Slave Clock Function; Standby Operation; Master Clock - Isgus PERFECT 2020 Product Manual

Slave clock function

The "slave clock function" can be released if the option module "POLA" has been
built in and if an external master clock has been installed.
How this option can be released in the recorder, please see section "Set options" on
the previous pages .
Hint
The functions DCF-connection and Slave clock exclude each
other as both functions use the same circuit on the option
module and on the PC-board.
A real POLA-operation is not possible with the PERFECT as slave clock. The POLA-
signal is only used to synchronise the internal quartz clock, i.e. the clock is set to 00
seconds with every POLA-impulse.
During a power failure, the internal quartz clock is operating.

Standby Operation

This option can be released if the battery pack has been installed. How this option
can be released in the recorder, please read in this chapter on the previous pages
"Set options".
With this option, the time recorder will print up to 300 registrations over a power
outage period of 24 hours.
If the recorder is provided with the option DCF-connection as well, the recorder
changes from DCF-connection to the internal quartz clock in standby operation.

Master Clock

This option can be released if the option module "MASTER CLOCK" has been built
in and if the external slave clocks have been connected. How this option can be
released in the recorder, see section "Set options" on the previous pages . The slave
clocks are also defined in the routine to release this option.
Hint
The function MASTER CLOCK can be combined with DCF or
POLA.
If the recorder is provided with the option "MASTER CLOCK", all slave clocks have
to be synchronised.
Chapter 4 Getting Started 4-63