RM-111 Operations Manual
Application 5
Application 5
**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 9.0 “Testing an Electronic 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 electronic standard
using it’s reset button on the instrument face 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 D.U.T.’s display reading. Enter that value
directly into the keypad and press ENTER. The calculated % registration or % error will appear
at the bottom of the screen. For multiple D.U.T.’s enter their respective display reading directly
47
