Samlex America SAM-100-12 - Manuel (Page 7)

6 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 7
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cautIon!
certain devices (few examples given below) may malfunction when powered from
modified Sine Wave. check with the manufacturer of the device for suitability of
powering with modified Sine Wave:
• Devices utilizing zero voltage crossing for timing control: Some clocks used in con-
sumer electronic items (will not keep accurate time)
• Devices using modulation of RF signals on AC lines during zero crossing e.g. X-10
System for Home Automation
• Devices utilizing Triac based phase control for transformer less voltage step down
e.g.:
• Small battery chargers for hand tools, flashlights, night-lights, shavers etc.
• Variable motor speed control in hand tools
• Light dimmers
• Temperature controllers e.g. Temperature Controlled Electric Blankets
• Devices using high capacitance based voltage multipliers for generating high
voltage (will create very high surge currents) e.g.:
• Photographic Strobe Lights
• Laser Printers
measuring modified Sine-Wave voltage with a “true rmS” voltmeter
As mentioned above, Modified Sine Wave voltage is a type of square wave that has an
rMS (root Mean Square) value of 115 VAC in this inverter. A general-purpose AC voltme-
ter is calibrated to accurately measure the rMS value of a Pure Sine Wave and NoT of a
Modified Sine Wave. If this general-purpose voltmeter is used to measure Modified Sine
Wave voltage, it will indicate a lower value (96 VAC to 104 VAC). For accurately measuring
the voltage of a Modified Sine Wave, use a voltmeter which is designed to measure “True
RMS Values” like Fluke 87, Fluke 8060A, Fluke 77 / 99, Beckman 4410 etc.
seCtIOn 2 | Introduction