Trace Engineering DR Series Owner’s Manual - Version 3.2 - 9/7/98 - Page 39
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.
Computer Printers- Trace has found that Hewlett-Packard Inkjet printers work well from the
modified square waveform.
Electronics- AM radios will pick up noise, especially on the lower half 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.
Cell Phones- Some cellular telephone users have reported interference from modified square wave
inverters. This interference is sometimes in the form of a clicking sound.
Low Battery Dropout - The inverter will turn off to protect itself if your battery bank cannot deliver the
necessary amperage to drive a particular load without falling below the low voltage protection point for
three seconds. With the inverter off, the battery voltage will rise and then it will resume operation.
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