How to Adjust a Differential Pressure Gauge Switch
- Remove the switch cover
- Set your multimeter to 2000 ohms
- Attach the black test probe to the blue wire (common) and the red test probe to the red wire (normally open)
- Your multimeter should read 1. The switch is presently set at 30psid.
- Apply pressure to the high pressure port only using air and venting the low pressure port to the atmosphere (on piston models use hydraulic fluid).
- In this example, we will pressurize the instrument to 20psid, which will become our new switch set point.
- Use the allen wrench to loosen the switch set screw to begin the adjustment. Continue to adjust until your multimeter reads close to zero.
- Re-tighten the switch set screw. Do not over tighten or you may damage the screw.
- Reduce the applied pressure until your multimeter reads 1. The switch is now in the normally closed position.
- Repeat adjustment until the new switch setting is achieved.
This video specifically shows instructions on how to adjust an enclosed switch for a 0-30 PSID gauge with a single pole, double throw switch. While the description applies to a number of Orange Research differential pressure gauge models, including our 1516, 1203, 1303, 1533 and 1833 series, we offer a variety of additional DP gauge options. Please contact us for more information or to discuss your specific differential pressure measurement requirements.