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47DAC OPERATING MANUAL EM-9518-B Rev.4
33. USER CALIBRATION
User calibration is calibration by a customer using customer’s measuring instruments and standards.
To calibrate (adjust) the input signal, use “Teach Calibration” function. To compensate deviation between the DC output
and a device on site, use “Analog Output Adjustment” function.
The unit is calibrated correctly at shipment and therefore there is normally no need for customers to calibrate it.
33.1 TEACH CALIBRATION
You can calibrate the input signal by the Teach Calibration function if you need calibration.
Input scaling value Zero and Span can be adjusted by applying actual input signals.
Please note that M-System does not warrant the result of your own calibration (adjustment).
The internal calibration data is overwritten every time the unit is calibrated and it is stored even if the power is turned off.
However the data will be lost after an initialization.
Prepare measuring instruments and equipment for calibration by yourselves. Refer to each manual carefully for the instru-
ments and equipment for information on handling them.
33.1.1 TEACH CALIBRATION FLOW
The Teach Calibration is carried out as shown in the following flowchart.
IMPORTANT
• The calibration (adjustment) in the flow above is applicable to the selected input type. To calibrate (adjustment) with
other input type, set the type first in Scaling Setting Mode and then calibrate (adjust) according to the above flow.
• Warm up measuring instruments, equipment and other devices on site for the time specified in each manual, and oper-
ate the unit in a stable condition.
• In setting the input scaling values using actual inputs, carry out the Teach Calibration within the operational range per
input type. Do not set ‘input scaling value Zero ≥ input scaling value Span’ in carrying out the Teach Calibration.
• For setting input scaling value Zero and Span, proceed with the same method. The combination of inputting parameter
and Teach Calibration is unable.
• The input less than 5% is out of the assured accuracy. Apply 5% of the input scaling span for the teach calibration
(Zero) due to.
POWER ON
Warming up (10 min. or more)
Moving on to Scaling Setting Mode
Teach calibration (Zero)
Teach calibration (Span)
Back to Measuring Mode
Recalibration
(readjustment)
Confirming display value
(operation check)
Calibration (adjustment) completed
Measurement started