When starting up the the RadiSense and measuring at low E-field levels or frequency the reading can be unstable. This is due to the internal filtering in the field probe. The filtering is set as a standard to the "Dynamic" setting. This means that it is searching for the most stable reading. In cases of low test levels and/or frequency it is impossible to find this stable reading for the probe and the filter setting needs to be changed from Dynamic to Filter 6 or higher. This will make the reading stable for read-out.
This can be done through RadiMation under the advanced settings of the probe
The filter setting can also be changed using the RadiCentre CTR1004 and CTR1009 using the touch screen.