كيفيت و استانداردهاى خاص لودسل

سازمان بين المللى مترولوژى: اين سازمان يك موسسه بين المللى رسمى براى استاندارد نمودن مقررات و شيوه هاى كنترل مترولوژى (اندازه گيرى) است. اين مقررات توسط ادارات اوزان و مقادير كشورهاى عضو پذيرفته شده است. لودسل هاى داراى گواهينامه OIML بعنوان يك وسيله اندازه گيرى قانون در سراسر اروپا شناخته مى شوند.

International Organization of Legal Metrology is a World-Wide organization whose aims are to standardize regulations and metrological controls applied by the Weights and Measures of its member states. OIML certified load cells can be used as a module in Type Approval Certificates (TACs) throughout Europe.

گواهينامه Ex: اين گواهينامه براى محصولاتى كه شرايط هماهنگ استانداردهاى اروپايى را رعايت مى كنند صادر مى شود. EN50.014 شرايط عمومى براى وسايل الكترونيكى را در محيط هاى انفجارى بيان مى كند. EN50.020 و EN50.018 درجه مقاومت وسيله در مقابل آتش سوزى را مشخص مى نمايند. EEx ia و EEx ib مشخصات آن دسته از وسايل الكترونيكى را معين مى كند كه مى توانند به ترتيب در زون هاى صفر و يك مورد استفاده قرار گيرند.

Ex Certificates of Conformity are issued for products which have been found to comply with the harmonized European standards: EN 50.014 general requirements for electrical apparatus for potentially explosive atmospheres, EN 50.020 intrinsic safety "i" and EN 50.018 Flameproof enclosure "d". Products labelled EEX ib and ia can be used in zone 1/2 and zone 0 applications, when connected to approved intrinsically safe circuits (barriers, etc.) and installed properly.

استاندارد ارزيابى ملى: NTEP مجموعه مقرراتى است كه با همكارى موسسه ملى اوزان و مقادير و انجمن اوزان و مقادير آمريكا و دست اندركاران ساخت وسايل توزين تهيه شده است.

National Type Evaluation Program is a program of cooperation between the National Conference on Weights and Measures, NIST (USA), state weights and measures officials, and the private sector for determining conformance weighing equipment with provisions of Handbook 44.

Factory Mutual System: اين گواهينامه آمريكايى براى نشان دادن درجه ايمنى كالا مى باشد. تمام محصولاتى كه داراى اين گواهينامه هستند، مى توانند در محيط هاى صنعتى پر خطر مورد استفاده قرار گيرند.

Factory Mutual is the American approval for intrinsic safety. All products showing this symbol have been approved for use in hazardous areas provided safety barriers are used and properly installed.

درجه حفاظت IP: اين درجه بندى كه توسط نظام بين المللى حفاظت تعريف شده است، ميزان آب بندى وسايل الكترونيكى را بر اساس IEC529 و IEC60.529 تعيين مى كند.
IP66: مقاوم در مقابل ريزش پر فشار آب
IP67: مغروق در آب
IP68: مغروق در آب تحت فشار

IP Rating given by the International protection System, defines environmental sealing of electrical enclosures are prescribed by IEC 529 / EN60.529. Protection is provided against.
IP66: Exposure to strong jets of water
IP67: Immersion in water
IP68: Indefinite immersion in water


INTRODUCTION TO IP-RATINGS
The IP rating system provides a means of classifying the degree of protection from dust and water afforded by electrical equipment and enclosures. The system is recognized in most countries and is set out in a number of standards, including IEC 60529.
1st Digit:
Protection against foreign, solid objects
2nd Digit:
Protection against liquids and moisture
IP x… Description / Test IP ...y Description / Test
0 No Protection. 0 No Protection.
1 Protected against solid objects Over 50 mm, e.g. accidental Touch by hands. 1 Protected against vertically falling drops of water.
2 Protected against solid objects Over 12 mm, e.g. fingers. 2 Protected against direct sprays of water up to 15˚ from the vertical.
3 Prtected against solid objects Over 2.5 mm, ( tools / wires ) 3 Protected against sprays to 60˚ from the vertical.
4 Protected against solid objects Over 1 mm, ( tools / wires /small wires ). 4
Protected against water sprayed from all directions – limited ingress permitted.
5 Protected against dust – limited Ingress ( no harmful deposit ). 5
Protected against low pressure jets of water from all directions - limited ingress permitted.
6 Totally Protected against dust. 6 Protected against strong jets of water, e.g. for use on shipdecks – limited ingress permitted.

Example:
IP67: Totally Protected against dust and Protected against the effects of immersion between 15 cm and 1 m.
7
Protected against the effects of immersion between 15 cm and 1 m.



8 ...m
Protected against long periods of immersion under pressure.