RM-111 Operations Manual
Application 4
Application 4
accumulated by the D.U.T
**When testing a standard by counting output pulses, the RM-111 will count the output pulses of both
the reference standard (REF) and the standard under test (DUT), until the selected number of pulses
are achieved. The “
Input A
:” parameter input allows the user to select either “
REF
” or “
DUT
”. If
“
REF
” is selected, the test will stop after the RM-111 counts the specifi ed number of pulses from
the reference standard. If “
DUT
” is selected, the test will stop after the RM-111 counts the specifi ed
number of pulses from the standard under test. To reduce errors associated with testing standards
with different pulse output constants, the “
Input A:
” parameter should be set to “
DUT
” whenever
the DUT has a lower pulse resolution than the reference standard. If “
DUT
” is selected, the DUT
must be connected to PORT A. Follow the prompts on the RM-111 for connection details.
4. Press ENTER to exit the Test Setup screen.
5. From the Main Menu select RUN TESTS.
6. Select Test Standard.
7. Select the previously confi gured test setup.
8. If not already completed, follow the prompts on the RM-111 to make the appropriate
connections. See Figure 8.0 “Testing an Electromechanical Standard (Potential Gating)” for the
applicable wiring diagram. The number of reference standards defi ned in the test setup determine
how the ports are confi gured. In this application, there is one RM or RD Primary Reference
Watthour Standard that is connected to Port A. The RM-1R Mechanical Relay will connect to
Port D.
9. Once connections are complete press ENTER to start the test.
10. The RM-111 will prompt the user to reset the standard displays. Reset the standard’s display
and press ENTER.
11. In this mode, the RM-111 counts the number of pulses from the reference standard(s). The
watthour count will be displayed when the specifi ed number of pulses have been counted.
12. The test is now complete. To process the results press ENTER.
13. Showing the results will display the result screen with a down arrow icon in the lower
right corner. This icon references the DOWN ARROW key on the RM-111 keypad. Pressing
the DOWN ARROW key prompts the user to enter the DUTs display reading. Enter that value
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