Schumacher Power Inverter PID-410 - Manual (Page 9)

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To calculate the continuous load: Continuous Load = AMPS x 120 (AC Voltage).
Always run a test to establish whether the inverter will operate a
particular piece of equipment or device. In the event of a power overload, the inverter
is designed to automatically shut down. This safety feature prevents damaging the
inverter while testing devices and equipment within the wattage range of the inverter.
If a device does not operate properly when first connected to the inverter, turn the
inverter ON (I), OFF (O), and ON (I) again in quick succession. If this procedure is
not successful, it is likely that the inverter does not have the required capacity to
operate the device in question.
This inverter is designed to power 100 watt devices or less when
used with the vehicle 12 volt accessory port. To use the full output you must use the
battery clips adapter and connect the inverter directly to the battery.
NOTE: The 100 watt limit is to accommodate the fuse ratings for all vehicles. Some
vehicles may allow the full output. If the fuse blows when you switch on the device
you are trying to use, you have to either use a smaller device or you must purchase
the 12 volt accessory outlet to battery clips adapter (Schumacher Model SAC-103)
and connect the inverter directly to the battery.
This inverter uses a nonsinusoidal waveform. Therefore we do not
recommend you use it to power the following devices:
Switch Mode Power Supplies; 1.
Linear Power Supplies; 2.
Class 2 Transformers; 3.
Line Filter Capacitors; 4.
Shaded Pole Motors; 5.
Fan Motors; 6.
Microwave Ovens; 7.
Fluorescent and High Intensity Lamps (with a Ballast); and 8.
Transformerless Battery Chargers. 9.
Doing so, may cause the device to run warmer or overheat.