Appendices
101
A-6. Performance Check Guide
Not applicable to a verified balance as a legal measuring instrument in the EU
Repeatability
1
Leave the power on in mass display (backlight
of AUW series illuminates if it is set to on) and let
stand for one hour (two hours for AUW-D series).
2
Following chapter 11, set the stability and
response to the standard mode, set the stability
detection band to 1 count, and set zero tracking to
OFF.
3
With a pair of tweezers, place a weight close to
the weighing capacity on the pan and take it off
six times. For each time record
Xi: the value displayed each time the
weight is loaded
Yi: the value shown when the weight is
removed
Notes
• The following is a standard guideline used to determine whether the bal-
ance is working properly. The specific criterion can be set according to
each user’s requirements.
• Conduct the performance check in a location without changes in room tem-
perature. Install the balance following the instruction of this manual.
• Leave the calibration weight in the weighing chamber before start perfor-
mance check so that the temperatures will be equalized.
• For placing and removing the weight, use a long pair of tweezers. Do not
put hand into the weighing chamber.
Load and unload a weight close to
the capacity 6 times
Loaded: X1, X2...Xi...X6
Removed: Y1, Y2...Yi...Y6
Rx = Xmax-Xmin
Ry = Ymax-Ymin
(Max is the maximum value. Min is the minimum value.)
O/T
1d/1
0d
UN
IT
PRIN
T
PO
WE
R
B R
K
C A
L
ME
NU
For AUW-D series, perform steps 3 to 5 in
both large and small ranges.
