At removal of indications for the electric power it is necessary to know that the new counter has initial indications more than unit. When replacing the electric counter of the indication are exposed not in zero state too. As to take of the meter reading not to count excess kilowatts?
1. If to you have replaced the electric meter, surely pay attention to the label which is usually left by the electrician. On it are recorded the instrument read the old and installed new counters.
2. To count electric power expense, take indications of the old counter at the time of removal and otminusuyta those indications which you transferred before this month, we will allow on August 5. Then on September 5 take readings of the new counter and take away the data left by the repairman on newof to the counter from this digit. Add on result to the number received when calculating on the old counter, and receive the total amount of indications in month. Further removals of indications will not bring trouble.
3. You just write down that value which shows the counter on the 5th day of every month and subtract those indications that were for the same date of the last month.
4. When replacing three-digit on the four-digit counter, it is necessary to consider some of their specifics. So, the whole revolution of the three-digit device, makes 1000 kWh, and turn of four-digit makes 10000 kWh., i.e., the three-digit counter doschityvat only up to 999 then on its screen there is unit again, and four-digit has the most bigger indication 9999, and then is returned by the beginning. Therefore, at account extract, to the meter reading add difference of indications before full commission of turn of the calculating mechanism. In this case determine expense of electrical energy by difference of meter readings which are written down on the date of extract of the next and previous account. Having increased the received electric power expense on tariff, you also receive the account sum.
5. It is necessary to know that the accuracy of measuring tools is measured by accuracy class. Usually room counters have class 2.5. It means that the counter which is absolutely serviceable can make accounting 2.5 percent less or more power rating. Therefore, it is not considered technical fault of the device.
6. Remember that the serviceable counter works within class of accuracy and at possible admissible overloads. At insignificant loadings the accuracy of its indications can decrease, and at absolutely small loadings the disk of the device can stand still and not rotate. Also keep in mind that if you have established call which constantly consumes the electric power, then even if other electric devices are switched off, the counter all the same will change a few indications. And it is not its breakage.