Tone generator and amplifier probe – a solution for solar arrays

Traditional electrical test equipment like voltmeters are invaluable when testing solar module arrays, but also inadequate for identifying and mapping the layout of individual components in said system.

The emazys Z200 PVA and Z300 PVT feature a built-in tone generator and amplifier probe method, enabling the identification of disconnection faults and confirming the cables belonging to specific PV modules. Without such tools, these tasks can be time-consuming.

Both the Z200 PVA and Z300 PVT can emit specific frequencies into PV system terminals. Using the handheld tone generator, technicians can easily trace these frequencies along the component assembly, simplifying troubleshooting.

How it works

• The instrument (Z200/Z300) is connected to the string terminals.
• When the tone generator function is activated, the instrument transmits an AC voltage (sinusoidal) into the module string and the GND connection.
• The amplitude of the test signal is approximately ±1 Volt AC, with frequencies ranging from 800 to 1200 Hz.
• The tone pickup is a compact device that combines an antenna, amplifier, and small speaker, all powered by a 9V battery.
• The transmitted frequencies are detected by the antenna, amplified, and output as loud and clear “beep” tones, making them easy to work with. It is intuitive once you get started.

Typical use cases

Mapping PV Arrays: Use the test signal to trace long cable runs and ensure the cables correspond to a specific module string.

Tracing Disconnections: Move the amplifier pickup across the modules until the signal is lost; this indicates the location of the disconnection.

Post-Repair Testing: Use the tone generator to confirm that the repair was performed on the correct module string.