保护电路应当做遮光屏蔽，且屏蔽要接到安培计的低压端。
The protection circuit should be enclosed in a light-tight shield. the shield should be connected to the low of the ammeter.
如果元件或材料发生击穿，全部电压都会加到安培计的输入端，从而可能将其损坏。
If the component or material breaks down, all the voltage would be applied to the ammeter's input, possibly destroying it.
DUT的源电阻会影响反馈安培计的噪声性能。源电阻降低，安培计的噪声增益就增加。
The source resistance of the DUT will affect the noise performance of a feedback ammeter. As the source resistance is reduced, the noise gain of the ammeter will increase.
这种电流的降低是由安培计的内阻（RM）引起的，此内阻产生了一个附加的电压降，称为输入端压降（VB）。
This reduction is caused by the internal resistance (RM), which creates an additional voltage drop called the voltage burden (VB).
然而，实际的安培计在输入端开路时的确有一些小的电流。
Practical ammeters, however, do have some small current that flows when the input is open.
使用分流型安培计(图2 -49)时，输入电容对电流测量的影响与电压测量时类似。
The effects of input capacitance on current measurements using a shunt type ammeter (Figure 2-49) are similar to those for voltage measurements.
为了了解源电容如何影响噪声增益，再来看一下图2-15中的简化的安培计模型。
To see how changes in source capacitance can affect noise gain, let's again refer to the simplified ammeter model in Figure 2-15.
表2-3给出了典型的反馈安培计在各种测量范围内最小的源电阻推荐值。
Table 2-3 summarizes minimum recommended source resistance values for various measurement ranges for a typical feedback ammeter.
由于安培计上的电压降可以忽略，所以所有的测试电压都出现在电阻R上。
Since the voltage drop across the ammeter is negligible, essentially all the test voltage appears across R.
有两种电流测量的基本技术，即分流安培计技术和反馈安培计技术。
There are two basic techniques for making current measurements: these are the shunt ammeter and the feedback ammeter techniques.
多数情况下，安培计或皮安计是用于测量电流的。
In most cases, an ammeter or picoammeter is used to measure current.
因此，它只用于校准更实用的测量电流的仪表——安培计。
So it is used instead to calibrate more practical current - measuring instrument, called ammeters.
为此，可在电机控制器上附加指示负载电流的安培计，这是一种简单而实用的方法用以指示达到最大负载。
Therefore, additional instructions load current ammeter in the motor controller, which is a simple and practical method for indicating the maximum load.
由于静电计、安培计或皮安计的输入端压降小于1mV，这两个二极管不会导通。
Since the voltage burden of the electrometer ammeter or picoammeter is less than 1mV, the diodes won't conduct.
主要结构有：电磁铁和恒流电源、数字式高斯计(霍尔效应)、安培计和伏特计、配有照明系统的控制盘。
The main structure have: Electromagnet and Heng galvanism source, numerical type Gauss account (the effect of Huo er) and ammeter and volt account, have control dish of illuminate the system.
安培计可以用电阻为零的理想安培计(IM)和电阻(RM)相串联来表示，如图2 -23所示。
An ammeter may be represented by an ideal ammeter (IM) with zero internal resistance, in series with a resistance (RM), as shown in Figure 2-23.
两(2)秒，以安培计测得的输出，将进行放电。
The discharge will be conducted for two (2) seconds and the output measured in amperes.
两(2)秒，以安培计测得的输出，将进行放电。
The discharge will be conducted for two (2) seconds and the output measured in amperes.
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