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M1 Series - DM
M1 SERIES – DIGITAL MANOMETER
USER MANUAL
Meriam Process Technologies' M1 Series pressure instrument
is a microcontroller-based pressure sensing device that can be
used to directly measure pressure. Differential, Gauge and
Absolute pressure sensors are supported up to 100 PSI.
Pressure can be displayed in selectable engineering units of
PSI, bar, mbar, kPa, mmHg, inHg, mmH2O or inH2O.
www.meriam.com
Page 1 of 17
Instruction Manual 9R000034-IR
E.O. 6409 JAN 2008
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Summary of Contents for Meriam M100
- Page 1 E.O. 6409 JAN 2008 M1 SERIES – DIGITAL MANOMETER USER MANUAL Meriam Process Technologies’ M1 Series pressure instrument is a microcontroller-based pressure sensing device that can be used to directly measure pressure. Differential, Gauge and Absolute pressure sensors are supported up to 100 PSI.
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Page 2: Table Of Contents
Liquid Crystal Display (LCD) ........6 Engineering Units Select ........7 Record Mode ............8 Auto Shut-Off ............9 Field Recalibration ..........10 ZERO..............10 SPAN ..............11 Restore Factory Defaults ........11 Specifications ............12 Certification/Safety/Warnings .........14 Changing the Batteries..........14 User Connections.............16 Contact Information..........17 www.meriam.com Page 2 of 17... -
Page 3: Introduction
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Introduction Thank you for purchasing this Meriam product. Meriam has been providing innovative, reliable, cost-effective measurement and calibration solutions since 1911. The M1 has been designed using the latest technology to provide reliable accuracy throughout its entire operating temperature range, dependable operation, and exceptional battery life. -
Page 4: User Interface
UNIT (U) Key This key selects the engineering unit of measure desired when the M1 is in NORMAL or TEMP mode. www.meriam.com Page 4 of 17... -
Page 5: Zeroing The M1
• Selecting the TEMP mode (the °F or °C icon) will display the internal ambient temperature of the M1. o the UNIT key will toggle between °F and °C The minimum and maximum temperature the M1 has measured is permanently recorded for factory warranty issues. www.meriam.com Page 5 of 17... -
Page 6: Liquid Crystal Display (Lcd)
(if the backlight auto-off timer did not expire). The backlight should be turned off when not needed to conserve battery power. The backlight feature will be reduced when the M1 is in low battery mode. www.meriam.com Page 6 of 17... -
Page 7: Engineering Units Select
NORMAL mode. “user 1” and “user 2” are reserved for custom user defined “units of measure”. Contact Meriam if this support is required. Notes: Depending upon the pressure range of the M1, some engineering units may not be available (i.e. they will be skipped). -
Page 8: Record Mode
All previously stored REC session data will be saved and the M1 will return to NORMAL mode (the REC icon will go off). This step can be done anytime the REC icon is flashing. www.meriam.com Page 8 of 17... -
Page 9: Auto Shut-Off
The M1 will return to NORMAL mode (the REC icon will go off). This step can be done anytime the REC icon is on. Auto Shut-Off To conserve battery life, the M1 will automatically power off after 30 minutes of keypad inactivity. www.meriam.com Page 9 of 17... -
Page 10: Field Recalibration
These standards should meet the accuracy requirements for your company or industry. Meriam Process Technologies follows the guidelines established by ANSI/NCSL Z540 which requires that the primary standard be 4 times more accurate than the unit under test. -
Page 11: Span
The factory calibration defaults can be restored in the M1 by simultaneously pressing the O and F and U keys until the display shows “----”. The process is complete when the display changes from “----” to the current pressure reading. www.meriam.com Page 11 of 17... -
Page 12: Specifications
D – 1/8” female NPT, 316SS. P1 = high side, P2 = low side G – 1/8” female NPT, P1 port only, P2 vent A – 1/8” female NPT, P1 port only, P2 vent See User Connection Section of this Manual www.meriam.com Page 12 of 17... - Page 13 ° LO = The temperature of M1 below valid calibration range/field recalibration value. P HI = Pressure applied to M1 above valid calibration range/field recalibration value. P LO = Pressure applied to M1 below valid calibration range/field recalibration value. www.meriam.com Page 13 of 17...
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Page 14: Certification/Safety/Warnings
All three batteries should be replaced. To replace the battery locate the battery compartment in the bottom rear of the M1, as shown below. www.meriam.com Page 14 of 17... - Page 15 ” statement on the battery cover must be visible and ATMOSPHERE aligned in the approximate middle of the M1 case. To secure the cover, torque the screws clockwise to 1.6 in-lbs. Do not over tighten. www.meriam.com Page 15 of 17...
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Page 16: User Connections
WARNING User must use bulkhead fitting hex surface when attaching user’s 1/8” NPT fitting. No torque can be applied to bulkhead fitting with respect to plastic enclosure. www.meriam.com Page 16 of 17... -
Page 17: Contact Information
If the M1 cannot be zeroed, spanned, or is damaged, it must be returned to the factory for servicing. In this case, contact the Meriam Process Technologies representative in your area or call the factory at the numbers listed below for a Return Material Authorization (RMA) number.
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