GDM-8352 User Manual
152
Frequency
Measurement method: Reciprocal counting technique.
Input impedance: 1M
Ω
± 2% in parallel with <100pF on all ranges.
Maximum input voltage: 750 Vrms on all ranges.
Input protection: 1200V peak on all ranges with gas discharge.
Refresh Rate
Gate Time(sec)
Slow
1
Med
0.1
Fast
0.01
Capacitance
Measurement method: DC recharge & discharge.
Input protection: 500 Vpeak on all ranges.
The capacitor under test (Cx) is charged using a constant current
source. The time to charge Cx is recorded. The capacitor is then
discharged using a known resistance and the discharge time is
recorded. The value of the resistance depends on the capacitance
range that is selected. The charge and discharge time is used to
calculate the capacitance of Cx if the selected capacitance range is
equal to or less than 10nF. Only the charge time is used to calculate
the capacitance of Cx if the selected capacitance range is equal to or
greater than 100nF.
As measuring capacitance with the DMM is effectively a DC
measurement, the measured capacitance tends to be higher than
what is measured by LCR meters.
For best measurement results, first perform a zeroing of the test
leads when the cables are “open” to compensate for the test lead
capacitance.
