Description of device parameters Cerabar PMP21 IO-Link
50 Endress+Hauser
Example 1 • Measured value = 0.002 bar (0.029 psi)
• Use the Zero point adoption (GTZ) parameter to correct the measured value with the
value, e.g. 0.002 bar (0.029 psi). This means that you are assigning the value
0 bar (0 psi) to the pressure present.
• Display value (measured value) after position adjustment = 0 bar (0 psi)
• The current value is also corrected.
• Where applicable, check and correct switch points and span settings.
Example 2 Sensor measuring range: –0.4 to +0.4 bar (–6 to +6 psi) (SP1 = 0.4 bar (6 psi); STU =
0.4 bar (6 psi))
• Measured value = 0.08 bar (1.2 psi)
• Use the Zero point adoption (GTZ) parameter to correct the measured value with the
value, e.g. 0.08 bar (1.2 psi). This means that you are assigning the value 0 mbar (0 psi)
to the pressure present.
• Display value (measured value) after position adjustment = 0 bar (0 psi)
• The current value is also corrected.
• Warnings C431 or C432 appear because the value 0 bar (0 psi) was assigned to the real
value of 0.08 bar (1.2 psi) present and the sensor measuring range was thus exceeded
by ± 20%.
SP1 and STU values must be readjusted downwards by 0.08 bar (1.2 psi).
Damping (TAU)
Navigation Parameter → Application → Sensor → Damping (TAU)
Description The damping affects the speed at which the measured value reacts to changes in pressure.
Input range 0.0 to 999.9 seconds in increments of 0.1 seconds
Factory setting 2 seconds
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