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9 Calibration and Span Test for the Balance
9.1
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.
* You must wait for at least 30 minutes after turning the power on, before performing span
adjustment.
9.1.1
Span Adjustment with Built-in Weight (Auto-span Adjustment)
* Only supported by the LN**R series units
1 Set Function1.
Select span adjustment with built-in weight (auto-span
adjustment) in Function1 [
].
Then, press the Set key to return to the weight display.
2 Start span adjustment.
Press the Cal key.
The built-in weight is enabled, and automatically starts span
adjustment.
The display indicates [
], [
]*, [
],
[
], [
], and [
] in sequence. When span
adjustment is completed, the balance goes back to the normal
weight display.
* While [
] is displayed, the balance is preparing to read the zero point. The remaining time is
indicated by the bar graph display. (Displayed with LN2202R, LN3202R, LN4202R)
9.1.2
Span Adjustment with External Weight
1 Set Function1.
Select span adjustment with built-in weight (auto-span
adjustment) in Function1 [
].
Then, press the Set key to return to the weight display.
2 Start span adjustment.
Press the Cal key.
The display first indicates [
], and then
[
], and the balance starts adjusting the zero-point.
(If weight error is used, the corresponding weight error entered
will be indicated for about 2 seconds.)
When the display indicates [
], put a weight on the
pan.
The balance starts adjusting the weighing capacity.
The display indicates [
] and then [
] in sequence.
When span adjustment is completed, the balance goes back to
the normal display.
→0←
g
CAL
→0←
○
g
Cal
Cal
→0←
○
g
→0←
○
g