User Manual
Alarm Transmitter U971
TD 90934GB
2000 01 17 3
1 Introduction
This document provides a description of the Alarm Transmitter U971 and its
functionality. The U971 is included in the Personal Security System (PSS). This User
Manual describes the U971 in default programmed version. Additional functions
and factory settings are also included, providing a full description of the functionality.
Your product may not supply all functions described in this document, for informa-
tion about your product, contact your system administrator.
The following documents are recommended as a complement:
• Operation Alarm Transmitter U971 TD90671GB
Fig 1. Alarm Transmitter U971 with optional wristwatch strap
2 Description
U971 is an alarm transmitter with a limited radio coverage area (about 100 meters
under open conditions).
The transmitter is as small as a wristwatch and is carried with a clip on an article of
clothing. Optionally it can also be delivered with a wristwatch strap or a fastening
loop for a key ring or a necklace.
2.1 Alarm Activation
U971 can activate three alarm types: normal pushbutton alarms, test alarms, and
assistance alarms.
Pushbutton Alarm
Two short presses on the alarm pushbutton within two seconds transmits an alarm.
The transmitter then transmits an unique radio code to the central equipment and
alarm measures can be taken. The alarm transmission (with possible repetitions) is
confirmed by three short LED-flashes.
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