45
3
As necessity requires, execute fine adjustment on Zero and Span according to the paragraph
5−2−4 and 5−2−5.
(3) When load condition is clear, but output condition of load cell is unclear
In the case of using the existed load detecting instrument, and only adopting this digital
indicator newly, it is necessary to execute calibration after checking the output of load cell of
which output is not clarified.
For example, following are calibration procedures when weighing capacity is 5 t and the others
are not clarified.
1
Set the instrument in monitor mode according to the paragraph 7−15. In this condition, the
output level of load cell connecting with the instrument can be monitored up to X.XXXX with
the unit of mV/V.
2
After making the load cell to the initial load condition(tare weight), note the display value on
load display. This value is output of load cell at the time of initial load condition.
3
Note the display value on load display after applying 5 t load on the load cell section.
This value is output of load cell on the condition of weighing capacity.
4
From the load cell output at the time of initial load application recorded at ②, and load cell
output recorded at ③ at the time of application of weighing capacity, output of load cell at the
time of maximum display can be calculated according to the below formula.
Check that this calculated value will exist within the range from 0.2 mV/V to 3.1 mV/V.
Calibration can’t be executed if the value is out of the range.
（Output of load cell at the time of maximum display）
＝(Output of load cell at weighing capacity) − (Output of load cell at initial load application)
5
Quit the monitor mode of the instrument.
6
After making the load cell to the initial load condition(Tare weight), execute calibration
according to the paragraph 5−2−1. In this case, the accuracy is less than 1/1 000 or so.
At this moment, input each value that one is “5000” in the step 5 and another is the value by
“Output of load cell at maximum display” calculated by ④ in the step 7. If the accuracy more
than of 1/1 000 or so is required, execute calibration according to the paragraph 5−2−3.
And at the same time, input “5000” in the step 5 and “Load value to be applied on load cell” in
the step 7 individually.
7
As necessity required, make fine adjustment on Zero and Span according to the paragraph
5−2−4 and 5−2−5.
(4) In case of replacing the existed CSD−581−15 with a new one
Warning ● The accuracy in this procedure is less than 1/1 000 or so.
If higher accuracy is required, make calibration by using actual load
according to the paragraph 5−3−1(2). Moreover, the accuracy
described here is a combined accuracy with the instrument and
connected strain gage applied transducer. When another error factors
may exist, such as constructional error factors or so, it will become
out of warranty of accuracy, so care should be taken fully.
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