M1 Series - DM Instruction Manual 9R000034-IR 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. Pressure can be displayed in selectable engineering units of PSI, bar, mbar, kPa, mmHg, inHg, mmH2O or inH2O. www.meriam.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Table of Contents Introduction ...............................................................3 User Interface..........................................................4 Single Keypad Functions ...........................................4 ON/OFF (O) Key....................................................4 BACKLIGHT (B) Key ...........................................4 FUNC (F) Key ........................................................
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.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 User Interface Single Keypad Functions ON/OFF (O) Key The ON/OFF key, represented by the standard ON/OFF symbol, turns the M1 ON or OFF (note: the ON/OFF key must be held until the display turns on or off). Upon power on, the M1 will perform a self test, display all segments for approximately 1-2 seconds, then go into the normal pressure measure mode using the last pressure units selected.
M1 Series - DM 1. Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Zeroing the M1 To Zero the M1, first turn off pressure sources and vent pressure ports to atmosphere. Then simultaneously press and hold the F and U keys until “F.CAL” is displayed. The display will read “---” during the zeroing process. The process is complete when the display changes from “----” to a “zero” reading. Note: The M1 can only be zeroed if the measured zero is within ±2.5% (of FS) of the factory calibrated zero limit.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Liquid Crystal Display (LCD) The LCD displays the: • Pressure or Temperature measurement via large digits, • Pressure measurement via bar graph, and • Pressure or Temperature engineering units via icons. A low battery warning (the BAT icon) is displayed when the batteries require replacement. Approximately 2 hours of run time is available immediately following a low battery warning.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Engineering Units Select For pressure measurements: mmHg inHg mmH2O inH2O kPa mbar bar PSI user 1 user 2 (@ 0°C) (@ 0°C) (@ 20°C) (@ 20°C) (optional) (optional) To change the pressure units, press the UNIT key while in NORMAL mode. “user 1” and “user 2” are reserved for custom user defined “units of measure”. Contact Meriam if this support is required.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Record Mode The M1 can store up to 240 pressure measurements (also called values or points) in a single record (REC) session. For maximum flexibility, a REC session can be: • Automatic - the current value is automatically stored every 5 seconds, for up to 20 minutes • Manual - the current value is stored every time the U key is pressed, up to 240 times Both types of REC sessions can store between 1 and 240 measurements.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 REC View: First, set the M1 to NORMAL mode (no functional mode icons on). Then enter REC View mode by pressing both the B and U keys until the REC icon illuminates. Second, press the U key to cycle through the stored values.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Field Recalibration The M1 can be recalibrated in the field for zero and span. The proper primary standards must be available prior to calibrating the unit. 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.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 SPAN First, before the M1 can be spanned, it must be zeroed. Second, to Span the M1, a calibration specific pressure must be applied. If this Span pressure is known (because the unit has been spanned previously), skip the next step. To determine the Span pressure, make sure the pressure sources are still vented (i.e. still at zero), then press and hold the O and B keys until “F.CAL” is displayed. Immediately following “F.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Specifications Type and Range: All sensors are non-isolated D – 28 inH2O (1 psi) D – 138 inH2O (5 psi) D – 416 inH2O (15 psi) D – 832 inH2O (30 psi) D – 2000 inH2O (72.3 psi) A – 755 mmHg (15 psia) A – 1551 mmHg (30 psia) A – 2585 mmHg (50 psia) G – 5 psi G – 15 psi G – 30 psi G – 50 psi G – 100 psi Accuracy: ±0.25% of FS Includes the combined effects of temperature, linearity, repeatability, hysteresis and resolution.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Battery Type: 3 x AA battery, field replaceable. Alkaline (A900614-00011): Duracell, PC1500, 1.5V, 2000mAh Duracell, MN1500, 1.5V, 2000mAh Varta, 4906, 1.5V, 2600mAh Battery Operation: > 300 hours continuous use without backlight on, 1 year shelf life, auto power off set at 30 minutes, low battery warning giving approximately 2 hours of run time. Enclosure: (6.5” × 3.2” × 1.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Certification/Safety/Warnings The following defines the certification and area classification of the M1 Series pressure instrument. Note the following WARNINGS and requirements: • User must use bulkhead fitting hex surface when attaching user’s 1/8” NPT fitting. When making mechanical connections DO NOT apply torque to bulkhead fitting that causes the fitting to turn or twist with respect to plastic enclosure.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 Remove the two screws located at the top center and bottom center of the battery cover by turning them counterclockwise until the fully disengaged from the M1 base. Lift the cover from the back of the unit. Do not remove the pink antistatic foam that is attached to the inside of the battery cover.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 User Connections Connection: 1/8” female NPT, 316SS. The pressure connections (P1 and P2) are marked on top of the keypad as shown on page 1. “D” or Differential models have 2 used pressure ports. P1 is the high pressure connection and P2 is the low pressure connection (as shown below). “G” Gauge and “A” Absolute models have one used pressure port, P1. P2 is used to vent enclosure/sensor to atmosphere.
M1 Series - DM Instruction Manual 9R000034-IR E.O. 6409 JAN 2008 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. Meriam Process Technologies 10920 Madison Ave.
