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How to set the time
In order to set the time, the minute hand may be turned forwards as well as backwards. The
clock shoult be set so that the moon phase display always change at night. The second hand
shall not be turned. In order to synchronise the second hand to that of another clock (e.g. a
radio clock) stop the pendulum, when the second hand has reached the mark of the sixtieth
second. Let the pendulum go, when the second hand of the clock of comparison reaches the
sixtieth second.
How to adjust the clockwork
Your clock has been exactly adjusted in our workshop. The transport, the sea level and the
geographic latitude of the place where the clock is hung up may however lead to a variation
in the period of oscillation of the pendulum. You will therefore most probably have to adjust
your clock once again.
Please proceed as follows:
a)
Coarse adjustment:
Should the accuracy deviate by more than one second per day, it is necessary to adjust
the clock by the adjusting nut.
Please stop the pendulum first. Now put the regulation pin, enclosed in the etui, into the
hole below the counter nut in the pendulum rod. Hold it tightly to avoid a twisting of the
delicate suspension spring during adjustment.
Loosen the lower nut, the counter nut, and then screw the adjusting nut approx. one line
to the left per second gained per day (elongation of the pendulum), i.e. approx. one line
to the right per second lost per day (shortening of the pendulum). Afterwards screw the
counter nut slightly up again for protection.
Now take your time and watch the accuracy of your clock a couple of days. If necessary,
you may readjust the clock as described above.
Compensation tube
Regulation nut
Lock nut
Pendulum rod
Hole for regulation pin
b)
Precision adjustment:
For precision adjustment of the clock, i.e. for the correction of small deviations of accuracy,
you need not stop the pendulum.
An adjusting table is situated at the middle of the pendulum rod. You can accelerate the
pendulum by placing the small nickel silver weights, enclosed in the etui, onto the
adjusting-table. The heavier the timing weight, the greater is the acceleration of the
pendulum, i.e. the faster goes the clock.
By taking away a timing weight, the period of oscillation of the pendulum is lengthened,
i.e. the clock goes slower.
If you need even finer tuned weights for fine adjustment, you will find in our range of
accessories a sorted set of 12 certificated weights
c)
How to correct deviations of 1 - 2 seconds from standard time:
You can correct deviations of 1 - 2 seconds from standard time with the aid of the two
stainless steel weights also enclosed in the case. You neither need to stop the pendulum,
nor the second hand. One of the weights should thus always be located on the adjusting
table.
In case the second hand deviates approx. minus 1 second from standard time, place the
second weight onto the adjusting table as well. As soon as the deviation is recovered,
take the weight off again.
A deviation of approx. plus 1 second shall be corrected by occasionally taking away the
weight permanently located on the adjusting table.
Due to the fact that every place on earth has a different gravitation, a clock that runs +/- 0 sec
in Munich/Germany will gain or loose time if it is located somewhere else.
As an example see the list below:
Place
Gravitation
Fast
Slow
g in cms
-2
in sec./Tday
in sec./day
Bangkok
978,321
106,2
Berlin
981,288
24,4
Budapest
980,852
5,2
Bukarest
980,554
7,9
Göttingen
981,176
19,5
Hamburg
981,375
28,2
Madrid
979,981
33,1
München
980,733
0
0
Nürnberg
980,942
9,2
Rom
980,347
17,0
St. Petersburg
981,925
52,5
Stockholm
981,843
48,8
Pendulum rod
