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5.
WIRELESS EMERGENCY BUTTON
5.1
Introduction
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The WT-211 is a miniature waterproof wrist-worn transmitter, designed to send coded transmissions to the
EasyAlarm®
.
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Pressing the pushbutton at the centre of the unit activates transmission.
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All WT-211 units are supplied with a wristband, to be worn like a regular watch.
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Operating power is obtained from a coin-type, 3-volt lithium battery that can last up to 10 years.
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A LED lights during transmission, indicating that battery voltage exceeds 2.7V.
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If the LED lights dimly or does not light at all during transmission, the battery must be replaced
immediately.
5.2
Technical Specifications
Frequency: 433,92
MHz
Coding:
8-bit DIP-switch (256 combinations)
Transmission time:
approx. 2 seconds
Power supply:
3 V-Lithium-Battery (life time: 3-5 years by 3 usages per day)
Warning:
The transmission power is directly related to the power of the battery.
Temperature range:
0°C
to 50°C
Dimensions:
35 mm Ø
Weight:
25 g
Note: The transmitter is conforming to the local regulations. Note the following points:
A)
Receivers may be blocked by radio signals occurring on or near their
operating frequencies, regardless of the code selected
B)
A receiver can only respond to one transmitted signal at a time
C)
Wireless equipment should be tested regularly (at least once a week)
to determine if there are sources of interference and to protect
against faults
5.3
Preparation for use
5.3.1
Installation of the battery
a)
Open the WT-211 transmitter with a small Phillips screwdriver by removing
the 4 screws. Afterwards open the cover gently.
b)
Remove the PCB carefully from the base of the housing.
c)
Place the 3V-Lithium battery in such a way, that it is secured by the contact
spring Observe the polarity, „+“ side has to be on top.
d)
Check the power of the battery by pressing the button in the centre of the
PCB. The LED must be lit to show a well-powered battery.
e)
Place the PCB back into the housing. Observe the position pin to bring the
PCB into the correct position.
5.3.2
Coding
The WT-211 is equipped with an 8-pole DIP-switch (Code switch from 1-
8) This switch is used to select the
code of the system. (see picture 4). Use a small screwdriver to select your code. ATTENTION: Do not use the
pre set code, as this one is only used to test the system. Do not use settings of placing all the switches on
position ON or OFF.
5.3.3
Assembling of the housing
Place the PCB into the main part, battery facing towards you. Observe the correct position given by the
positioning pin. Put the seal ring into the correct position and place the cover firmly. Tighten the 4 Phillips
screws gently.
5.4
Learn-in the wireless emergency button
The learn-in procedure is described in section 6.5.