0-523-78 Durite 12V-24V 0 to 4,000rpm Tachometer and Engine Hour Counter

 Durite 0-523-78, 12 and 24 Volts DC selectable, 0 to 4,000rpm tachometer and analogue engine hour counter.

• Voltage: 12-24VDC.
• Matt black face and white figures.
• Requires 86mm dashboard hole.
• Bridge type fitting.
• Illuminated.
• 270° sweep.
• Programmable alternator pick-up.
• Pack Quantity: 1 piece.

Installation Instructions for translation Purposes

1. Select the system voltage on the back of the gauge via the voltage selector switch. The gauge is fitted with a 12-volt bulb for illumination, but a spare 24-volt bulb is supplied. Find a suitable position to mount the meter, with 100mm clearance behind, and cut an 89mm hole to suit.
2. Connect the terminal ‘LT’ to the panel light circuit, terminal ‘G’ to ground (negative), terminal ‘I’ to an ignition feed (positive) and terminal ‘S’ to the alternator sender terminal ‘W’.
3. Calibrate the frequency in ‘Hz’ by the image (main images) formula.
4. When you have calculated the frequency in Hz, set the calibration switch to the corresponding position, then start the engine to check operation. (NB. The tachometer needle may rest in any position in transit or storage, but will zero itself when connected).
5. For fine calibration, rev the engine to its off-load governed limit and make final adjustments with adjusting tool provided to the screw under the red seal marked ‘Cal’. Now, fit the meter into the dashboard using the clamp provided.