|The duration of the external time signalling is standard for all external signalling devices. Unlike the LTR-512 Master Controls, the duration cannot be set differently for different times of day. It has a factory-default of 5 seconds. To set change the duration:
When the cover is placed, the face time will set itself to match the digital display on the top.
- Remove the top cover.
- Press SELECT until the EXT. ALARM button is lit.
- Press the Plus button () to move the Signal Length forward.
- Press the Minus button () to move the Signal Length backward.
- Press Set.