Ceraphant PTP31B, PTP33B Commissioning
Endress+Hauser 31
Example 1 • Measured value = 2.2 mbar (0.033 psi)
• You use the "GTZ" parameter to correct the measured value with the value, e.g.
2.2 mbar (0.033 psi). This means that you are assigning the value 0 mbar (0 psi) to the
pressure present.
• Measured value (after pos. zero adjust) = 0 mbar (0 psi)
• The current value is also corrected.
• If necessary, 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)
• You use the "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.
• Measured value (after pos. zero adjust) = 0 mbar (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).
Factory setting 0.0
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