There is no USPS pickup on Monday Feb 15th, 2016 because of President's Day. USPS orders placed after 11am EST Fri February 12th will go out Tuesday February 16. UPS orders will ship as normal.

strange readings from mini 3 wire volt meter (id 705)
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

strange readings from mini 3 wire volt meter (id 705)

by iotium on Wed Dec 05, 2012 7:33 pm

I'm getting some strange readings from a mini 3 wire volt meter. I was using it for a project I'm working on and it seemed fine at first. Then the voltages it was displaying seemed very high, so I did a test: I hooked it up directly to a single 8.4 V power supply with nothing else connected.

When I connect the test voltage lead to the PS ground, it reads 21.9 volts. When I connect the test voltage lead to the 8.4 V line, the voltage goes above 99.9 V and the display just says " - - ". When I don't connect the voltage test lead to anything, it goes to about 45 V. I checked all of these voltages with a DMM and I got the expected values: 0 V and 8.4 V.

I have it wired as per directions in a different thread: black wire to ground, red to positive supply, and white is the test voltage lead.

Any advice would be appreciated.
iotium
 
Posts: 3
Joined: Mon Nov 26, 2012 10:28 pm

Re: strange readings from mini 3 wire volt meter (id 705)

by adafruit_support_bill on Thu Dec 06, 2012 6:58 am

it seemed fine at first. Then the voltages it was displaying seemed very high

So it was giving reasonable readings when first wired up?

adafruit_support_bill
 
Posts: 45806
Joined: Sat Feb 07, 2009 10:11 am

Re: strange readings from mini 3 wire volt meter (id 705)

by iotium on Thu Dec 06, 2012 1:59 pm

That's right. I used it for about 5 days and it was working fine. It was powered from a 6 V supply and correctly measured voltages from 0 to 35 V.
iotium
 
Posts: 3
Joined: Mon Nov 26, 2012 10:28 pm

Re: strange readings from mini 3 wire volt meter (id 705)

by adafruit_support_bill on Thu Dec 06, 2012 2:05 pm

OK. Contact support@adafruit.com with a link to this thread to arrange for a replacement.

adafruit_support_bill
 
Posts: 45806
Joined: Sat Feb 07, 2009 10:11 am

Please be positive and constructive with your questions and comments.


cron