Klein Tools CL390 Multitool - DrB DIY 

Cool beans, glad it helped. I use the tool regularly.

Thanks for the info

Glad it helped!

You bet!

Enjoy! I use mine regularly. Thanks for the Hz tip.

Ha! I just saw you do that at the last second! 🤦‍♂️😂

Yes! SEL / NCV BUTTON (FOR NCV TESTING) Press and hold the SEL/NCV button 12 to enter Non-contact Voltage Testing (NCV) mode to test for presence of AC voltage. The NCV icon and "EF" will be present on the display. Approach the conductor under test leading with the sensing antenna 14 . In the presence of AC voltage, the red NCV light 13 will flash, audible signals (beeps) will sound, and dashes will appear on the display. As the NCV sensing antenna 14 approaches the voltage source, more dashes will be presented on the display and the frequency of the audible sound will increase. Release the SEL/NCV button to exit NCV testing mode NOTE: Only voltages of 40V AC or greater will be detected.

Great.

Any chance u know how to measure ohms with the clamps?

RESISTANCE MEASUREMENTS 1. Insert RED test lead into VΩµA jack 5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the Continuity/Resistance/Capacitance/Diode-Test setting. NOTE: The meter defaults to Continuity testing in this mode. Press the "SEL/NCV" button 12 repeatedly until the resistance icon appears on the display. 2. Remove power from circuit. 3. Measure resistance by connecting test leads to circuit. The meter will auto-range to display the measurement in the most appropriate range. NOTE: When in a Resistance setting and the test leads are open (not connected across a resistor), or when a failed resistor is under test, the display will indicate "OL" This is normal. DO NOT attempt to measure resistance on a live circuit

You're welcome!

Glad I could help!

You are welcome

Nice comments. Thanks for the feedback.

You must be in a professional Electrician/HVAC field to own all those meters. For a DIY guy, this should be the only meter ever needed for life.

Check this out ameliadanver.com/what-causes-a-ghost-voltage/

That's what the zero button is for.

I don't know. I didn''t see anything in the manual or on the unit

I was new, big reminder: Safety first. I am not an electrician but an IT guy and DIY. I have learned a lot though doing projects. This multi-tool is great. Once you practice using, following the video, and reading the little booklet, I expect it will suffice all your homeowner needs. You will always need AC checking for plugs. You can use DC to check batteries. The current checker is great and most regular mult-tools will not have that feature. You can press the button just to see if current is present. I use the thermometer occasionally. Lately I have been using the Amp meter to see why new freezer is running all of the time. It will be a good tool for you IMO.

You are welcome.

Way to go! I completely missed that holder. Good catch! Thanks.

I really used the current measuring aspect when I had problems with outdoor freezer running fan / compressor.

Maybe your unit is bad. However it is possible for battery to read lower if it is going bad or depleted.

Ha ha.

MaxMin is used to detect maximum and minimum readings where you may have variability in the readings for voltage, current, resistance, temperature, and DC μA. Lets just try to get variability in 120 V. Turn your Klein CL390 from Off to V. By default, it is Auto Volts shown on the screen. Insert your black/red probes into a power outlet, lets say 120V in the USA. You should see some reading like 119, 120, 121 etc. Now push MaxMin button. You will see a maximum reading that only updates if the tool sees a higher reading. Then push MaxMin again and you will see the minimum reading that the tool sees and will only change if it sees a smaller reading. Now push MaxMin a third time and you will see the difference (max - min) reading. So you are in MaxMin mode. If you press MaxMin again, it will just toggle between Max, Min, max-min. To get back to Auto V mode, just hold MaxMin for 2 seconds and you will see Auto again. Hope that helps.

Yes, used it several times. Also used it on whole house generator hookup. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-i0oKvtQ_IZU.html

"By default, the meter will automatically power OFF after 5 minutes of inactivity. If the meter automatically powers-OFF while in a measurement setting, press any button to power the meter ON, or rotate Function Selector 2 switch to OFF, then power ON the meter. To deactivate Auto-Power OFF functionality press and hold the "SEL/NCV" button 12 before powering ON from the OFF setting. When Auto-Power OFF is deactivated, the Auto-Power Off icon will not be visible in the display."

@@DrBDIY thanks a lot

Months later, mine seems to be within a degree compared to other thermometers.

I watched the video again and didn't hear audio problems. I was going to post the video again with louder audio. Time stamp ?

@@DrBDIY Probably just my phone. I'm sure it's fine on a computer

No, it's not your phone. The audio gain/amplitude was very low. I had to turn my volume all the way up. But, other than that, it was a good video.