Specifications

252
Reference Manual
00809-0100-4026, Rev HA
Appendix D: Performing proof test
November 2014
Performing Proof Test
Figure D-1. Range Values
5. Perform a two-point calibration check of the transmitter by applying level at two points
within the measuring range. Verify that the current output corresponds to the level
input values using a known reference measurement.
This step verifies that the analog output is correct in the operating range and that the
Primary Variable is properly configured.
Note that the applied level has to be between the Upper and Lower Range values,
otherwise the transmitter enters alarm mode. If the applied level is outside the
Maximum Measuring Range, the level reading accuracy may be reduced. For best
performance, use the
4-20 mA range points as calibration points. See Figure 1.
6. Enable write protection.
HART Sequence: [3, 2, 1, 2, 1].
7. Restore the loop to full operation.
8. Remove the bypass from the safety PLC or otherwise restore normal operation.
9. Document the test results for future reference.
20 mA Upper Range Value (URV)
Product Level
4 mA Lower Range Value (LRV)
Range 0-100 %
Upper Reference Point
Min Level Offset (C)
Hold Off Distance
Lower Reference Point
(Level=0)