Minebea CSA-521, Инструкция по эксплуатации

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7
4.
Calibration procedures

Warning
●
Before using the new instrument or after exchanging the strain gage applied transducer
with a new one, be sure to make calibration.
If calibration is not made, correct measured results may not be obtained, or it may cause
malfunction to the instrument and it may damage the peripheral equipment.
Moreover, even if calibration has made, there may occur the similar case as above when
the result is not correct. So make precise calibration again.
4
−
1. Preparations
According to the Chapter 3. Connecting method, connect the instrument and the strain gage
applied transducer properly, then supply the power.
4
−
2. Calibration procedures
Load calibration procedures for the instrument are two as follows:
1
Calibration by the actual load
2
Electronic calibration by CALIB input.

●
The accuracy of calibration obtained from
①
is 1/500 or so.
In the following paragraphs, we will describe each calibration procedure by showing the examples
with load cell applied.
4
−
2
−
1.
Calibration by the actual load
Procedures
1
Set the load cell to the condition at initial load
(tare weight).
When the initial load (tare weight) is exceeding
the
±
0.25 mV/V at the input conversion, cancel
the initial load (tare weight) referring to the
paragraph 4
−
3.
ZERO trimmer
SPAN trimmer
2
ZERO adjustment
Adjust the voltage output value to 0.000 V with
“ZERO” trimmer.
3
SPAN adjustment
Put the standard load such as weights (use it as
near rated capacity as possible) on the load cell,
and adjusts the “SPAN” trimmer to become the
voltage output value to be set.
4
Zero adjustment
After removing the standard weight set on step 3,
confirm the voltage output value to be at 0.000 V.
If not, return to the step 2.
5
Complete the calibration
5
Complete the calibration.