A multimeter allows the user to test for continuity, resistance and voltage to determine whether or not an electronic component is functioning properly. The Digitor multimeter offers a number of unique features including a transistor and diode testing mode. While the Digitor multimeter has few controls, they can be difficult to master if the proper combination of controls are not set correctly. Use a few simple steps to set a multimeter up for reading millivolts.
Insert a new battery into the multimeter. A Digitor multimeter uses a 9-volt battery as its power source. Old batteries can cause inaccurate readings. Remove the battery compartment's cover. The cover is held in place by either a snap-on tab or with two set screws. Use a small Phillips head screwdriver to remove the set screws. Carefully remove the battery and replace it. Place the cover back on the multimeter.
Turn the multimeter on. The power switch for most models is built into the large dial that controls the testing range. After powering the meter on, allow at least 60 seconds for the meter to set itself. Many of these devices run a diagnostic program when they are turned on which calibrates and sets the various testing modes.
Check the output screen. If there are any problems, such as a low battery, they will appear on the digital readout screen. If the meter is functioning correctly, "0.00" or a similar numerical configuration will appear on the readout screen.
Set the multimeter for millivolts. The multimeter's dial is normally divided into three or four primary ranges that include volts, ohms and amps. Within the volt settings, on the upper right-hand side of the dial, are a series of numbers with a small "m" next to them. The "m" denotes millivolts. Turn the dial until it is setting on the highest of the millivolt settings.
Connect the leads to the multimeter. The red lead goes into the jack marked "V(ohm)ma." The back lead goes into the jack marked "COM." Do not place the red lead into the jack designated for DC. The Digitor multimeter's lead jacks are on the bottom of the meter.
Attach the lead to the device being tested. Use alligator clips to hold the metal tips of the leads to the device being tested. If the device being tested is small, keep the clips from touching one another which will cause the meter's reading to be corrupted.
Adjust the millivolt settings. The Digitor multimeter has a millivolt range of 200mV to 2000mV. It is important to know the correct voltage loads used by the device being tested. Refer to a user manual, an electronics book for individual electronics parts or an online electronics website for this information. If unsure of voltage, start with the highest setting and work down to the lowest setting.
Test the device. Check the reading on the meter's readout screen with the correct voltage load according to the research done in the previous step.
Only work on devices that have been unplugged from the wall outlet.