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Model #CL390

Store SKU #1005205510

400 Amp AC/DC Digital Clamp Meter, Auto-Ranging

$8997
  • Clamp Meter measures current, voltage, resistance and continuity
  • Digital Meter has auto-ranging TRMS technology for accuracy
  • Includes a carrying case, test leads, thermocouple, and batteries
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Product Overview

Klein Tools CL390 is an automatically ranging true root mean squared (TRMS) digital clamp meter that measures AC/DC current and NCVT via the clamp, AC/DC voltage, DC microamps, resistance, continuity, frequency, capacitance, and diodes via test leads, and temperature via a thermocouple probe. It features a high visibility, reverse contrast LCD display that optimizes view ability both in dark or bright ambient lighting.
  • Test lead holder on side of clamp and optional magnetic hanger for meter (Cat. Nos. 69445 or 69417) for hands free operation
  • Non-contact voltage tester integrated into the clamp jaw
  • High-visibility reverse contrast LCD display for improved view ability in all ambient lighting conditions
  • Automatically ranging True Root Mean Squared (TRMS) measurement technology for accuracy
  • Measures AC/DC current and NCVT via clamp and AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test, and continuity via test-leads, and temperature with thermocouple
  • Measures temperature with a K-Type thermocouple probe
  • Max/Min, Rel/Zero and Data Hold capability
  • Auto-power off after 10 minutes to conserve battery life
  • Includes a carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, instructions, and 3 x AAA batteries
  • Low battery indicator and easily accessible battery compartment
  • Built to withstand a 6.6-Foot (2 m) drop
  • CAT III 600V, Class 2, Double insulation safety rating
  • Meets requirements for use in basic and controlled electromagnetic environments like residential, office and light-industrial locations



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Additional Resources

From the Manufacturer

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Price
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$8997
$12900
$12997
$159.94
Save $29.97 (19%)
Ratings
(363)
(136)
(32)
(495)
Test Meter TypeClamp/MultimeterClamp/MultimeterClamp/MultimeterClamp/Multimeter
Electrical Tools FeaturesAuto RangingAuto Ranging,Backlit,Battery Powered,Built-in Clamp,Data Hold,Handheld,Interchangeable Leads,Tests Continuity,Tests ResistanceAudible Alert,Auto Ranging,Backlit,Data Hold,Dual Voltage Indication,Handheld,Integral Lead Storage,Interchangeable LeadsAudible Alert,Auto Ranging,Backlit,DC Polarity Indicator,Data Hold,Grounded Receptacle,Handheld,Integral Lead Storage,Interchangeable Leads
Voltage (volts)6006006001000
Control TypeDigitalDigitalDigitalDigital
Display TypeDigitalLCDDigitalLCD
Tools Product TypeTest MeterTest MeterTest MeterTest Meter
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
1.51
Product Height (in.)
8.45
Product Width (in.)
3.51

Details

Battery Power Type
Alkaline
Battery Size
AAA
Category Rating
III
Control Type
Digital
Display Type
LCD
Electrical Tools Features
Auto Ranging,Backlit,Battery Powered,Built-in Clamp,Data Hold,Handheld,Interchangeable Leads,Tests Continuity,Tests Resistance
Measures/Detects
Amperage,Capacitance,Continuity,Diodes,Duty cycle,Frequency,Polarity,Resistance,Temperature,Voltage
Number of Batteries Required
3
Number of Functions
15
Number of Ranges
33
Pack Size
1
Product Weight (lb.)
0.68
Returnable
90-Day
Test Meter Type
Clamp/Multimeter
Tools Product Type
Test Meter
Type
Clamp
Voltage (volts)
600

Warranty / Certifications

Manufacturer Warranty
Please refer to the attached warranty document in the Product Overview section above under Info & Guides.

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.6
    out of 139 reviews
  • 77%recommend this product
Filter by:
Showing 1-10 of 139 reviews
For electricians that work on both high current alternating current and direct current this is a ...
For electricians that work on both high current alternating current and direct current this is a must as it can read amperage in both AC and DC up to 400 amps. It has a lower scale up to 40 amps. It is also capable of measuring voltage both AC and DC, resistance, micro current and impedance, temperature in Fahrenheit and frequency in hertz. The meter is lightweight, and all of the components are included in a high quality Klein bag. I would recommend this meter for electricians.
by
  • Recommended
I chose this product for various reasons. If you live on a farm, you must deal with electric fenc...
I chose this product for various reasons. If you live on a farm, you must deal with electric fences. I wanted something to check the current on each wire of the fence to insure cattle would stay in the property lines and stay out of my garden. It takes only a few minutes for cattle to cause havoc in any case. I do use it to check issues with electricity in my barn and house also. this item has multiple uses and is a welcome tool to my arsenal. It will work in many tool boxes because it is so versatile.
by
  • Recommended
I work with various types of controls both AC and DC so I need a volt and amp meter to can work w...
I work with various types of controls both AC and DC so I need a volt and amp meter to can work with both and have a decent range. The Klein CL390 filled all of these needs in one meter. The feature I like most about this meter is the 400 amp range for both AC and DC currents. After using this meter a while I also came to appreciate the NCV (non-contact voltage) built into the amp clamp. This is typical of most amp meters, but they are always ON or you have to go through menu settings to turn the NCV on ON/OFF. This is annoying, however, Klein has a dedicated button to operate the NCV feature. No annoying volt sensing alerts when using the meter for other functions. The Klein is feature rich with true auto ranging TRMS and Min/Max with data hold. The battery compartment is easy to access and takes standard AAA batteries. I also appreciate the test lead holder built onto the clamp. Too often I have difficulty getting the test leads in tight areas and keeping my hands a safe distance from energized circuits. The test lead holder helps keep me safe. The only drawback of this meter is using it outside with bright daylight. The reverse contrast is perfect in low lighting areas, but outdoors is difficult to see even with LCD backlight on bright setting. I still prefer the Klein reverse display over the standard LCD display of other meters. As for protection of the meter itself, there is nothing in the manual about fuse protection so I assume the meter could be destroyed if the wrong operation is performed; for example measuring high voltage on ohm setting. Overall, this is a really nice set. I don't use my volt meters for temperature measurement but I like that the kit comes with the thermocouple probe. I needed to use the temp probe once and compared it against a calibrated thermometer and the Klein probe was within a degree.
by
This tool is a volt and amp meter with a clamp/antenna for passive detection of any electricity. ...
This tool is a volt and amp meter with a clamp/antenna for passive detection of any electricity. Auto ranging and has all levels to 400amp and 600 Volts. No contact sensor in the clamp and the meter claims to be safe dropped at 2 meters if you’re a dropper. Meet lots of industrial standards but I use it to find live wires. Comes with a case and a very basic thermocouple of limited quality. Detects temperature. C or F. Other type accessories are available for air and gas or surface or internal (needle) temperature probe. High contrast LCD readout is easy to see. Continuity test with included test leads. Instruction book is clear and comprehensive. The test leads are excellent quality.
by
  • Recommended
I have owned a Klein CL2000 clamp meter for several years (and have been very happy with it), so ...
I have owned a Klein CL2000 clamp meter for several years (and have been very happy with it), so I was curious about the improvements that have been made with this new model. After using it for a while, I am very impressed with pretty much everything about it. The new meter changed the selector switch so it can be operated with one thumb, whereas the older one was a 2-hand operation. As with the older meter, current can ONLY be measured with the clamp – do NOT try to measure current with the leads (except for 0-200 uA DC only). The new meter adds a 40 Amp scale so that if your current is < 40 amps you can have increased resolution. The older meter had 2 magnets for attaching to a metal case while doing measurements. The new meter has the option of a magnetic clamp, but there is a warning that doing DC current measurements with the magnetic clamp in position will negatively impact the accuracy of the current measurement. I would guess that this was an issue with the older meter also and that was why it was removed and made optional. The older meter’s leads had screw-on alligator clips for each lead, but the new meter does not have these, nor can the leads accept any screw-on attachment. I ordered some alligator clip probe adapters (get the ones for 2mm (.08”) probes if you order them also). Capacitance measurement is MUCH faster. The old meter took 23 seconds to measure a 3300 uF cap, while the new one took only 10 seconds; accuracy was the same for both. The new meter adds a temperature measurement as well as 2 levels of backlight brightness. Note that the meter can read to 1000 deg C, but the included probe is only rated to 230 deg C. Higher temperatures require a special metal probe that can withstand high temperatures
by
  • Recommended
This is a fantastic multi-tool for electrical measurement. First it has a no contact voltage dete...
This is a fantastic multi-tool for electrical measurement. First it has a no contact voltage detector which is usually a separate tool. Next it has an auto range adjusting AC and DC volt meter with red and black probes, a second tool. The CL390 also has a clamp 40/400 AMP reader, in another tool. The tool also has a thermometer. Plus it can read Hz, resistance, continuity, dipole and more. So much function in one tool. As a home DIY, this is fantastic for me (see VIDEO) as I needed an AMP meter and my previous volt meter was stand alone. The unit is well made, solid. There are only 17 tiny pages of instructions in each language. In a regular sheet, maybe two. I made my own AC line splitter to validate the AMP reading was working. There are other functions such as min / max / max-min and averaging that are really useful, although above my usage grade. I try to stay in my limitations when it comes to electrical measurements and repairs. Overall, amazing product, well made. Good job Klein Tools.
by
  • Recommended
Good Overall, Unless you want to use it outside
I was very happy with the quality and build of the unit. And it's features. Seemed accurate. The main purpose of me buying the CL390 model is to measure DC amps with the clamp. The only deal breaker is... I bought this mainly to use at my sportsman club outside to measure DC amps coming from our 12v batteries. In the direct sun the negative contrast "easy to read display" is not readable at all. Even for my young eyes. I read other reviews that this was an issue, but I decided to try it for myself to see if it was that bad. Even when I turned the back light on full brightness. Indoors it looks lovely. Out in full sun it does not, unless you shade the display with your hand. My hands are both busy holding probes I don't have a third to shade the display. I returned it and bought the CL800 model instead. It costs more, but at least I can read that display in daylight and darkness with the back light on. I'm not sure why the CL390 is their only multi-meter in their lineup that has this negative contrast display. If it had the regular display like their other models I would have been happy. Long story short if you plan to use this outside. I'd look at the CL800 instead.
by
    2 found this review helpful
    Klein makes great, professional products. This digital clamp meter is no exception. Fit and fin...
    Klein makes great, professional products. This digital clamp meter is no exception. Fit and finish are terrific. The control knob is solid, the various ranges are comprehensive and the accuracy is spot on. And the display is brightly illuminated. Comes with a sturdy case, excellent leads and a temperature sensor probe. When using as a clamp meter, best to use the accessory plug that splits the line and common wires - you can’t measure amperage flow if you clamp both - the opposite flows cancel out. Great all around meter.
    by
    • Recommended
    The Klein Tools AC/DC digital clamp meter with auto-ranging is well designed. Operation of the c...
    The Klein Tools AC/DC digital clamp meter with auto-ranging is well designed. Operation of the clamp is ergonomically formed to fit the hand easily. The dial for switching modes is placed so the thumb can easily roll up or down for quick changing. The screen for showing the readings of the meter is large enough to easily read. A nice feature not shown in the manual is the lead holder on the body of the unit allowing one hand to hold both the meter and the lead simultaneously.
    by
    • Recommended
    The CL390 clamp meter measures both AC and DC current. Provides non-contact voltage detection, m...
    The CL390 clamp meter measures both AC and DC current. Provides non-contact voltage detection, measures AC/DC voltage, DC microamps, resistance, provides audible continuity tracing, frequency, tests capacitance and diodes, measures temperature via a thermocouple probe, retains readings after shutoff. Take time to read the instructions and understand the functions provided. Features true root mean squared (TRMS) accuracy. The backlit digital display is easy to read. Auto-ranging reduces the need to adjust dial settings. The meter is powered by 3 AAA batteries (included). Auto-shutoff after about 10 minutes conserves battery life. Warranty: 2 years from date of purchase. Made in China.
    by
    • Recommended
    Showing 1-10 of 139 reviews