Meriam M4 Series Instruction Manual
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Meriam M4 Series Instruction Manual

Handheld pressure and loop calibrator
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ZM4
Instruction Manual 9R87-B
June 2012
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Summary of Contents for Meriam M4 Series

  • Page 1 Instruction Manual 9R87-B June 2012 info@Meriam-Direct.com 1.888.610.7664...
  • Page 1 Instruction Manual 9R87-B June 2012...

  • Page 2: Table Of Contents

    Changing Batteries ..............27 Accessing SD Card ..............28 Downloading Data Using USB Interface ......... 29 Installing Wire Stand..............30 Range Specifications ..............31 Specifications ................33 Zeroing and Field Recalibration ..........36 Applications ................37 Contact Meriam ................. 40 info@Meriam-Direct.com 1.888.610.7664...

  • Page 2: Table Of Contents

    Changing Batteries ..............27 Accessing SD Card ..............28 Downloading Data Using USB Interface ......... 29 Installing Wire Stand..............30 Range Specifications ..............31 Specifications ................33 Zeroing and Field Recalibration ..........36 Applications ................37 Contact Meriam ................. 40...
  • Page 3 Figure 23: Accessing SD Card Figure 24: Installing Wire Stand Thank you for purchasing this product. Meriam has been providing innovative, reliable, cost effective measurement and calibration solutions for 100 years. The M400 Single Sensor or M402 Dual Sensor Handheld Pressure Transmitter Calibrator continues this legacy and is the first of its kind for the process measurement industry.
  • Page 3 Figure 23: Accessing SD Card Figure 24: Installing Wire Stand Thank you for purchasing this product. Meriam has been providing innovative, reliable, cost effective measurement and calibration solutions for 100 years. The M400 Single Sensor or M402 Dual Sensor Handheld Pressure Transmitter Calibrator continues this legacy and is the first of its kind for the process measurement industry.

  • Page 4: Certification And Safety

    In no event shall Meriam be liable for any indirect, special, incidental, consequential or punitive damages or for any lost profits arising out of or relating to any services provided by Meriam or its affiliates. It is not possible for Meriam to identify all foreseeable uses/misuses, therefore all persons involved in commissioning, using or maintaining this product must satisfy themselves that each intended application is acceptable.

  • Page 4: Certification And Safety

    In no event shall Meriam be liable for any indirect, special, incidental, consequential or punitive damages or for any lost profits arising out of or relating to any services provided by Meriam or its affiliates. It is not possible for Meriam to identify all foreseeable uses/misuses, therefore all persons involved in commissioning, using or maintaining this product must satisfy themselves that each intended application is acceptable.
  • Page 5 Indicates information essential for proper product installation, operation or maintenance. Information in this document is subject to change without notice. Check the Meriam web site (www.meriam.com) for the latest manual revision. info@Meriam-Direct.com 1.888.610.7664...
  • Page 5 Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. Indicates information essential for proper product installation, operation or maintenance. Information in this document is subject to change without notice. Check the Meriam web site (www.meriam.com) for the latest manual revision.

  • Page 6: Product Overview

    When the unit is attached to a high power USB port, everything except for the Volts/mA sensor runs from USB power. Volts/mA measurement or simulation should not be used with USB attached unless the USB power source is isolated. info@Meriam-Direct.com 1.888.610.7664...

  • Page 6: Product Overview

    Instruction Manual 9R87-B June 2012 Product Overview Figure 1: M4 Inputs and Outputs Number Name Description Pressure Manifold Connects the calibrator to a pressure Connection source via 1/8” NPT Female. M400 = One Pressure Sensor M402 = Two Pressure Sensors USB Connection Connects the calibrator to a computer using a USB Mini Type B to USB...

  • Page 7: Keys And Functions

    Turns the power On and Off. Turns green backlight On and Off. Function Keys F1 – F4 Change depending on Operation Mode Adaptive interface wheel scrolls up and down through menu options or increments or decrements a value. info@Meriam-Direct.com 1.888.610.7664...

  • Page 7: Keys And Functions

    Instruction Manual 9R87-B June 2012 Keys and Functions Figure 2: Keypad Functions Number Description Turns the power On and Off. Turns green backlight On and Off. Function Keys F1 – F4 Change depending on Operation Mode Adaptive interface wheel scrolls up and down through menu options or increments or decrements a value.

  • Page 8: Figure 3: Keypad Functions

    Units – Changes engineering units of a pressure sensor that is highlighted. Units for the Volts/mA module are set automatically according to the measure/simulate mode. Setup – Enters the setup menu for the unit or individual sensor that is selected or highlighted info@Meriam-Direct.com 1.888.610.7664...

  • Page 8: Figure 3: Keypad Functions

    Instruction Manual 9R87-B June 2012 Keys and Functions Figure 3: Keypad Functions Number Description Left Arrow – Navigates back out of menu or moves cursor Right Arrow – Navigates further into menu structure, moves cursor, or selects value Sensor – Highlights sensor of interest for configuring or viewing settings Units –...

  • Page 9: Measure Mode

    Unit is operating with a soft or hard over range limit. See over and under range table. Hold Function Key to toggle the hold function of the displayed values. Mn/Mx Function Key to reset the displayed maximum and minimum values. info@Meriam-Direct.com 1.888.610.7664...

  • Page 9: Measure Mode

    Instruction Manual 9R87-B June 2012 Measure Mode Figure 4: Measure Mode Display with All Indicators Shown Icon or Reference Function HOLD Values are held on display for reference. Data logging function is ON and calibrator is recording information. USB cable is connected to the calibrator. 100% Battery life as a percentage value.

  • Page 10: Main Unit Setup

    Data Logging Start, Stop, and setup parameters for a data log session. Date & Time Adjust date and time. Security Adjust security settings such as password, feature lockouts, etc Information Displays Product ID, Serial Number and Firmware Version. info@Meriam-Direct.com 1.888.610.7664...

  • Page 10: Main Unit Setup

    Instruction Manual 9R87-B June 2012 Main Unit Setup Figure 5: Main Unit Setup Display Reference Function Contrast Adjust Adjust contrast of display. Active setting shown on right. Power Mgmt Adjust Auto Off Timer, Backlight Timer, or Backlight Intensity to improve battery life. Data Logging Start, Stop, and setup parameters for a data log session.

  • Page 11: Power Management Setup

    Backlight brightness control. Active setting shown on right. NOTE: To maximize battery life, if the backlight is frequently used, reduce the backlight level. Also consider using the backlight timer to avoid the backlight being left on for long periods of time. info@Meriam-Direct.com 1.888.610.7664...

  • Page 11: Power Management Setup

    Instruction Manual 9R87-B June 2012 Power Management Setup Figure 6: Power Management Setup Display Reference Function Auto Off Timer Automatic power off timer selection. Active setting shown on right. Backlight Timer Automatic backlight shut off timer selection. Active setting shown on right. Backlight Level Backlight brightness control.

  • Page 12: Data Logging Setup

    Adjust the name of the data log. Press right arrow to bring up menu to enter name for data log session. Status Status of the data log session. Active status displayed on right. Press right arrow to bring up detailed information (shown in Fig. 8). info@Meriam-Direct.com 1.888.610.7664...

  • Page 12: Data Logging Setup

    Instruction Manual 9R87-B June 2012 Data Logging Setup Figure 7: Data Logging Setup Display Reference Function Start Start the data log using the current settings. Stop Stop or cancel the running data log. Interval Adjust the data log interval time between 1 and 60 seconds.

  • Page 13: Figure 8: Data Logging Status Display

    Figure 8: Data Logging Status Display The data log status display shows the configured Log Name, Interval and Duration at the top. At the bottom of the display, real-time data including Status, completion percentage and remaining time are shown. info@Meriam-Direct.com 1.888.610.7664...

  • Page 13: Figure 8: Data Logging Status Display

    Instruction Manual 9R87-B June 2012 Figure 8: Data Logging Status Display The data log status display shows the configured Log Name, Interval and Duration at the top. At the bottom of the display, real-time data including Status, completion percentage and remaining time are shown.

  • Page 14: Date & Time Setup

    To cancel without saving, press the Exit key. NOTE: The seconds field (ss) is not adjustable. The time can only be adjusted to the nearest minute. When the Save key is pressed the seconds are set to zero. info@Meriam-Direct.com 1.888.610.7664...

  • Page 14: Date & Time Setup

    Instruction Manual 9R87-B June 2012 Date & Time Setup Figure 9: Date & Time Setup Display Use the arrow keys to highlight the appropriate field. Set the correct value using the Adaptive Interface Wheel. To save the new date & time press the Save key. All the fields will temporarily display dashes while the new values are stored.

  • Page 15: Security Setup

    Figure 10: Security Setup Display Reference Function Field recalibration Set the lockout of the Field Recalibration function. Current lock setting shown on right. Change Password Modify the existing password. Press right arrow to bring up password change screen (shown in Fig. 11). info@Meriam-Direct.com 1.888.610.7664...

  • Page 15: Security Setup

    Instruction Manual 9R87-B June 2012 Security Setup The Security feature allows you to protect sensitive functions of the device. At this time only the Field Recalibration functions can be protected. The lock indicator shown in Fig 10 above indicates whether Field Recalibration is locked or unlocked (as shown).

  • Page 16: Figure 11: Password Change Display

    Confirm Password line to reenter the new setting. Press Enter to confirm the new password. The password is 10 characters in length and is made up of any combination of upper case alpha and numeric characters. Figure 11: Password Change Display info@Meriam-Direct.com 1.888.610.7664...

  • Page 16: Figure 11: Password Change Display

    Instruction Manual 9R87-B June 2012 The Change Password function allows you to set a new password. The screen shown in Fig. 11 shown below displays this function. Enter the current password on the first line. Use the Adaptive Interface Wheel and arrow keys to enter the characters.

  • Page 17: Pressure Sensor Setup

    Engineering units selection list. Used to select which units are available when the Units key is pressed Information Displays Sensor Type, Accuracy, Calibration Date, Serial #, and Range NOTE: Pressure Sensor Setup applies to both P1 and P2 sensors. info@Meriam-Direct.com 1.888.610.7664...

  • Page 17: Pressure Sensor Setup

    Instruction Manual 9R87-B June 2012 Pressure Sensor Setup Figure 12: Pressure Sensor Setup Display Reference Function Damping Enable or disable damping and adjust value. Active setting shown to the right. Calibration Zero, Field Calibrate, or Restore Factory Defaults Reset Min/Max Resets Min/Max values Resolution Choose Accuracy or Precision resolution on...

  • Page 18: Damping Setup

    Use the arrow keys and the Adaptive Interface Wheel to set the Damping Rate in seconds. The value can be adjusted between 0 and 32 seconds. Press the Exit key to return to the main Pressure Sensor Setup menu. info@Meriam-Direct.com 1.888.610.7664...

  • Page 18: Damping Setup

    Instruction Manual 9R87-B June 2012 Damping Setup Figure 13: Damping Setup Display Use the Type key to change the Damping Type. The options are a follows: 1) None. The measured value is not filtered or damped. 2) Exp(exponential), which uses a traditional damping algorithm with response delays associated with the Damping Rate.

  • Page 19: Calibration Setup

    Perform a restore defaults function. Lock setting for operation displayed on right. See NOTE below. NOTE: If the Field Recalibration or Restore Defaults functions are locked you must first unlock them to enter the function. See the Security section for more details. info@Meriam-Direct.com 1.888.610.7664...

  • Page 19: Calibration Setup

    Instruction Manual 9R87-B June 2012 Calibration Setup Figure 14: Pressure Sensor Calibration Setup Display Reference Function Zero Perform a zero adjustment of the pressure sensor at the applied input. Field recalibration Enter field recalibration procedure. Functionality is described on the following page.

  • Page 20: Field Recalibration

    5. At the last point the Next key is replaced with a Done key. When you have finished calibrating the last point press the Done key. 6. A Calibration complete screen appears with Exit and Save keys. Press Exit to discard the field recalibration. Press Save to store the field recalibration results. info@Meriam-Direct.com 1.888.610.7664...

  • Page 20: Field Recalibration

    Instruction Manual 9R87-B June 2012 Field Recalibration Figure 15: Field Recalibration Display The Field Recalibration Display contains the following: 1. The current calibration point and number of points displayed at the top. 2. Under “Apply:” in the black highlighted area, the nominal calibration point in the current pressure units for the sensor is displayed.

  • Page 21: Units Selection Setup

    To enable all 32 units press the All function key. To uncheck all the units press the Clear key. Press Exit to return to the main Pressure Sensor Setup menu. NOTE: At least one pressure unit must be selected before exiting. info@Meriam-Direct.com 1.888.610.7664...

  • Page 21: Units Selection Setup

    Instruction Manual 9R87-B June 2012 Units Selection Setup Figure 16: Pressure Units Selection Display This selection list shows which pressure units are displayed when the Units key on the M4 is pressed. The units with the check mark to the right will be displayed.

  • Page 22: Volts/Ma Sensor Setup

    Information Displays Sensor Type, Accuracy, Calibration Date, Serial # and Range NOTE: Description of Mode setup is described in the following pages. Damping and Calibration are described in the preceding pages covering Pressure Sensor setup. info@Meriam-Direct.com 1.888.610.7664...

  • Page 22: Volts/Ma Sensor Setup

    Instruction Manual 9R87-B June 2012 Volts/mA Sensor Setup Figure 17: Volts/mA Sensor Setup Display Reference Function Mode Choose Volts Measure, mA Measure, 24V Source, Volts Source, mA Source, or mA Sink Damping Enable or disable damping and adjust value. Active setting shown to the right. Calibration Perform a Zero, Field Calibration, or Restore Factory Defaults...

  • Page 23: Volts/Ma Mode Setup

    (described on following page) to select manual or automatic current simulation. I Sink Selects the current sink mode. Brings up menu (described on following page) to select manual or automatic current sink. This is also known as transmitter simulation mode. info@Meriam-Direct.com 1.888.610.7664...

  • Page 23: Volts/Ma Mode Setup

    Instruction Manual 9R87-B June 2012 Volts/mA Mode Setup Figure 18: Volts/mA Mode Select Display Reference Function V Measure Selects the voltage measure mode. I Measure Selects the current measure mode. 24V Source Selects the 24V loop source mode. V Source Selects the voltage source mode.

  • Page 24: Volts/Ma Source And Sink Setup

    Auto Ramp Selects auto ramp simulation. Brings up a menu to configure the auto ramp procedure. Start Quick Ramp Starts a quick ramp simulation. The module will continuously ramp between zero and full scale in 15 seconds. info@Meriam-Direct.com 1.888.610.7664...

  • Page 24: Volts/Ma Source And Sink Setup

    Instruction Manual 9R87-B June 2012 Volts/mA Source and Sink Setup Figure 19: Volts/mA Source and Sink Setup Display Reference Function Manual Selects manual simulation. Brings up a menu to set the initial simulation value and start simulating. Auto Step Selects auto step simulation. Brings up a menu to configure the auto step procedure.

  • Page 25: Volts/Ma Auto Step Setup

    Manual, 5 or 10 seconds. Startup Delay: Delay after pressing Start key before (not shown in Fig 20) simulation begins. Brings up edit menu to select the value between None, 30 or 60 seconds. info@Meriam-Direct.com 1.888.610.7664...

  • Page 25: Volts/Ma Auto Step Setup

    Instruction Manual 9R87-B June 2012 Volts/mA Auto Step Setup Figure 20: Volts/mA Auto Step Setup Display Reference Function Start Select to start the Auto Step simulation. Mode: Volts/mA mode for the simulation. For reference only, cannot be modified here. Begin Value: Starting simulation value.

  • Page 26: Volts/Ma Auto Ramp Setup

    Brings up edit display to adjust the value between 1 and 300 seconds. Startup Delay: Delay after pressing Start key before simulation begins. Brings up edit menu to select the value between None, 30 or 60 seconds. info@Meriam-Direct.com 1.888.610.7664...

  • Page 26: Volts/Ma Auto Ramp Setup

    Instruction Manual 9R87-B June 2012 Volts/mA Auto Ramp Setup Figure 21: Volts/mA Auto Ramp Setup Display Reference Function Start Select to start the Auto Ramp simulation. Mode: Volts/mA mode for the simulation. For reference only, cannot be modified here. Begin Value: Starting simulation value.

  • Page 27: Changing Batteries

    The battery door is universal and can be installed in either direction. Figure 22: Changing Batteries Warning – To avoid erratic readings replace batteries when warning message appears. info@Meriam-Direct.com 1.888.610.7664...

  • Page 27: Changing Batteries

    Instruction Manual 9R87-B June 2012 Changing Batteries Loosen the two screws in the battery cover and lift off cover. Remove the batteries by gently applying pressure to the positive side and pull upward. To install batteries (Four (4) AA 1.5 volt alkaline batteries) insert the negative side against the spring and gently apply pressure to lock in the positive side.

  • Page 28: Accessing Sd Card

    There is a Lock located on the side of the SD™ card. When the Lock is pressed down information can only be read from the card. To write or save information to the card make sure it is Unlocked before installing. Figure 23: Accessing SD Card info@Meriam-Direct.com 1.888.610.7664...

  • Page 28: Accessing Sd Card

    Instruction Manual 9R87-B June 2012 Accessing SD Card To install the SD™ card simply insert the card in the slot and press down until you hear a click. The card has only one orientation for correct alignment. Please make sure you are inserting a SANDISK P/N SDSDB-2048-A11 or equivalent.

  • Page 29: Downloading Data Using Usb Interface

    USB cable provided with the unit or via an SD card reader. The Meriam Setup Utility which allows you to download the data is provided on the CD or available at www.meriam.com. Please install the USB drivers before installing the program.

  • Page 29: Downloading Data Using Usb Interface

    USB cable provided with the unit or via an SD card reader. The Meriam Setup Utility which allows you to download the data is provided on the CD or available at www.meriam.com. Please install the USB drivers before installing the program.

  • Page 30: Installing Wire Stand

    Phillips screws. Align the plastic mounting holes with the two brass inserts. Please make sure the straight edge is facing upward toward the pressure manifold as shown in the illustration. Secure the plastic mounting block to the enclosure by tightening the screws. Figure 24: Installing Wire Stand info@Meriam-Direct.com 1.888.610.7664...

  • Page 30: Installing Wire Stand

    Instruction Manual 9R87-B June 2012 Installing Wire Stand All M4 units come standard with an installed rear hand strap and a separate wire stand. To install the wire stand first pull down on the loose end of the Velcro strap to separate it, then carefully pull the strap through the lower bracket.

  • Page 31: Range Specifications

    0 TO 17 PSIA Absolute, Isolated (0-900 mm Hg) AI0038 0 TO 38 PSIA Absolute, Isolated (0-2000 mm Hg) AI0100 0 TO 100 PSIA Absolute, Isolated (0-5200 mm Hg) AI1000 0 TO 1000 PSIA Absolute, Isolated (0-52000 mm Hg) info@Meriam-Direct.com 1.888.610.7664...

  • Page 31: Range Specifications

    Instruction Manual 9R87-B June 2012 Specifications – Range +/- 0.025% of Full Scale unless otherwise noted below. Accuracy statements include the combined affects of TYPE & linearity, repeatability, hysteresis and temperature over the RANGE specified operating temperature range. Warm up time = 5 minutes. Unit should be zeroed at working ambient temperature before use DN0010 0 TO 10 in H...
  • Page 32 Display will read “-----“. Red backlight will illuminate. Certified Range: Sensor is operating within the range of its accuracy specification. NOTE: The over/under range threshold is set in the sensor. The value, as shown above, is typically set to +/-20% of Full Scale. info@Meriam-Direct.com 1.888.610.7664...
  • Page 32 Instruction Manual 9R87-B June 2012 Specifications - Over and Under Range Soft Under & Over Range: Indicates pressure is outside of the accuracy specification of the sensor. RANGE indicator will appear. Hard Under & Over Range: Indicates pressure is significantly outside of the measurement range of the sensor. RANGE indicator will appear.

  • Page 33: Specifications

    Temperature Performance: Included in accuracy specification Voltage & Current Source: DC Voltage Range: 0 – 24 V DC Current Range: 0 – 24 mA Accuracy: (±0.015% of Reading ±0.002 units) Resolution: 0.001 V, 0.001 mA Temperature Performance: Included in accuracy specification info@Meriam-Direct.com 1.888.610.7664...

  • Page 33: Specifications

    Instruction Manual 9R87-B June 2012 Specifications Pressure: Accuracy: ±0.025% of Full Scale Temperature Performance: Accuracy includes all affects of temperature from -20º to +50º C (-4º to +122º F) Engineering Units: 32 user selectable pressure units Pressure Limits: DN sensors: 2x range when pressurized on P1 (HI) side only, 150 PSI when applied simultaneously to P1 (HI) and P2 (LO) sides.
  • Page 34 Power: Four (4) AA 1.5 volt alkaline batteries provide 30+ hours of continuous measurement service or 10 hours of service in 24V Source mode when powering a transmitter at 20 mA output. Meriam recommends the unit be powered up for a minimum of 5 minutes to operate at the full accuracy specification of the instrument.
  • Page 34 Power: Four (4) AA 1.5 volt alkaline batteries provide 30+ hours of continuous measurement service or 10 hours of service in 24V Source mode when powering a transmitter at 20 mA output. Meriam recommends the unit be powered up for a minimum of 5 minutes to operate at the full accuracy specification of the instrument.
  • Page 35 Engineering Units: (32 selectable) PSI, inW20C, inW4C, inW60F, ftW20C, ftW4C, ftW60F, mmW20C, mmW4C, mmW60F, cmW20C, cmW4C, cmW60F, mW20C, mW4C, mW60F, inHg0C, mHg0C, cmHg0C, mmHg0C, torr, kg/cm2, kg/m2, Pa, hPa, kPa, MPa, Bar, mBar, ATM, oz/in2, lb/ft2 info@Meriam-Direct.com 1.888.610.7664...
  • Page 35 Instruction Manual 9R87-B June 2012 Specifications Environmental Conditions: Calibrated: -4 to 122°F (-20 to 50°C) Storage: -40 to 140°F (-40 to 60°C) Humidity: 5 – 95%, non-condensing Altitude: Operating 2000 Meters, Storage 1000 Meters Safety: EMC: EN 61326-1, Class A IEC 61010-1, CAT-1 Voltage Protection Environmental: RoHS, WEEE, Pollution Degree 2 Shock: 1 Meter Drop Test per IEC 61010-1...

  • Page 36: Zeroing And Field Recalibration

    Meriam recommends using primary standards at least 4 times more accurate than the unit under test. For pressure transmitters up to 200 PSI, Meriam recommends a deadweight tester of at least ±0.0015% of reading for field recalibration. For transmitter ranges of 200 PSI and above, a deadweight tester of at least ±0.0030% of...

  • Page 36: Zeroing And Field Recalibration

    Meriam recommends using primary standards at least 4 times more accurate than the unit under test. For pressure transmitters up to 200 PSI, Meriam recommends a deadweight tester of at least ±0.0015% of reading for field recalibration. For transmitter ranges of 200 PSI and above, a deadweight tester of at least ±0.0030% of...

  • Page 37: Applications

    The 24V source mode is located under the VMA setup menu. Field devices with compliance voltage about 19V may not be able to be calibrated. See the load line curve under specifications. info@Meriam-Direct.com 1.888.610.7664...

  • Page 37: Applications

    Instruction Manual 9R87-B June 2012 Applications The M4 is designed to power up a transmitter to calibrate the pressure channel and channel and mA output. The unit under test should be isolated from the process and taken out of the loop before starting the calibration. Please make sure you have the proper sensor and range before starting the calibration.
  • Page 38 In addition to reading gauge pressure the M4 can also be used to measure pressure drop across a pressurized system. Examples include orifice plates, pitot tubes, filters, or valves. A push to read, three valve, or five valve manifold is recommended to avoid damage to the sensor. info@Meriam-Direct.com 1.888.610.7664...
  • Page 38 Instruction Manual 9R87-B June 2012 Applications (continued) If you are using a DN or DI (Differential Pressure Sensor) the high pressure port (P1) is teed into the pressure source and transmitter high side (H) and low pressure port is vented to atmosphere. If you are using a GI or CI (Gauge Sensor) there is only one pressure connection.
  • Page 39 Simply connect the vacuum (or pressure) source to the single port of the manifold. To zero an absolute sensor a full vacuum of 200 micron or less must be applied. info@Meriam-Direct.com 1.888.610.7664...
  • Page 39 Instruction Manual 9R87-B June 2012 Applications (continued) Vacuum calibration can be performed by venting the high pressure connection (P1) and applying vacuum to the lower pressure connection (P2). Atmospheric pressure is the reference for all vacuum measure elements. Absolute pressure calibrations use an AI sensor which has an internal absolute zero reference.

  • Page 40: Contact Meriam

    In the event an M4 requires service or must be returned for repair, please contact Meriam at the numbers listed below. DO NOT send any unit in for repair without first contacting Meriam for a Return Material Authorization (RMA) number. If this number has not been obtained and clearly marked on the return packaging, the unit will be returned at the shipper’s expense.

  • Page 40: Contact Meriam

    In the event an M4 requires service or must be returned for repair, please contact Meriam at the numbers listed below. DO NOT send any unit in for repair without first contacting Meriam for a Return Material Authorization (RMA) number. If this number has not been obtained and clearly marked on the return packaging, the unit will be returned at the shipper’s expense.

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