1. Pressure
The pressure based on vacuum as the zero point reference.
2. Positive pressure (force)
A pressure greater than atmospheric pressure based on atmospheric pressure.
3. Negative pressure (force) (vacuum)
Based on atmospheric pressure, the pressure is lower than atmospheric pressure.
4. Differential pressure (force)
The difference between two pressures.
5. Gauge pressure (force)
A pressure greater or less than atmospheric pressure based on atmospheric pressure.
6. Pressure gauge
An instrument used to measure positive pressure based on atmospheric pressure.
7. Vacuum gauge
An instrument used to measure negative pressure based on atmospheric pressure.
8. Pressure and vacuum gauge
An instrument used to measure positive and negative pressure based on atmospheric pressure.
9. General pressure gauge
Pressure gauges, vacuum gauges, and pressure vacuum gauges with an accuracy level equal to or lower than 1.0.
10. Lightly tap displacement
The change in the measured quantity displayed on the instrument after lightly tapping the instrument housing, with the input remaining unchanged.
11. Overpressure
Apply a load greater than its measurement upper limit to the instrument.
12. Alternating pressure
Apply a load to the instrument that alternates back and forth with a certain amplitude, frequency, and pattern.
13. Return difference
Within the measurement range, when the input pressure rises or falls, the difference in the displayed value between two corresponding output values of the instrument at the same measurement point after tapping lightly.
14. Temperature impact
The error caused by changes in temperature parameters when other environmental parameters are kept at reference values.
15. Measurement range
The range of the measured object measured with the prescribed accuracy.
16. Scale range
The range defined by the starting and ending values of the scale.