SMITHS Classic Gauges General Specifications
Operating temp range -20°C to +70°C
Speedometers and Rev Counters, available to fit 80mm and 100mm diameter apertures, minor gauges fit 52mm apertures
Mechanical Speedometers - Calibration and Connection
Mph speedos set at 1000 cable revs per mile, Km/h speedos set at 625 cable revs per km.
80mm diameter variants feature SAE cable connection and remote trip reset, 100mm diameter variants feature SAE cable connection front trip reset.
Indicated speed tolerance 0% to +5%
Speedometers, electronic specification
Negative earth vehicles only, 12 volts operation, calibration fully programmable up to 125,000 pulses per mile or kilometre.
Factory calibration 8380 pulses per mile or kilometre
Power consumption less than 100mA, compatible with all types of electronic senders.
Indicated speed tolerance 0% to +5%, Odometer tolerance +/-2%, Odometer - up to 999999 miles/km, Trip up to 999.9 miles/km
Tachometers (all are electronic) Calibration: Petrol engines 1 to 12 cylinders
Diesel engines alternator driven from 8 to 29 pulses per engine rev
Red 'max hand' pointer, adjustable via screw positioned in centre of instrument window.
Negative earth vehicles only, 12 volts operation, Operating power consumption less than 75mA, Tolerance +/-3% of full scale
Input signal options conventional ignition coil, ecu output (square wave and open-collector), camshaft senders, alternator 'W' terminal, etc.
Mechanical: Oil pressure, 100psi full scale, available in 70 degree sweep and 270 degree sweep. Connection 1/8" gas pip end
Water temp, 30 to 110 deg C, 'K' type bulb, 3/8" BSP female thread, supplied with 5/8"UNF adaptor
Oil temp: 40 to 140 deg C, 'K' type bulb, 3/8" BSP female thread, supplied with 5/8"UNF adaptor
Dual Oil pressure/water temp: 100psi/90-230 deg F, 1/8" gas pip end, and 'K' bulb
Electrical: Ammeter, directly driven with full current. 2 off 9.5mm spade terminals. +/-30 amps or +/-60amps scales
Voltmeter, 2 off rear terminals, connected to ground and switched ignition
Clock: 2 off rear terminals, connected to ground and permanent battery
Oil Pressure, 100psi full scale, directly driven from switched ignition.
Fuel Contents: driven from 10 volt regulated supply
Coolant Temp, 50 to 140 deg C, driven from 10 volt regulated supply
Oil Temp, 50 to 140 deg C, driven from 10 volt regulated supply
Voltage regulator 10 volt output. Semiconductor type, required for fuel and temp gauges.