| Products > Test Equipment |
| LM399 Voltage Reference, Fluke 289, Gossen 29S, RM303, AN870 |
| << < (3/7) > >> |
| Trader:
--- Quote from: masterx81 on December 26, 2020, 12:35:14 pm ---Next step is at LTZ1000 🤦♂️🤣 --- End quote --- LTZ1000ACH ($200) WOW... some Voltages References are so expensive, maybe is better to buy a new BM869s ($212). |
| TiN:
0.5 ppm of what? I don't see any evidence to give thinking that reference was not calibrated correctly. Fluke and Gossen have very wide (compared to typical LM399) uncertainty, and their agreement don't mean anything much. They could be both off same way. Its like you trying to calibrate precision 10-digit frequency standard with handheld watch, counting seconds between readings.. If you like to play with metrology I can recommend getting PDVS2mini, its far more capable and useful thanks to adjustable output and Ian's traceable calibration. It also have better output terminals instead of bad SMA (for DC reference). |
| bdunham7:
Has anyone popped the can on one of these to see what is actually in there? Or how about a photo of the backside of the PCB board, which I notice none of the sellers post? |
| MikeLud:
--- Quote from: bdunham7 on December 27, 2020, 12:29:21 am ---Has anyone popped the can on one of these to see what is actually in there? Or how about a photo of the backside of the PCB board, which I notice none of the sellers post? --- End quote --- |
| Trader:
--- Quote from: TiN on December 26, 2020, 05:09:39 pm ---I don't see any evidence to give thinking that reference was not calibrated correctly. --- End quote --- I also don't see any evidence to give thinking that reference was calibrated correctly. 2 calibrated DMMs matched the measurements, someday I'll check the LM399 VR with a +6 1/2 digits DMM. |
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