20
To recover the cathodes perform the following steps:
1.
Remember the tubes and digits with non-uniform glow.
2.
Switch the clock power supply off.
3.
Remove the tubes out of the clock by pulling them strictly vertically
upwards.
4.
Insert the tube to be recovered into the extreme right socket (minute units
socket). Other sockets may be left empty.
Attention! Electric shock hazard! The tube sockets are under high voltage. Do
not touch the contacts to avoid electrical shock.
5.
Press and hold the right-hand (TIME) and left-hand (LED) buttons
simultaneously and switch the power supply on. The clock will switch over
to the tube cathode recovery mode.
6.
Using
“
+
”
and
“
-
”
buttons select the digit to be recovered in the tube.
7.
The Nixie tube recovery process will start. Hereby the tube will glow
brighter and heat stronger. It is necessary to visually check the recovery
process end. For this purpose the cathode recovery mode is de-actuated
for 3 seconds every 30 seconds and the tube operates in the normal mode
(with a normal brightness). At this time visually assess whether the non-
uniform glow areas are still present in the digit selected. Continue the
process until the digit uniform glow has been completely recovered.
8.
Using
“
+
”
and
“
-
”
buttons select the next digit to be recovered in the tube
and repeat Step 7 until all the digits in the current tube have been
recovered.
9.
Switch the clock power supply off. Remove the recovered tube. If another
tube needs recovery, repeat Steps 4-8. When all the tubes have been
recovered, install them into the clock and switch the power supply on for
the clock normal operation.
