Macro Sensors LVC-2500, User Manual

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4.0 MATH Functions (cont.)
4.0 MATH Functions (cont.)
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Manual Part No. 0653 0003 0000 Rev B
Setting up two LVC for MATH can become confusing as the output of each LVC will affect the fi nal output. The steps below are
guidelines to help the set-up process.
Step 1 - Requirements
Write down the arithmetic required and the range of outputs likely to be seen. This will allow the requirement for each
individual LVC to be determined. Vout of each LVC is used.
Example: ±10 V required for A-B.
If each LVC is set to ±10 V, then A-B would calculate to be ±20 V. However, as this is not possible, each LVC must be set to ±5 V
or use ±10 V (A-B)/2.
Example: 0-10 V required for A+B.
Set each LVC for 0-5 V or set each LVC to 0-10 V and use (A+B)/2.
Step 2 - Initial set-up
Set up each LVC as an individual module fi rst.
Working around transducer null and having a ±V output will make set-up easier.
Step 3 - Final checks and further comments
Initially each LVC Vout may have been set to an accurate zero but an offset may still be seen at Mout. This is because of
offsets inherent within the MATH circuits. To remove this offset, adjust one of the Vout offsets. Mout offset adjustment is best
performed on the LVC set for MATH.
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2
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A+B A-B
LINK FOR
(X)/2
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2
3
4
1
2
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4
1
2
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4
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2
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4
1
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4.2 MATH Set-up Procedure
A+B A-B (A+B)/2 (A-B)/2 Mout=Vout