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Dimmer switches- Most dimmer switches lose their ability to dim the lights and operate either fully
on or off. Trace has had reports of success with the 600 watt, 120 VAC Leviton slide dimmer
switches (Leviton P/N-6621). These have been reported as working reliably every time with a
modified square wave output inverter.
Rechargeable devices- Sears “First Alert” ™ flashlights fail when charged by the inverter. “Skil” ™
rechargeable products are questionable. “Makita”™ products work well. When first using a
rechargeable device, monitor its temperature for 10 minutes to ensure that it does not become
abnormally hot. That will be your indicator that it should not be used with the inverter. Trace has
found that “Black & Decker”™ Dustbusters and Spotlighters work well.
Laser printers- While many laser products are presently operating from Trace Engineering inverters,
and we have personally run a Texas Instruments Microlaser and HP IIP, we have had reports of an
HP III and a MacIntosh Laser Writer failing under inverter power. We, therefore, do not recommend
the use of laser printers. Hewlett Packard ink jet printers seem to work well with modified square
wave inverters. Should you wish to try and run your own laser printer, do so at your own risk. The
manufacturer will probably not honor the warranty if they figure out it failed under any power source
other than public power.
Electronics- AM radios will pick up noise, especially on the lower portion of their band. Inexpensive
tape recorders are likely to pick up a buzz. Large loads should not be started while a computer is
operating off the inverter. If a load is large enough to require “soft starting” it will “crash” the
computer, causing it to “reboot”.
Computers - Computers may 'crash' if large loads are started while the inverter is operating. The
inverter output voltage may fall briefly, allowing computers to fall. Large motors may generate
voltage spikes that are not completely suppressed by the inverter's internal voltage transient
suppression circuit. Surge arrestors and similar devices design to guard computers from voltage
spikes or fluctuations will not work correctly with the inverter's output waveform. Don't use them.
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