Momwe Mungawerengere ma Ohms pa Multimeter (3 Njira Zowongolera)
Zida ndi Malangizo

Momwe Mungawerengere ma Ohms pa Multimeter (3 Njira Zowongolera)

19.02.2023 /

Ohmmeter kapena digito ohmmeter ndiyothandiza poyezera kukana kwa gawo lamagetsi. Poyerekeza ndi anzawo analogi, digito ohm ndi yosavuta kugwiritsa ntchito. Ngakhale ma ohmeters amatha kusiyanasiyana malinga ndi chitsanzo, amagwira ntchito mofananamo. Mwachitsanzo, chiwonetsero chachikulu cha digito chikuwonetsa sikelo yoyezera ndi mtengo wokana, nambala yomwe nthawi zambiri imatsatiridwa ndi malo amodzi kapena awiri.

Nkhaniyi ikuwonetsani momwe mungawerenge ma ohms pa multimeter ya digito.

Zinthu zofunika kuzizindikira poyamba

Mukaphunzira kuwerenga ma ohms pa multimeter, ndikofunikira kudziwa kuti chipangizocho chimayesa kulondola kwa kukana, kuchuluka kwake kwa magwiridwe antchito, komanso magetsi ndi magetsi. Chifukwa chake, izi zikutanthauza kuti mutha kuzigwiritsa ntchito poyesa kukana mu gawo losadziwika.

Ndi kuthekera koyezera kukana, zida za multimeter zimathanso kuyesa mabwalo otseguka kapena ogwedezeka ndi magetsi. Timalangiza ogwiritsa ntchito kuyesa multimeter poyamba kuti atsimikizire kuti ikugwira ntchito bwino. (1)

Tiyeni tsopano tipitirire ku njira zitatu zoyezera kukana pa multimeter.

Kuwerenga chiwonetsero cha digito

  1. Gawo loyamba ndikutanthauzira sikelo yolozera. Pafupi ndi omega, pezani "K" kapena "M". Pa ohmmeter yanu, chizindikiro cha omega chikuwonetsa kuchuluka kwa kukana. Chiwonetserocho chimawonjezera "K" kapena "M" kutsogolo kwa chizindikiro cha omega ngati kukana kwa zomwe mukuyesa kuli pa kiloohm kapena megaohm range. Mwachitsanzo, ngati muli ndi chizindikiro cha omega chokha ndipo mumawerenga 3.4, zomwe zimamasulira ku 3.4 ohms. Kumbali ina, ngati kuwerenga 3.4 kumatsatiridwa ndi "K" pamaso pa omega, zikutanthauza 3400 ohms (3.4 kOhm).
  1. Gawo lachiwiri ndikuwerenga mtengo wotsutsa. Kumvetsetsa digito ohmmeter scale ndi gawo la ndondomekoyi. Gawo lalikulu pakuwerenga chiwonetsero cha digito ndikumvetsetsa kufunika kokana. Pachiwonetsero cha digito, manambala akuwonetsedwa kutsogolo kwapakati ndipo, monga tanenera kale, amapita kumalo amodzi kapena awiri. Kukana komwe kumawonetsedwa pachiwonetsero cha digito kumayesa momwe zinthu kapena chipangizocho chimachepetsera mphamvu yamagetsi yomwe ikuyenda. Manambala apamwamba amatanthauza kukana kwakukulu, zomwe zikutanthauza kuti chipangizo chanu kapena zinthu zanu zimafunikira mphamvu zowonjezera kuti ziphatikize zigawozo mu dera. (2)
  1. Gawo lachitatu ndikuwunika ngati gawo lokhazikitsidwa ndi laling'ono kwambiri. Ngati muwona mizere yamadontho ochepa, "1" kapena "OL" kutanthauza kuti mozungulira, ndiye kuti mwatsitsa kwambiri. Mamita ena amabwera ndi autorange, koma ngati mulibe, muyenera kukhazikitsa nokha.

Momwe mungagwiritsire ntchito mita

Woyamba aliyense ayenera kudziwa kuwerenga ma ohms pa multimeter asanagwiritse ntchito. Posachedwapa muphunzira kuti kuwerenga kwa ma multimeter sikovuta monga momwe kumawonekera.

Umu ndi momwe mungachitire:

  1. Pezani batani la "mphamvu" kapena "ON / OFF" ndikusindikiza.
  2. Sankhani ntchito yotsutsa. Popeza multimeter imasiyana kuchokera ku chitsanzo kupita ku imzake, yang'anani malangizo a wopanga posankha mtengo wokana. Multimeter yanu ikhoza kubwera ndi dial kapena rotary switch. Yang'anani ndikusintha makonda.
  3. Dziwani kuti mutha kuyesa kukana kwa dera pomwe chipangizocho chimatsitsidwa. Kuyilumikiza kugwero lamagetsi kumatha kuwononga ma multimeter ndikupangitsa kuti kuwerenga kwanu kusakhale kovomerezeka.
  4. Ngati mukufuna kuyeza kukana kwa gawo lomwe lapatsidwa padera, nenani capacitor kapena resistor, chotsani ku chida. Mutha kudziwa momwe mungachotsere chigawo chimodzi pazida. Kenaka pitirizani kuyeza kukana mwa kukhudza ma probes ku zigawozo. Kodi mutha kuwona mawaya asiliva akutuluka muchigawocho? Awa ndi otsogolera.

Kusintha kwamitundu

Mukamagwiritsa ntchito multimeter ya autorange, imangosankha mtunduwo pomwe magetsi apezeka. Komabe, muyenera kuyika mawonekedwe pazomwe mukuyezera, monga zapano, magetsi, kapena kukana. Kuonjezera apo, poyezera zamakono, muyenera kulumikiza mawaya ndi zolumikizira zoyenera. M'munsimu muli chithunzi chosonyeza zilembo zomwe muyenera kuziwona pa bar range.

Ngati mukufuna kudziyika nokha mndandanda, ndi bwino kuti muyambe ndi mndandanda wapamwamba kwambiri womwe ulipo ndipo kenaka mupite kumunsi mpaka mutapeza kuwerenga kwa ohmmeter. Bwanji ngati ndidziwa kuchuluka kwa gawo lomwe likuyesedwa? Komabe, gwirani ntchito mpaka mutapeza kuwerenga kotsutsa.

Tsopano popeza mukudziwa kuwerenga ma ohms pa DMM, pali njira zina zodzitetezera zomwe muyenera kukumbukira. Onetsetsaninso kuti mukugwiritsa ntchito chipangizocho molondola. Nthawi zambiri, zolephera zimachitika chifukwa cha zolakwa za anthu.

Pansipa pali maupangiri ena ophunzirira ma multimeter omwe mungawunikenso kapena kuyika chizindikiro kuti muwerenge mtsogolo.

  • Momwe mungawerenge multimeter ya analogi
  • Cen-Tech 7-Function Digital Multimeter Overview
  • Chidule cha Power Probe multimeter

ayamikira

(1) kugwedezeka panthawi - https://www.mayoclinic.org/first-aid/first-aid-electrical-shock/basics/art-20056695

(2) mfundo za decimal - https://www.mathsisfun.com/definitions/decimal-point.html

Kuwonjezera ndemanga