Siemens 7MF4033 series, User Manual

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Post-Installation Test UMSITRPDS3-1
November 2010
5-4
5.4.3 Loop Test
This test verifies that a transmitter is operating properly and is capable of transmitting 0% and 100%
analog output signals to a HART Master. The test applies only to transmitters operating in analog mode.
A transmitter configured for digital mode can be tested by setting its address to zero (0).
1. Establish communication; the Online menu displays. First, press 3 Device Setup, then 2
Diagnostics/Service, 2 Simulation/Test, 1 Simulation, and finally 1 Loop Test.
2. A warning appears: “WARN–Loop should be removed from
automatic control.” If the loop status cannot be changed for
operational reasons, press ABORT (F3) to end this
procedure and return to the Online menu. If it is okay to
proceed, go to step 3.
3. Remove the loop from automatic control, then press OK
(F4). When OK is pressed, a list of analog output options is
displayed (at right).
4. Press “1” on the keypad or ENTER (F4) to select the 4 mA
option. The Communicator displays the message “Fld dev
output is fixed at 4.000 mA.” Press OK (F4) to confirm and
proceed with testing or press ABORT (F3) and proceed to
step 8.
5. Read the DMM. The value should be 4 mA.
6. Repeat steps 4 and 5 using the 20 mA output level. The
DMM reading should be 20 mA.
7. For outputs other than 4 or 20 mA, choose option 3, Other,
and enter any desired output value. The DMM reading
should be the entered value in mA.
8. To end the loop override session, press “4” on the keypad or
the ABORT (F3) softkey. The message “Returning fld dev to
original output” appears.
9. When the message “NOTE–Loop may be returned to
automatic control” appears, return the loop to automatic
control, then press OK (F4). This completes verification of
analog output.
IMPORTANT
Failure to exit loop override correctly can cause
the transmitter to remain parked at a fixed
current.
SITRANS P
Choose analog output
level
1 4mA
2 20mA
3 Other
4 End
ABORT|ENTER
Note: If using a Model 375 Field
Communicator, see the inside of
the front cover of this manual.