RL-TA Series Operation Manual 43
14
Calibration and Span Test for the Balance
Span Adjustment
An electronic balance, which is influenced by the acceleration of gravity, indicates different values depending
on the location it is used. For this reason, you should calibrate your balance every time you relocate it. You
should also calibrate it after a long time of no use or when it does not indicate correct values.
To calibrate a balance is called span adjustment, which is required for highly accurate measurements.
Span Test
The span test is used to check the amount of offset in the span of the balance with respect to the reference
weight. Performing this function will not calibrate the balance.
* To adjust the span or perform a span test, wait at least five minutes after the power is turned on.
14.1
Span Adjustment with Built-In Weights
1.
Press the Cal key.
[
Aut. CAL
] is displayed.
2.
When [
PuSH C
] is displayed, press the Cal key again.
The built-in weight unit starts to operate, and the balance will automatically start span adjustment.
The display changes in the order of [
Aut. CAL
]
→
[
CH. 0
]
→
[
CH. F.S.
]
→
[
buSY
]
→
[
End
].
When span adjustment is completed, the display returns to normal.
14.2
Span Adjustment with External Weight
1.
Press the Cal key.
[
CAL EHt
] is displayed.
NOTE:
If CAL is pressed for too long, ArN will be displayed (see Section 14.8).
2.
When [
PuSH C
] is displayed, press the Cal key again.
The display first indicates
[
CAL EHt
]
→
[
on 0
]
, and the balance starts adjusting the zero-point.
(If a weight error is used, the corresponding weight error entered will be displayed for about two
seconds.)
