Loadcell Standards

Loadcell Standards:

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.

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.

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 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.

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.