Velleman ESR70 - Manual (Page 7)

Atlas ESR User Guide February 2008 – Rev 4
Page 7
Analysing Capacitors
continued…
Once a valid ESR reading has been obtained, the results are displayed.
If the presence of external circuitry did
not adversely affect the capacitance
measurement, the capacitor value will
also be shown.
If the capacitance could not be
determined, the display will only show
the value of ESR measured.
In the event that ESR exceeds the maximum that can be measured, the display
may show:
The ESR measurement range is automatically determined during the analysis.
Typically, the resolution for ESR measurement is as shown in the table below:
Although the measurement resolution is generally determined by the absolute
value of the ESR (as shown in the above table), low capacitance values can
result in a poorer ESR measurement resolution.
ESR Value Automatically
selected test current
Displayed
Resolution
0.00 Ω – 2.00 Ω 20mA 0.01 Ω
2.0 Ω – 20.0 Ω 2mA 0.1 Ω
* In Circuit *
ESR = 0.21
Cap = 476.6µF
ESR = 0.21
Cap = 476.6µF
ESR = >20.0 * In Circuit *
ESR = >20.0
or