| Item | TOS9300 | TOS9301 | TOS9301PD | TOS9303 | TOS9303LC | |
|---|---|---|---|---|---|---|
| Grounding mode (GND) | Can be switched between Low and Guard. | |||||
| Low | GND is connected to the low terminal. Measures the current flowing across the low terminal and chassis (normal applications). | |||||
| Guard *1 | GND is connected to Guard. Measures only the current flowing through the low terminal (current flowing through the chassis is not measured) (high sensitivity, high accuracy measurement applications). | |||||
| Filter function | A low-pass filter can be inserted into the ammeter measurement circuit. *2 | |||||
*1 If there is a possibility that the EUT or tools and the like will be grounded or if you are uncertain, do not set GND to Guard. Doing so is extremely dangerous because the ammeter will be shorted and will not be able to measure current. For normal applications, set GND to Low. *2 When the low pass filter is on, a judgment delay of at least 5 seconds and a test time are required.
