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Overview

Honeywell LM Series Hour Meter in a diamond shape with black bezel, three 1/4 inch blade terminals (positive, negative, enable), 9 V to 64 V voltage range, and the Honeywell logo on the face.
Honeywell’s MCU (microcontroller unit) LCD (liquid crystal display) Hour Meters, LM Series, are sealed digital instruments designed to monitor and record elapsed running time, normally displayed in hours and tenths of hours. These devices are used to log running time of equipment used in transportation applications to assure proper maintenance of expensive machines or systems. This maintenance typically involves replacing, changing, or checking parts, belts, filters, oil, and lubrication of heavy duty equipment, or running condition of engines, motors, and blowers, to name a few. These devices feature a 40-year memory data retention (without power) to provide customers with a long data retention capability within their desired application. The large 7 mm display eases readability and offers backlight options and a running indicator. Sealing to IP67 provides enhanced durability. The hour meter also features a long reset time to offer customers the protection against malfunction of reset. The LM Series offers customization options including the customer’s logo, Honeywell logo, or a black face, as well as numerous customizable port options.
LM-HH3AS-H11 Hour Meters - Honeywell


Technical Specifications

Product Type MCU (Microcontroller Unit) LCD Hour Meter
Function Hour Meter
Appearance Deluxe
Mounting 2 Screw
Voltage 9 V to 64 V
Volts ac 9 V to 64 V
Bezel Black
Hours 0 to 99,999.9 hours
Run Indicator Yes
Logo Top Honeywell
Logo Bottom Hours
Terminal 3
Termination 1/4 inch Male Blade
Lens Lexan
Power Draw 0.8 mA at 12 Vdc
Transient Voltage Protection Load Dump, Inductive, EMI, Reverse Polarity
Temperature -40 °C to 85 °C [-40 °F to 185 °F]
Quartz Accuracy ±200 ppm/hour
Vibration 20 g per SAE J1378; 10 g per MIL-M-3917D
Shock 55 g per SAE J1378; 75 g per MIL-M-3917D
Sealing IP67
Inductive Switching Yes
Reverse Polarity Yes
Number Size 7 mm [0.28 in]
Display 0 to 99,999.9 Hours, backlit
Agency Approvals and Standards UL, CE
Availability Global
Comment Hour Meter
Series Name LM

Technical Specifications

Product Type MCU (Microcontroller Unit) LCD Hour Meter
Function Hour Meter
Appearance Deluxe
Mounting 2 Screw
Voltage 9 V to 64 V
Volts ac 9 V to 64 V
Bezel Black
Hours 0 to 99,999.9 hours
Run Indicator Yes
Logo Top Honeywell
Logo Bottom Hours
Terminal 3
Termination 1/4 inch Male Blade
Lens Lexan
Power Draw 0.8 mA at 12 Vdc
Transient Voltage Protection Load Dump, Inductive, EMI, Reverse Polarity
Temperature -40 °C to 85 °C [-40 °F to 185 °F]
Quartz Accuracy ±200 ppm/hour
Vibration 20 g per SAE J1378; 10 g per MIL-M-3917D
Shock 55 g per SAE J1378; 75 g per MIL-M-3917D
Sealing IP67
Inductive Switching Yes
Reverse Polarity Yes
Number Size 7 mm [0.28 in]
Display 0 to 99,999.9 Hours, backlit
Agency Approvals and Standards UL, CE
Availability Global
Comment Hour Meter
Series Name LM

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
LM Series MCU (Microcontroller Unit) LCD Hour Meter Product Sheet Datasheet English 1MB
LM-HH3AS-H11_highres_photo Photo English 2MB
LM-HH3AS-H11_lowres_photo Photo English 220KB
50082092: LM Series MCU (Microcontroller Unit) LCD Hour Meter Installation Instructions Installation Instructions English 593KB
True Time Stamp - Hour Meters Case Study English 345KB
LM Series MCU (Microcontroller Unit) LCD Hour Meter Nomenclature Tree Product Nomenclature Tree English 876KB
Sensors and Switches in Mobile Cranes Application Note English 2MB
Hour Meters Line Guide Product Line Guide English 571KB
Industrial Product Line Card Line Card/Selection Chart English 2MB
Controls, Monitors, and Pressure Switches Range Guide Product Range Guide English 2MB
Transportation Range Guide Product Range Guide English 4MB
Partners Providing Technical Safety and Productivity Solutions Product Range Guide English 11MB

Product Features

  • Backlight and large 7 mm display ease readability
  • Digital, microcontrol unit LCD
  • Durable design of mounting assembly
  • IP67 environmental sealing provides enhanced durability
  • Customizable with customer’s logo, as well as numerous customizable port options
  • Function types, including hour meter (measures time) or counter (measures number of instances, starts, etc.)
  • Fast delivery of samples and products due to Honeywell’s integrated supply chain and global design center
  • Shock and vibration resistance allow for use in a wide variety of tough applications
  • UL/CE approvals

Applications

  • Agricultural vehicles
  • Blowers
  • Engines
  • Heavy-duty construction vehicles
  • Heavy-duty trucks
  • Material-handling equipment
  • Mowers

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