Standard Calibration Weights (E1 Class)

Weights intended to ensure the traceability between the national mass standards (with values derived from the International Prototype of the kilogram) and weights of class E2 and lower. They are also used with mico-balances. Class E1 weights or weight sets shaIl be accompanied by a calibration certificate.

Description

Conformity : OIML R111-1 : 2004 Recommendation
The OIML recommendation R111-1 : 2004 for weights relates to sizes 1mg-500mg & 1g-20kg, Statements are made on the accuracy, materials, geometric shape, making and storage of the weights.

Stainless Steel Specification

Density

8500 ± 100kg/m³ (Wire Wts.)
8000 ±60 kg/m³ (Round Wts.)
Roughness: μm < 0.5 - μm < 0.1

Magnetic Susceptibility

m < 1g, ±<0.25
2g < m < 10g, ±<0.06 (Round Wts.)
m > 20g, ±<0.02 (Round Wts.)

Permanent magnetisation

Technical Specifications

Nominal Value	Reference	A	B	C	MPE ± δm in mg
1mg	0010319	4.5	6.5	0.1	3
2mg	0020319	4.2	6.3	0.13	3
2mg*	0020319	4.2	6.3	0.13	3
5mg	0030319	3.8	5.5	0.2	3
10mg	0040319	5.2	7.8	0.3	3
20mg	0050319	4.6	6.7	0.4	3
20mg*	0050319	4.6	6.7	0.4	3
50mg	0060319	3.9	5.4	0.6	4
100mg	0070319	7.4	9.7	0.8	5
200mg	0080319	8	9.8	1.0	6
200*mg	0080319	8	9.8	1.0	6
500mg	0090319	8.3	10.5	1.35	8

Technical Specifications

Nominal Value	Reference	ØA	B	C	MPE ± δm in mg
1g	101-4319	6.0	6.0	2.8	0.010
2g	102-4319	6.0	10.4	2.8	0.012
5g*	103-4319	8.0	14.45	3.9	0.016
10g	104-4319	10.0	18.0	4.6	0.020
20g	105-4319	13.0	21.6	5.6	0.025
50g	106-4319	18.0	28.6	8.0	0.030
100g	107-4319	22.0	38.0	11.0	0.05
200g	108-4319	28.0	46.8	12.5	0.10
500g	109-4319	38.0	63.5	17.0	0.25
1kg	201-4319	38.0	63.5	17.0	0.25
2kg	202-4319	60.0	101.5	28.0	1.0
5kg	203-4319	80.0	142.4	37.0	2.5
10kg	204-4319	100.0	181.6	47.0	5.0
20kg	205-4319	140.0	192.2	64.0	10