PC-controlled multimeter

Jun 23, 2018 5 Replies

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Randy Day 8 years ago

I'm looking for recommendations on a computer-controlled multimeter to automate a test procedure. I'd like to be able to have the computer select voltage, resistance, etc., choose various ranges in each, and transmit readings to a PC.

I see a lot of units that communicate, but I'm unclear whether they allow functions and ranges to be set, or whether they just transmit results from the range selected on the front dial.

The one unusual requirement is a high resistance range (e.g.

2000Mohm). ACV/DCV/ohms ranges can otherwise be similar to regular handheld units.

Any suggestions?

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John Larkin 8 years ago

We use a lot of Keithley and Fluke benchtop DVMs in test sets, with ethernet or USB interface. They can set anything under remote control except for switching between the front and rear-panel inputs.

I prefer the Fluke 8845A. It's more stable at microvolt levels, does good AC measurements, and is EMI harder than the Keithleys.

It only measures 100M ohms max, but you could do some simple hack to measure gigohms.

There are cheap handhelds with interfaces, but the interface won't turn the big range knob.

There are also cheap benchtop DVMs, typically Chinese. Might be good enough.

John Larkin Highland Technology, Inc lunatic fringe electronics

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Peter Gierschner 8 years ago

Am 23.06.2018 um 19:22 schrieb Randy Day:

Here

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are some programs for UNI-T or similar multimeters.

peter

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John Robertson 8 years ago

Mooshimeter? Doesn't do resistance, but for remote monitoring of voltage and current it is handy...and perhaps the designer is interested in expanding it to resistance.

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Handy tool!

John :-#)#

(Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out."

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Randy Day 8 years ago

[snip]

Bookmarked, thanks!

Actually we have a Uni-T at the shop; can't remember the model number, though. Given the price of benchtop units that John mentioned, maybe I can run multiple cheap datalogger units switched in with relays; I wondered if there might be a low-cost all-in-one alternative I hadn't seen.

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Randy Day 8 years ago

[snip]

Wireless doesn't really offer an advantage in this instance, but it's an interesting device.

Thanks.

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