2020 Blue Sea Systems Catalog

bluesea.com 138 METERS Flat panel mount Surface mount M2 OLED Digital Meters The M2 Organic LED Digital Monitor measures essential electrical system parameters with adjustable alarms and an auto-dimming display. The M2 Monitors include a MOSFET External Circuit Relay (ECR) which can be used to control external circuits based on any value measured by the M2. • Auto-dimming, bright Organic LED display is easy to read • 80dB alarm on all models • Isolated 500mA MOSFET relay • Includes external DC Shunt or AC Current Transformer when required Display Size 55mm x 28mm Power Supply Voltage 7V–70V DC* Range (Power Consumption) 0.3W–1.0W * Variable with voltage, display intensity, and sleep mode Regulatory Monitor face is IP66 - protected against powerful water jets when installed according to instructions (see inside back cover) Related Products ML-Series Remote Battery Switches p. 39 Floyd Bell Turbo Series Alarm p. 150 M2 OLED Mounting Options 1830 1525 (meter not included) PN Description Width in (mm) Height in (mm) 1525 360 Blank Panel - M2 OLED 4.88 (123.83) 4.75 (120.65) State-of-Charge Battery State-of-Charge (SoC) Knowing the State-of-Charge of your battery is like knowing the amount of fuel in your gas tank. To avoid getting stranded with a dead battery, accurate battery bank monitoring is essential. Voltmeter Method— Voltage can be used to measure the SoC of your battery. The difference from a fully charged battery to a fully discharged battery is only 1.0V in a 12V system, so the meter must have good resolution and accuracy. This method is generally sufficient to monitor batteries which experience intermittent use, such as starter or thruster batteries. However, a battery must not have been charged or discharged for over 12 hours for this measurement to be trustworthy. This makes the Voltmeter Method unsuitable for monitoring house batteries which charge and discharge often. Amp-Hour Method— A convenient and accurate way to measure SoC is with an Amp-Hour Monitor. This is a complex calculation of the energy available, energy consumed, and energy returned to the battery during charging. SoC is commonly expressed as a percent of amp-hours remaining until the battery is empty, but can also be expressed as amp-hours used, amp-hours remaining, or time remaining. The advantage of this method is that it works well for batteries in a constant state of charge and discharge. DC Shunts p. 147 AC Current Transformer p. 147 Temperature Sensor p. 147 M2 OLED Surface Mount Nut Finger Tighten Only! Locking ring MUST go on before mounting nut B U L K H E A D 1" MAX Panel Thickness (25mm) 2.37" (60.07mm) 0.72" (18.31mm) Mounts in a 2-1/8" (54mm) DIA Hole Gasket Seal 5 YEAR WARRANTY

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