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GENERAL SPECIFICATIONS
Klein Tools RT390 is a circuit analyzer that tests the wiring condition
at an electrical outlet, displays AC line voltage, inspects GFCI and AFCI
devices with time to trip device, and performs voltage drop tests at
12A, 15A and 20A current loads. The tester is designed for use with
North American 120V AC 3-wire electrical outlets.
• Environment: Indoor. Do NOT expose to moisture rain or snow.
• Operating Altitude: 6562 ft. (2000m)
• Relative Humidity: <85% non-condensing
• Operating Temp: 32° to 122°F (0° to 50°C)
• Storage Temp: -4° to 140°F (-20° to 60°C)
• Dimensions: 7.1"× 2.7"× 1.5" (3.86 × 6.93 × 17.93 cm)
• Cord: 14AWG, 15A, 12" (30.5cm) NEMA 5-15P to IEC 320 C13
• Weight: 10.92 oz. (311.1 g) including batteries
• Battery Type: 3 x 1.5V AAA Alkaline
• Standards: Conforms to UL STD.61010-1,
61010-2-030, 1436
Certified to CSA STD C22.2 # 61010-1,
61010-2-030, 160
• Pollution degree: 2
• Drop Protection: 6.6 ft. (2m)
• Ingress Protection: IP40 dust resistant
• Safety Rating: CAT III 135V
CAT III: Measurement category III is applicable to test and
measuring circuits connected to the distribution part of the
building’s low-voltage MAINS installation.
Specifications subject to change.
ELECTRICAL SPECIFICATIONS
ENGLISH
FUNCTION
RANGE &
RESOLUTION
ACCURACY REQUIREMENTS
AC Voltage
30.0 to
150.0V AC
2% ±2 digits 50/60Hz
Operating
Frequency
45 to 64Hz N/A N/A
GFCI Trip Current 6.0 to 9.0mA 1% ± 0.2mA
110V to 125V AC,
50/60Hz
GFCI Trip Time 0.0 to 6.0s 1% ± 10ms
GFCI (30mA)
Trip Current
26.0 to
38.0mA
1% ± 0.2mA
GFCI (30mA)
Trip Time
0.0 to 6.0s 1% ± 10ms
AFCI Trip Current 106A to 141A N/A
AFCI Trip Time 0 to 400ms 2% ± 20ms
Load Test
Voltage Drop
0.1 to 99.9% 3.0% ±2 digits
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