华仪6820交流变频电源，台湾华仪Extech 6820的技术特点：
6820 Linear AC Power Source 0-300V / 45 - 500Hz (2000VA)

输出容量 : 500VA - 4KVA

采用新型的线性 (Linear) 放大线路设计，低噪声、高稳定性

全范围可调输出电压及频率设定范围 (0 - 300V ; 45 - 500HZ)

使用先进的高密度电源技术设计，1KVA 容量高度只有 2U (8.9cm)

4 组大型绿色 LED 显示器，可同时显示输出频率、电压、电流、功率 / 功率因数量测数值

超强输出波峰因子比，于满电流的输出状态下可达 4 : 1

特殊的恒流装置，可轻易启动马达、压缩机等高启动电流之负载

选购远程遥控输入界面，可执行 Test / Reset 及 7 组记忆组 (M1 - M7) 快速输出

二段式温控风扇速度可降低使用噪音 
华仪6820交流变频电源，台湾华仪Extech 6820的技术参数：

6800系列交流变频电源(6805，6810，6820，6830，6840）

Model	6805	6810	6820	6830	6840
INPUT
Phase	1 phase
Voltage	115/230Vac ± 15%	230Vac ± 15%
Frequency	47-63Hz
OUTPUT
Max. Power	500VA	1000VA	2000VA	3000VA	4000VA
Max Current(r.m.s)	0-150V	4.2A	8.4A	16.8A	25.2A	33.6A
0-300V	2.1A	4.2A	8.4A	12.6A	16.8A
Max Current(r.m.s)
Opt. 0-600 V	0-300V	2.1A	4.2A	8.4A	12.6A	16.8A
0-600V	1.05A	2.1A	4.2A	6.3A	8.4A
Phase	1 phase / 2W
Total Harmonic Distortation (T.H.D)	<=0.5% at 45-500Hz (Resistive Load)
Crest Factor	>= 4
Line Regulation	±0.1V
Load Regulation	<=0.5% (Resistive Load)
Response Time	< 100µS
SETTING
Voltage	Range	0-150V / 0-300V Selectable or 
0-300V / 0-600V Selectable (Option 0 -600V)
Resolution	0.1V
Accuracy	±(0.5% of setting +2 counts)
Frequency	Range	45-500Hz
Resolution	0.1Hz at 45.0-99.9Hz , 1Hz at 100-500Hz
Accuracy	±0.02% of setting
Frequency
(Option 45Hz - 1KHz)	Range	45-1000Hz
Resolution	0.1Hz at 45.0-99.9Hz , 1Hz at 100-1000Hz
Accuracy	±0.02% of setting
MEASUREMENT
Frequency	Range	45.0Hz - 500.0Hz 
501.0Hz - 1000Hz (Opt.614)
Resolution	0.1Hz
Accuracy	±0.1Hz at 45.0 - 500.0Hz 
±0.5Hz at 501.0 - 1000Hz
Voltage	Range	0.0-300.0V / 0.0-600.0V
Resolution	0.1V
Accuracy	± (0.5% of reading +2 counts) for 0-300V
± (0.5% of reading +4 counts) for 0-600V
Current(r.m.s)	Range	L	0.000-3.500A
H	3.00-35.00A
Resolution	L	0.001A
H	0.01A
Accuracy	L	± (0.5% of reading +5 counts)
H	± (0.5% of reading + 3 counts)
Power	Range	L	0.0-350.0W
H	300-4000W
Resolution	L	0.1W
H	1W
Accuracy	L	± (0.6% of reading +5 counts)
H	± (0.6% of reading +2 counts)
Power Factor	Range	0.000-1.000
Resolution	W / VA ,Calculated and displayed to three significant digits
Accuracy
GENERAL
Low Range Meter
(for 6805/ 6810 Option)	Range : 2.0mA - 350.0mA / 0.20 - 35.00W
Resolution : 0.1mA / 0.01W 
Accuracy : ± (0.6% of reading +5 counts).
Remote Input Signal Interface
(Option)	Test, Reset, Recall memory 1 through 7
Remote Output Signal	Fail ,Test-in Process
Over Current Fold Back	On/Off , Setting On when output current over setting A-Hi value 
it will fold back output voltage to keep constant output current is setting A-Hi value.
Protection	OCP, OTP ,OVP and Alarm
Safety	TUV/GS pending
Dimension(W x H x D) mm	430 x 89 x 400,2U	430 x 89 x 560,2U	430 x 267 x 650,6U	430 x 667 x 650,15U	430 x 667 x 650,15U
Net Weight	25Kg	36Kg	90Kg	165Kg	192Kg
Operation Environment	0-40°C / 20-80%RH