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4.2 Mode of operation
The main clock 20097 controls and operates analogue (optionally as well digital) secondary
clocks by impulses.
A highly precise quartz-controlled oscillator with an average accuracy of ± 0,05 s/24 h
provides the control pulse for the main clock's UTC. Or if a GPS receiver is connected its
receiver signal provides the control pulse.
When travelling through different time zones, the LT of the main clock has to be adjusted
manually. Analogue secondary clocks are readjusted automatically after the preset interval.
MOBALine-secondary clocks set themselves automatically after 3-4 s. Digital secondary
clocks adopt the modified LT without time delay.
4.3 Accessories
4.3.1 Secondary clocks
We offer a wide range of secondary clocks. Please contact us for a presentation of our
assortment.
4.3.2 Extension cards
Depending on the customer's specification, the following extension cards are included in the
delivery or optionally available ( see also "Appendix", section "Extension cards"):
•
digital clocks extension card
for the operation of digital secondary clocks
•
MOBALine extension card
for self-adjusting secondary clocks
•
analogue clocks extension card
for the operation of more than 100 forwards or 50 forwards and backwards
running analogue secondary clocks.
•
serial extension card
for the operation of two different protocols with a differing data frame
4.3.3 Accumulator
The unit is fitted with an accumulator as power reserve. Only when the accumulator is
completely discharged, the clock switches itself off automatically.
The following accumulator types are used:
•
pbq VRLA accumulator 0.8-12
•
Le Long WP0.8-12
•
or comparable accumulators with identical performance
NOTICE!
Do only use these accumulator types or comparable accumulators when replacing the
accumulator (see also section "Maintenance").
V3.2 12/2014
WEMPE digital main clock 20097
Design and function
15
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