DL107, DL207 and DL210 2.0 Digi-Loop™ DSP Induction Loop Amplifiers
17
6. If the symbol turned GREEN, the PC App is ready to use
.
Note: If both channels aren’t terminated with at least 0.5 ohms, the amplifier icon in the PC App may not turn green when trying to connect. If this
happens you will need to fix the problem, disconnect the USB cord between the amplifier and computer, reboot the amplifier, reconnect the USB
Cord and try to connect again.
If the PC App has detected a fault, such as Loop B not being terminated with at lest 0.5 ohms, even when the amp is terminated and rebooted
the PC App will still indicate “Loop B: Error” even though the amplifier does not indicate this fault. If this happens, perform a loop test from the
toolbar to clear this condition. If the PC App still indicates “Loop B: Error” the PC App will need to be closed and re-opened to pull the new state
information from the amplifier.
5. Calibrating & commissioning the loop amplifier
The loop amplifier must be calibrated to the field strength of the loop or the VU Meters and settings adjustments
will not be accurate.
An external source (such as a test tone generator) CANNOT BE USED to calibrate the amplifier. The internal test
tone generator MUST be used.
Calibration and commissioning are necessary to meet IEC Spec 60118-4.
Equipment required:
Field Strength Meter, USB cable (or crossover ethernet cable), and windows-based PC.
Requirements:
•
a Background Noise Check was performed with a field strength meter
•
a Test Loop was verified with the amplifier connected
•
the permanent loop wire(s) measure 0.5-3.0 ohms (including lead wires)
•
the latest firmware is loaded in the amplifer
•
the latest PC App is installed on the PC
1. Start communication between the PC App and Amplifier.
Refer to “USB Control Setup” for this example.
2. Load preset factory defaults for Loop type.
This clears previous settings and loads preconfigured factory settings for the loop type. The loop type is either a Single Loop, Dual Loop or
Phased Array. The DL210 models offer a “S Loop” preset and this is used for a single loop. DL107/207 models have a “Single Loop”
preset.
