10. OUTPUT VOLTAGE AND WAVE FORM
The output voltage waveform of the inverter is called "quasi sine wave" or "modified
sine wave", it is a step waveform similar like household alternating current , this type of
waveform is applicable to most of the load, including linear or switching power supply,
transformer, electric motor etc..
Since the output voltage waveform of the inverter is different from AC, RMS with
general analog or digital multimeter can not accurately measure the output of the
inverter, please use the true RMS digital multimeter to measure, such as FLUKE
177/179 multimeter
Note:
Modified sine wave inverters are not suitable for all electrical appliances. As far
as we know, unusable appliances include induction cookers and some air-conditioning
fans with capacitance voltage-reducing circuits.
11. WORKING INDICATORS
When the inverter works, the LCD displays the current battery power, input voltage and
output voltage. When the inverter is in the protection, the LCD displays the warning
sign and the current protective state, as follows:
1) When the digital tube shows "LO", it indicates that it is currently under-voltage
protection.
2). When the digital tube shows "HI", it indicates that it is in the state of over-voltage
protection.
3). When the digital tube shows "OL", it indicates that it is in the state of output overload or
short circuit protection.
4). When the digital tube shows "OH", it indicates that it is in the state of overheating
protection.
8.
9.
12. PROTECTION FEATURES
1) Input under-voltage alarm: When the input DC voltage is lower than 9.8V/19.6V, the
buzzer will whistle intermittently to remind that the inverter will go into the under
voltage protection. Pay attention to save the data if you are using computer.
2) Under voltage protection: The inverter will automatically shut down when the input DC
voltage is lower than 9.5V/19V.The buzzer will whistle continuously, and LCD shows
LO
, Please turn off the inverter and use it after recharging the battery.
3) Over voltage protection: The inverter will automatically shut down when the input DC
voltage is higher than 16V/32V.The buzzer will whistle continuously and LCD shows
HI
. Please turn off the inverter and adjust the input voltage to the admissible range.
4) Overload protection: The inverter will automatically shut down when the load is higher
than the rated power. The buzzer will whistle continuously and LCD shows
OL
.
Turn off the inverter and resume to normal operation after taking away the excessive
load.
5) Short-circuit protection: The AC output will be automatically shut down when short
circuited and LCD shows OL
. It will automatically reset after the problem is solved.
6) Thermal protection: The unit will get bot during operation. If the temperature is higher
than 149
F, the inverter will automatically shut down. Then the buzzer will whistle
continuously and LCD shows OH
. Please turn off the inverter, and continue using it
after the temperature goes back to normal naturally. Meanwhile find out the factors
causing the fault, such as ventilation, ambient temperature, vent, load power and so on.
It can avoid similar things from happening again.
12 8
120
SINE WAVE
115V/230V A C
MODIFIED
SINE WAVE
115V/230V A C
Modified Sine Wave and Sine Wave Comparison
Power Inverter With
Remote Controller