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Digital Clamp Meter, AC Auto-Range TRMS, Low Impedance (LoZ), 2000 Amp
- Klein Tools Clamp Meter measures 2000A and 1000V AC/DC, 60M Ohms
- Clamp multimeter with dedicated mode to capture In-rush current
- LoZ mode for identifying and eliminating ghost or stray voltages
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Product Details
About This Product
The CL900 Electrical Tester is an auto-ranging, true root mean square (TRMS) digital clamp meter. It measures AC/DC current via the clamp and measures AC/DC voltage, resistance, continuity, frequency, duty-cycle, capacitance, and tests diodes via test-leads. It features a Low Impedance (LoZ) mode for identifying and eliminating ghost or stray voltages, and has a dedicated mode for capturing Inrush Current.
Highlights
- Digital Clamp Meter measures 2000A AC/DC, 1000V AC/DC, 60 Milliohm
- Rugged Klein TOUGH METER industrial design stands up to jobsite demands; built to withstand a 6.6 ft. (2m) drop
- Automatically ranging True Root Mean Squared (TRMS) measurement technology for accuracy
- CAT IV 600V, CAT III 1000V, Class 2, double insulation safety rating
- Backlit display for clear visibility in environments with low ambient lighting
- Dedicated mode for capturing Inrush Current
- Non-contact voltage tester integrated into the clamp
- Low impedance (LoZ) mode for identifying and eliminating ghost or stray voltages
- Audible continuity, capacitance, diode test, frequency and duty cycle, min/max feature, data hold capability
- Test leads measure AC/DC voltage, resistance, continuity, frequency, duty-cycle, capacitance and diodes
- Clamp measures AC and DC current
- Powers off automatically after 30 minutes of non-use to conserve battery life
- Low battery indicator and easily accessible battery compartment
- Includes carrying case (instruction manual), straight input test leads, and 2 x AAA batteries
- Can be used with Magnetic Hanger Cat. No. 69417 (sold separately)
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Product Information
Specifications
Dimensions
Product Depth (in.) | 10.43 in |
|---|---|
Product Width (in.) | 3.9 in |
Details
Accuracy Measurement | True-RMS |
|---|---|
Category Rating | III |
Features | Backlit, Data Logging, Interchangeable Leads, Low Battery Indicator |
Functions Measured | Amperage, Capacitance, Continuity, Diodes, Frequency, Resistance, Voltage |
Included | Batteries, Case, Test Leads |
Maximum AC Current (A) | 2000 |
Maximum AC Voltage | 1000 |
Maximum DC Voltage | 1000 |
Maximum Frequency (MHz) | 0.5 |
Maximum Resistance (ohms) | 60M |
Number of Functions | 12 |
Power Source | Battery Operated |
Range | Auto Ranging |
Returnable | 90-Day |
Warranty / Certifications
Certifications and Listings | CSA Certified |
|---|---|
Manufacturer Warranty | Please refer to the attached warranty document in the Product Overview section above under Info & Guides. |
Questions & Answers
Can you use it on conduit
The Klein Tools Cat. No. CL390, AC/DC Digital Clamp Meter, TRMS Auto-Ranging 400 Amp, measures current by clamping around one individual wire, not around conduit. Its non-contact voltage function may not detect voltage in wires inside grounded metal conduit. A lack of indication does not mean the wiring is de-energized.
Can you clamp this onto a wire in a house to see if there is voltage
No. The Klein Tools Cat. No. CL390, AC/DC Digital Clamp Meter, TRMS Auto-Ranging 400 Amp, cannot measure voltage by simply clamping around a wire. To measure AC or DC voltage, use the included test leads. The clamp function is used to measure current by clamping around a single conductor, rather than detecting the presence of voltage. If you only need to determine whether a wire is energized without making direct contact, a non-contact voltage tester would be the more appropriate tool.
can this be used to trace bad auto wiring
Klein Tools Cat. No. CL390, AC/DC Digital Clamp Meter, TRMS Auto-Ranging 400 Amp can be used to help diagnose automotive electrical issues by measuring AC/DC current, AC/DC voltage, resistance, continuity, frequency, capacitance, and DC microamps. It can help identify electrical faults such as opens, shorts, excessive current draw, and voltage drops. However, it is not designed to trace the physical routing of wiring through a vehicle like a dedicated wire tracer.
What is the lowest d c voltage this meter will show correctly
The Klein Tools Cat. No. CL390 AC/DC Digital Clamp Meter, TRMS Auto-Ranging 400 Amp, is capable of measuring DC voltage from very low levels up to 600V. On its lowest range (400.0 mV), it can detect voltages as low as approximately 1.0 mV, allowing for accurate measurement of very small DC voltage signals.
Will it measure DC current using the clamp
Yes, the Klein Tools CL390 AC/DC Digital Clamp Meter measures AC/DC current and NCVT via the clamp.
Does it measure inrush current
Klein Tools CL390 AC/DC Digital Clamp Meter has functions for TRMS, AC/DC Current, NCVT, AC/DC Voltage, Resistance, DC microamp, Frequency, Capacitance, Continuity, Duty Cycle, Diode Test, and Temperature, but is not designed to measure surge current. However, both the Klein Tools CL445 and CL810 do.
Can I measure clamped around Romex wiring?
You cannot measure clamped around both conductors. The magnetic field off one is of opposite polarity, and they cancel out. You must separate a conductor and clamp on only one of them. I assume when you say Romex, you intended to clamp the entire cable.
Yes, the Klein Tools CL390 Digital Clamp Meter can measure current through Romex.
does this meter have a temperature calibration screw
No
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Customer Reviews
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Compare Key Features
Product Snapshot | |||
|---|---|---|---|
Ideal for electricians needing accurate readings with TRMS, LoZ, and inrush current capture. CAT IV safety rated for demanding jobs. | Ideal for HVAC pros: Auto-ranging TRMS clamp meter, IR thermometer, and non-contact voltage tester with flashlight. | Ideal for HVAC technicians needing wireless data logging and versatile measurement capabilities in tight spaces. | Ideal for electricians needing True-RMS accuracy, data logging, and Fluke Connect for efficient troubleshooting and sharing. |
True RMS (TRMS) | |||
Low Impedance (LoZ) | |||
Temperature Measurement | |||
Auto-Ranging | |||
Data Logging | |||
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