OMEGA HHP360 -A, -B Precision Absolute Manometer User's Guide

The HHP360 Series Precision Absolute Manometer is a microprocessor based pressure sensing device used to directly measure pressure relative to absolute zero. The HHP360-A measures pressure from 0 – 17.403 PSIA and the HHP360-B measures pressure from 0 – 38.674 PSIA. Pressure can be displayed in a variety of English and S.I. engineering units. All HHP360s include a Tare function, a Min/Max function, selectable damp rates and altitude displayed in feet or meters. The HHP360 can also display barometric pressure corrected to sea level.

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OMEGA HHP360 HHP360-A HHP360-B User's Guide | Manualzz

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Key features

  • Measure pressure relative to absolute zero
  • Displays pressure in various units
  • Tare function
  • Min/Max measurement
  • Selectable damping rates
  • Altitude display in feet or meters
  • Barometric pressure corrected to sea level

Frequently asked questions

The HHP360-A has an accuracy of ±0.02% F.S. (F.S. = 900 mm Hg).

The HHP360-B has an accuracy of ±0.015% F.S.* from 0-1000 mm Hg and ±0.025% F.S.* from 1000-2000 mm Hg (F.S. = 2000 mm Hg Absolute).

You can zero the HHP360 using three methods: Referenced to Absolute Zero, Factory Zero, and User-Adjusted Zero. Referenced to Absolute Zero is the preferred method and involves applying a vacuum of less than 100 microns Absolute pressure to the sensor. Factory Zero restores the calibration curve to the original zero taken at the factory. User-Adjusted Zero allows you to enter a pressure value when a known reference is applied.

The damp rate is an adjustable exponential type damping feature that helps steady the display when measuring pulsating pressures. You can select a damp rate from 0.1 to 25 seconds.

The Data Logging feature allows you to record pressure measurements in automatic or manual mode. In automatic mode, a pressure value is captured every 5 seconds for 20 minutes, resulting in 240 stored values. In manual mode, a pressure value is captured each time the PRGM key is pressed up to 240 values.

The Leak Test feature allows you to determine the leak rate in the pneumatic system being monitored. You can configure the test period (up to 1440 minutes) and the manometer will display the leak rate in the pressure units per minute at the conclusion of the test.

Yes, the HHP360 can be re-calibrated in the field for zero, span, and linearity. You can choose between 1-point or 5-point re-calibration. You can also restore the re-calibration data to the factory defaults.

User questions

S Z

Patricia S.

How do I enable the Auto Shut-Off feature and what are the available time settings?
The Auto Shut-Off feature can be enabled to automatically turn off the device after a period of inactivity. Options are DISABLED, 10, 20, 30, 45, and 60 minutes. The factory default is 10 minutes.
S Z

Patricia S.

Does the Auto Shut-Off timer interrupt Data Logging or Leak Test?
No, the timer is suspended during Data Logging and Leak Test to prevent data loss.
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