Note: Duplicate of https://community.keysight.com/message/91866
What are the negative fluctuations that we expect with preferably the 34410A (or the 34401A) when we are in an open circuit or when a device is turned off for DC&AC Voltage&Current measurements?
I want to avoid the -0 issues with automated measurements, however I need to have a valid reason to put a negative value as a low limit.
| Measurement | Range | Accuracy | Math | Tolerance |
|---|---|---|---|---|
| DC Voltage | 100mV | 0.0050+0.0035 | 0.000035*0.1mV | 3.5 uV |
AC Voltage | 100mVrms | 0.5+0.03 | 0.0003*0.1mV | 30 uVrms |
| DC Current | 100uA | 0.05+0.025 | 0.00025*100uA | 0.025 uA?? |
| AC Current | 100uArms | 0.1+0.04 | 0.04*100uA | 0.04 uA?? |
If I consider full range for reading:
| Measurement | Range | Accuracy | Math | Tolerance |
|---|---|---|---|---|
| DC Voltage | 100mV | 0.0050+0.0035 | 0.000085*0.1mV | 8.5 uV |
AC Voltage | 100mVrms | 0.5+0.03 | 0.0053*0.1mV | 0.530 mVrms |
| DC Current | 100uA | 0.05+0.025 | 0.00075*100uA | 0.075 uA |
| AC Current | 100uArms | 0.1+0.04 | 0.14*100uA | 0.14 uA |
Can anyone confirm or correct? Especially for AC since the specs are for at least 0.3% of range and a frequency over 3Hz.
Thanks