Instruction

1

To determine the scale division value is not enough to see only the bare layout without any signs. Need to know what the value of measure scale. You can determine the amount of gold by the bushel for grain, but the result of such a measurement would be very approximate. Scales and measuring devices tagged values, to determine which uses this device. For example, the V appears on the voltmeter. The inscription t◦C means that before you thermometer with Celsius.

2

In addition to the measured value, it is necessary to know the units of this value. Of course, the visual difference between a centimeter from inch is easy to get lost in the units on a conventional drawing the line is impossible. But without any special markings you don't recognize that the device in front of you — ammeter or milliammeter. And confusion with electrical devices-prone circuit.

3

You must know the limits of the measured value. Outdoor thermometer is able to measure negative temperatures, a bath thermometer is designed to measure a narrow range of temperatures within a few degrees of temperature of the human body.

4

In different cases require different accuracy of measurements of the same quantity. Street thermometer determines the temperature with a precision of a whole degree, a medical thermometer capable of monitoring changes in body temperature accurate to a tenth of a degree.

5

To determine the price of division of the marked scale, first determine the quantitative value signed between the two marks as a difference between two adjacent numbers. For example, for a training range of the difference between any two numbers - one centimeter. And the speedometer difference between the figures may be ten kilometers per hour.

6

Count the number of divisions within the boundaries of the selected plot scale. Divide the numerical value of the interval the number of intervals between minor divisions. If the line between the two numbers, ten small divisions, the price of one such division will be equal to one tenth of a centimeter, or one millimeter. If the speedometer between the two numbers with a difference of ten miles per hour only one division, the gap should be divided in half. The price of division - five kilometers per hour.

7

Thus, the scale value may be equal to the unit of measurement on this scale or to contain multiple units. And it is possible to scale in fractions of a unit.

# Advice 2: How to determine the price of division

Any measurement device itself is not very useful. You need the ability to use it. This should learn to determine

**the price****of division**of the measuring device, i.e., the smallest dash of his markings.Instruction

1

Grab a measuring device (for example,a school ruler), examine it carefully. You'll see

**division**- some more, others less. Division can be of different colors, some of them signed. At a school meeting, for example, a signed first division - one centimeter.2

Make a note the period before the first signed

**division**. Count the number of small divisions in this segment (for example, at a school meeting in the interval, equal to one centimeter is ten small divisions and two additional**dividing**average value).3

Determine

**the price**of the smallest**division**. To do this, divide the signed value of the first**division**for a number of small divisions within this segment. At a school meeting, for example, one centimeter should be divided into ten divisions. Get one millimeter. So the price of a small**division**on the school line is equal to one millimeter.4

Now define

**the price**of minor tick marks, if they are on the measuring instrument. For example, at a school meeting, two additional**division**in one centimetre. Therefore, we need one centimeter divided into two**division**- will be five millimeters. So the price of a additional**division**on the ruler is millimeter.Note

Don't forget that counting division signed division is also necessary to take into account.

# Advice 3: How to determine the price of division of the devices

Measuring instruments usually have a scale. This means that it shows a dashed

**dividing**, and a number written in numeric values corresponding**dividing**m. the distance between the two strokes, next to which is written the value of physical quantity, can be further divided into several divisions that are not signed numbers. The distance between two successive strokes is called the price**of division**of the instrument scale, which you must define before using the equipment.Instruction

1

Before find

**price****division**, look closely at the device itself: what it measures, what the units of his health. This will allow to draw a complete picture of the ongoing experience, by definition, of varying magnitude. Locate the two nearest scale bar, near which are written numerical values. Count how many tick marks between them (but not strokes).2

Example. If you can determine

**the price****of division**of household thermometer. Nearby signed touches 10 and 20 degrees Celsius. Is placed between them to ten divisions.Find the positive difference between the selected numeric value, to do this, subtract a larger number from a smaller number. The resulting difference divide by the number of divisions between them. The resulting quotient is the cost**of division**, without knowledge of which you do not define the meter.3

Example. 20-10=10 degrees Celsius. The difference, equal to ten degrees Celsius, is divided into ten divisions between the strokes: 10/10=1 degree Celsius. So, the price

**of division**of the selected thermometer is equal to one degree Celsius.Note

Different devices are called the same, could be different scale, so the scale may differ.

# Advice 4: How to determine the price of division of the voltmeter

After replacement of the scale or other repair need to check accuracy or to calibrate the scale

**of the voltmeter**. This check can be done in several simple ways. Depending on the required accuracy and the available devices, use one of the methods described below.You will need

- power supply with built-in voltmeter, power supply 12 Volt, variable wirewound resistor 1 ohms, the bulb at 12 Volts, the reference voltmeter, connecting wires, a measuring instrument to power circuits AC and DC type УИ300.1.

Instruction

1

Connect a voltmeter to check the power supply with a built-in voltmeter. Regulator output voltage unit, make sure the output voltage is 1 Volt. Check the note on the scale

**of the voltmeter**position, which stopped his arrow. Successively performing this operation with a step of 1 Volt, full scale space of the second device. Then reset the voltage of the power supply and unplug it. Then mark intermediate values of the scale**of the voltmeter**. If the scale is non-linear, it turns out, the markup of intermediate values apply in proportion to the location of the main markup. This method gives a layout with a low accuracy of calibration, which is limited by the accuracy of the readings**of the voltmeter**on the power supply.2

Greater accuracy of calibration gives a second method, which uses a standard voltmeter. Sequentially connect a variable resistor and a light bulb at 12 Volts. In parallel to the lamp, connect the reference and check the voltmeter. The free output resistor and a second wire from the lamp plug to the power source. Turning the knob of the resistor, read the voltage readings from reference

**voltmeter**and focusing on them, apply markup to the scale mark of the device in increments of 1 Volts. Check if the device is designed for higher voltage, use a power supply, the reference voltmeter and light bulb to the higher voltage.3

Use for the calibration of the measuring instrument to power circuits AC and DC type УИ300.1 will give high accuracy of marking check

**of the voltmeter**. Connect the voltmeter and following the instructions of the operating instructions in УИ300.1, traderoute it.# Advice 5: How to find the price of division of the device

If measurements are made with

**instruments**with digital display, readings can be removed without any problems. If the measuring devices applied scale, in order to accurately measure value, it is necessary to know**the price***of division*of the device. Sometimes it is indicated on the scale, if it is not, calculate it yourself.You will need

- devices with different scales.

Instruction

1

Carefully inspect the dial of an analog device, which measurements are performed. It marked the units with which operates this device. On any scale applied to the numeric value of the measured value between which are

*dividing*without quantitative indicators. The value enclosed between them is the smallest that can be measured with an instrument. The price*of division*of the device is the smallest value that can be measured by a device with the scale. This lowest price is enclosed in the smallest division of the instrument scale.2

On the scale, find the two closest numeric values. It is absolutely not important, their order. For example, if the measuring cylinder, which you can use to measure the volume of liquid in ml, applied numerical values 0, 100, 200, 300, 400, 500, you can take a pair of numbers, 0 and 100, 100 and 200 or 400 or 500 or any other pair of numbers on this principle. Subtract from the larger numerical values smaller.

3

Count

*of division*between the nearest numerical values on the scale. When calculating keep in mind that division is called the distance between two successive scale lines, not the lines. Calculate**the price***of division*of the device by dividing the difference of the two closest numeric values of the scale for the number of divisions between them. This will be the minimum value of the measured device.4

For example, to find

**the price***of division*of the scale of the voltmeter that measures the voltage in volts, with numbers 0, 2, 4, 6, 8, and five*of the division*, the mi between the two closest numeric values, perform a sequence of actions. Take the two closest numeric values - let it be 4 and 6. Now from the larger number subtract the smallest - you will get 2. This number divide by the number of divisions between these values (on the condition it is equal to 5). Get 2/5=0,4 volts. The price*of division*of the voltmeter is equal to 0.4 V.