Section 4 Corrections
VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual
- 29 -
4.2
Correcting the product
Use the following procedure to make corrections.
Point
●
The product has a zero shift function (approx. 25%).
●
The measurement range of this product is always centered on the null
point.
If corrections are completed successfully, the input/output conversion precision indicated in the
specifications will be met within approximately 5 minutes after the next time the power supply is
turned on.
If the product does not operate correctly according to the specifications, contact the sales office
where it was purchased for assistance.
1
Turn on the power supply.
2
Move the LVDT core so that the T.P. output
becomes 0.00V.
3
Adjust the zero adjustment volume until the
output is 3V or 12mA.
4
Move the LVDT core to the 100% position on
the measuring range.
5
Adjust the span adjustment volume until the
output is 5V or 20mA.
6
Repeat steps 2 through 5 until the I/O
conversion precision satisfies the values
indicated in the specifications.
Zero adjustment
Potentiometer
Span adjustment
Potentiometer
Extension rod-end
toward LVDT
Extension rod-end
away from LVDT
Direct
Polarity
Reverse
Polarity
Increase
Increase
Decrease
Decrease
