105
2
4
1
3
5
6
7
11
13
12
8
9
10
14
Appendices
A-7.
Performance Checks
Not applicable to a verified balance as a legal measuring instrument in using region
Notes
Performance checks should be conducted in a room where there are no
sudden temperature changes.
Refer to the installation guidelines for the environmental factors that assure optimal
performance.
Repeatability
1
Allow the balance to warm up sufficiently by
turning ON the power and leaving it at the
gramdisplay at least two hours before starting
the performance checks.
2
Choose a weight that is near half the capacity of
the balance. Load and unload the weight five
successive times and record the following items:
Xi: Displayed value when the weight is
loaded.
Yi: Displayed value when the weight is
unloaded.
Load and unload a weight which is near the
capacity of the balance five successive times.
Load: X
1
, X
2
,…Xi,…X
5
Unload: Y
1
, Y
2
,…Yi,…Y
5
R
x
= X
max
- X
min
or
R
y
= Y
max
- Y
min
max is maximum value and min is minimum value.
3
Use the formulas shown below to calculate the
values Rx and Ry.
4
Balance repeatability is considered normal when
both Rx and Ry are within five counts. * One
count corresponds to one minimum display unit
of the balance model.
Summary of Contents for UP1023X
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