Page 16 - Benning PV2 Manual

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Mode b: “ curve symbol” on the LC display

Measurement of...
- Vo/c (open-circuit voltage)
- Is/c (short-circuit current)
- I-V characteristic (Vmpp, Impp, FF)

Mode c: “RISO - - - - MΩ” and
“ curve symbol” on the LC display
Measurement of...
- Vo/c (open-circuit voltage)
- Is/c (short-circuit current)
- I-V characteristic (Vmpp, Impp, FF)
- R ISO (insulating resistance)

Mode d : “Current clamp symbol” on the LC display
Measurement of...
- AC/DC operating current via BENNING CC 3

- Press the Auto -key 3 to start the selected test procedure (mode).
- If an I-V curve measurement (modes b + c) has been selected, a progress bar and a flash-
ing curve symbol Q are displayed on the LC display during measurement. If a change
of the insolation of more than 5 % is detected during measurement, the 5% symbol is flash-
ing on the LC display.
- As soon as the measurement is completed, the curve symbol is displayed permanently
and the open-circuit voltage Vo/c as well as the short-circuit current Is/c are displayed on the
LC display.

I-V curve measurement is running.
Curve symbol is displayed, progress bar is running

I-V curve measurement is completed.
Curve symbol , open-circuit voltage Vo/c and short-
circuit current Is/c are displayed

- The shape of the displayed curve symbol gives information about the measured value of the
filling factor and thus indicates a possible problem regarding the PV generator.
Filling factor (FF) = (Umpp x Impp) / (Uo/c x Is/c)
Curve symbol : Filling factor > 60 (> 0.60)
Curve symbol : Filling factor < 60 (< 0.60)
- Press the 1 key K to display the voltage (V = Umpp) and the current (I = Impp) at the
maximum power point (MPP) as well as the filling factor (FF).
- The measured values will be shown on the display 1 for approx. 20 seconds or until a key
is pressed.
- If the measured insulating resistance is higher than the preset limiting values, the sym-
bol will be displayed next to the insulating resistance value. If the insulating resistance value
is lower than the limiting values, the symbol will be displayed.
- Press the -key L to store the measured value to the next storage location available.
See figure 6: Automatic solar panel measurement, ISO measurement via earthing conductor

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