| AC output section | TOS9300 | TOS9301 | TOS9301PD | TOS9302 | TOS9303 | TOS9303LC | |
|---|---|---|---|---|---|---|---|
| Voltmeter | Measurement range | 0 kV to 7.5 kV AC/DC | |||||
| Resolution | 0.1 V | ||||||
| Accuracy | ±(1.2 % of reading + 0.005 kV) | ||||||
| Response | Can be switched between true rms and mean-value response rms conversion. | ||||||
| Peak-value response in a separate system (the peak-value response is for measuring the dielectric breakdown voltage while rising) | |||||||
| Hold function | The voltage measurement after a test is finished is held while the pass/fail judgment is displayed. | ||||||
| Ammeter *1 *2 | Measurement range | AC: 0.00 mA to 110 mA, DC: 0.00 mA to 22 mA (Current including the active component and reactive component) | |||||
| Accuracy | ±(1 % of reading + 2 μA) (active component) | ||||||
| Response | Can be switched between true rms and mean-value response rms conversion. | ||||||
| Hold function | The current measurement after a test is finished is held while the pass judgment is displayed. | ||||||
| Offset cancel function | Cancels up to 10 mA of the current flowing through the insulation resistance and stray capacitance components across output cables and the like (resistance component only for DC tests). OFF function available. | ||||||
| Calibration | Active component: Calibrated with the rms of a sine wave using a pure resistive load. Reactive component: Not calibrated. | ||||||
*1 During AC voltage tests, current also flows in the stray capacitance of items such as the test leads and tools. For details on stray capacitance, see “Stray Capacitance of AC Withstanding Voltage Tests” *2 When the temperature and humidity are high, erroneous current from the product’s internal and external high-voltage wiring sections to ground increases. When the humidity exceeds 70 %, an erroneous current of about 50 μA may be generated.
