User manual – Glass Clock Design #3
rev 1.2
5.6.6
Option 6 – Anti-cathode poisoning function
This option selects the anti-cathode poisoning function. This option
will enable/disable anti-cathode poisoning function for the display.
'00' = disable anti-cathode poisoning function.
'01' → '23' = selects which hour anti-cathode poisoning starts.
Anti-cathode poisoning mode helps prevent a condition in Nixie
tubes where the cathodes (the individual digits) that aren't used often
will be 'poisoned'. This is where deposits build up on the digits. When
these deposits are thick enough, parts of the digit will not light up.
This mode will cycle all the tubes through all the digits at full
brightness 4 times, exercising the digits, preventing cathode
poisoning.
A blinking '00' → '23' will be displayed in the 2 rightmost digits, with
the colon on. To change the enable time, press the black function
button (left side). Holding the function button on will quickly cycle
through the hours (0-23). Press the red mode button when the desired
anti-cathode poisoning enable time is displayed. The next option will
be displayed.
To cancel the option function, press and hold the red mode button
until the display goes blank. Release the mode button and the clock
will go back to normal operation. Option 1 - 4 will still be saved, but
option 6 will not be saved.
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