Akurasi persyaratan untuk penjepit amperemeter
(1) Kapan mengukur the arus, the penjepit ammeter gigi harus menjadi sesuai, it is best to make the meter jarum jatuh to the scale of the scale of of 1/3 or more of the scale, because the deflection angle of the needle is too small, the scale value is not easy to distinguish, affecting the accuracy of the measurement.
(2) The measured wire should be placed as far as possible in the jaws of the central position, such as the measured wire is too oblique, the measured current in the jaws of the core of the magnetic induction intensity generated by the jaws will occur more substantial changes, directly affecting the accuracy of the measurement, generally due to the measured wire in the jaws of the improper position caused by The Measurement Error Can Be Up To 2% -5%.
(3) In order to make accurate readings, should make the iron core jaws of the two sides of the close. Jika Anda mendengar the elektromagnetik kebisingan dipancarkan oleh Rahang atau menggenggam the penjepit ammeter tangan has a sedikit getaran dari perasaan itu the rahang ujung wajah kombinasi adalah tidak ketat, ini waktu harus menjadi dibuka kembali, tutup rahang dari A waktu; IF The Murmur Still Exists, You Should Check The jaws End Face dengan ATAU Tanpa kotoran ATAU Rust, IF ADA SHOULD BE CLEARED sampai the rahang gabungan dengan a baik begitu jauh.
(4) untuk digital penjepit ammeter, meskipun in penggunaan dari baterai sebelum had diperiksa baterai daya, but in proses of pengukuran, harus juga membayar perhatian ke baterai daya situasi, jika Baterai tegangan IS DITEMUKAN TO BE TIDAK MENCUKUPI (SEPERTI AS KEMUNCULAN DARI A RENDAH VOLTASE PROMPT SIMBOL), MUST BE IN THE PENGGANTIAN OF BATERAI dan KEMUDIAN LANJUT TO Ukur; IF THE PENGUKURAN SITUS ada is elektromagnetik interferensi% 2c it is terikat untuk interfere the pengukuran dari the normal, it harus mencoba untuk mengecualikan the interferensi. Can benar baca pengukuran data% 2c tapi juga langsung terkait ke akurasi dari pengukuran .
(5) untuk the pointer type clamp meter head, first of all, should recognise the selected gear, and secondly, recognise which scale is used. Observe the scale value pointed out by the needle, the eyes should be facing the needle and scale to avoid squinting and reduce parallax. Meskipun tampilan dari digital kepala adalah lebih intuitif, tetapi the efektif melihat sudut dari LCD layar adalah sangat terbatas, the mata adalah terlalu miring kapan itu adalah mudah untuk membaca salah angka, tapi juga harus membayar perhatian untuk the desimal titik dan nya lokasi, yang harus tidak menjadi diabaikan.
(6) Measurement of the temperature of the place of abnormal or drastic changes will affect the accuracy of the measurement. Because the temperature change will make the meter error increases, thus reducing its accuracy. Clamp ammeter affected by the temperature is mainly due to: due to temperature changes in the composition of the instrument key structural components of the material performance results. Such as changes in ambient temperature often make the instrument to produce a reaction moment of the elasticity of the hairspring changes, so that the instrument value of the consequent changes, but also the formation of the magnetic field of the magnetic field changes, so that the instrument's role in the change in the size of the torque. In addition, due to changes in ambient temperature, the resistance of the line constituting the instrument, as well as a variety of electronic components, semiconductor device parameters will produce changes, the end result will affect the accuracy of the measurement.
(7) Dua atau lebih kabel tidak bisa menjadi dijepit at sama waktu selama pengukuran. Pengukuran dari arus kurang dari 5A atau kurang, in order to get a lebih akurat pembacaan, if kondisi izin, the kawat bisa be luka sekitar a beberapa lebih kali ke the jaws untuk pengukuran, but the aktual current value should be the reading divided by the number of turns of the wire put into the jaws.
