Meriam M201 Rotary Gas Meter Tester - Manual (Page 7)

Keystroke Display
1.. Turn unit on using t
On/Off key. Top line shows “ ‘Hold’ to
Test”, Bottom line displays
live Differential Pressure
(DP) value.
2.. Press and Hold key
start the test. Top line shows “Acquiring
Data…”, Bottom line
displays live DP value
3.. Allow M201 to acqui
test data per user
company’s procedures. Top line shows “Acquiring
Data…”, Bottom line
displays live DP value
4.. Press and Hold key aga
to stop the test. Top line shows the length of
the test in seconds or
minutes, Bottom line reads
“R” for result and shows the
average DP over the test
period
5.. Press n/Max key for
additional test information if
desired. Top line shows Minimum
and Maximum DP value
over test period, Bottom line
reads “R” for result and
shows the average DP over
the test period
6.. To start a new test, pre
the Hold key. Repeat Steps
3 & 4. New test is run
7.. Press th ◄ arrow key. Returns to Measure Mode
Addendum No. 9R124-IR
June, 2010
www.meriam.com page 7 of 10
Enhanced Mode – Running a Drop Test
The M201 Enhanced mode provides more user feedback at the
display then Legacy mode does. Live pressure readings are
displayed prior to and during a drop test. Upon test completion,
the display shows the test period that was used along with the
average differential pressure over the test period.
To run an Enhanced Mode drop test on a rotary
natural gas meter, follow the steps below.