Nixie Tube Clock ‘Nixie QTC-Four’
Issue 1 (1 December 2019)
www.pvelectronics.co.uk
- 39 -
Setting the Time:
Before setting the time, set DST according to whether you are currently in
DST time or not by toggling the ADJ button. The adjacent DST LED will
light or extinguish accordingly.
From time display mode, press and hold ‘SET’ button for 2 seconds until
the seconds digits are highlighted.
Press the ‘ADJ’ button to reset seconds to zero.
Briefly Press ‘SET’ again and the hours will be highlighted
Press the ‘ADJ’ button to set the minutes.
Briefly Press ‘SET’ again and the hours will be highlighted.
Press the ‘ADJ’ button to set the hours.
Finally, briefly Press ‘SET’ again to revert to normal clock operation.
Night Blanking Override:
During programmed night blanking, the blanking may be overridden to
see the time by briefly pressing the ‘SET’ button. Tubes will remain lit for
the period defined in parameter 15.
Rapid DST Adjustment:
Press ‘ADJ’ briefly to toggle between DST and standard time. The yellow
LED indicator shows whether DST mode is active or not.
Note, that GPS time data does not contain DST information, so the DST
status will need to be set manually in GPS sync mode as well as manual
time-set mode.
Calibration of Timekeeping Accuracy:
Over time you may observe the clock runs faster or slower than an
accurate time standard. You can finely adjust the timekeeping by setting
configuration parameters 10 and 11. We recommend to precisely set the
clock against a known accurate clock, and then record the time drift in
seconds after 5 full days (120 hours). Program this value into parameter
10.
Set parameter 11 to 0 to slow down the clock and to 1 to speed up the
clock.