Rate:
Daily rate is the time difference between the clock being tested and the standard time (radio controlled clock).

Reading:
The time that the clock displays.

Regulation:
Refer to fine or rough regulation.

Regulator dial:
Classic precision clocks have this special way of displaying time with separate dials for hours minutes and seconds. This avoids the need for motion work but requires the gear train to be modified so that one arbor (for the hour hand) turns twice a day. The hour hand never obscures the seconds dial.

Regulation nut:
Knurled nut at the lower end of the pendulum. With the regulation nut the pendulum bob can be raised or lowered. Shifting the bob upwards makes the clock faster.

Regulation pin:
Stainless steel pin which has to be inserted into the lateral hole at the tip of the pendulum. With this pin you can hold the pendulum when turning the regulation nut and avoid damage of the suspension spring.

Regulation weights:
Small metal pieces that make the clock run faster when put on the regulation table. With the regulation weights you can adjust your clock to an accuracy of a few seconds a month.

Rough regulation:
Adjusting the accuracy of the Clocks with the regulation nuts at the tip of the pendulum. You can adjust Sattler Clocks up to ca. 1 sec. a day.

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