| Products > Test Equipment |
| Handheld, fast DMM with manual range, constant backlight and no auto off exists? |
| << < (4/6) > >> |
| BILLPOD:
My (Uni-T), UT 890C has manual ranging 'only' and the Auto-off can be disabled :-DMM on turn-on. 6,000 count. Backlight lasts around 15 seconds and can't be disabled. And it is only around $35 USD. |
| LinuxHata:
I need auto off to be permanently disabled. Not to do additional work on each power on. And backlight should turn on, as multimeter is turned on and remain constant while it is on. |
| J-R:
Well, my 2 cents on this thread: From my tests, DMM backlights typically draw 2-4 times the current than the DMM itself. So it's questionable to want it to stay on so much. Also, it makes no sense to be working in the dark where you can't clearly see everything, such as what position the selector switch is in. LED lights/headlamps are cheap/easy to obtain. I have dozens of them all over the house/bench/garage/shop/backpack/cars. This place is my go-to for discounted lights: https://illumn.com Manual ranging only is also questionable due to the sheer amount of switching required. I have the Amprobe 30XR-A and it has 30 possible positions. A typical auto-ranging DMM locks the current range as soon as you press the range switch, so manual ranging is essentially dead, IMHO. |
| alm:
The thread is about executing a solution without stating the problem. Usually stating the problem will lead to more useful responses. But assuming the problem is continuously monitoring signals, I'd say bench meters from the era when manual ranging was still common enough to have dedicated buttons, like Keithley 175A or Fluke 8600A, are more likely to have the features you seek and higher quality than almost any meter that you buy new without auto ranging. Mains powered instruments are less concerned about power usage so are less likely to have features like auto power off. If the requirement for manual ranging is so the meter remembers range on reset, then some bench meters like Keithley 199 let you save the settings as power on default. |
| J-R:
Even on a manual ranging DMM you must select the range of interest, which I don't see as being much different than what is required on an auto-ranging DMM. Trying to understand a person's desires is maybe a dead end, and also sometimes people want what they want. Who are we to judge, haha! I really like the 121GW for battery life due to the 4xAA cells and frequently use it when I expect to have the backlight on a lot. Otherwise, I could also see modifying a cheap manual range DMM to always power the LCD backlight whenever it is on if there just was no other option. I also bought some Qi stuff to attempt adding the coils to various products and convert them to wireless + rechargeable, but time has not been on my side as of yet. My thought for some DMMs was convert to Li-ion and of course recharge only when powered off. |
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