14 Cov Lus Qhia Tshwj Xeeb rau Kev Siv Koj Cov Multimeter
Peb txhua tus paub tias multimeter yog ib qho tseem ceeb ntawm kev saib xyuas cov cuab yeej hauv kev ua haujlwm ntawm cov neeg ua haujlwm hluav taws xob. Kev siv cov multimeter kom raug tsis yog tsuas yog ua rau peb ua haujlwm tau zoo, tab sis kuj txhim kho kev nyab xeeb thiab kev ua haujlwm ntawm peb txoj haujlwm.
1. Before using the multimeter, "mechanical zero adjustment" should be performed first;
2. Tsis txhob kov cov hlau ntawm tus cwj mem xeem nrog koj txhais tes thaum lub sij hawm ntsuas, uas tsis tsuas yog ua kom qhov tseeb ntawm qhov ntsuas, tab sis kuj ua kom muaj kev nyab xeeb ntawm tus kheej;
3. Nyob rau hauv ib puag ncig nyuaj, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau qhov cuam tshuam ntawm sab nraud magnetic teb ntawm multimeter;
4. Txhawm rau txhim kho qhov ntsuas qhov tseeb, sim ua kom lub pointer ntawm multimeter nyob rau hauv nruab nrab txoj hauj lwm thaum ntsuas. Qhov ntsuas ntsuas yuav tsum tsim nyog, thiab rab koob yuav tsum tau offset ntau tshaj li ib nrab. Xaiv qhov ntau, yog tias nws tsis tuaj yeem kwv yees qhov ntsuas me me ua ntej, koj yuav tsum sim xaiv qhov loj dua, thiab tom qab ntawd maj mam hloov mus rau qhov me me raws li lub kaum sab xis deflection, kom txog rau thaum tus taw tes deflected mus txog 2/3 ntawm qhov ntsuas tag nrho;
5. When using a multimeter to test components with positive and negative polarity such as transistors and electrolytic capacitors, pay attention to the polarity relationship. The black and negative should be remembered clearly, and the black in the table should be connected to " plus ". The red test lead is the positive electrode, and the black test lead is the negative electrode, but the black test lead is connected to the positive electrode of the internal battery.
6. If the multimeter needs to be shifted, the test leads should be disconnected first, and then the measurement should be performed after shifting. Do not switch gears when measuring, and switch neutral gears after measuring. During the measurement, the selection knob cannot be turned arbitrarily, especially when measuring high voltage (such as 220V) or high current (such as 0.5A), so as to avoid arcing and burning out the contacts of the transfer switch. After the measurement is completed, the range selection switch should be turned to the "•" position;
7. When measuring resistance, zero adjustment should be performed every time the gear is changed. If it is not adjusted to zero, replace the battery with a new one. When measuring R, adjust zero first, and then adjust to zero when shifting gears. When measuring resistance, first turn the switch to the electric block, short-circuit the two test leads, and turn the "Ω" zero-adjustment potentiometer to make the pointer point to zero ohms before measuring. The ohmic zero should be readjusted every time the electrical barrier is replaced;
8. Tom qab siv multimeter, qhov hloov pauv yuav tsum tau muab tso rau hauv qhov siab tshaj plaws ntawm AC voltage;
9. Yog tias tsis siv lub sijhawm ntev, lub roj teeb sab hauv ntawm lub ntsuas hluav taws xob yuav tsum tau muab tshem tawm los tiv thaiv lub roj teeb ntawm corroding lwm yam khoom siv hauv lub 'meter';
10. Thaum ntsuas, saib qhov thaiv ua ntej, thiab tsis txhob ntsuas yam tsis saib. Txhua zaus koj tuaj tos cov kev xeem coj mus kuaj thiab npaj ntsuas, nco ntsoov xyuas dua seb qhov ntsuas qeb thiab ntau qhov kev xaiv hloov pauv nyob rau hauv txoj haujlwm raug. Yuav kom muaj kev nyab xeeb, tus cwj pwm no yuav tsum tau cog qoob loo;
11. Lub dial yuav tsum yog theem thiab cov kev nyeem ntawv yuav tsum ua kom haum. Thaum siv lub multimeter, nws yuav tsum tau tig kab rov tav, thiab qhov pom yuav tsum tig mus rau lub koob thaum nyeem ntawv;
12. Qhov ntsuas R tsis raug them, thiab qhov ntsuas C raug tso tawm ua ntej. Nws yog nruj me ntsis txwv tsis pub ntsuas kev tiv thaiv thaum lub Circuit Court nyob rau hauv kev ntsuam xyuas muaj ib tug point. Thaum kuaj xyuas qhov loj -capacity capacitors ntawm cov khoom siv hluav taws xob, lub capacitors yuav tsum luv luv-circuited thiab tawm ua ntej ntsuas;
13. Kev ntsuas kuv yuav tsum tau txuas nrog hauv cov koob, thiab qhov ntsuas U yuav tsum tau txuas nrog tib lub sijhawm. Thaum ntsuas tam sim no, lub multimeter yuav tsum tau txuas nrog hauv series hauv Circuit Court hauv kev sim; Thaum ntsuas qhov hluav taws xob, lub multimeter yuav tsum tau txuas mus rau qhov sib npaug ntawm ob qhov kawg ntawm lub voj voog nyob rau hauv kev sim;
14. Lub polarity tsis thim rov qab, thiab ib txhais tes ua tus cwj pwm. Thaum ntsuas qhov tam sim no thiab qhov hluav taws xob, kev saib xyuas tshwj xeeb yuav tsum tau them rau cov polarities ntawm cov kev xeem liab thiab dub uas tsis tuaj yeem thim rov qab, thiab tus cwj pwm ntawm ib qho kev ua haujlwm ntawm tes yuav tsum tau tsim kom muaj kev nyab xeeb.
