Two-Point Measurement ≥ 50% Of The Maximum Measuring Range - Siemens SITRANS P DS III Operating Instructions Manual

Functional safety
8.5 Maintenance/check
8.5.2.4 Two-point measurement ≥ 50% of the maximum measuring range
General procedure
Requirement
The difference between the first input pressure and the second input pressure is ≥ 50% of
the maximum measuring range.
Checking monitoring of the maximum measuring range
1. Apply an initial input pressure.
2. Measure the transferred value.
3. Apply a second input pressure.
4. Measure the transferred value.
Image 8-6
Procedure for monitoring a minimum pressure
Checking monitoring of a minimum pressure
1. Check the monitoring of the maximum pressure with the threshold defined in the system.
2. Apply an input pressure value that is above the threshold.
3. Apply an input pressure value that is ≥ 1% of the maximum measuring range below the
threshold.
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Example of two-point measurement 50%
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08