Nanometrics Dataloggers

Centaur High Gain

The High Gain Centaur models have preamp gains 4 times that of the standard Centaur models. This is not reflected in the Centaur's user interface, so the operator needs to be aware that when selecting for example 40Vpp range, the High-Gain Centaur is really operating with a 10Vpp range.

Preamp Gains: When configuring the Centaur, the user sets the input voltage range, which translates to choosing a preamplifier gain. Input range values of 10, 5, 2.5, 1, 0.5 and 0.25 Vpp correspond to gains of 4, 8, 16, 40, 80 and 160 respectively.

Decimation Filter Type: The operator can configure the digitizer to use linear-phase or minimum-phase decimation filters. Responses incorporating linear-phase and minimum-phase filters are given below.

Optional IIR DC Removal Filter: The responses given here that include the final IIR DC removal filter assume the operator has configured a first-order highpass filter with a low-frequency corner of 1 mHz (0.001 Hz). For other corner frequency values of a first-order filter, the pole in the last (nonzero) stage should instead be set to that corner frequency times 2 * pi. Other filtering options may be selected by the operator, in which case it is best to use the response generation feature available from within the instrument's user interface, or request a custom response from Nanometrics technical support.

Mary Templeton 11/15/2018