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User Manual 

 

 
 

Model

 

380943 

 

High Resolution 60 Amp AC Clamp-on Meter 

 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 

 
 

 4000 Count Display with 10uA Resolution 

 

 20 reading per second bargraph 

  

 Shielded transformer jaws 

 

 Selectable filter circuit  

 

 MAX/MIN, Relative, & Hold functions 

 

 1.2” (30mm) jaw diameter 

 
 
 
 
 

Introduction 

Thank you for selecting the Extech 380943 AC Clamp Meter. This device is ideal for 
checking leakage, ground, and sheath current. This professional meter, with proper care, 
will provide years of safe reliable service. 

Summary of Contents for 380943

Page 1: ...raph Shielded transformer jaws Selectable filter circuit MAX MIN Relative Hold functions 1 2 30mm jaw diameter Introduction Thank you for selecting the Extech 380943 AC Clamp Meter This device is ideal for checking leakage ground and sheath current This professional meter with proper care will provide years of safe reliable service ...

Page 2: ...ht 7 oz 200g including battery Dimensions 8 3 x 2 4 x 1 4 210 x 62 x 35 6mm HWD Jaw opening 1 2 30mm Standards IEC 1010 Category III 300V Category II 600V Range Specifications Range Resolution Accuracy 50 60Hz Accuracy 40Hz to 1Khz Overload Protection AC Current 40 00mA 1 0 3 digits 2 0 5 digits 400 0mA 1 0 3 digits 2 0 3 digits 4 000A 1 0 3 digits 2 0 3 digits 40 00A 1 0 3 digits 2 0 3 digits 60 ...

Page 3: ...as been designed with safety in mind but the operator must use caution The rules listed below should be carefully followed for safe operation 1 NEVER apply voltage or current to the meter that exceeds the specified maximum 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 600V above earth ground 4 ALWAYS turn off the power a...

Page 4: ...z such as an inverter switching regulator etc To verify the presence of a high frequency signal take measurements in both switch positions If the readings are widely different then a high frequency signal can be assumed present AC Current Measurements Basic Current Measurement Procedure WARNING To avoid electric shock disconnect the test leads from the meter before making current measurements 1 Se...

Page 5: ...d the maximum specified limits 1 Set the Function switch to the Voltage position 2 Set the Frequency Slide Switch to the appropriate position refer to the section Using the Frequency Slide Switch earlier in this manual 3 Insert the test leads to the meter as follows Red lead to the red V input terminal Black lead to the black COM input terminal 4 Connect the test leads to the circuit or device und...

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