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上海市日用五金工业研究所研制成功了一种新型直流电计量仪表——DC-AH 型数字式直流安时计。它能够精确地自动累计直流电路里所通过的电量,以“安培·小时”为计量单位。被测电路的电流范围为数毫安～数千安,不受电流波形的限制,测量精度达2%,且备有定电量自动输出信号,可驱动外部设备动作,从而可作为自动控制仪表使用。该仪表属于便携型台式仪表,也可作为表盘式仪表使用,有五位数字显示,并
Shanghai Daily Hardware Industry Institute successfully developed a new type of DC measuring instruments - DC-AH digital DC ammeter. It accurately and automatically accumulates the amount of power passed through the DC circuit, measured in ampere hours. The current range of the circuit under test is several milliamps to thousands of Amps. It is not limited by the current waveform, and the measurement accuracy is up to 2%. The automatic output signal with constant power supply can drive the external equipment to operate and can be used as an automatic control instrument. The instrument is portable desktop meter, but also can be used as a dial gauge, a five-digit display, and