If measurements are performed by devices with digital boards, then readings can be taken without any problems. If scales are applied on measuring devices, then precisely to measure size, it is necessary to know the price of division of the device. Sometimes it is specified on a scale if it is not there, calculate it independently.
It is required to you
- - devices with various scales.
Instruction
1. Attentively examine a scale of the analog device which performs measurement. On it units of measure with which this device works are put. On any scale numerical values of the measured size between which there are divisions without quantitative indices are caused. The size concluded between them is the smallest which can be measured by means of the device. The price of division of the device is the smallest size which can be measured by the device with this scale. This smallest price is concluded in the smallest division of a scale of the device.
2. On a scale find two next digital values. At the same time their order is not important at all. For example, if on a measured cylinder by means of which it is possible to measure liquid volume in ml numerical values 0, 100, 200, 300, 400, 500 are caused, then it is possible to take couples of numbers 0 and 100, 100 and 200 or 400 and 500 or any other couple of numbers by such principle. Take away smaller from bigger numerical value.
3. Count divisions between the next numerical values on a scale. At calculation consider that division is called the distance between two next lines of a scale, but not these lines. Calculate the price of division of the device, having divided the difference of two next numerical values of a scale into the number of divisions between them. It will also be the minimum size measured by the device.
4. For example, to find the price of division of a scale of the voltmeter which measures tension in volts with numbers 0, 2, 4, 6, 8 and five divisions between two next numerical values, do a certain sequence of actions. Take two next numerical values - let it will be 4 and 6. Now from bigger number take away smaller - 2 will turn out. Divide this number into the number of divisions between these values (on a condition it equally to 5). 2/5=0.4 volts will turn out. The price of division of the voltmeter is equal to 0.4 V.