Meriam M201 Rotary Gas Meter Tester - Manual (Page 8)

Keystroke Display
1.. Turn unit on using t
On/Off key. Unit powers on
ready to start a drop test. Reads “Press Hold to
Acquire Data”.
2.. Press e Hold key to
start the test. Reads “Acquiring Data…”
No values are displayed
while pressure values are
stored.
3.. Press e Hold key
again to stop the test. Reads “R” for result and
“XX.XX Units”, the average
Differential Pressure (DP)
during the test period.
4.. 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
“XX.XX Units”, the average
DP over the test period.
5.. To start a retest, pre
the Hold key. Repeat Steps
3 & 4. Reads “Acquiring Data…”
6.. Press th ◄ arrow key. Returns to Measure Mode
www.meriam.com page 8 of 10
Addendum No. 9R124-IR
June, 2010
Legacy Mode – Running a Drop Test
The M201 Legacy mode operates the same as the original
M201 from Meriam did. Legacy mode provides the user with less
information than Enhanced mode does. No live pressure
readings are displayed either prior to or during the test. Upon
test completion, the display shows only the average differential
pressure over the test period.
To run a Legacy Mode drop test on a rotary natural gas
meter, follow the steps below.