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Chapter 21: Specifications
Specifications
Timer accuracy ± 1 microsecond at 21ºC
Maximum RPM Greater than 30,000 (max is PC dependent)
Minimum RPM 4 RPM approximately
Timer Crystal oscillators
Technology Digital, dual microprocessors
Operating temperature -35ºC to +65ºC
Communications USB to computer, optical isolation for galvanic decoupling from control unit and sensor
Power supply 7 -18 Volts DC external battery or supply
Current draw Less than 50mA (excluding additional connections for acquisition or outputs)
Sensor Hall (magnetic sensing), optional Hall (iron sensing) or optical (infrared reflective)
Sensor air gap 1.5 mm optimally for magnet sensing (standard supplied sensor)
Auxiliary outputs 3 outputs, 500 mA can be sunk (i.e. switches to ground to activate a relay)
Input channels 5 analogue inputs, 1 digital input. Common grounding
Input digital (RPM adapter) Active low timing input, internal pull-up. Not for direct connection to ignition systems!
Input voltage 0-5 Volts and 0-15 Volts ranges, switch selectable
Input resolution 5mV (when 0-5V range selected else 15mV), 10 bit analogue to digital conversion
Reference Supply sourced, software compensation (or offset) can be applied
Input impedance Greater than 10KΩ
Dimensions Approximately 110L x 83W x 45H (mm), excluding mounting tabs
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