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1
Calculate the output of load cell at the maximum display from the above conditions.
Check that the calculated value at this point is within the range from 0.4 mV/V to 3.1 mV/V.
If the value is out of the range, calibration cant’ be executed.
（Output of load cell at maximum display）
(Rated output)＋(Rated output)＋(Rated output)
Number of load cells
3 mV/V＋3 mV/V＋3 mV/V
3 points
1 mV/V
×
Weighing capacity
(No. of load cells)×(Rated load)
×
5t
3 points×5t
＝
＝
＝
2
After making the load cell to the initial load condition (tare weight), execute the calibration
according to the paragraph 5−2−3. In this case, input “5000” in the step 6, and input the load
value applied on the load cell in the step 8 individually.
3
If necessity requires, apply zero/span fine adjustment according the paragraph 5−2−4, and
5−2−5.
(3) When the load condition is clarified but the output condition of load cell is not clarified.
In the case of using the existing load detecting section, and adopting the new digital indicator
only, it is necessary to execute calibration after checking the output of load cell when its
output is not clarified.
For example, followings are calibration procedures when weighing capacity is 5 t and the
others are not clarified.
1
Set the instrument in the monitor mode according to the paragraph 7−19. In this condition,
the output level of load cell connecting with the instrument can be monitored up to approx.
3.100 0 with the unit of mV/V.
2
After making the load cell section to the initial load condition (tare weight), record the display
value on load display. This value is the output of load cell at the time of initial load condition.
3
Record the display value on load display after applying 5 t load on the load cell section. This
value is the output of load cell with weighing capacity applied.
4
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 the calculated value is within the range from 0.4 mV/V to 3.1 mV/V. The
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, “5000” in the step 5 and another input is the value of
“Output of load cell at the maximum display” calculated from the ④ in the step 8. 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 6 and also input “Load value going to
apply on load cell” in the step 8 individually.
7
As necessity requires, make fine adjustment on Zero and Span according to the paragraph
5−2−4 and 5−2−5.
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