What is the maximum error of the GRAM scales?

Maximum error / deviation and minimum weight

  • Minimum weight:
    • Non calibrated scales = equal to resolution
    • Verified scales = 20 x resolution
  • Maximum error / deviation = Maximum error: 3 x resolution (in a linear way)

“Rule of thumb”

z. e.g. from 0-500 kg = 0x resolution (0 kg)

from 500 – 1500 kg = 1x resolution (1 kg)

1500 kg – 2500 kg = 2x resolution (2 kg)

2500 – 3000 kg = 3x resolution (3 kg)

Note: the greater the weighing range, the greater the error


Example 1

Capacity: 600 kg | resolution: 100 g

Maximum error: maximum capacity/ 3*resolution

(3*100g=300g) / 600 kg = 0,05%.

Maximum error for a weight of 50 kg:

50 kg * 0,05% = 0,025kg (=25g)


Example 2

1500 kg *0,04% = 0,6 kg =600 g max. deviation from real weight.

Capacity: 1.5 T | resolution 200 g ⟶ 1500 kg | 0.2 kg

max. error: max. capacity /3* resolution

(3*0.2 kg) = 0.6 kg

0.6 kg /1500 kg = 0.0004 kg

0.0004 kg *100 = 0.04%.

The maximum error at maximum load is 0.04%.

1500 kg *0.04% = 0.6 kg =600 g max. deviation from actual weight.


Example 3

Crane scale

Graph showing the weight displayed (t) in relation to the load (t)
Graph showing the weight displayed (t) in relation to the load (t)
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