Meriam’s M201 has new features to make drop testing Rotary (Natural) Gas Meters even easier! New hardware options protect the M201 from one sided overpressure. Options include a ¼ turn valve manifold and an integral push-to-read cartridge valve in addition to the traditional push-to-read valve manifold. More importantly, new operating features provide users with a live pressure display and more automation to make field use easier than ever before.
The new Measure Mode lets the M201 be used as a conventional differential pressure measurement device. Users will appreciate the live pressure display as they check the handheld’s zero or observe DP across rotary gas meters. And when a drop test is made, the M201 uses an internal stop watch to measure the test length. The user only has to start and stop the test; the M201 reports both the test time and the average differential pressure measured during the test. Toggle the Min/Max key to see the minimum and maximum DP measured during the test.
With hundreds of original M201s at work in the field, Meriam recognizes that some customers will want to continue using the legacy software to stay consistent within their company. The new M201 includes a Mode Selection menu option for Legacy or Enhanced modes – the users chooses which mode is best for them!
Rotary Gas Meter Tester M201 Advantages
Accuracy
DN0028: ±0.1% FS 0-28”
DN0200: ±0.05% FS 0-200”
No temperature effect from 23º to 122ºF (-5º to +50ºC).
Engineering Units
Inches of H2O (select 4ºC, 20ºC, or 60ºF), PSI, mm of Hg, inches of Hg, mBars, Bars, kPa, kg/
cm2, cm of H2O and user selectable scaling.
Media Compatibility
DN: Non-isolated differential sensor for clean, dry, non-corrosive gases.
Field Re-cal
The M201 can be recalibrated in the field for zero, span, and linearity. The user has the option to select a 1 point or 5 point calibration procedure. Enables users with accurate primary standards to calibrate their devices locally if desired.
Pressure Limits
Twice range on Differential (DN) units when pressurized on high side only and 150 PSI (10.5 Kg/cm2) static when applied to both sides of the sensor simultaneously.
Min/Max Capture
Capture speed is 10X per second.
Operation
Enchanced - A push-to-read or 1/4 valve assembly keeps HI and LO sides equalized during connection across meter. Turn M201 "ON" to get message "Press Hold to Acquire Data." Press "Hold" key to start test. User determines test time, ending test by pressing the "Hold" key again. Display will show the test time and averaged differential pressure across the meter during the test. Press the "Hold" key again to start a new test.
Legacy - A push-to-read valve keeps HI and LO sides equalized during connection across meter. Turn M201 "ON" to get message "Press Hold to Acquire Data." Press "Hold" key to start test. User determines test time, ending test by pressing the "Hold" key again. Display will show the averaged differential pressure across the meter from test start to test stop. Press the "Hold" key again to start a new test.
Auto Shut-Off User selectable shut-off. Programmable at 10, 20, 30, 45, 60 minutes and disable.
Ordering Information
Model Number & Description
M201 (specify pressure range) Rotary Gas Meter Tester (only available with DN0028 or DN0200 sensor range)
Specify valve type: PTR (Push-to-Read Assembly)
IPTR (Integral Push-to-Read Valve)
QTV (1/4 Turn Valve Assembly)
All Models Include
• Protective Red Boot
• 4 AA Alkaline batteries
• Hard copy user’s manual
Order Options
- Z9A000069 Hard Carrying Case
- Z9P000108 Hard Carrying Case with Vacuum Pump
- Z9P000109 Hard Carrying Case with Pressure Pump
- ZA34386 Connector Kit
- ZA900016-90727 Pete’s Plug Adapter Kit Y 1/8” Needle
-
ZA900016-90733 Pete’s Plug Adapter Kit Y 1/16” Needle
-
ZA36853 Push-to-Read Manifold
-
Z9A000001 Integral Push-to-Read Valve
-
Z9A156 1/4 Turn Valve Manifold
The digital display eliminates parallax errors, and depending on the range of the gauge, it can have a resolution of 0.01 or 0.001” H2O. A min/max feature also allows the user to see the minimum and maximum pressures recorded during the test. The unit is portable, and with the integral push to read manifold, the M201 Rotary Gas Meter Tester can safely be used with lines having a static pressure of up to 150 PSIG.
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