White Matter NanoZ Manuel d'utilisateur télécharger pdf (Page 40)

nanoZ User Manual

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The following table shows the channel mapping for the bank of test resistors (1%

tolerance) and capacitors (5% tolerance) on the supplied NZ-CAL adaptor.

channel

R (MOhm)

C (nF)

channel

R (MOhm)

C (nF)

6.8

short circuit

0.1*

0.12

4.7

1.0

3.3

1.0

0.0051

2.2

0.51

1.0

0.010

1.5

1.0

100

1.0

0.82

0.22

8.2

0.033

1.0

0.020

13.3

1.0

open circuit

0.051

* R and C in parallel

The measured phase angle of pure resistors should be 0°, with an impedance

that is independent of test frequency, whereas pure capacitors should report a

phase angle of -90°, with an impedance magnitude that varies inversely with

frequency. For comparison, most electrophysiology electrodes will have a phase

angle between -50° and -80°, depending on the electrode metal and coatings.

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White Matter NanoZ Manuel d'utilisateur Page 40