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M2 Series
M202 PRECISION ABSOLUTE MANOMETER
Meriam Process Technologies' M202 Precision Absolute
Manometer is a microprocessor based pressure sensing device
used to directly measure pressure relative to absolute zero.
Models are available to measure pressure ranges up to 900mm
Hg Abs and 2000mm Hg Abs. Pressure can be displayed in a
variety of engineering units. All units include a Tare function,
a Min/Max function, selectable damp rates and altitude
displayed in feet or meters. The M202 can also display
barometric pressure corrected to sea level.
ATEX rating:
0539
Ex ia IIC T4
(Tamb. -5ºC to +50ºC)
DEMKO 06 ATEX 0615699
IP40
page 1 of 36
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
M2 – SERIES USER MANUAL
II 1 G
Instruction Manual 9R68-A
Mar, 2008
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Table of Contents
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Summarization of Contents
Manometer User Interface and Keypad Operations
ON/OFF & BACK Key Functionality
Controls power and serves as backspace navigation.
MIN/MAX & UP Key Functions
Activates Min/Max display and scrolls through options.
TARE & DOWN Key Functions
Activates Tare function and scrolls through options.
PRGM & ENTER Key Operation
Enters Program Mode and selects/confirms settings.
Backlight Key Control
Toggles the display backlight between green and off.
Manometer Zeroing Procedures
Zeroing: Referenced to Absolute Zero
Traditional method using a vacuum snapshot for zeroing.
Zeroing: Factory Zero
Restores the original factory calibration curve.
Zeroing: User-Adjusted Zero
Allows user to enter a known reference value for zeroing.
Manometer Program Mode Settings
Program Mode: Units Select
Standard engineering units selection for display.
Program Mode: Pressure Corrected to Sea Level
Enables correction of pressure readings to sea level.
Program Mode: Damp Rate Select
Adjusts display damping rate for measurement stability.
Program Mode: Data Logging
Records pressure measurements automatically or manually.
Program Mode: Leak Test
Determines the leak rate in pneumatic systems.
Manometer Re-Calibration Procedures
Re-Calibration: 1-Point EDIT and START
Performs single-point re-calibration for zero, span, and linearity.
Re-Calibration: 5-Point EDIT
Edits calibration points for a 5-point recalibration procedure.
Re-Calibration: 5-Point START
Executes the 5-point re-calibration procedure.
Re-Calibration: Restore Factory Defaults
Resets calibration data to factory default settings.
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