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UA78A是新一代3 1/2位大屏幕液晶显示数字万用表。可用于测量交、直流电压、交、直流电流、电阻、电容、温度、晶体三极管放大倍数、二极管正向压降及通断蜂鸣。具有数据保持、自动关机、低电压显示等功能。
UA78A 3 1/2位数字万用表技术指标 |
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UA78A 3 1/2Bit Digitsl Multimeter Technological Parameter |
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Basic function | 量程 range | 精度 basic precision |
UA78A(UA890D) | ||
Voltage Direct Current | 200mV/2V/20V/200V/1000V | ?(0.5% 1) |
Voltage Alternating Current | 2V/20V/200V750V | ?(0.8% 3) |
20V/200V750V | ||
Dirict current | 20uA/2mA/200mA/20A | ?(0.8% 1) |
2mA/200mA/20A | ||
Alternating current | 2mA/200mA/20A | ?(1% 3) |
200mA/20A | ||
Resistance | 200Ω/2KΩ/20KΩ/200KΩ/2MΩ/20MΩ | ?(0.8% 1) |
200Ω/2KΩ/20KΩ/200KΩ/2MΩ/200MΩ | ||
Capacitance | 20nF/2uF/200uF | |
20nF/200nF/20uF/200uF | ?(4% 3) | |
Temperature | -40℃-1000℃ | |
Special function | ||
Diode test | √ | |
Audion test | √ | |
Onoff warning | √ | |
Low voitage display | √ | |
Data hold | √ | |
Auto power off | √ | |
Functional protection | √ | |
Self-recovered safety | √ | |
Shake-proof protection | √ | |
Input impendance | 10MΩ | √ |
Apheliotropism | ||
Sampling audio sounding | 40-400Hz | |
Operating mode | Manual range | |
Maximum display | 1999 | |
Display size | 66?39mm | √ |
Power supply | 9V(6F22) | √ |