165
1
3
5
2
4
6
7
8
12
14
13
9
10
11
Electronic Balance Inspection Methods
Classes and Tolerance
1.
Decide upon the class and inspection tolerance (permissible
error range).
Check Table 1 and Table 2 for combinations of the balance’s minimum d display and capacity
to decide upon the class, and then set the inspection tolerance in accordance with the class.
Table 1
Minimum d
Display
Largest Maximum d Display = Capacity / d
≤5,000 ≤50,000 ≤500,000 >500,000
1g 4 3 2 1
0.1g 4 3 2 1
0.01g 3 3 2 1
0.001g 2 2 2 1
0.0001g 2 2 2 1
0.00001g AA AA AA AA
Table 2
Class Load Indicated with the Largest Maximum d Display = Load Value / Minimum d Display
≤500 ≤2,000 ≤5,000 ≤20,000 ≤50,000 ≤200,000 ≤500,000 ≤2,000,000 >2,000,000
4 ±5d ±10 d ±15 d
3 ±5d ±10 d ±15d
2 ±5d ±10d ±15d
1 ±5d ±10d ±15d
AA ±10 d ±20d ±30d
2. Repeatability inspection procedure
@ Models with internal weights for calibration purposes are calibrated with those weights.
(1) Weights close to half of the capacity or a single weight with a capacity that exceeds that are
to be placed on and removed from the pan five or more times, and records taken of the zero
point and the measurement value during the load. (A maximum of two weights may be used
if this is impossible.)
Instead of the recording the zero point measurement value, it is acceptable to only record
the value during the load if the weight is placed on the pan after it has been set at zero for
each display.
(2) Calculate the width (maximum value – minimum value) for each value at the zero point and
during load (only the value during load if the zero point was not measured), and if the result is
within inspection tolerance, it will be given a pass mark.
1133 Technical DocumentationTechnical Documentation
To Next Page
Loading...
Need help?
General
