Performing Proof Test
October 2018
Reference Manual
00809-0100-4026, Rev KC
Performing Proof Test
275
Appendix D Performing Proof Test
Performing proof test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 275
Field Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 275
RRM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 277
AMS Suite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 279
D.1 Performing proof test
This test detects approximately 95 percent of the possible Dangerously Undetected (DU) failures of the
transmitter including the sensor element. Here is a description of how to perform the test using a Field
Communicator, RRM, or AMS Suite. Note that the transmitter is not safety-rated during proof tests.
Alternative means should be used to ensure process safety during such activities.
Required tools: HART
®
host/communicator and a mA meter.
D.2 Field Communicator
Prior to this test, inspect the echo curve to ensure that no disturbing echoes affecting the measurement
performance are present.
HART Sequence: [2, 6, 1]
1. Bypass the safety PLC or take other appropriate actions to avoid false trip.
2. Disable write protection if the function is enabled.
HART Sequence: [3, 2, 1, 2, 1]. Type the password.
3. Using loop test, enter the mA value representing the high alarm current. Verify that the analog output
current is correct using the reference meter.
This step tests for compliance voltage problems, such as low power supply voltage or increased wiring
resistance.
HART Sequence: [2, 4, 1, 7]. Select 3 Other. Enter the analog output level representing the high
alarm current. Select Enter and then select OK.
Verify that the analog output current is correct. Select Abort to end loop test.
4. Using loop test, enter the mA value representing the low alarm current. Verify that the analog output
current is correct using the reference meter.
This step tests for possible quiescent current related failures.
HART Sequence: [2, 4, 1, 7]. Select 3 Other. Enter the analog output level representing the low alarm
current. Select Enter and then select OK.
Verify that the analog output current is correct. Select Abort to end loop test. Verify that the Current
output is restored to the original mode.
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