| Electronics > Beginners |
| When do u need a bench multimeter ? |
| << < (7/8) > >> |
| MosherIV:
--- Quote ---Gossen Metrawatt make a handheld meter that does 6.5 digits. It's called Metrahit 30M, if you're interested. The precision, though, leave some to be desired. --- End quote --- Good to know, thanks for letting me know and not being rude about it :) Yes, anything with that kind of precision needs stability, thermal stability which will be near impossible to achieve in a hand held. |
| Dave:
--- Quote from: MosherIV on April 21, 2018, 11:35:35 pm --- --- Quote ---Gossen Metrawatt make a handheld meter that does 6.5 digits. It's called Metrahit 30M, if you're interested. The precision, though, leave some to be desired. --- End quote --- Good to know, thanks for letting me know and not being rude about it :) Yes, anything with that kind of precision needs stability, thermal stability which will be near impossible to achieve in a hand held. --- End quote --- Yup, you want a heated zener reference for that kind of stability and you want to leave it on for an hour or two before measuring something. Not the most battery-friendly requirements, if you ask me. |
| AlfBaz:
Aside from what has already being mentioned there is also increased functionality built in with respect to data such as statistics, filtering, pass/fail test with indication via an output, external triggering and a host of other mathematical functions. Most modern bench meters have trend plots as well, which can be zoomed in bringing us greater data storage and the capability to extract it for analysis on a PC |
| Cerebus:
--- Quote from: Dave on April 21, 2018, 11:46:47 pm ---Yup, you want a heated zener reference for that kind of stability and you want to leave it on for an hour or two before measuring something. Not the most battery-friendly requirements, if you ask me. --- End quote --- The LM399 datasheet claims that it can be used in battery powered sources, i.e. it can achieve good accuracy shortly after being turned on. Quite how much salt one should take with that claim is another question, but it might offer a fair compromise if one really wanted that degree of temperature stability in a handheld. Of course the battery pack you'd have to lug around for any decent working time might not be exactly handheld. |
| james_s:
It's rare that you *need* a bench meter, although at the very top end you can get more features and better performance in a bench meter, handhelds have caught up with all but the higher end bench meters. 30-40 years ago there was no contest, bench meters then offered much better performance and more features than most handhelds. One significant remaining advantage is they don't run off batteries so you can leave them on for long periods without draining the battery or auto shutoff. Oh and if you need GPIB or network connectivity for taking automated measurements few if any handhelds offer that. |
| Navigation |
| Message Index |
| Next page |
| Previous page |