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ASTM Class Test Weights

 

Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
1
500 g
1
10 g
1
500 mg
1
10 mg
1
300 g
1
5 g
1
300 mg
1
5 mg
1
200 g
1
3 g
1
200 mg
1
3 mg
1
100 g
1
2 g
1
100 mg
1
2 mg
1
50 g
1
1 g
1
50 mg
1
1 mg
1
30 g
    
1
30 mg
    
1
20 g
    
1
20 mg
    
ASTM CLASS 1
500 g - 1 mg Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit12469
Apex-2469-cert
$ 2,305.00
$ 910.00
Pcs.
Wt
Pcs.
Wt
1
500 g
1
10 g
1
300 g
1
5 g
1
200 g
1
3 g
1
100 g
1
2 g
1
50 g
1
1 g
1
30 g
    
1
20 g
    
ASTM CLASS 1
500 g - 1 g Weight Kit
Standard
 Certs
Apex-TW-kit12472
Apex-12472-cert
$ 1,280.00
$ 910.00
Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
1
500 g
1
10 g
1
500 mg
1
300 g
1
5 g
1
300 mg
1
200 g
1
3 g
1
200 mg
1
100 g
1
2 g
1
100 mg
1
50 g
1
1 g
    
1
30 g
        
1
20 g
        
ASTM CLASS 1
500 g - 100 mg Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit45964
Apex-5964-cert
$ 2,172.00
$ 1,090.00
Pcs.
Wt
1
500 g
1
300 g
1
200 g
1
100 g
ASTM CLASS 1
500 g - 100 g Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit45968
Apex-45968cert
$ 910.00
$ 1,010.00

 

Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
1
1000 g
1
20 g
1
500 mg
1
10 mg
1
500 g
1
10 g
1
300 mg
1
5 mg
1
300 g
1
5 g
1
200 mg
1
3 mg
1
200 g
1
3 g
1
100 mg
1
2 mg
1
100 g
1
2 g
1
50 mg
1
1 mg
1
50 g
1
1 g
1
30 mg
    
1
30 g
    
1
20 mg
    
ASTM CLASS 1
1000 g - 1 mg Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit12473
Apex-12473-cert
$ 2,315.00
$ 1,120.00
Pcs.
Wt
Pcs.
Wt
1
1000 g
1
20 g
1
500 g
1
10 g
1
300 g
1
5 g
1
200 g
1
3 g
1
100 g
1
2 g
1
50 g
1
1 g
1
30 g
    
ASTM CLASS 1
1000 g - 1 g Weight Kit
Standard
 Certs
Apex-TW-kit12476
Apex-12476-cert
$ 2,270.00
$ 930.00
Pcs.
Wt
Pcs.
Wt
Pcs.
Wt
1
1000 g
1
20 g
1
500 mg
1
500 g
1
10 g
1
300 mg
1
300 g
1
5 g
1
200 mg
1
200 g
1
3 g
1
100 mg
1
100 g
1
2 g
    
1
50 g
1
1 g
    
1
30 g
        
ASTM CLASS 1
1000 g - 100 mg Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit45972
Apex-45972-cert
$ 2,275.00
$ 1,060.00
Pcs.
Wt
1
1000 g
1
500 g
1
300 g
1
200 g
1
100 g
ASTM CLASS 1
1000 g - 100 g Weight Kit
ASTM CLASS 1 - Standard
 ASTM CLASS 1 - Certs
Apex-TW-kit45976
Apex-TW-kit45976C
$ 1,975.00
$ 900.00

 

Accuracy Classes for Mass Standards and Test Weights
TYPICAL USE  
OIML
ASTM E617
NIST 1051
 
Weight Calibration Certificate Essential
Primary Laboratory Reference Standard
E1
-
-
High precision standards for calibration of weights and special precision analytical balances accuracy Classes I and II (class number depending on precision).
E2
-
-
-
0, 1
-
-   
Weight Calibration Certificate Recommended
High Accuracy Balances
F1
2
-
Working standard for precision analytical work, built-in weights and external weights used to calibrate moderate precision balances.
-
3
-
F2
-
-
-
Traceable Certificate Acceptable
Industrial Scales and Balances
-
4
-
Accuracy Class III industrial scales, dial scales, trip balances, platform scales. Also used for accuracy Class IIIL and IV, and weights used to calibrate scales in legal-for-trade applications.
M1
5
-
M2
6
F
M3
-
-
• ASTM Class 0: used as primary reference standards for calibrating other reference standards and weights.
• ASTM Class 1: Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high precision analytical balances with a readability as low as 0.1mg to 0.01mg.
• ASTM Class 2: Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01g to 0.001g.
• ASTM Class 3: Appropriate for calibrating balances with moderate precision, with a readability as low as 0.1g to 0.01g.
• ASTM Class 4 - For calibration of semi-analytical balances and for student use.
• NIST Class F - primarily used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians. Class F weights may be used to test most accuracy class III scales, all scales of class III L or IIII, and scales not marked with a class designation. Calibrated according to NIST Handbook 105-1
• OIML Class E1 - Used as primary reference standards for calibrating other reference standards and weights.
• OIML Class E2 - Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high precision analytical balances with a readability as low as 0.1mg to 0.01mg.
• OIML Class F1 - Appropriate for calibrating high-precision toploading balances with a readability as low as 0.01g to 0.001g.
• OIML Class F2 - For calibration of semi-analytical balances and for student use.
• OIML Class M1, M2, M3 - Economical Weights for general laboratory, industrial, commercial, technical and educational use. Typically fabricated from cast iron or brass. Class M2 commonly used for student brass weights.
Cert = Certificate Accuracy
Trace-Cert = Traceable Certificate.

 

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