APPENDIX
17/11/2016 Version No. 002
171
Rate
Additional Rate Error Count
Med
60
Fast
200
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.
