SOR Single Diaphragm Weatherproof Differential Pressure Switch with Terminal Block Connections User Manual
SOR Sensors
Form 506 (01.13) ©SOR Inc.
1/12
These instructions provide information for
installation, electrical connection, process
connection and calibration of Series 101/121
Differential Pressure Switches.
B-Series models (B3, B4, B5, B6) may be ATEX
Approved with the addition of a CL or ML option
at the end of the model string. Specific informa-
tion and instructions concerning these models
will be found throughout the following pages.
Series 101/121
General Instructions
Registered Quality System to ISO 9001
Design and
specifications are
subject to change
without notice.
For latest revision, go to
NOTE: If you suspect that a product is defective, contact the factory or the SOR
®
Representative
in your area for a return authorization number (RMA). This product should only be installed by
trained and competent personnel.
Table of Contents
Installation .......................................2
SIL Installation ..................................2
Process Connection ............................2
Electrical Connection ...........................3
Calibration .................................... 4-6
Operation.........................................7
ATEX Marking Information .....................9
Declaration of Conformity ................... 10
Use care during installation to avoid moving the electrical switching element
or its housing. Movement of either could change calibration or render the
device inoperative.
Mini-Hermet
Models
X
n
a-
Gen
Mini-Hermet
General Purpose and
Weathertight Models
will be found throughout t
G
W
B-Series
Models
B Series
Principle of Operation
Process pressure is sensed by a diaphragm and piston
assembly. The piston responds to differential pressure and
moves a shaft that actuates (deactuates) an electrical
switching element. Low side pressure and an adjustable
range spring oppose high side pressure. Adjustment of the
range spring determines the set point. (See Calibration.)