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Model 380943     Ver. 2.1    11/2002 

Specifications 

General Specifications 

Display 

3-3/4 digit (4000 count) LCD with 40 segment bargraph 

Functions 

ACA, ACV, Resistance, and Continuity 

Polarity 

Minus sign ( - ) indicates negative polarity 

Overload indication 

Left blinking digit 

Relative Mode 

ZERO front panel key 

Display rate 

2 readings per second (20 readings per second for bargraph) 

Battery 

Two 1.5V AA batteries 

Operating conditions 

4

0

F to 122

0

F (-10

0

C to 50

0

C); < 85% Relative Humidity 

Storage conditions 

- 4

0

F to 140

0

F (-20

0

C to 60

0

C); < 75% Relative Humidity 

Altitude 

Operate at less than 2000 meters (Indoor use only) 

Power consumption 

Approximately 10mA DC 

Weight 

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) 

60.0A (0 to 50A)* 

± (1.5% + 3 digits) 

± (3.0% + 5 digits) 

60.0A (50 to 60A)* 

± (3.0% + 5 digits) 

± (3.5% + 5 digits) 

100A AC 

  
  

AC Voltage 

400.0V 

± (1.5% + 2 digits) 

± (2.0% + 4 digits) 

800V AC 

Resistance and Continuity 

Range Accuracy 

Audible 

Continuity 

Overload 

Protection 

40.0 to 400.0

 

± (1.5% + 2d) 

 Beeps < 38

 

600V AC 

Specification Notes 

 

Open Circuit Voltage: 0.4V 

 

AC Voltage Input Impedance: 10M

Ω 

 

Accuracy specified at 25

o

* Displays over 60A are possible but the accuracy of such measurements is not specified 

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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