Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time,Orange

Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time,Orange

Q: does this actually place a load on the circuit for for voltage drop?

It simulates a 12,15, and 20 amp load and displays the percentage drop, according to the operating instructions.

Q: Will this indicate open neutral or open ground when circuit is not energized?

Way late on answer this. If you’re talking about (Klein Tools RT210 Outlet Tester) then no, it has to have power on the circuit as this is not battery powered to show the tester how it’s wired.

Q: Does this simulate and test both serial and parallel arc fault conditions?

This tester plugs into an outlet on the circuit under test, so it seems to me that automatically makes it a parallel device. Therefore it can only simulate an arc fault such as might occur in a parallel device, i.e. what you normally plug into an outlet. (A typical faulty item being be a lamp with a frayed power cord.) I believe the tester would have to be wired into the circuit in series to simulate a serial arc fault. I don't know the nature of the tester's design but it may be that tripping an AFCI unit (an AFCI outlet, for instance) with a parallel fault simulation may also prove the AFCI's ability to respond to a serial arc fault, at least in part. Disclaimer: I'm not an electrician or EE so you may want to dig farther on this subject, but I believe I have the basics right.

Q: Does this protect trip a gfci protected receptacle with an open ground?

No it will not. No tester will trip a GFCI with open ground. You have to use the button on the receptacle/breaker in that case. Make sure the outlet is labeled with "no equipment ground."

Product ID: 562206413

Secure Transaction

Details

Brand
KLEIN TOOLS
Power Source
Battery
Item Weight
222 g
Item dimensions L x W x H
25.4 x 25.4 x
Min. Operating Voltage
120 Volts

⚡Detects wiring faults & voltage drops

📊Large color LCD for clear results

⏱️Measures AFCI/GFCI trip time

Frequently Bought Together

Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time

Klein Tools 69411 Circuit Breaker Finder Accessory Kit, Circuit Breaker Leads, Circuit Breaker Adapters

Description

⚡ Power Up Your Precision – Test Smarter, Work Safer!

LOAD TESTING AT MULTIPLE AMPS - Test voltage drops at 12A, 15A, and 20A loads to guarantee optimal circuit performance.
PRECISION AFCI GFCI TESTING - Accurately measure trip time and current to ensure your safety devices perform flawlessly.
INSTANT CLARITY WITH COLOR LCD - See wiring faults and voltage drops in vivid detail for faster, confident diagnostics.
SMART POWER MANAGEMENT PORTABILITY - Auto shut-off saves battery life; detachable cord keeps your toolkit sleek and organized.
DUAL FAULT DETECTION FOR ULTIMATE SAFETY - Identify open neutral and ground faults to prevent costly electrical hazards.

The Klein Tools RT390 Circuit Analyzer is a professional-grade tester designed for North American 120V AC outlets. Featuring a large color LCD, it detects wiring faults including dual faults, inspects AFCI and GFCI devices with trip time measurement, and performs load testing at 12A, 15A, and 20A. Lightweight and battery-powered with auto shut-off and a detachable cord, it delivers reliable, easy-to-interpret diagnostics for electricians and serious DIYers alike.

Specifications

Brand	KLEIN TOOLS
Power Source	Battery Powered
Item Weight	222 g
Item dimensions L x W x H	25.4 x 25.4 x 25.4 Centimeters
Min. Operating Voltage	120 Volts
Specification Met	Cat Iii 135v, Afci, Gfci, Ul, Fcc
Upper Temperature Rating	55 Degrees Celsius
Measurement Type	Analog Tester
Maximum Operating Voltage	120 Volts
UPC	092644693632
Manufacturer	Klein Tools
Global Trade Identification Number	00092644693632
Country of Origin	China
Item model number	RT390
Product Dimensions	25.4 x 25.4 x 25.4 cm; 222.26 g
ASIN	B0BT87LJRL

Have a Question? See What Others Asked

does this actually place a load on the circuit for for voltage drop?

Will this indicate open neutral or open ground when circuit is not energized?

Does this simulate and test both serial and parallel arc fault conditions?

Does this protect trip a gfci protected receptacle with an open ground?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products