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TPI Digital Manometers FAQ
Can I measure negative pressure on my manometer?
Yes, all models will read from approximately -16" of water to +48" of water.
How can I measure in pounds per square inch?
The 615 and 625 have selectable units and can display it in PSI. The 610 and 620 only measure in inches of water. You can divide the reading by 27.68 to convert to PSI.
How do you compensate for the differences in atmospheric pressures at different altitudes?
All four models have a push button zero that will zero your base reading at any altitude.
What does the “trim” mode do?
The “trim” mode displays a running average to stabilize the readings when constant changes in pressure won’t allow the display to be read.
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