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Summary of Contents for Extech Instruments 38390
- Page 1 User's Manual Digital AC Clamp Meter Model 38390...
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Page 2: Warranty
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). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. -
Page 3: Safety Symbols
INTRODUCTION Congratulations on your purchase of Extech’s 38390 AC Clamp Meter. This autoranging clamp meter measures AC Current to 400A, DC/AC Voltage, Resistance, and Continuity. Proper use and care of this meter will yield years of reliable service. SAFETY Safety Symbols... -
Page 4: Safety Precautions
Safety Precautions WARNING: Improper use of this meter can cause damage, shock, injury or death. Read and understand this users manual before operating the meter. Always remove the test leads before making current measurements. Always remove the test leads before replacing the batteries. Inspect the condition of the jaws, test leads and the meter for any damage before operating the meter. -
Page 5: Specifications
SPECIFICATIONS Function Range Accuracy Remarks AC Current 40.00A ± (2% + 15 digits) Frequency: 50/60Hz; 400.0A 660A overload protection AC Voltage 400.0V ± (1.5% + 10 digits) Frequency: 40Hz to 450Hz; 600V Input Z: 1MΩ; 660Vrms OL protect DC Voltage 400.0V ±... - Page 6 Conductor Size 0.9" (23mm ) maximum Operating principle Dual slope integration Battery type 2 x 1.55V button (ICE LR-44, NEDA 116A or A76) Battery Life 200 hours Auto Power off After 30 minutes Range Selection Automatic ranging Display 3-3/4 digit (3999 Count) LCD Overload Indication "OL"...
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Page 7: Meter Description
METER DESCRIPTION Front panel Symbols AC Current or Voltage Jaw opening trigger DC Voltage Function switch (OFF, A, V, Ω) Continuity COM input jack Display Data Hold Transformer Jaws Auto Range DATA HOLD key Low Battery icon AC/DC Selector key Units LCD Display Volt (voltage) -
Page 8: Operating Instructions
OPERATING INSTRUCTIONS Precautions Ensure that the selected meter function matches the measurement to be taken. If the measured current is higher than the range selected for long periods, overheating may occur compromising the safety and the operation of the meter’s internal circuits. To avoid discharge risks and erroneous readings, do not measure current on high voltage conductors (>600V). - Page 9 DC and AC Voltage Measurements Set the Function Switch to the V position. Press the AC/DC key (directly below the HOLD key) to select AC or DC Voltage. The meter will show the selection with an AC or DC symbol (upper left side of LCD). Insert the black test lead to the COM input jack and the red test lead to the V jack.
- Page 10 Data Hold Press the HOLD key momentarily to freeze the present reading on the LCD. "H" will appear in the display. Press the HOLD key again to return to normal operation.
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Page 11: Maintenance
MAINTENANCE WARNING: To avoid electrical shock or damage to the meter, keep moisture from entering the meter housing. Also, remove the test leads before opening the meter housing. Cleaning Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Battery Replacement When the low battery symbol appears on the LCD, replace the meter’s two button-batteries. - Page 12 Battery Replacement Illustrations Slide battery to right Press on other side to lift battery Remove battery Insert battery on angle Press to seat battery...
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