Velleman PI600BN - Manual (Page 7)

PI600W // 12V & 24V VELLEMAN 6
9. MEASURING AC VOLTAGES
The output wave of the AC inverter is a MODIFIED SINEWAVE. An AUTHENTIC
RMS VOLT METER is required to measure the AC output voltage. Using any
other type of voltage measuring device will result in an AC voltage reading that is
up to 20 to 30V lower than the rated value. Only an authentic RMS voltmeter
provides an accurate reading.
10. VENTILATION
IMPORTANT ! Make sure the fan keeps revolving while the device is in use.
Check for failures if the fan does not work while the inverter is being used.
Make sure the fan is not blocked in order to avoid poor ventilation.
BAD
GOOD