GW Instek GDM-398 - Manual (Page 34)

MEASUREMENT OPERATION
32
3. Connect the test leads to the DUT.
The measured value shows on the display.
Note
 It takes a longer time to measure a capacitance of more than 100μF.
 The LCD displays OL to indicate that the tested capacitor is shorted or it exceeds
the maximum range.
 When capacitance measurement has been completed, disconnect all the
connections between the multi-purpose socket, capacitor and the Meter.