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METERBRIDGE
R-55e / July 2004
The clock can also be synchronized to external 60Hz or 1Hz signals. To
synchronize to a 60Hz signal, connect the signal to CT3 pin 1, using CT3 pin
2 as the ground reference, and enable synchronization to 60Hz by turning
SW7 position 3 on (SW7 position 2 should be off). To synchronize to a 1Hz
signal, connect the signal to CT4 pin 1, using CT4 pin 2 as the ground
reference, and enable synchronization to 1Hz by turning SW7 position 2 on
(SW7 position 3 should be off).
Standard operation is 12 hour mode, but the clock can be switched to
24 hour mode by turning SW7 position 1 on.
For operation in areas with low ambient light, the display can be dimmed
by turning SW7 position 4 on.
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