Multimeter problem..
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Multimeter problem..
02-02-2011 11:40 PM
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While I know there's usually a small tolerance this much can't be right? When trying to measure 3 of them (4.5V) I get over 5V. Obviously this isn't very constructive and is making some of my measurements a bit annoying.
At first I wondered if the battery was flat - IE maybe there could be a potential difference issue or a point of reference being out a bit but the low battery indicator hasn't appeared so it can't be.
I've not got any other batteries to test it against.. only the car - which measures 13.2V.
It used to be very accurate many moons ago (I've had it 11 years).. maybe it just time to replace it but any ideas just in case?
Re: Multimeter problem..
02-02-2011 11:44 PM
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More like 1·4 for a rechargeable just off charge, dropping to 1·3 after a few hours.
Zen FTTC 40/10 + Digital Voice FRITZ!Box 7530
BT technician (Retired)
Re: Multimeter problem..
02-02-2011 11:59 PM
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Yes, they're alkaline Energizers. That would explain it then.. maybe the meter is ok?
I was rather worried when I saw it reading 9.6V for all of them in series..
Re: Multimeter problem..
03-02-2011 12:05 AM
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Zen FTTC 40/10 + Digital Voice FRITZ!Box 7530
BT technician (Retired)
Re: Multimeter problem..
03-02-2011 12:11 AM
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Cheers pal
Re: Multimeter problem..
03-02-2011 1:54 PM
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If they've otherwise been well treated, it seems to be the LCD display which is most prone to failure. I suspect that otherwise the main reasons for early demise are rough handling or being dropped, frying by using the wrong range, or simply getting lost.
Zen FTTC 40/10 + Digital Voice FRITZ!Box 7530
BT technician (Retired)
Re: Multimeter problem..
03-02-2011 2:01 PM
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To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine
Re: Multimeter problem..
03-02-2011 2:12 PM
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look in this section, items 3 and 4
Table of Contents
1. Definitions
2. Battery Parameters
3. Primary Batteries (disposable)
1. Leclanché Cells
2. Alkaline Cells
3. Mercury Oxide Cells
4. Zinc/Air Cells
5. Aluminum/Air Cells
6. Lithium Cells
7. Lithium Iron Primary
8. Magnesium-Copper Chloride Reserve
4. Secondary Batteries (rechargable)
1. Lead–Acid Cells
2. Nickel/Hydrogen Cells
3. Nickel/Cadmium Cells
4. Nickel/Metal Hydride Cells
5. Sodium/Sulfur Cells
6. Nickel/Sodium Cells
7. Lithium Ion Cells
8. Manganese-Titanium (Lithium) Cells
9. Rechargeable Alkaline Manganese Cells
10. Nickel Zinc Cells
11. Iron Nickel Cells
12. Iron Air Cells
13. Iron Silver Cells
14. Redox (Liquid Electrode) Cells
Re: Multimeter problem..
03-02-2011 3:23 PM
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Quote from: 4C Yup, sounds OK. Digital meters generally either work or they don't.
Not true they can still go out of calibration.
Quote from: 4C I suspect that otherwise the main reasons for early demise are rough handling or being dropped, frying by using the wrong range
Not aware of any digital meter being fried by selecting the wrong range in more years than I care to remember working in electronics and telecommunications along side same pretty dumb technicians. Only fuses be blown when measuring high currents as the technicians have not used the correct inputs.
Re: Multimeter problem..
03-02-2011 4:09 PM
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Point taken re rarity of frying.
Zen FTTC 40/10 + Digital Voice FRITZ!Box 7530
BT technician (Retired)
Re: Multimeter problem..
03-02-2011 4:45 PM
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Re: Multimeter problem..
03-02-2011 7:34 PM
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Quote from: colintivy I still have a Pullen series 100 multimeter of 1947 vintage and its 1.5 volt U2 battery for resistance measurement, price 4d still works!!
Wow! Thats very impressive!
@pierre: Thanks for the link
Re: Multimeter problem..
07-02-2011 3:44 PM
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Re: Multimeter problem..
07-02-2011 4:17 PM
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Re: Multimeter problem..
08-02-2011 10:26 AM
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