Analog multimetr va raqamli multimetr o'rtasidagi farq nima?
Voltajni o'lchashda kalit tugmasi holatiga qo'shimcha e'tibor bering va uni hech qachon oqim yoki qarshilik sozlamalariga qo'ymang. Aks holda, hisoblagich boshiga shikast etkazadi, bu esa hisoblagich ignasini hech bo'lmaganda egilishiga olib keladi va eng yomoni, kontaktlarning zanglashiga olib keladigan qismlarini yoki multimetrning gossamerini yoki burilish bobini yoqib yuboradi. Yuqori{2}}qarshilikdagi rezistorlarni o'lchashda, inson tanasi qarshiligini o'lchanayotgan rezistorga parallel ravishda ulashdan qochish uchun rezistorning ikki uchiga ikkala qo'lingiz bilan tegmang.
Asbobga o'rnatilgan rezistorning qarshiligini o'lchashda asbob quvvatini o'chirish kerak. Rezistorning bir uchini o'lchashdan oldin zanjirdan uzib qo'yish kerak. O'lchov qilinadigan kontaktlarning zanglashiga olib keladigan qismida katta sig'imga ega bo'lgan kondansatör mavjud bo'lsa, o'lchashdan oldin kondansatör zaryadsizlanishi kerak.
Qarshilikni o'lchashda nol ohm tugmasi har safar diapazon o'zgartirilganda qayta sozlanishi kerak. Agar nol ohm tugmachasini sozlash ko'rsatkichni nol ohmga qaratmasa, tugmani qattiq burama, balki batareyani yangisiga almashtiring. Qiymatni o'qiyotganda, ikkala ko'z bilan ko'rsatgichni vertikal ravishda kuzating va ko'zni qisib qo'ymang.
Multimetrni saqlashda konvertatsiya tugmachasini o'zgaruvchan tok va kuchlanish uchun eng yuqori sozlamaga qo'ying. Agar u uzoq vaqt ishlatilmasa, batareyani multimetrdan chiqarib oling. Multimetrni quruq, havalandırılan va toza muhitda saqlang.
Digital multimeter A multimeter that displays the measured electrical parameter values numerically is called a digital multimeter. Its measurement principle is completely different from that of an analog multimeter, resulting in a different structure and usage method. It features high sensitivity and accuracy, clear and intuitive display, stable performance, strong overload capacity, and portability. Usage: Although digital multimeters adopt overvoltage and overcurrent protection, operational errors (such as using the current or resistance range to measure voltage) should still be avoided. Before measurement, carefully check whether the range switch position meets the requirements. During use, attention should be paid to not placing the digital multimeter in high temperature (>40°C), high humidity (>80% yoki sovuq (<0°C) environments to avoid damaging the liquid crystal display.
Elektr yoylari paydo bo'lishining oldini olish uchun o'lchovlar paytida (kuchlanish > 220V, oqim > 0,5A) diapazonni o'zgartirishni sozlash qat'iyan man etiladi.
Suyuq kristall displeyning sifatini tekshirish uchun batareyalar yoki multimetrli rezistorlardan foydalanmang.
Ruxsatsiz multimetrning orqa qopqog'ini ochmang yoki uning qismlarini qismlarga ajratmang. Qopqoqning ichki qismi alyuminiy buzadigan amallar qog'ozi bilan yopishtirilgan, uni olib tashlamaslik kerak. Pastki "com" ga ulanadigan sim buzilmasligi kerak.
