I have listed the specs below for the 5000 series.-±50 mV to ±20 V ranges, 12-bit mode or greater ±0.25% typical @ 25°C (±1% of full scale max @ 20 to 30°C)
±50 mV to ±20 V ranges, 8-bit mode ±1% typical @ 25°C (±3% of full scale max @ 20 to 30°C)
±10 mV and ±20 mV ranges ±2% typical @ 25°C (±5% of full scale max @ 20 to 30°C)
If you are measuring around 50mV dc the best settings would be use the +-100mV range
. And the resolution to 12-bits or greater.
So +-100mV - 200mV x 2.5% = +-0.5mV (typical at 25C)
And at 1%- 200mV x 1% = +-2mV (20C-30C)
If you are measuring less than 50mV, then use the +-50mV range
+-50mV - 100mV x 2.5% = +-0.25mV (typical at 25C)
1%- 100mV x 1% = +-1mV (20C-30C)
So if you measured 50mV on the +-100mV range the you would quote the measurement as 50mV +-0.5mV
The actual value could be from 49.5mV to 50.5mVOther tips to help
- I would also increase the resolution to 16-bits or the highness allowable, depending on the number of channels enabled.
- Also leave the scope running for 20 minutes for the internal temperature to become stable, for best results. And try to use the scope in a room temperature of 25 degrees Celsius.
- Then zero the channel(s) before start your measurements, to remove any DC offset, from the channel.