HASSEB MASTERCLOCK User manual

February
25, 2018
HASSEB MASTER CLOCK, SLAVE CLOCK IMPULSER INSTRUCTIONS
MANUAL VERSION 1.3
HASSEB MASTERCLOCK
hasseb MasterClock is an easy to use master clock to drive slave clocks used for
example in institutions like factories, offices, and schools. The device sends 24
volts voltage pulses every minute or every 30 seconds to drive the clock. The
device provides up to 500 mA driving current, so multiple slave clocks can be
attached. The device utilizes simple Windows software to control the settings
and fine tune the crystal.
INSTALLATION
The device has a two wire connector to attach the slave clock(s) to the device.
Depending on the settings, unipolar or bipolar pulses are sent out every minute,
every 30 seconds, or every second to drive the clock.
Many slave clocks have three wires instead of two, to drive the solenoid of the
clock mechanism. Normally the third wire is used to synchronize the clock every
hour, and can be joined with one or the other of the wires. In most cases hasseb
MasterClock is capable to drive also three wire slave clocks. However, it is your
responsibility to check the connection of your particular device!
ADJUSTING TIME
The time can be adjusted by pressing the push button. The device will send a
single pulse every time you press the button. If you keep the button pressed, the
device sends successive pulses at the interval of two pulse length times.
CONTROL PROGRAMS
By default the MasterClock will send a bipolar pulse every minute with a pulse
length of 500 ms. If the default settings are not suitable for your slave clock, an
easy to use Windows program can be used to configure the MasterClock device.
The Master Clock is a stand-alone device, thus the USB cable needs to be
connected only when configuring the device.
The MasterClock is visible to the host computer as a human interface device,
such like mouse or keyboard, and requires no drivers. After starting the
MasterClock.exe software “Device found.” text should be visible on the bottom
left corner of the software. If you see a text “Device not found. Please restart the
program.” check that the power is on (green LED on), recheck the device USB
connection and restart the program.

February
25, 2018
HASSEB MASTER CLOCK, SLAVE CLOCK IMPULSER INSTRUCTIONS
MANUAL VERSION 1.3
Figure 1. The MasterClock device is configured using a simple Windows program.
Due to the manufacturing process and environmental conditions, such as
temperature and relative humidity, the frequency of the crystal of the
MasterClock device may vary. The control software features a fine tuning
function to calibrate the crystal. The calibration is carried out by setting the error
in seconds within a month.
LEDS
There are two LEDs to indicate the status of the device. The LED burning
continuously indicates that the device is powered and on. The other LED will
toggle when 24 V pulse is sent to the slave clock line. The toggling LED will also
blink fast, when settings are sent through the USB port.

February
25, 2018
HASSEB MASTER CLOCK, SLAVE CLOCK IMPULSER INSTRUCTIONS
MANUAL VERSION 1.3
Specifications
Input voltage
24 ± 0.5 VDC
Maximum input current
0.5 A
Output voltage
± 24 V
Maximum output current
500 mA
Operating temperature
0 –50 C
IP class
21
Dimensions
65 mm x 65 mm x 30 mm
Weight
100 g
Supported operating systems
Windows 7 / 8 / 10