PLA DL210NET Digi-Loop™ DSP Induction Loop Amplifier
11
Single Perimeter Loop Configuration using front LCD (Dual Loop Mode)
1. Define the area needed for the loop layout.
2. DC resistance of the loop and lead wire should be between .5 and 1.5 Ohms.
3. Connect loop wire to the DL210 Phoenix connector and insert to Loop Output A.
4. Connect all inputs to be used into the DL210.
5. Turn the power on.
6. Rotate the menu knob clockwise and go to the configuration menu. Push knob in (click) to enter and select output configuration.
Turn the rotary selector to Loop A. Scroll to set-up, click and select loop mode. Select dual loop and click to store setting.
7. Going back to the Configuration Menu, select System Configuration page in the menu and select tech tools, then select calibrate.
Scroll down to the frequency, click and select 1 kHz.
8. With the field strength meter set appropriately, measure the field strength at the mid-point of the loop. Adjust the volume (one step
down in the calibrate page) until the field strength measures 0dB (400m/A) in the center of the looped area.
9. This field strength setting should be 3dB at any point within the loop area to meet the IEC 60118-4 standard.
10. Back out of calibrate/system configuration menu. The input to the amplifier should now be adjusted to an acceptable input level.
To meet the
IEC 60118 Standard
:
Field strength: 400mA/m peak response at 1kHz (Calibration Point)
Frequency response: 100 - 5000Hz ±3dB relative to 1kHz Calibration Point (achieved through Equalization)
Note: The lead length from the amplifier to the loop should be kept as short as possible.
Note: The amplifier must be calibrated to the loop before adjusting the Output Effects.
Figure E: Single Loop Concept
A492
Perimeter Loop
Single Array
Phased Array (Low Overspill)
Ultra Low Overspill
Cancellation Loop
Master Loop
Slave Loop
Master Loop + Slave Loop = Phased Array
Cancellation
Loop
Main
Loop
Limits overspill
in this direction
Tighter loop elements = more spill control
Loop Amplifier
Loop Amplifier
Loop Amplifier
Loop Amplifier