LEGRAND 4 131 05, Инструкция по установке и эксплуатации

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18
settIng the antennae
Due to the low power level radiated by the wristband transmitters setting the sensitivity level of the antenna must be
carried out under conditions that are as close as possible to normal system usage.
Proceed as follows in order to set the antenna:
• Set the thumbwheel SW1 to 8, which corresponds to medium sensitivity for the receiver.
• Set the antenna to test mode by placing the configurator ST2 to 2-3
• Fit a wristband in exactly the manner as is worn by the residents (for example, on your right wrist)
• Remove all other wristbands from the system in order to prevent any interference. Place them in standby mode
or put them in a metal box or enclosure.
• Adjust the sensitivity of the antenna using the thumbwheel SW1 so that you will be detected once inside the
desired area. The detection and reception level in relation to the threshold defined by SW1 are indicated by the
antenna indicator lights flashing (see below). Make allowance for a safety margin in order to ensure detection
even if a wristband's radio range is altered (if an unusual obstacle is present for example).
The value 0 corresponds to the receiver's minimum sensitivity level, i.e. the transmitter must be very close
in order to be detected (in the order of a few centimetres). The higher the thumbwheel value the greater the
detection distance. The value F corresponds to the acknowledgement of any signal received that is correctly
decoded.
• Exit the test mode by resetting the configurator ST2 to position 1-2
• Perform one or more trigger tests in normal mode
Illuminated signals in test mode.
• Green indicator light DS4
- On continuously: Awaiting reception
- Off for 200 ms: Receiving wristband
• Red indicator light DS2
- Off: No reception or level below that determined by SW1
- 100 ms pulse: Reception with a level slightly higher than the threshold determined by SW1
- Two 100 ms pulses: Reception with a level much higher than the threshold determined by SW1
Green
indicator light
Red indicator
light
Switch to
test mode
Detection threshold
Switch to
normal mode
Wristband
reception level
Recommended
detection zone
Commissioning (continued)
It is advisable to mark out the detection zone on the ground.