I'm on the tail end of a recent heat wave, so it's been a bit toasty in the lab the past few days. Fortunately, today's been a bit better and, from the two-hour period I was logging the reference, stable as far as temperature and humidity.
It's funny that you can see when I was in the lab to start and restart the logging each hour (BenchVue log timeout). I add to the humidity and lower the room's temperature. Who'd a thunk it.
Question: How much of the resolution captured via GPIB is for real on these meters? For example, the raw data had values such as 10.0000512.
Surely, it can't do 8.5 digits even at 100 PLC. I formatted the stats below to 6.5 digits and added one extra decade for the standard deviation (so it wouldn't be zero).
Here are some stats (second hour only) and graphs from today's logging. I'll upload raw data to the xdev's share.
34401ARange | 10VDC |
NPLC | 100 |
Average | 10.00028 |
Std Dev | 0.000003 |
Min | 10.00027 |
Max | 10.00029 |
34410ARange | 10VDC |
NPLC | 100 |
Average | 10.00005 |
Std Dev | 0.000003 |
Min | 10.00004 |
Max | 10.00006 |
AttachmentsT&H-Hour1&2.png: Temperature and humidity during the two-hour duration. Captured from the TI dongle and logged via EZGPIB.
34401A-Hour1.png: First hour of logging the 10V reference via 34401A.
34401A-Hour2.png: Second hour of logging the 10V reference via 34401A.
34410A-Hour1.png: First hour of logging the 10V reference via 34410A.
34410A-Hour2.png: Second hour of logging the 10V reference via 34410A.
34401A-34410A-10VDC.jpg: DMMs at work.