Test weights

How you find the right test weight for your balance: a balance can never be more accurate than the test weight used to adjust it, it all depends on its tolerance.
Accuracy of the test weight: Should correspond to the readout [d] of the balance, or rather be better.
Nominal weight value: This is shown in adjust mode “CAL” in the balance display. Given a choice, the heaviest weight is the most suitable for accurate measurement.
Once accuracy and nominal weight value are specified, the suitable test weight is selected according to the tolerances “Tol” of the individual accuracy classes E2 – M3, see column “Tol ± mg” at the respective weight and table bellow

From brass to stainless steel - the right test weight for every situation

Test weight	Cylindrical shape with lifting knob, polished stainless steel	Compact shape with carrying grip, polished stainless steel	Cylindrical shape with lifting knob, polished stainless steel or nickelplated and polished brass	Compact shape with carrying grip, finely turned stainless steel	Cylindrical shape with lifting knob, finely turned stainless steel	Cylindrical shape with lifting knob, finely turned brass
Features
Conforms to OIML:R111	yes	yes	yes	no	yes	yes
Available classes	E1, E2	E2, F1	F1	adjusted to F1 error limit class	F2, M1	M1, M2, M3
Upper surface	polished	polished	polished	finely turned	finely turned	finely turned
Material	Stainless steel	Stainless steel	Stainless steel or nickel-plated brass	Stainless steel	Stainless steel	Brass
Adjusting cavity	no	no	yes	yes, from 20 g	yes, from 20 g	yes, from 20 g
Marking (Milligram weights, generally none)	no	E2: None F1: Nominal value, etched	Nominal value, etched	Nominal value, etched	F2: Class + nominal value, etched; M1: Class + nominal value, adopted	Class + nominal value, adopted
Verification possible	yes	yes	yes	no	yes	yes, M1 only
Checking equipment for verification purposes	approved	approved	approved	not approved	approved	approved, M1 only
Ideal as checking equipment in QM systems (e.g. ISO 9000 ff)	yes	yes	yes	yes	yes	yes
Benefits	High-quality test weight for analytical and precision balances Highly-refined surface Ideal shape of the top for good grip	Affordable test weight for analytical and precision balances Highly refined surface	Ideal, high-quality test weight for precision balances Ideal shape of the top for good grip	Affordable test weight for in-house checking of precision balances	Ideal test weight for commercial and industrial scales Ideal shape of the top for good grip	Affordable test weight for commercial and industrial scales Ideal shape of the top for good grip

Mistake (tolerance) on weight according to OIML R 111

Weight

1 mg

±0.003mg

±0.006mg

±0.020mg

±0.06mg

±0.20mg

2 mg

±0.003mg

±0.006mg

±0.020mg

±0.06mg

±0.20mg

5 mg

±0.003mg

±0.006mg

±0.020mg

±0.06mg

±0.20mg

10 mg

±0.003mg

±0.008mg

±0.025mg

±0.08mg

±0.25mg

20 mg

±0.003mg

±0.010mg

±0.03mg

±0.10mg

±0.3mg

50 mg

±0.004mg

±0.012mg

±0.04mg

±0.12mg

±0.4mg

100 mg

±0.005mg

±0.016mg

±0.05mg

±0.16mg

±0.5mg

±1.6mg

200 mg

±0.006mg

±0.020mg

±0.06mg

±0.20mg

±0.6mg

±2.0mg

500 mg

±0.008mg

±0.025mg

±0.08mg

±0.25mg

±0.8mg

±2.5mg

1 g

±0.010mg

±0.03mg

±0.10mg

±0.3mg

±1.0mg

±3.0mg

±10mg

2 g

±0.012mg

±0.04mg

±0.12mg

±0.4mg

±1.2mg

±4.0mg

±12mg

5 g

±0.016mg

±0.05mg

±0.16mg

±0.5mg

±1.6mg

±5.0mg

±16mg

10 g

±0.020mg

±0.06mg

±0.20mg

±0.6mg

±2.0mg

±6.0mg

±20mg

20 g

±0.025mg

±0.08mg

±0.25mg

±0.8mg

±2.5mg

±8.0mg

±25mg

50 g

±0.03mg

±0.10mg

±0.3mg

±1.0mg

±3.0mg

±10mg

±30mg

100 g

±0.05mg

±0.16mg

±0.5mg

±1.6mg

±5.0mg

±16mg

±50mg

200 g

±0.10 mg

±0.3mg

±1.0mg

±3.0mg

±10mg

±30mg

±100mg

500 g

±0.25mg

±0.8mg

±2.5mg

±8.0mg

±25mg

±80mg

±250mg

1 kg

±0.5mg

±1.6mg

±5.0mg

±16mg

±50mg

±160mg

±500mg

2 kg

±1.0mg

±3.0mg

±10mg

±30mg

±100mg

±300mg

±1,0g

5 kg

±2.5mg

±8.0mg

±25mg

±80mg

±250mg

±800mg

±2,5g

10 kg

±5.0mg

±16mg

±50mg

±160mg

±500mg

±1,6g

±5,0g

20 kg

±10mg

±30mg

±100mg

±300mg

±1,0g

±3,0g

±10g

50 kg

±25mg

±80mg

±250mg

±800mg

±2,5g

±8,0g

±25g

100 kg

±160mg

±500mg

±1,6g

±5,0g

±16g

±50g

200 kg

±300mg

±1,0g

±3,0g

±10g

±30g

±100g

500 kg

±800mg

±2,5g

±8,0g

±25g

±80g

±250g

1000 kg

±1600mg

±5,0g

±16g

±50g

±160g

±500g

2000 kg

±10g

±30g

±100g

±300g

±1,0kg

5000 kg

±25g

±80g

±250g

±800g

±2,5kg

OIML E1

OIML E2

OIML F1

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Test weights