SOR Low Range - Manual

Form 492 (11.13) ©SOR Inc. 1/4
These instructions provide information for installation, electrical connection, process
connection and calibration of 107 Differential Pressure Switches.
107
Differential Pressure Switch
General Instructions
Registered Quality System to ISO 9001
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 a wetted adjustable range spring
oppose high side pressure. Calibration is accomplished by
adjusting the range spring with the set point adjustment screw.
Design and specifications are subject to change without notice.
For latest revision, go to sorinc.com
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.
stallation, electrical connection, process
Pressure Switches.
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Use care during installation not to inadvertently move the electrical switching
element or its housing. Movement of either could disturb the relative positions of
internal working parts and alter calibration or render the device inoperative.
Application
The 107 Differential Pressure Switch is suited for draft range service as well as industrial air and
gas services which are compatible with the wetted parts and within nameplate specifications.
Contact the SOR representative in your area or the factory in Lenexa, Kansas for details.
Installation
The 107 is position sensitive. Mount the 107 so that the diaphragm is vertical (as shown
above). Non-vertical mounting positions will cause calibration scale error.
If condensation is expected within process piping, pressure ports should be located at 6
o’clock to prevent moisture accumulation within the instrument. If condensation is not
expected, the pressure ports can be positioned to any location as long as the diaphragm
remains vertical.
Securely mount the base plate bracket to flat surface using suitable bolts.