Laboreszköz katalógus
Marketplace
0Cart
Homepage Calibration weight selection guide

Calibration weight selection guide

Help to choose the correct class calibration weight.

Permissible inaccuracy of calibration weight classes according to OIML R111:2004

Nominal mass E1 E2 F1 F2 M1 M1-2 M2 M2-3 M3
  +/- mg +/- mg +/- mg +/- mg +/- mg +/- mg +/- mg +/- mg +/- mg
1 mg 0.003 0.006 0.020 0.06 0.20        
2 mg 0.003 0.006 0.020 0.06 0.20        
5 mg 0.003 0.006 0.020 0.06 0.20        
10 mg 0.003 0.008 0.025 0.08 0.25        
20 mg 0.003 0.010 0.03 0.10 0.3        
50 mg 0.004 0.012 0.04 0.12 0.4        
100 mg 0.005 0.016 0.05 0.16 0.5   1.6    
200 mg 0.006 0.020 0.06 0.20 0.6   2.0    
500 mg 0.008 0.025 0.08 0.25 0.8   2.5    
1 g 0.010 0.030 0.10 0.3 1.0   3.0   10
2 g 0.012 0.040 0.12 0.4 1.2   4.0   12
5 g 0.016 0.050 0.16 0.5 1.6   5.0   16
10 g 0.020 0.060 0.20 0.6 2.0   6.0   20
20 g 0.025 0.080 0.25 0.8 2.5   8.0   25
50 g 0.030 0.10 0.3 1.0 3.0   10   30
100 g 0.05 0.16 0.5 1.6 5   16   50
200 g 0.10 0.30 1.0 3.0 10   30   100
500 g 0.25 0.80 2.5 8.0 25   80   250
1 kg 0.5 1.6 5 16 50   160   500
2 kg 1.0 3.0 10 30 100   300   1
5 kg 2.5 8.0 25 80 250   800   2.500
10 kg 5 16 50 160 500   1,600   5,000
20 kg 10 30 100 300 1,000   3,000   10,000
50 kg 25 80 250 800 2,500 5,000 8,000 16,000 25,000
    +/- g +/- g +/- g +/- g +/- g +/- g +/- g +/- g
100 kg   0.16 0.5 1.6 5 10 16 30 50
200 kg   0.30 1.0 3.0 10 20 30 60 100
500 kg   0.80 2.5 8.0 25 50 80 160 250
1.000 kg   1.6 5 16 50 100 160 300 500
2.000 kg     10 30 100 200 300 600 1,000
5.000 kg     25 80 250 500 800 1,600 2,500

Definition of accuracy class

Pontossági osztály osztásköz szerintCalculate the number of scale divisions by dividing the measuring range by the resolution.

Example: 1000 g load capacity scale with 10 mg accuracy:

képlet

Required accuracy class of calibration weight: F1

Balance accuracy Balance division Required accuracy class
IV general use balance ≤ 1,000 d M3
III medium precision balance ≤ 10,000 d M1
II precision balance ≤ 30,000 d F2
  ≤ 100,000 d F1
I analytical balance > 100,000 d E2

 

Selection of required weights

If it is sufficient to check the balance's performance at one point, it must be done at the nominal load or at least 80% of the nominal load. It leads to a more accurate measurement if the calibration is done with one weight, not a combination of several weights.

In order to have a more accurate weight control, it is necessary to choose a calibration weight corresponding to 25%, 50%, 75% and 100% of the capacity.