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VEC411_Manual_032706
4/20/06
The modified sine wave produced by this inverter has an RMS (root mean square) voltage of 115
volts, which is the same as standard household power. Most AC voltmeters (both digital and analog)
are sensitive to the average value of the waveform rather than the RMS value. They are calibrated
for RMS voltage under the assumption that the waveform measured will be a pure sine wave. These
meters will not correctly read the RMS voltage of a modified sine wave. Non-TRUE RMS meters will
read about 20 to 30 volts low when measuring the output of this inverter. For accurate
measurement of the output voltage of this unit, use a TRUE RMS reading voltmeter such as a Fluke
179, Fluke 79 III, Beckman 4410, or Triplett 4200.
115 volt AC Output
CARE AND MAINTENANCE
Storage
1. Ideal storage temperature range is 50-68°F (10-20°C).
2. Store and use the inverter in a cool, dry place with adequate ventilation.
3. Avoid locations that are exposed to heating units, radiators, direct sunlight, or excessive
humidity or dampness.
TROUBLESHOOTING
Common Audio/Visual Problems
Problem: Buzzing Sound In Audio Systems
Some inexpensive stereo systems and boom boxes make a buzzing sound when operated from the
inverter, because the power supply in the electronic device does not properly filter the modified
sine wave produced by the inverter. The only solution to this problem is to use a sound system that
has a higher quality power supply.
Problem: Television Interference
The inverter is shielded to minimize interference with TV signals. However, in some instances, some
interference may still be visible, especially when the TV signal is weak. Try the following to improve
the picture:
1. Move the inverter as far away as possible from the TV set, the antenna and the antenna cables.
Use a short AC extension cord, if necessary.
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2. Adjust the orientation of the antenna cables and the TV power cord to minimize interference.
3. Make sure the antenna feeding the TV provides an adequate (snow free) signal and that high
quality, shielded antenna cable is used.
Common Power Output Problems
Possible Causes
Battery voltage
below 10 volts
Equipment being operated
draws too much power
Inverter in thermal
shutdown condition
Inverter is overloaded
SPECIFICATIONS
Power :
AC Output:
DC Input:
Fuse:
Waveform:
Recommendations
Recharge battery or check
DC power supply.
Reduce load to maximum 100 watts.
Allow inverter to cool down. Ensure there is
adequate ventilation around unit, and load is
no more than 100 watts for continuous operation.
Reduce load to 100 watts max.
to maintain regulation.
100 watts
115 volts, 60 Hz
13.8 volts
10 amps
Modified Sine Wave
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