User’s Guide omega.com TM ® www.omega.com e-mail: info@omega.
omega.com TM ® OMEGAnet ® On-Line Service www.omega.com Internet e-mail info@omega.com Servicing North America: USA: ISO 9001 Certified Canada: One Omega Drive, P.O. Box 4047 Stamford CT 06907-0047 TEL: (203) 359-1660 e-mail: info@omega.com 976 Bergar Laval (Quebec) H7L 5A1 TEL: (514) 856-6928 e-mail: info@omega.
INSTALLATION AND MAINTENANCE OF THE DSW490B AND DSW490B SERIES OMEGA® SNAP ACTION SWITCHES FOR DIFFERENTIAL PRESSURE CONTROL INTRODUCTION The OMEGA differential pressure switch is a precision built U.L. approved control device which features a mechanical snap action switch. Controllers are available for operation on various pressure differentials with fixed or variable switching differentials. The standard electrical switch is SPDT and is available with various electrical characteristics.
For accurate setpoint calibration, mount the switch on a calibration stand, a pump or catalog Omega DWT 1305 deadweight gauge tester. A suitable reference standard such as a Test Gauge is necessary to observe convenient changes in pressure.
DIFFERENTIAL PRESSURE SWITCH – INCHES OF WATER DIFFERENTIAL PRESSURE SWITCH – PSID A B A D E C H 1/4 NPT Female D Ø 0.28 (3 Holes) Ø 0.28 (3 Holes) 3/4 NPT C F H 3/4 NPT G 1/4 NPT Low Pressure Inlet 1/4 NPT High Pressure Inlet 1/4 NPT Female E DSW490B DSW490B B G B E CAUT ION LE COUR ANT E R RMER AVANT AVA . UP F E D E NT O N RVICE E SE N CAUT I H D C AU T C AU T D’OU ION V M E T RI R TR . C E BI E LE COUR ANT E R RMER AVANT AVA .
MADE IN WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation.
Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors Infrared Pyrometers PRESSURE, STRAIN AND FORCE Transducers & Strain Gages Load Cells & Pressure Gages Displacement Transducers Instrumentation & Accessories FLOW/LEVEL Ro
