Related Manuals for Extech Instruments 381285
Summary of Contents for Extech Instruments 381285
- Page 1 User's Guide 查询"381285"供应商 Handheld MultiScope Model 381285 WARNING MEASUREMENT OF VOLTAGE IN OSCILLOSCOPE MODE GREATER THAN 250VAC OR 360VDC WILL RESULT IN PERMANENT DAMAGE AND POSSIBLE INJURY...
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Page 2: Table Of Contents
Table of Contents Section Page Warranty 查询"381285"供应商 Safety Specifications Symbols and Annunciators Soft Keys and Sub Menus Operation (Oscilloscope) AC and DC Voltage Time/Div Volt/Div Trigger More Single Glitch Position Cursor Operation (Digital Multimeter) AC and DC Volts Resistance Continuity... -
Page 3: 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 查询"381285"供应商... - Page 4 This meter has been designed to be safe in use, but the operator must use caution in its operation. 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 for the 查询"381285"供应商 function selected. Input Limits...
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Page 5: Specifications
Specifications DIGITAL MULTIMETER 查询"381285"供应商 WARNING MEASUREMENT OF VOLTAGE IN OSCILLOSCOPE MODE GREATER THAN 250VAC OR 360VDC WILL RESULT IN PERMANENT DAMAGE AND POSSIBLE INJURY DC Voltage Range Resolution Accuracy 400mV 0.1mV 0.001V ±(0.3%rdg + 5dgt) 0.01V 400V 0.1V 1000 V... - Page 6 Capacitance Ranges Resolution Accuracy 40nF 0.01nF 400nF 0.1nF 查询"381285"供应商 ±(2%rdg + 10dgt) 4µF 1µF 40µF 10µF 100µF 0.1µF Frequency Counter Range Resolution Accuracy 0.5Hz to 45MHz 0.1Hz ±(0.1%rdg + 5dgt) Signal Output Range Form Amplitude 2.5Hz to 78kHz Square wave, 50% duty cycle,...
- Page 7 DIGITAL STORAGE OSCILLOSCOPE Channels Bandwidth DC to 5MHz 查询"381285"供应商 Sample rate 25Mega samples per second Vertical Sensitivity 10mV/div to 200V/div (14 divisions) Time base 125ns. to 2sec. per division (23 divisions) Glitch capture 500nsec. (minimum) Trigger Level adjustable ±2 divisions (in 0.1 steps)
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Page 8: Symbols And Annunciators
Meter Description RS232 pc interface connector 查询"381285"供应商 LCD Dot matrix display Soft function keys Display storage key Scope/multimeter key Function switch Sig. Out, mA, Frequency jack 20A jack AC adaptor jack Help key Hold key Mode keys Com jack Volts, ohms, cap, diode jack... -
Page 9: Soft Keys And Sub Menus
Soft-Keys and Sub-Menus Soft keys are located directly below the 查询"381285"供应商 LCD display and perform multiple operation as indicated on the LCD and determined by the function selected by the rotary switch. Some functions will produce a sub-menu on the display for further selection... -
Page 10: Operation (Oscilloscope)
Operation (Oscilloscope) AC and DC VOLTAGE 查询"381285"供应商 WARNING MEASUREMENT OF VOLTAGE IN OSCILLOSCOPE MODE GREATER THAN 250VAC OR 360VDC WILL RESULT IN PERMANENT DAMAGE AND POSSIBLE INJURY WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances (contacts can be recessed deep in the outlets). -
Page 11: Time/Div
Oscilloscope Functions Volt Time Trigger More… /Div /Div 查询"381285"供应商 (F1): Time per division (horizontal). Time /Div AUTO ▲ ▼ EXIT MANUAL Time divisions are selected automatically when in the autoranging mode. The time division will vary to display the best wave pattern in the autoranging mode or the time / division can be set manually using the F1 and the sub-menu arrow (▲▼)keys. -
Page 12: Glitch
RESET ▲ ▼ EXIT 查询"381285"供应商 The Glitch key sets the meter to trigger a measurement on any single event which causes an overrange indication or is greater than one vertical division or is greater than 10% of one horizontal division. -
Page 13: Cursor
The cursor function measures time difference or voltage difference between two cursors on the screen. Selecting ∆V will produce two horizontal cursors and selecting one of the ∆t functions will produce two vertical cursors. The amplitude or 查询"381285"供应商 time difference between the two cursors is displayed on the screen. ∆V ∆t%... -
Page 14: Operation (Digital Multimeter)
Operation (Digital Multimeter) AC and DC VOLTAGE 查询"381285"供应商 WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances (contacts can be recessed deep in the outlets). As a result, the reading may show 0 volts when the outlet actually is live. Make sure the probe tips are contacting the metal contacts inside the outlet before assuming that no voltage is present. -
Page 15: Resistance
WARNING: To avoid electric shock while taking any resistance measurements, disconnect power to the unit under test and discharge all capacitors. Remove the 查询"381285"供应商 batteries and unplug the line cords. Insert the black test lead into the negative COM jack and the red test lead into the positive Ω... -
Page 16: Ac And Dc Current
WARNING: To avoid electric shock do not measure AC current on any circuit whose voltage exceeds 250V AC. 查询"381285"供应商 CAUTION: Do not make current measurements on the 20A scale for longer than 30 seconds once every 15 minutes, Exceeding 30 seconds may cause damage to the meter and/or the test leads. -
Page 17: Relative
Actuation of the relative mode automatically switches the meter to manual ranging. 查询"381285"供应商 When the F1 REL soft key is pressed the value in the display is stored as the reference value. -
Page 18: Limit
The Limit feature (available in Voltage, Resistance and Aux functions) allows for testing or selection of components between a settable minimum and maximum limit. The measured value and HIGH, LOW or PASS will be displayed. 查询"381285"供应商 Press the LIMIT soft key to enter the LIMIT mode. -
Page 19: Frequency Counter, Duty Cycle And Dwell
COUNTER jack Turn the rotary switch to the Freq. Counter position 查询"381285"供应商 Press the F1 Frequency key to measure and display the frequency. Press the F2 Duty to see the Duty Cycle in percent and the Dwell Angle in degrees. -
Page 20: Set Up
Self-Test, Auxiliary inputs and a Users Manual. Press the F1 Next Item key to move the selection pointer to the desired item. 查询"381285"供应商 Press the F2 ◄► key to select the desired condition. Press the F3 Save key to save the selection. -
Page 21: Backlight
SET UP function. Extended use of backlighting will reduce the battery life. Press the HOLD key for 4 seconds to turn the EL backlighting on. 查询"381285"供应商 Press the HOLD key for 4 seconds to turn the EL backlighting off. -
Page 22: Rs232 Commuincations
Installation Start the PC. Insert the Software Program diskette into drive A : 查询"381285"供应商 Select "START" and then "RUN" from the Windows menu bar. Type "A:\ SETUP” in the OPEN box and select "OK" Follow the installation instructions on the screen. -
Page 23: Maintenance
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery cover. 查询"381285"供应商 WARNING: To avoid electric shock, do not operate your meter until the battery cover is in place and fastened securely. -
Page 24: Fuse Replacement
WARNING: To avoid electric shock, do not operate your meter until the battery covers are in place and fastened securely. NOTE: If your meter does not work properly, check the battery and fuses to make sure that 查询"381285"供应商 they are still good and that they are properly inserted. Disconnect and remove the test leads.