Model Number
HZ
-WT-ADV-24 User Guide
Page | 11
©
2021
Hangzhou Weiqi Electronic Co., Ltd.
All rights reserved.
Small Metallic Objects The minimum distance from small metallic objects shall be at least 4
inches (10cm) away from the WTMD in order to detect large metal
items. This will have little effect on the sensitivity but could make the
WTMD more susceptible to false alarms.
Large Metal Objects or
Strong Magnetic Field
The minimum distance from large metal objects (or strong magnetic
fields) shall be a minimum of 6 feet (2 meters).
Ground
The ground should be flat with a solid support to prevent vibration.
This is especially important when there is a presence of vibration of
the metal structure under the surface as this may cause unnecessary
false alarms when people walk through the detector.
Moving Metal Objects Moving metal objects outside of the WTMD should be kept a distance
of 20” to 79” (0.5m-2m) away from the opening to avoid false alarms.
Based on the size of the metal objects, the distance needed between
the metal objects and the WTMD may be different.
Surge Protection
Provide adequate surge protection to the WTMD.
Electrical Interference The distance between the electronic interference source and the
receiving coil should be the greatest. The recommended minimum
distance should be 20” to 79” (0.5m-2m). However, the actual range
will depend on actual conditions. For example, you can move the
WTMD and the interference source to find the best position.
Interference can be caused by an electronic control panel, radios and
computers, image displays, high-power motors and transformers, AC
cords, control circuits, flash welding equipment, fluorescent tubes,
and other equipment.
When installing the unit, place the receiving coil (Rx) as far away from
the interference source as practical.
The distances shown are the recommended distances. The actual
distances will be determined based on the installation site conditions.
Electrical interference sources: 4” (0.1m)
Moving metal objects: 20” to 79” (0.5m to 2m)
Fixed metal objects: 20” to 157” (0.5m to 4m)
The distance above is a recommended distance, the actual distance
to be decided upon installation conditions.
When installing the unit, position the unit so that the receiving coil
(Rx) is farther away from the interference source than the transmit
panel.
The distance between WTMD and interference sources is sufficient if,
when the device is ready, the indicator in the display area shows no
more than 1-2 bars.