SOR Dual Hi-Lo Weatherproof Pressure Switch - Manual (Page 4)

4/4 Form 248 (04.13) ©SOR Inc.
14685 West 105th Street, Lenexa, KS 66215  913-888-2630  800-676-6794 USA  Fax 913-888-0767
Registered Quality System to ISO 9001
Printed in USA www.sorinc.com
Calibration

Remove the housing cover.

To increase the set point at which the No. 1 (left side) switching element(s) actuates,
turn the hex adjusting nut clockwise with a 3/4-inch open-end wrench.

Sight across the flat top of the adjusting nut to the calibration scale at the bottom of
the housing for an approximate set point. Use a 1/4% external pressure gauge to more
precisely calibrate the pressure switch.

Repeat steps

and

for the No. 2 (right side) set point. There is no interaction, so it
is not critical whether the left or right side is set first.

Replace the housing cover. The pressure switch can be placed in service.
Overtravel has been preset at the factory, i.e. the switching element assembly has
been precisely positioned in the housing for optimum performance. It normally
should not be changed in the fi eld. Should adjustment be necessary, factory
approved procedures must be closely followed. Any inadvertent movement or
replacement in the fi eld will degrade performance, void the warranty and could
render the device inoperative.
“V2 EXPLOSION PROOF 18” 18 AWG color-coded and marked wire leads
with 3/4” NPT (F) conduit connection.
Common Normally Open Normally Closed
SPDT
No. 1 (Left side) C1 Blue NO1 Black NC1 Red
No. 2 (Right side) C2 Blue NO2 Black NC2 Red
2-SPDT (DPDT)
Nos. 1 & 2 (Left side) C1 Blue NO1 Black NC1 Red
C2 Yellow NO2 Brown NC2 Orange
Nos. 3 & 4 (Right side) C3 Blue NO3 Black NC3 Red
C4 Yellow NO4 Brown NC4 Orange
GR - Ground (Earth) Green wire connected to each hermetically sealed switching
element capsule.
NOTE: Transpose NO and NC on vacuum switches when set points are in the vacuum range.