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imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19

111CS-7008-FD, CL-7016-FD

Important

If -IN and -VB are connected, care must be taken that the

potential difference between the signal source and the device

doesn't cause a significant compensation current. If the source's

potential can't be adjusted (because it has a fixed, overlooked

reference), there is a danger of damaging or destroying the

amplifier. If -IN and -VB are connected, then in practice a single-

end measurement is performed. This is no problem if there was

no ground reference beforehand.

5.8.1.3 Voltage source at a different fixed potential

The common mode voltage (V

) has to be less than ±10 V. It is

reduced by ½ input voltage.

Example

Suppose a voltage source is to be measured which is at a

potential of 120 V to ground. The system itself is grounded.

Since the common mode voltage is greater than permitted,

measurement is not possible. Also, the input voltage

difference to the amplifier ground would be above the upper

limit allowed. For such a task, the C-70xx cannot be used.

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IMC C SERIES Specifications

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