Meriam M201 Rotary Gas Meter Tester - Manual (Page 9)

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Addendum No. 9R124-IR
June, 2010
Instructions
1. Install preferred connectors in the 1/8” NPT (female)
connections on the
M201 or M201 manifold. Use Teflon tape or
other suitable thread sealer.
2. PTR and IPTR are normally open and the M201 sensor is
equalized.
The QTV valve must be manually moved to the
equalize position prior to
connecting pressure to the M201 .
3. Make connections to the gas meter’s HI and LO ports. Be
certain to
observe the P1 (HI) and P2 (LO) on the M201.
4. Turn M201 “On”. Display should read zero since HI and LO
sides are
connected and pressure is equalized. If not, re-zero
the M201 buy
simultaneously pressing the Min/Max and Hold
keys.
5. To make differential pressure measurements with PTR and
IPTR
options, manually depress and hold the push-to-read
valve. To make
differential pressure measurements with QTR
option, manually move the
¼ turn valve to the closed position.
PTR Manifold
Valve is open and
DPVa
sensor
equalized until the p
ush button valve is
IPTR
Cartridge Valve
Integral valve is open
and DP sensor equalized
until the push button
valve is depressed
QTV Manifold
¼ Turn Valve is
manually opened to
equalize DP sensor and
closed to make readings
To protect the M201’s differential pressure sensor from
damage due to accidental over pressure, it is importand to
use the M201’s equalizing manifold correctly. Three
options are available: a Push-To-Read (PTR) valve
manifold, an Integral Push-To-Read (IPTR) cartridge valve
and a Quarter Turn Valve (QTV) manifold
Using the Equalizing Manifold Options