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There are four buttons that have the following functions:

SET:

 Exit tube test routine on cold power-up; Show date; Set: time, date; Enter configuration menu;

ADJ:

 Adjust: time, date, alarm time, configuration parameters;

ALARM:

 Set alarm time; snooze; cancel snooze/alarm;

DST: 

Toggle between DST and Standard time (+/- 1 Hour); Enter colour / Led setup menu.

Setting the Time and Date:

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 minutes 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. Proceed in this fashion to set the calendar: Year, Month and Day. Finally, 

briefly Press 

‘SET’

 again to revert to normal clock operation.

Showing Date:

From time display mode, briefly press 

‘SET’

 button. Date will be shown for 5 seconds, then revert to time 

display.

Manual RFT Call:

In DCF / MSF modes, pressing 

‘ADJ’

 briefly during time display will initiate a manual time seek for maximum 

6 minutes, or until a valid time frame is received.

Setting Alarm:

Press the 

‘ALARM’

 Button. The seconds digits show the on / off status of the alarm: 00 or 01 (off or on). Set 

on / off status, then minutes followed by hours by using the 

‘ALARM’

 and 

‘ADJ’

 buttons. When set, the 

alarm LED will also light (if fitted on the clock)

Cancelling Alarm:

Press 

‘ALARM’

 briefly to cancel alarm and enter snooze mode, or a longer press until the clock bleeps, to 

cancel snooze. Alarm remains set for the next day.

Rapid Daylight Savings Time Adjustment:

Press 

‘DST’

 briefly to toggle between DST and standard time. The indicator (where fitted) shows whether 

DST mode is active or not. If the time has been synchronised from DCF or MSF sources, this light will be set 
or cleared automatically. It can still be manually overridden, however the system will re-set the DST status 
again at the next valid time sync.

Note, the GPS time date does not contain any 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:

If you are not using a GPS or WiFi signal to set the time, the clock uses an inbuilt quartz crystal to regulate 
time. However 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 20 and 21. 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 20. Set Parameter 21 to 0 to slow down the clock, or 1 
to speed it up.

Entering configuration menu:

The principal settings of the clock are stored in flash memory – your preferred configuration is stored even 
after powering off the clock for extended periods. To access the configuration mode press and hold the 

‘SET’

 button. After 2 seconds the seconds will become highlighted. Continue holding the button a further 2 

seconds until the clock displays in this format: 00-XX-99. The ‘99’ in the seconds digits tells you that you 
are in the configuration menu. In configuration mode the hours digits display the current parameter being 
adjusted, and the minutes digits display the current value stored against the parameter. For each parameter, 
and referring to the table below, scroll through the range of possible values by pressing the 

‘ADJ’

 button. 

When the desired value has been reached, move on to the next parameter by pressing the 

‘SET’

 button. 

When the last parameter has been set, pressing 

‘SET’

 one more time will revert the clock back to time 

display mode. The first parameter (0) cannot be changed as it is the software revision number. It will show 
for several seconds and then move to parameter 1. In all correspondence on support issues, please quote 
the board type, revision date and software version.

Notes:

1.  

Master Blanking Mode has priority over Night Mode. Use to disable the clock on weekends (i.e. clock 
is in office), or during office hours (i.e. clock is at home). Complete HV shutdown to save power and 
optimise tube life.

2.  

Night time neons mode is active when night mode is set to dim. During night time blanking the tubes 
AND neons are disabled.

3.  

Clock is fully functional without GPS  / Wifi / Transponder synchronisation. Set time manually.

4.  

Enter your time zone offset from the synchronisation source. Note that GPS transmits UTC so you 
have to set DST Manually

5.  

Visual effect / cathode poisoning prevention – all digits on all tubes are cycled for 10 seconds. This 
setting overrides night blanking or dimming for the duration of the effect (10 seconds).

7.  

Date will be displayed each minute between 50 and 55 seconds past the minute.

8.  

Press ‘Set’ Briefly during night mode to show time for prescribed period.

9.  

Set this parameter to ‘1’ to restore original default settings. Internal operations will then load all the 
original settings and restore the value to ‘0’

Configuring the LED backlights:

The clock features a separate and dedicated setup menu for the LED tube backlights, accessed from the 

‘DST’ 

Button. All settings are stored to non-volatile memory and a remembered in the event of power loss. 

The feature allows you to set your favourite colour for any hour of the day, or to cycle through all colours.

Entering the LED menu:

Press and hold the

 ‘DST’

 button, until the display shows “00:_ 0:00” the 3rd tube will not be lit. To get any 

colour, we use a Red, Green and Blue LED. The display indicates the hour on the first 2 digits, then a gap 
and the last 3 digits indicate the amount of 

Red

 / 

Green

 / 

Blue

 respectively.

• 

For each Hour (0-23), you can set a custom colour

• 

Each custom colour can have your choice of Red, Green and Blue values from 0 (off) to 8 (maximum 
brightness )

• 

The other buttons adjust each colour (

‘SET’

 = 

Red

 / 

‘ADJ’

 = 

Green

 / 

‘Alarm’

 = 

Blue

 )

• 

Use low values (1,2 and 3) for low brightness, eg. For night time

• 

Set the value to ‘0’ for that colour to be off.

• 

Once you are happy with the colour for that hour, press 

‘DST’

 to move onto the next hour

• 

While you are adjusting colour, the colour on the clock changes in real time to show.

Setting auto colour cycling:

Setting colour Red (

‘SET’

 Button) to a value of 9 has a special meaning: This will enable auto colour cycling 

for the specified hour. The speed of the cycling will then be governed by the Green (

‘ADJ’

) Value:

0 = very slow change, through to 9 = very fast change.

Note: the colours do not cycle live during auto colour cycling setup. The cycling only starts during normal 
time and date display.

Maintenance:

The Nixie tubes are good for approximately 20 years, some versions of clock will have tubes that can be 
unplugged and swapped, other clocks will have tubes that will need to be returned to the workshop to be 
replaced. There is no real maintenance that is required other than periodic dusting or polishing of the case. 

Warranty:

All clocks and tubes come with a years warranty from purchase date as standard. Tube failures are rare, 
even though the tubes are some 40 years old before they are used by us to make into a clock.

HOW TO OPERATE YOUR 

6 TUBE NIXIE CLOCK

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