怎么创造一台分压器｜How do I create a voltage divider
For input voltage to the data logger greater than 2.5 volts DC, you will need to make a voltage divider. A voltage divider will drop the voltage of the input signal to the level the data logger can measure. First determine the needed attenuation ratio; divide the input volts by the output volts to the data logger:
A = input volts/2.5
If the maximum signal is 5 volts DC, and you wish to use the HOBO's full scale range of 2.5 volts DC, the attenuation is 2:1, or just 2. Once you have determined the attenuation (A), you can calculate for the Resistor (R1). For now, pick a value for R2 (typically 10k), then calculate for R1.
R1 = (A - 1) *R2
From the above example A = 2 and, if you picked a value of 10,000 for
R2: R1 = (2 - 1) *10,000
R1 = 10,000 ohms
Therefore, R1 and R2 are both 10K resistors.
There are a few practical considerations. If the sum of R1 and R2 is too low (Rmin), you could overload your input source or heat up the resistors. If the sum of R1 and R2 is too high (Rmax), it could be a poor match for our volt data logger's 10K input impedence. Also, resistors do not come in every possible resistance value. You will have to plug in available resistance values until you reach a voltage divider that is both accurate enough and keeps the sum of R1 and R2 within practical limits.电阻测试仪| 电阻计| 电表| 钳表| 高斯计| 电磁场测试仪| 电源供应器| 电能质量分析仪| 多功能测试仪|
翻译：为输入电压到数据列表大于2.5伏特DC，您将需要做分压器。 分压器将下降输入信号的电压到数据列表可能测量的水平。 首先确定需要的衰减比率; 由产品伏特划分输入伏特到数据列表：
A =输入的volts/2.5
如果最大信号是5伏特DC，并且您希望使用2.5 HOBO伏特的‘s充分的标度范围DC，衰减是2:1或者2。 一旦您确定了衰减(a)，您能为电阻器(R1)计算。 暂时，采摘价值为R2 (典型地10k)，然后为R1计算。
R1 = (A - 1) *R2
从上述例子A = 2和，如果您采摘了值为10,000为
R2 ： R1 = (2 - 1) *10,000
R1 = 10,000欧姆
所以， R1和R2是两个10K电阻器。
有几实用考虑。 如果R1和R2的总和是太低的(Rmin)，您可能超载您的输入源或加热电阻器。 如果R1和R2的总和太高(Rmax)，它可能是一位恶劣的问题对于我们的伏特数据列表的10K输入阻抗。 并且，电阻器不进来每可能的抵抗价值。 您将必须塞住可利用的抵抗价值，直到您到达是足够准确的并且保留R1和R2的总和在实用极限内的分压器。
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