Kalibrasi untuk magnetic yoke aplikasinya berupa verifikasi lifting powernya.
Secara garis besar magnetic yoke periode kalibrasinya selama satu tahun, tetapi untuk permanent yoke harus dilakukan pengecekan setiap akan digunakan. Kalibrasi juga dilakukan apabila yoke mengalami kerusakan dan diperbaiki.
Untuk kalibrasinya, AC yoke menggunakan standard weight 10lb. Sedang untuk Permanent yoke dan DC yoke menggunakan standard weight 40lb. Masing-masing di lakukan pada jarak Pole maksimum yang akan digunakan.

Tanya – Joko Hardono

Dear all,

Mohon pencerahan tentang kalibrasi Magnetic Yoke, apakah perlu dilakukan kalibrasi atau cukup dilkukan verifikasi secara internal terhadap standard weight. dan berapa lama periode kalibrasi atau verifikasi tersebut.

Terimakasih atas pencerahannya.

Tanggapan 1 – Bambang Supriyadi

seingat saya, memang harus ada kalibrasinya dan kalo tidak salah dilakukan 1 tahun sekali..(mohon dikoreksi kalo salah).

namun sepertinya pihak NDT MPI lebih tahu hal ini karena dikursusnya pun diajarkan cara kalibrasinya.

Tanggapan 2 – rery dwi saputra

Pak Joko,

Seingat saya hal itu ada di bahas di ASME sect V article 7 (CMIIW).
Kalibrasi untuk magnetic yoke aplikasinya berupa verifikasi lifting powernya.
Secara garis besar magnetic yoke periode kalibrasinya selama satu tahun, tetapi untuk permanent yoke harus dilakukan pengecekan setiap akan digunakan. Kalibrasi juga dilakukan apabila yoke mengalami kerusakan dan diperbaiki.
Untuk kalibrasinya, AC yoke menggunakan standard weight 10lb. Sedang untuk Permanent yoke dan DC yoke menggunakan standard weight 40lb. Masing-masing di lakukan pada jarak Pole maksimum yang akan digunakan.

Tanggapan 3 – Dylan T

T-760 CALIBRATION

T-761 Frequency of Calibration

T-761.1 Magnetizing Equipment

(a) Frequency. Magnetizing equipment with an ammeter shall be calibrated at least once a year, or whenever the equipment has been subjected to major electric repair, periodic overhaul, or damage. If equipment has not been in use for a year or more, calibration shall be done prior to first use.

(b) Procedure. The accuracy of the unit’s meter shall be verified annually by equipment traceable to a national standard. Comparative readings shall be taken for at least three different current output levels encompassing the usable range.

(c) Tolerance. The unit’s meter reading shall not deviate by more than ±10% of full scale, relative to the actual current value as shown by the test meter. T-761.2 Light Meters. Light meters shall be calibrated at least once a year or whenever a meter has been repaired.

If meters have not been in use for one year or more, calibration shall be done before being used. T-762 Lifting Power of Yokes

(a) Prior to use, the magnetizing power of electromagnetic yokes shall have been checked within the past year.

The magnetizing power of permanent magnetic yokes shall be checked daily prior to use. The magnetizing power of all yokes shall be checked whenever the yoke has been damaged or repaired.

(b) Each alternating current electromagnetic yoke shall have a lifting power of at least 10 lb (4.5 kg) at the maximum pole spacing that will be used.

(c) Each direct current or permanent magnetic yoke shall have a lifting power of at least 40 lb (18 kg) at the maximum pole spacing that will be used.

(d) Each weight shall be weighed with a scale from a reputable manufacturer and stenciled with the applicable nominal weight prior to first use. A weight need only be verified again if damaged in a manner that could have caused potential loss of material.

Terlampir kutipan Asme sect.V Articlet.7

Semoga Membantu,