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Checking batteries AA D cel with a sperry DM 350A digital multimeter

Where do I set the setting to check the batteries

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Dc .... no lower then the voltage range of the highest voltage of the battery.

Posted on Sep 14, 2008

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Why does my sperry DM6450 multimeter read "connect terminal" even when both are connected?


Are you connecting your leads to the proper terminals on the meter? There are, what, four of them? Easy to mix up.

If it still isn't working, then you might have a bad connector on your multimeter.

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This is the first time to use amultitester but i dont know how pls. give me an intructions


The dc setting is for checking like the battery voltage in your car the ac is for checking the power inside your house to see if you have 110 at the outlet.
DC setting can be used for testing flashlight batteries pen light batteries etc.

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Does the Sperry DM-350A test for continuity? I can't seem to find a setting that works.


yes. But you have to change the LEADS down below. One must connect into the Omega connection at the bottom (looks like an upside down horseshoe). And the meter setting is where the arrow (?) symbol is. Touch the two leads together and it should "zero out". Now you're ready to check continuity.

Dec 03, 2010 | Metal & Voltage Detectors

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Possible blown dryer thermal fuse


to check thermo fuse set digital meter to a low resistance setting typical 200 " omega symbol" on most digital meters the 200 setting also has an audio beep for continuity which means that if the fuse is good it will beep and also show on the display a zero out, and if fuse is bad there will be no beep and the display will show a 1. good luck.

Dec 31, 2009 | Actron Digital Multimeter Tester

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Only has a -1 on the display


Christoph, Likely you have the meter set to resistance (ohms) and thus, are getting the displayed reading you've described. Also, with the polarity reversed ( positive and negative + / - ) you'll get the negative number displayed in voltage settings.

First off, check to make sure that the battery inside the back of the test meter is new. If your meter has been around for some time, it is likely that the battery should be replaced. Typically it is either a AA or 9 volt battery in most testers.

Once you've replaced the battery, try testing the old battery with the meter set to DC-V and the probes (red & black) in the DC-V connections. Set the measurement scale to the lowest on the DC range and then with the red test lead on the battery's positive end and the black test lead on the battery's negative end, you should be able to get a voltage reading of the old battery.

Now you can check the resistance function (ohms) by setting the meter to the Ohms function at the lowest scale/setting and touch the two leads together. You should get a reading of 0.00 ohms resistance. You might have to zero the setting manually with either a small adjustment wheel on the face of the meter, or with a small set screw on the backside of the meter. (some models have this installed inside the battery compartment also)

Hopefully that's all the issue you've experienced and your meter is now working properly. I hope you find this Very Helpful and best regards!

Nov 02, 2009 | Actron CP7672 Digital Multitester

1 Answer

Checking batteries


I assume a "DM-350a" is some kind of a digital multimeter. I Googled and found it might be a "A.W. Sperry DM350A 5 Function 17 Range Digital Multimeter" and looking at the ranges available on that meter, you can't really thest the battery "under load" the only reasonable way to test small batteries. the DC current only goes up to 200 milli amperes. A "C" or "D" size flashlight battery puts out 1 to 4 amps depending on conditions. That's 5 to 20 times the current readable by that meter. The volts on one of those batteries is probably 1.6 volts to 1.3 volts etc. If you live in the United States, I'd say go to Radio Shack and spend $5 to $15 and buy a battery tester like "Enercell Analog 9-Range Battery Checker, $14.99, Model 22-156, catalog # 22-156"
Then you and anyone in your family can read the instructions and test 8 or 9 different type batteries. Battery types: 1.5V button-cells, "AAA"/"N"/"AA"/"C"/"D", 6V, 9V, 12V, 15V and 22.5V..
This is not supposed to be an advertizement, and I have no interest in RadioShack,... but it's supposed to be instructional.

Small price, Good instruction to anyone who can read, and if anyone forgets, they can re-read. Testing a lot of batteries in a sitting goes very fast with these.

Differently, with the sperry, or any voltmeter, you'd have to select a resistor small enough to draw the current, and large enough not to overheat or burn, connect it and measure the loaded voltage drop, compare the voltage and current of the loaded battery, and compare it to that of a new battery, and a battery you might consider too weak for your application.. Voltage equals amps times resistance, and power equals amps squared times resistance... Really, buy a battery tester.
Regards --- GooseBay_Camper

Sep 26, 2009 | Sperry Instruments HST401 Voltage...

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I just brought a sperry dm-350A to test the switches on my dryer I thought they would come with instructions on how to use it but it didn't. Is there a place where I can go and learn what the symbols...


Just got mine from home depot. Stick the black wire into the COM port and the red wire in the V port on the right. The red wire is the positive and the black is the ground. Touch the red tip to the positive and the black one to a ground. Turn the dial clockwise to the right and you are measuring your voltage(i left it on 200).

Jul 11, 2009 | Metal & Voltage Detectors

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