Author Topic: RS Pro RS-14 DMM oddities with low battery.  (Read 291 times)

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Offline mendip_discoveryTopic starter

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RS Pro RS-14 DMM oddities with low battery.
« on: June 26, 2023, 05:05:21 pm »
So today I have mostly been calibrating the RS-14 DMMs and let's just say they are not the best but for a cheap general purpose meter they do.

Now one thing I had a few times was that the meter would give me some rather shocking readings. 100 mV AC would show as almost 200 mV. I was about to say this meter is a little out then I remembered this has happened before with cheap meters. Put in a new 9 V battery and it's back to where it should be.

What I thought was odd was there was no warning from the meter that the battery was low. I measured one of the batteries at 8.7V.

Something to keep an eye on if you have odd readings.

Laugh of the day was a gentleman being very fussy about me calibrating this thermometer ASAP as he is using it and I might mess up his test if I don't get it back. Well I went to my bench and turned it on, flat battery. Well he managed to get the 9V down to 1.1V and when I asked for a new battery he sheepishly disappeared as everyone stated to take the piss.
Motorcyclist, Nerd, and I work in a Calibration Lab :-)
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So everyone is clear, Calibration = Taking Measurement against a known source, Verification = Checking Calibration against Specification, Adjustment = Adjusting the unit to be within specifications.
 


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