The LM Series MCU (microcontroller unit) LCD (liquid crystal display) Hour Meters and Counter 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 or counts of equipment use for potential use in transportation applications to assure proper maintenance of expensive machines or systems, as well as warranty claims and rental-use tracking.
Features
- Round with bezel
- Running indicator
- Reverse polarity
- Load dump, inductive, and EMI transient immunity
- Makroblend® case material
- Lexan® lens
- 1/4 in. blade terminals
Specifications
Case depth:
1.35 in (including terminals)
Digital range hours:
0 to 99,999.9 hours with auto turn over
Digital range counts:
0 to 999,999 counts with auto turn over
Digital height:
7 mm
View angle:
12 o’clock
Accuracy:
±200 ppm/hour
Operating voltage range:
9 V to 64 V dc/ac (50 Hz to 500 Hz); 50 Hz for counter enable
Sealing:
IP67 (front); IP66 (back)
Shock:
55 g per SAE J1378; 75 g per MIL-M-3917D
Vibration:
20 g per SAE J1378; 10 g per MIL-M-3917D
Humidity:
95 % non-condensing at 38 °C [100.4 °F]
Operating temperature:
-40 °C to 85 °C [-40 °F to 185 °F]
Storage temperature:
-50 °C to 90 °C [-58 °F to 190 °F]
Power consumption:
0.8 mA @ 12 Vdc
Start time:
<1 s; if including all “8” check, then >1 s
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