• Will work straight out of the box.
• Gives a 24 V pulse every minute, every 30 seconds, or every second. These voltage pulses are used to drive slave clocks used in institutions like factories, offices, and schools.
• Easy to use Windows program to change pulse interval, pulse length and pulse polarity. No driver installation required. Supported operating systems: Windows 7 / 8 / 10.
  
• Factory calibrated for 1 second accuracy within a month.
  
• Crystal fine tuning to re-calibrate the device if necessary.
• Will produce either unipolar or bipolar (polarity reversing) clock pulses.
• Provides a maximum output current of 50 mA.
• Very low quiescent current consumption for maximum battery lifetime. The typical battery lifetime using eight AA batteries is between 8-12 months for a one minute pulse clock, but this highly depends on your slave clock device and can be longer or shorter.
  
• 6-12 VDC input voltage.
  
• 9 volts battery snap included!
• (Battery holder not included.)
• If you have a slave clock using working voltage less than 24 volts, you can calculate the value for the required series resistor in http://hasseb.fi/masterclock/series_resistor_calculator.html
  

Download the instructions and control software from http://www.hasseb.fi/masterclock/

Questions and answers

Q: Does the device work with my 120/130 VAC clock?
A: The device gives out 24 V pulses, thus unfortunately it does not work with 120/130 VAC clocks.

Q: Does the device work with my clock?
A: Several clocks from Westerstrand, IBM, Solari, Bodet, and Brillie have been tested to work. The device gives out pulses with a voltage of 24 volts. Most slave clocks work with 24 volts, you should find the working voltage near the clock mechanism. You can also try to give a voltage of 24 volts to your clock using any 24 volts power supply, and thus test does it work with 24 volts.