Visonic Inc. 5-BTC00433 ユーザーズマニュアル

Infant Protection Bracelet

 

 

 

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The Elpas Infant Protection Bracelet from Visonic Technologies (VT) is a rechargeable 
miniature, unified active long-range Radio Frequency (RFID) and Infrared device. The 
bracelet provides 24/7 infant protection by tracking the real-time location of newborns in 
maternity wards and by generating mother-baby mismatch alarms. 

The Infant Protection Bracelet is comprised of a 
rechargeable tag and a disposable, anti-tamper, 
adjustable band made of skin-safe non-latex 
materials that can be retightened should the baby 
loose weight. When worn by the newborn, the 
bracelet automatically transmits removal alert 
notifications for keeping facility personnel informed 
of deliberate or accidental tampering and/or removal 
of the baby from the protected area. 

The bracelet’s all-in-one, dual technology transmitter 
continuously emits low power, beacon type radio 
frequency (RF) messages as well as safe, supplemental infra-red (IR) messages that 
identifies the exact real-time location of the new born infant This same RF/IR technologies 
also continuously broadcasts the operational status of the tag (such as whether the tag is 
moving or at rest, it’s battery state and the condition of its tamper wire). The bracelet's 
onboard magnetic low frequency (LF) receiver adds chokepoint area detection so whenever 
the new born infant nears a prohibited exit/entrance covered by an Elpas LF Exciter a 
security intervention alarm is raised. 

Made of tough ABS thermoplastic, the Elpas Infant Protection Bracelet is shower and bath 
proof as well as temperature stable. Small in size and weight (39.4mm long, 31.5mm wide 
and 14.8mm thick) is rechargeable and includes LED visual indicators that illuminate 
whenever the bracelet transmits and/or when a low battery condition exists. 

 

 

 
 
 
 
 

 Single burst of 4 IR/RF transmissions (each lasting @ 2ms) and the total burst time 

not exceeding 1 second. 

 

 Onboard LF receiver activates every 0.6 seconds to check if the tag is in a LF zone. 

 Continuous bursts of 4 messages (each lasting @ 2ms), with intervals of 400ms.  

 IR/RF Data Message includes ID code of LF Exciter. 

 Onboard LF receiver activates every 15 seconds to check if the tag is in a LF zone. 

: Continuous bursts of 4 messages (each lasting @ 2ms),  

with intervals of 400ms. 

: IR/RF Data Message includes ID code of LF Exciter. 

Attaining the maximum IR reception range depends mainly on direct line of sight between the transmitter 

and the receiver. Nevertheless, certain environments allow the signal to reach the receiver in a roundabout 

path, by reflection or refraction of the infrared radiation. Tiled floors (uncarpeted), walls, smooth ceilings 

(not too high) can reflect IR signals reasonably well, and allowing them to be received even when the 

radiating source is pointed away from the receiver. With good indirect reflection path, a range of 5 - 6m 

(15 - 18ft) is expected (with poor reflection, the range gets even shorter). The user is therefore strongly 

advised to point the transmitter directly at the nearest receiver or, if the location of the nearest receiver is 

unknown, to press the transmit button several times while pointing the transmitter in different directions. 

It is strongly recommended not install IR receiver outdoors, facing direct sunlight, or near fluorescent 

lamps, to prevent interference to IR reception.  

 

The installer is encouraged to test the reception range in the various zones and to install additional 
receivers if necessary. 

Some limitations have to be considered.  

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.