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True RMS Watt Clamp-on 400A


Price starts at $439.99

Product Code : 380940-NIST

Manufacturer : Extech

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Download or View this product's / series details and specifications Specifications (PDF)


  • Large LCD with 40 segment analog bargraph
  • Data Hold, Max/Min recall, Auto Zero (DC current), plus low battery indication


Measures Watts, Current, and Voltage. Proper use and care of this meter will yield years of reliable service.

General Specifications
Display 3-3/4 (4000 count) Digit LCD with 40 segment bargraph
Functions Watts, ACA, DCA, ACV, DCV, Frequency
Polarity ?-? indicates negative polarity
Current sensor Hall effect sensor type
Overload indication Left blinking digit
DCA zero adjust One touch zero key Display rate ; 2 readings/second (20 readings/second for bargraph)
Display rate 2 readings/second (20 readings/second for bargraph)
Auto Power Off 30 minutes after power ON
Battery Two 1.5V AA batteries
Operating temp. 4 ° F to 122 ° F (-10 v C to 50 ° C)
Operating Humidity < 85% RH
Power consumption Approximately 10mA DC
Weight 6.7 oz. (190g) including battery
Dimensions 7.2 x 2.5 x 1.4? (183 x 63.6 x 35.6mm) (HWD)
Jaw opening 0.9? (23mm)
Standards IEC 1010 Category III 300V, Category II 600V
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