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Connections to Mastercraft Digital Multimeter

I have a meter and lost the instructions. I do not know what hole to plug in the red and black wire. There are three holes to choose from.

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The terminals are normally marked common (com) black lead (ohm) for resistance checks red lead and v.amp. for voltage and current red lead hope this helps

Posted on Apr 19, 2009

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How to set up and check the digitech qm1548 multimeter and tell me how to check a 12volt truck battery


put the black wire in the black hole , the red wire in the red hole
turn the knob( press the buttons ) to volts ad/dc adjust range to high voltage ( put the decimal point 3 places to the right on the screen
connect the black wire to the negative pole of the battery
put the red wire to the positive pole of the battery and read the dial /screen
the reading on a good battery will be 12 volts to 13.5 volts
now have some one start the engine
check the voltage while cranking-- should be no less than 10.5 volts ( anything less indicates a faulty battery)
once the engine is running increase rpms to around 2500 rpms
battery voltage should now read 14.5-14.8 volts
if it stays at 12 volts , the alternator / regulator is not working
if the running engine voltage is at 11 volts , the battery is supplying power to the electronics
Of course if you do not know how to read a multimeter or know how to follow the user instructions for the meter, what I have detailed here will not mean much , so take the vehicle to an accredited auto electrician and have a proper diagnosis done

Aug 22, 2016 | The Music

1 Answer

How do i use a multimeter


Black lead connector is the Neg. or the common, seems, goes in the bottom most socket on your meter and the red one on the very top one. Not the one marked for Amps. Then test the meter for working, turn the dial on the multimeter to resistance X1 or X100, with the meter on, touch the probes together to see meter deflection.
Make sure you put the meter on to volts after this to test voltage AC or DC.
Omar

Jul 20, 2014 | Cars & Trucks

1 Answer

L100 desktop


Lost a power cable?

Like it was walking down the street one day, and the power cable fell out of it's pocket?

Or do you mean came loose?

Or in YOUR estimate, that one power cable coming from the Power Supply, is bad?

The first one I was trying to be funny.
I'm serious about the last two.

http://www.geeks.com/details.asp?invtid=ASL100-UA380A-R

Hmmm, okay let's try this another way,

(Notice I didn't even go to Acer Support. With the info they give the consumer, it isn't worth the trouble. Also tells you a lot about this computer company.........)

http://www.ebay.com/itm/Acer-Aspire-L100-Motherboard-MB-S6909-003-MBS6909003-/120919471509?pt=Motherboards&hash=item1c275cb595

Oh, I see................

http://www.amazon.com/Acer-Power-Aspire-Adapter-Supply/dp/B004PYZSCC

I just got schooled.

Don't believe there are any power wires inside to connect, Christina.
Power is from an external power supply, that plugs into the computer.
(Like a laptop)

The only wires in my estimate, is;
A) The small audio wire from the optical drive (CD/DVD drive) to the motherboard, (Close to the Blue VGA port)

B) The Front Panel wires,

C) USB Front Panel port wires to motherboard

D) Media Card Reader wires to motherboard

E) Harddrive and optical drive data cables to motherboard. (One each)

(The front of your computer is the Front Panel)

Computer not coming on?
See if the external power supply is good.

Voltage coming out is supposed to be 19 Volts DC.

The plug end on the external power supply;

The center hole is the Positive ( + ) connection.
The cylindrical metal shell on the outside, is the Negative ( - ) connection.

Multimeter positive ( Red) probe lead goes to center hole.
Negative ( Black ) probe lead touches outside cylindrical metal shell.

Multimeter positive (Red) probe lead, plugs into red hole on multimeter, marked DCV.
Negative (Black) probe lead only has one hole (Black), to plug into.

Function knob is set to DC Voltage. DCV.
If just a symbol, the symbol is a dotted line over a solid line.
If more than one scale, set it to the 0-50 Volt scale.
(0 to 50 Volts ]

An economical multimeter is about $5 to $12.
Auto parts stores have them. (Although probably more expensive)
I have seen them on checkout aisle racks, at major discount stores.

While checking the AC adapter, have an assistant gently wiggle the cable, from the AC adapter TO laptop.
See if the reading on the multimeter fluctuates. If so you have a broken wire in that cable.

Have the assistant also gently wiggle the power cord.

Or take down to nearest 'Mom and Pop' computer shop, (Small store), and have the resident tech check it for a few bucks

Could also be the Power On switch.
This is located inside the plastic assembly, of the power on button.
They go bad, and do not leave a forwarding address ;)

Post back in a Comment.

Regards,
joecoolvette

Mar 18, 2013 | Acer Aspire L100 PC Desktop

1 Answer

I have proform smell of rubber buring when walk on


Dear Sir:

Thank you by your request, I will help you inmediately.

How to measure FUSEAND CONTINUITY A digitalmultimeter is the ideal multimeter t use to check fuses. You can test afuse using either a digital volt-ohmmeter or an analog volt-ohmmeter. Thedigital multimeter uses a LCD to indicate the condition of the fuse under testwhile an analog meter uses a traditional meter movement to indicate the fusecondition. Difficulty: EasyInstructions
Things You'll Need
  • Digital multimeter or analog multimeter
1. Usinga digital multimeter
o 1 Connectthe test leads to the volt-ohmmeter. Plug the black test leads into the blackjack marked "Com" or "Common" on the front of the meter.Plug the red test lead into the red jack marked "Volts/Ohms" on thefront of the meter. o 2 Setthe meter's function switch to "Ohms" and the range switch to the"R x 1" scale. If your digital multimeter is an auto ranging meter,you will not have a range switch. Instead, you'll have just a function switchbecause the meter will automatically select the right range for the quantitythat you are measuring. o 3 Turnoff the power and remove the fuse to be tested from the circuit. Never test afuse for continuity while it is still connected to the circuit that it is usedto protect. If the circuit still has voltage, the meter will be irreparablydamaged. If the fuse is still in the circuit when tested it is possible to geta false indication that the fuse is good if the meter gets a completed circuitthrough other circuit components. To be safe, always remove the fuse from thecircuit before testing it. o 4 Touchthe black test probe to one end of the fuse and the red test probe to the otherend of the fuse. It does not matter which probe you touch to which end becausefuses are not polarized. You are checking to see if there is continuity throughthe fuse element. A reading of approximately 0.5 on a digital meter's LCDindicates a good fuse. Most digital meters read their own internal fusesresistance, hence 0.5 Ohms and not 0.00 Ohms. LCD readout of "O.L."indicates no continuity through the fuse. The fuse is bad and needs to bereplaced.

Thank you in advance sincerely. God bless you.

If you need further assistance, please contact me.

E.CUADRA
MANAGUA, NICARAGUA.

Sep 29, 2011 | Exercise & Fitness

1 Answer

No power comming on tredmill what can it be


Dear Sir:

Thank you by you request , I will help you right now:

How to measure FUSEAND CONTINUITY A digitalmultimeter is the ideal multimeter t use to check fuses. You can test afuse using either a digital volt-ohmmeter or an analog volt-ohmmeter. Thedigital multimeter uses a LCD to indicate the condition of the fuse under testwhile an analog meter uses a traditional meter movement to indicate the fusecondition. Difficulty: EasyInstructions
Things You'll Need
  • Digital multimeter or analog multimeter
1. Usinga digital multimeter
o 1 Connectthe test leads to the volt-ohmmeter. Plug the black test leads into the blackjack marked "Com" or "Common" on the front of the meter.Plug the red test lead into the red jack marked "Volts/Ohms" on thefront of the meter. o 2 Setthe meter's function switch to "Ohms" and the range switch to the"R x 1" scale. If your digital multimeter is an auto ranging meter,you will not have a range switch. Instead, you'll have just a function switchbecause the meter will automatically select the right range for the quantitythat you are measuring. o 3 Turnoff the power and remove the fuse to be tested from the circuit. Never test afuse for continuity while it is still connected to the circuit that it is usedto protect. If the circuit still has voltage, the meter will be irreparablydamaged. If the fuse is still in the circuit when tested it is possible to geta false indication that the fuse is good if the meter gets a completed circuitthrough other circuit components. To be safe, always remove the fuse from thecircuit before testing it. o 4 Touchthe black test probe to one end of the fuse and the red test probe to the otherend of the fuse. It does not matter which probe you touch to which end becausefuses are not polarized. You are checking to see if there is continuity throughthe fuse element. A reading of approximately 0.5 on a digital meter's LCDindicates a good fuse. Most digital meters read their own internal fusesresistance, hence 0.5 Ohms and not 0.00 Ohms. LCD readout of "O.L."indicates no continuity through the fuse. The fuse is bad and needs to bereplaced.
Thank you in advance, sincerely. God bless you.

If you need further assistance, please contact me.

E.CUADRA
MANAGUA, NICARAGUA. C.A

Sep 29, 2011 | Life Fitness 9500HR Next Generation...

1 Answer

I have a Vision Fitness T9450 HRT everything works including the incline when i turn it on but the treadmill will not run, is this a motor problem? or is it a fuse? how can i check ?


Dear Sir:

Hello I hope that everything is o.k

Now I will help you, only thing is you need to know how to handle the DVOM(digital Voltimeter)


To use these instructions, you need to have a familiarity with electricity and a working knowledge of a voltage multimeter. With all of
these tests, USE EXTREME CAUTION!!! Never let the voltage ground directly to any part of the treadmill or your leads ground while you
are testing voltage.
To begin, set your volt meter to AC volts. We are going to trace the power from the wall outlet through the
treadmill to see where it ends.
With the treadmill unplugged, test the wall outlet. You should have from 115 to 125 VAC. Optimally, you will
have at least 120 VAC.
Follow the power leads from the power cord to the lead ends. With the treadmill unplugged, connect your
meter to the lead ends. Plug the treadmill in and check your reading. It should be the same as your reading
from the wall outlet.
Continue this process with the electrical system, following the leads, as they pass through, breakers, fuses,
and the like.
Where the power flow ends is where your problem is. Sometimes it will be in a bad connection, sometimes
it will be in a shorted breaker or blown fuse, at times it may be as simple as a safety switch not working
properly, or it may be a major problem with a component.
In some cases, components work in tandem (i.e.- a controller may need a signal from the console
computer to release voltage to the motor) so if you have a question concerning where voltage ends, email
us at doc@treadmilldoctor.com.
TESTING FUSES, BREAKERS, WIRING, AND SWITCHES
1) One of the most common problems with power outages is problems with fuses, breakers, wiring, or switches.
2) If your treadmill is equipped with a safety switch, set your volt meter to continuity. Touch your test leads together to make sure you
are getting a closed circuit. With the treadmill unplugged, back the leads off the safety switch, usually near the upper display computer.
With the safety key out, test the switch. It should be open. Push the safety key in. Your circuit should be closed. If this tests ok, move to
the next step.
3) While testing for voltage, you can unplug your treadmill and test the fuses, breakers, and wiring harnesses. Sometimes a breaker may
have shorted open and not tripped. Test these components individually. You want a closed circuit on all of them

instructions Things You'll Need
  • Digital multimeter or analog multimeter
  1. Using a digital multimeter
    • 1 Connect the test leads to the volt-ohmmeter. Plug the black test leads into the black jack marked "Com" or "Common" on the front of the meter. Plug the red test lead into the red jack marked "Volts/Ohms" on the front of the meter.
    • 2 Set the meter's function switch to "Ohms" and the range switch to the "R x 1" scale. If your digital multimeter is an auto ranging meter, you will not have a range switch. Instead, you'll have just a function switch because the meter will automatically select the right range for the quantity that you are measuring.
    • 3 Turn off the power and remove the fuse to be tested from the circuit. Never test a fuse for continuity while it is still connected to the circuit that it is used to protect. If the circuit still has voltage, the meter will be irreparably damaged. If the fuse is still in the circuit when tested it is possible to get a false indication that the fuse is good if the meter gets a completed circuit through other circuit components. To be safe, always remove the fuse from the circuit before testing it.
    • 4 Touch the black test probe to one end of the fuse and the red test probe to the other end of the fuse. It does not matter which probe you touch to which end because fuses are not polarized. You are checking to see if there is continuity through the fuse element. A reading of approximately 0.5 on a digital meter's LCD indicates a good fuse. Most digital meters read their own internal fuses resistance, hence 0.5 Ohms and not 0.00 Ohms. LCD readout of "O.L." indicates no continuity through the fuse. The fuse is bad and needs to be replaced

Thank you in advance, best regard. Blessing.

If you need additional Help, please contact me.

E.CUADRA
MANAGUA, NICARAGUA. C.A.

Sep 28, 2011 | Dmm Vision Fitness T9500 Treadmill

1 Answer

I have a Schwin 5450P treadmill & I lost the manual. After it has been unplugged & plugged back in, the panel is black like there isn't any power & it buzzes until you pull the emergency...


Dear Sir:

Hello I hope everything is fine.

I will try to help you inmediately.

1) Go to the next web page inmediately for to find you manua.

www.fitnessrepairparts.com

They are specialed in Parts +Manuals for every Machine Fitness, of course you must paid some Fee for to buy the Manual. Go ahead.

2) About your electrical problem do the following. a) Go to Circuit Breaker from the Panel House, and reset. b) Now prove again. c) If the problem persist go and check with DVOM (Digital Voltmeter and test for continuity the wire from Power Cord( repair or replace the same) .d) Test the circuit breaker from the machine and reset and Prove Now. e) Test the fuse with the DVOM( I am attached the description how to measure Fuse and Wiring with DVOM) and Go ahead.

1. Usinga digital multimeter
o 1 Connectthe test leads to the volt-ohmmeter. Plug the black test leads into the blackjack marked "Com" or "Common" on the front of the meter. Plugthe red test lead into the red jack marked "Volts/Ohms" on the frontof the meter. o 2 Setthe meter's function switch to "Ohms" and the range switch to the"R x 1" scale. If your digital multimeter is an auto ranging meter,you will not have a range switch. Instead, you'll have just a function switchbecause the meter will automatically select the right range for the quantitythat you are measuring. o 3 Turnoff the power and remove the fuse to be tested from the circuit. Never test afuse for continuity while it is still connected to the circuit that it is usedto protect. If the circuit still has voltage, the meter will be irreparablydamaged. If the fuse is still in the circuit when tested it is possible to geta false indication that the fuse is good if the meter gets a completed circuitthrough other circuit components. To be safe, always remove the fuse from thecircuit before testing it. o 4 Touchthe black test probe to one end of the fuse and the red test probe to the otherend of the fuse. It does not matter which probe you touch to which end becausefuses are not polarized. You are checking to see if there is continuity throughthe fuse element. A reading of approximately 0.5 on a digital meter's LCDindicates a good fuse. Most digital meters read their own internal fusesresistance, hence 0.5 Ohms and not 0.00 Ohms. LCD readout of "O.L."indicates no continuity through the fuse. The fuse is bad and needs to bereplaced.
Thank you in advance, sincerely. God bless you.
If you need additional Help, please reach me.
E.CUADRA MANAGUA, NICARAGUA. C.A.

Sep 28, 2011 | Exercise & Fitness

1 Answer

Tranium Treadmill will not shut off unless I unplug it.


Dear Sir:

Thank you by you request, I will help you right now.

ercupa190_9.jpg How to measure FUSEAND CONTINUITY A digitalmultimeter is the ideal multimeter t use to check fuses. You can test afuse using either a digital volt-ohmmeter or an analog volt-ohmmeter. Thedigital multimeter uses a LCD to indicate the condition of the fuse under testwhile an analog meter uses a traditional meter movement to indicate the fusecondition. Difficulty: EasyInstructions
Things You'll Need
  • Digital multimeter or analog multimeter
1. Usinga digital multimeter
o 1 Connectthe test leads to the volt-ohmmeter. Plug the black test leads into the blackjack marked "Com" or "Common" on the front of the meter.Plug the red test lead into the red jack marked "Volts/Ohms" on thefront of the meter. o 2 Setthe meter's function switch to "Ohms" and the range switch to the"R x 1" scale. If your digital multimeter is an auto ranging meter,you will not have a range switch. Instead, you'll have just a function switchbecause the meter will automatically select the right range for the quantitythat you are measuring. o 3 Turnoff the power and remove the fuse to be tested from the circuit. Never test afuse for continuity while it is still connected to the circuit that it is usedto protect. If the circuit still has voltage, the meter will be irreparablydamaged. If the fuse is still in the circuit when tested it is possible to geta false indication that the fuse is good if the meter gets a completed circuitthrough other circuit components. To be safe, always remove the fuse from thecircuit before testing it. o 4 Touchthe black test probe to one end of the fuse and the red test probe to the otherend of the fuse. It does not matter which probe you touch to which end becausefuses are not polarized. You are checking to see if there is continuity throughthe fuse element. A reading of approximately 0.5 on a digital meter's LCDindicates a good fuse. Most digital meters read their own internal fusesresistance, hence 0.5 Ohms and not 0.00 Ohms. LCD readout of "O.L."indicates no continuity through the fuse. The fuse is bad and needs to bereplaced.
Thank you in advance, sincerely. God bless you

If you need further assistance, please contact me.

E.CUADRA
MANAGUA, NICARAGUA. C.A

Sep 27, 2011 | Exercise & Fitness

2 Answers

Mastercraft multimeter manul.... need instructions onhow to use the tool. e.g: need to check a 9V battery. what settings do i select on the meter. please direct me to where I can find a manual online.......


you just turn the switch to "V'' and it should be DC voltage.... then connect probes of multi meter to both terminals of battery and you will get to know about its voltage...

Mar 10, 2011 | Measuring Tools & Sensors

1 Answer

How do I set digital multimeter to measure resistance


plug black lead into bottom socket. Red lead goes into middle socket.
Select the Ohms range on the dial... the lower left section ... Denoted by a Greek letter Omega (Upside down horseshoe)
set the range on the dial (This meter goes from 200 to 2000K ohms)
and read away....

Sep 06, 2010 | Actron Digital Multimeter Tester

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