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True RMS AC Clamp-on DMM
•
True RMS AC measurements enable
precision distorted or non-sinusoidal
waveform measurements
•
Peak Hold and Data Hold
•
Selectable temperature measurement units
•
Frequency measurements using the current
jaws or using the test leads.
1. INTRODUCTION
Congratulations on your purchase of Extech's 380973 True RMS AC Clamp-on DMM. This
professional meter, with proper care, will provide years of safe reliable service.
INSTRUCTION MANUAL
Model 380973
1
380973
Ver. 1.01 8 /99
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Table of Contents
Related Manuals for Extech Instruments 380973
Summary of Contents for Extech Instruments 380973
- Page 1 Frequency measurements using the current jaws or using the test leads. 1. INTRODUCTION Congratulations on your purchase of Extech’s 380973 True RMS AC Clamp-on DMM. This professional meter, with proper care, will provide years of safe reliable service. 380973 Ver. 1.01 8 /99...
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Page 2: Specifications
SPECIFICATION NOTE: Accuracy is tested in a 64 to 82 F (18 to 28 C) <80% Relative Humidity environment. The accuracy specs apply to measurements taken in the largest circle inside the clamp jaw (refer to the diagram in Section 3). 380973 Ver. 1.01 8 /99... -
Page 3: Front Panel Description
10 Temperature units select key – Press to select desired units 4. INTERNATIONAL SAFETY SYMBOLS CAUTION: CAUTION: Double Refer to Risk of Electrical Insulation documentation Shock 380973 Ver. 1.01 8 /99... -
Page 4: Operation
5. OPERATION 5.1 True RMS Measurements The 380973 incorporates True RMS technology meaning that non-sinusoidal (triangle, sawtooth, etc.) or distorted waveforms can be measured more accurately than averaging meters. The degree of distortion that the meter can accurately measure is determined by the ‘crest factor’... - Page 5 3. When the resistance measured is lower than 40Ω, the meter will sound an audible tone. 380973 Ver. 1.01 8 /99...
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Page 6: Maintenance
Warning: To avoid electrical shock or damage to the meter, do not allow water or other liquids to enter the meter case. Remember to remove power and test leads before opening meter case. Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. 380973 Ver. 1.01 8 /99... -
Page 7: Warranty
8. WARRANTY EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables).
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