Service Manual
Page 32 of 50
Limits:
Conditions:
standard conditions.
Procedure:
n
10 times individual weighing with full load (nearest the capacity). Position on the center of the plate
n
10 times individual weighing with 50% of full load (nearest the capacity).
Position on the center of the plate.
n
If necessary, repeat measurements with other loads and tare values.
n
Measurements can be taken manually or automatically (computer test program or printer).
n
In the case of a zero indication deviation between the weighing, the instrument shall be reset to zero
without determining the error at zero.
n
Record: indication of 3 individual weighing processes for each load, and time behavior of each weighing
process.
Results:
Comparison of the indications with the required values, the highest and lowest indications for any given
load should be within 1 mpe of each other.
2. Linearity Test
Purpose:
Determination of the repeatability (deviation in multiple weighing processes of the same
load), and of the linearity behavior of the EUT.
References:
Product description.
Weighing
Max. error
0e<m<500e
£
0.5e
500e<m<2000e
£
1.0e
2000e<m<max
£
1.5e
Conditions:
standard conditions.
Procedure:
n
10 individual weighing processes at each load with at least 5 different loads (including zero point and full
load). Suggested individual weighing with 0, 1/6, 1/3, 2/3, 1 of full load.
n
When taking individual weight measurements at no load, tap the pan lightly to produce a visible change
on the indicator. After the reading stabilizes, this indication is the zero or zero error reading for no load.
n
Measurements can be taken manually or automatically (computer test program or printer).
n
Recorded data: zero point and indication of 10 individual weighing processes at each load, and if
necessary, the time behavior of each weighing process.
Results:
Comparison of the indications with the 10 individual weighing processes of each load, the highest and
lowest indications for any given load should be within 1 mpe of each other.
Levels
All
Max. error
Delta Span
£
1 Mpe
Weighing
Max. error
0e<m<500e
£
0.5e
500e<m<2000e
£
1.0e
2000e<m<max
£
1.5e
