ASTM Class 1 Stackable Grip Handle Weights

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ASTM Class 1 Stackable Grip Handle Weights


ASTM Class 1 Stackable Grip Handle Weights

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ASTM Class 1 Stackable Grip Handle Weights

Available with or without NIST NVLAP certification.

5kg - No Certificate
10kg - No Certificate
20kg - No Certificate
30kg - No Certificate
5 Kg - With Certificate
5kg - No Certificate
10kg - No Certificate
20kg - No Certificate
30kg - No Certificate
5 Kg - With Certificate
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
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In Stock: 
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SKU:80781001
SKU:80781003
SKU:80781005
SKU:80781007
SKU:80781002
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10kg - With Certificate
20kg - With Certificate
30kg - With Certificate
10kg - With Certificate
20kg - With Certificate
30kg - With Certificate
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:80781004
SKU:80781006
SKU:80781008
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All sales on calibration weights are FINAL. Once you place an order for a calibration weight, it may not be canceled. Please be sure you have the correct item before you place your order. Calibration weights are custom manufactured and are certified on the date they are created. In addition, simply touching these weights with your hand can change the tolerance due to the oil in your skin. We will not accept any exchanges or refunds on calibration weights. No exceptions.

Which calibration weight should you choose?
A balance should be calibrated using a weight with a class tolerance factor greater than the readability of the balance.  For example if your balance has a readability of 1mg it should be calibrated with a weight having a known tolerance of .1mg or less.

What are the class differences?

OIML E2
provides the greatest precision we offer.  They are ideal for use as reference standards to calibrate other weights or for calibrating high-resolution analytical balances. The OIML E2 tolerance is approximately two times the precision of ANSI/ASTM Class 1.

ANSI/ASTM Class 1
can be used as reference standard in calibrating other weights and appropriate for calibrating high-precision analytical balances (from 0.01mg to 0.1mg).

ANSI/ASTM Class 2 Appropriate for calibrating high-precision toploading balances with readabilities ranging from 0.001g to 0.01g.

ANSI/ASTM Class 3
Appropriate for calibrating balances with moderate precision, ranging from 0.01g to 0.1g.

ANSI/ASTM Class 4
Appropriate for student use and semi-analytical weighing.

NIST Class F
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.

Metric Weight Tolerances - all tolerances stated in milligram (mg)
  (ASTM) American Society of Testing & Measurement
Denomi-
nation
Metric
Class 1
mg
Class 2
mg
Class 3
mg
Class 4
mg
Class 5
mg
Class 6
mg
Class 7
mg
5 kg 12 25 50 100 250 500 1400
3 kg 7.5 15 30 60 150 300 1000
2 kg 5.0 10 20 40 100 200 750
1 kg 2.5 5.0 10 20 50 100 470
500 g 1.2 2.5 5.0 10 30 50 300
300 g 0.75 1.5 3.0 6.0 20 30 210
200 g 0.50 1.0 2.0 4.0 15 20 160
100 g 0.25 0.50 1.0 2.0 9 10 100
50 g 0.12 0.25 0.60 1.2 5.6 7  
30 g 0.074 0.15 0.45 0.90 4.0 5 44
20 g 0.074 0.10 0.35 0.70 3.0 3 33
10 g 0.050 0.074 0.25 0.50 2.0 2 21
5 g 0.034 0.054 0.18 0.36 1.3 2 13
3g 0.034 0.054 0.15 0.30 0.95 2 9.4
2 g 0.034 0.054 0.13 0.26 0.75 2 7.0
1 g 0.034 0.054 0.10 0.20 0.50 2 4.5
500 mg 0.010 0.025 0.080 0.16 0.38 1 3.0
200 mg 0.010 0.025 0.060 0.12 0.26 1 1.8
100 mg 0.010 0.025 0.050 0.10 0.20 1 1.2
50 mg 0.010 0.014 0.042 0.085 0.16 0.5 0.88
20 mg 0.010 0.014 0.035 0.070 0.12 0.5 0.56
10 mg 0.010 0.014 0.030 0.060 0.10 0.5 0.4
5 mg 0.010 0.014 0.028 0.055 0.080 0.2  
2 mg 0.010 0.014 0.025 0.050 0.060 0.2  
1 mg 0.010 0.014 0.025 0.050 0.050 0.1  

(OIML) International Organization of Legal
Metrology Recommendation R111
E1
mg
E2
mg
F1
mg
F2
mg
M1
mg
M2
mg
M3
mg
2.5 7.5 25 75 250 750 2500
             
1.0 3.0 10 30 100 300 1000
0.5 1.5 5 15 50 150 500
0.25 0.75 2.5 7.5 25 75 250
             
0.1 0.30 1.0 3.0 10 30 100
0.05 0.15 0.5 1.5 5 15 50
0.030 0.10 0.30 1.0 3.0 10 30
             
0.025 0.080 0.25 0.8 2.5 8 25
0.020 0.060 0.20 0.6 2 6 20
0.015 0.050 0.15 0.5 1.5 5 15
             
0.012 0.040 0.12 0.4 1.2 4 12
0.010 0.030 0.10 0.3 1.0 3 10
0.008 0.025 0.08 0.25 0.80 2.5  
0.006 0.020 0.06 0.20 0.6 2  
0.005 0.015 0.05 0.15 0.5 1.5  
0.004 0.012 0.04 0.12 0.4    
0.003 0.010 0.03 0.10 0.30    
0.002 0.008 0.025 0.08 0.25    
0.002 0.006 0.020 0.06 0.20    
0.002 0.006 0.020 0.06 0.20    
0.002 0.006 0.020 0.06 0.20    

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