Stable Environment; Shielding Of Low Signal Measurements - Omicron Lab SPECTANO 100 User Manual

SPECTANO 100 User Manual
8.3

Stable environment

8.4

Shielding of low signal measurements

28
Figure 8-7 Measurement circuit, guarded electrode (C
capacitance)
The permittivity and dielectric losses vary with temperature and humidity.
Therefore, we recommend measuring the sample in a stable environment.
w signal measureme gnal measureme
To improve the signal-to-noise ratio for low current measurements, do the the signal-to-noise ratio for low e signal-to-noise ratio f
following improvements on the test setup: improvements on the test setup ovements on the tes
Put the test cell and/or test device into a EMC box to shield the test system ut the test cell and/or test devic est cell and/or tes
from external noise. from external noise. rnal noise.
Increase the test voltage. Increase the test voltage. ncrease the test vol
Separate guard and ground. Separate guard and gr eparate guar
Ensure the cabling is also shielded. Ensure the c Ensure the cabling
ded electrode (C
ric losses ses vary with temperature vary with temp
nd measuring the sample in a st suring the sample
ectrode (C is stray is stray is stray
s s