wrench clockwise to increase Set Point and counter-
clockwise to decrease Set Point. Note actuation, deactuation by test light or ohmmeter.

To adjust Set Point on Decreasing Differential Pressure: Differential Pressure must
be at or above Increasing Set Point, then slightly open equalizer valve until desired
decreasing pressure appears on indicator and Set Point is verified by test light or
ohmmeter. Perform Step 5 above as necessary.

Remove Allen wrench and replace weathertight cap.