44
For example, we will show the calibration procedures in the following procedures, that is, 3
points of load cells with 3 mV/V of rated output and 5 t of rated capacity.
Tare weight
1.5 t
Weighing capacity
5 t
Maximum display
5 000
1
Calculate the output of load cell at maximum display from the above conditions.
Check that the calculated value should be within the range from 0.2 mV/V to 3.1 mV/V.
If the value is out of the range, calibration can’t 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 capacity
)
×
5 t
3 points
×
5 t
＝
＝
＝
2
After making the load cell to the initial load condition(tare weight), execute the calibration
according to the paragraph 5
−
2
−
1. In this case, make input to “5 000” in step 5, and “1.000 0”
in step 7 each.
(2) When both load condition and output condition for load cell are clarified.
(In case that required accuracy is more than 1/1 000 or so.)
Warning
●
The accuracy obtained through the procedures of this calibration
consists from combined accuracy with the instrument and combined
strain gage applied transducer, the accuracy of weight used during the
calibration, error factors on mechanical and also error factors on
calibration works, that is , total accuracy of these. If high accuracy is
required, full considerations should be made on each factors. If
neglected, there will be a case that desired accuracy shall not be
obtained.
When high accuracy is required, actual load calibration by the weight and so on are required.
For example, we’ll show the calibration procedures in the following conditions, that is, 3 points
of load cells with 3 mV/V of rated output and 5 t of rated capacity.
Tare weight
1.5 t
Weighing capacity
5 t
Maximum display
5 000
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 0.2 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
×
×
5 t
3 points
×
5 t
＝
Weighing capacity
(
No. of load cells
)×(
Rated capacity
)
1 mV/V
＝
＝
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, make input “5 000” in step 5, and also input
“Load value on the load cell” in step 7 each.
Summary of Contents for CSD-581-15
Page 1: ...DIGITAL INDICATOR CSD 581 15 Instruction Manual EN294 1107 M ...
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