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

95CS-3008-FD

5.5.1.3 Case 2: Voltage source without ground reference

The voltage source itself has no reference to the

device's ground, but instead, its potential floats

freely compared to the device ground. If a

ground reference cannot be established, it's also

possible to connect the negative signal input –IN

to the ground contact GND.

Example

A voltage source which isn't grounded (e.g. a battery) and whose contacts have no connection to

ground potential is measured. The measurement system is grounded.

Note

When –IN and GND are connected, be sure that the signal source's potential can actually be drawn to

the device ground's potential without an appreciable current flowing. If the source can't be brought to

that potential level (because it turns out to be at fixed potential after all), there is a risk of permanent

damage to the amplifier. If IN and GND are connected, a single end measurement is performed. This

isn't a problem unless a ground reference already existed.

5.5.2 Bandwidth

The channels' max. sampling rate is 100 kSamples/s (10

s sampling interval). The analog bandwidth

(without digital low-pass filtering) is: 48 kHz (-3 dB). In AC mode the lower cut off frequency is 0.37 Hz for

5.5.3 Connection

The interconnections are of the type BNC.

IMC C SERIES User Manual

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