Arcade Collecting > Miscellaneous Arcade Talk

How to use a multimeter to troubleshoot

<< < (8/9) > >>

ChadTower:

Here's a great site on the basics of digital circuits... ties right in with using your DMM to explore them.

venkman:
thanks for this guide  :applaud:

mvsfan:
ive got a good question on multimeters. why do they seem to be one of the only devices that i own that dont have a snap off battery cap? youve either got to take the whole damn thing apart or it has a battery door with 2-4 screws that you have to remove to replace the battery.

this is a simple detail thats highly annoying to me. Its not a big deal but it just seems to me that every single worthless Billy Mays product that my grandma gladly buys always has a snap on battery door.

these morons on the other hand who sell multimeters are in the business of selling electrical testing equipment and they cant get that simple fact right.

Level42:
Having to unscrew the battery compartment of a quality multimeter is  a safety measure. Depending on the schematics, the battery contact can have connection to a test lead. So there is a risk of electrical shock if you touch it while the multimeter leads are still connected to some dangerous voltage. The screws prevent the compartment from accidentally becoming open in normal operation. And they serve as a hurdle hopefully making you think twice when you intentionally change the battery.

channelmaniac:

--- Quote from: Level42 on August 20, 2009, 07:58:25 am ---Having to unscrew the battery compartment of a quality multimeter is  a safety measure. Depending on the schematics, the battery contact can have connection to a test lead. So there is a risk of electrical shock if you touch it while the multimeter leads are still connected to some dangerous voltage. The screws prevent the compartment from accidentally becoming open in normal operation. And they serve as a hurdle hopefully making you think twice when you intentionally change the battery.

--- End quote ---

The screw on back also stays on the meter when it is dropped.

Note, I said "when it is", not "if it is"... all meters will be dropped eventually, and likely way more than once. ;)

Navigation

[0] Message Index

[#] Next page

[*] Previous page