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Summary of Contents for Extech Instruments MultiScope 381270
- Page 1 Owner's Manual Model 381270 & 381275 MultiScope CAUTION: Read, understand and follow all Safety Rules and Operating Instructions in this manual before using this product.
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Page 2: Table Of Contents
TABLE OF CONTENTS Page Safety Instructions Safety Symbols Specifications Meter Description Controls Display Symbols Graphical Display Description Operating Instructions AC Voltage Measurements DC Voltage Measurements mV Voltage Measurements Resistance, Conductance and Continuity Capacitance and Diode Measurements mA and uA Current Measurements Current Measurements RPM Measurements Signal Out... -
Page 3: Safety Instructions
WARNING: USE EXTREME CAUTION IN THE USE OF THIS DEVICE. Improper use of this device can result in injury or death. Follow all safeguards suggested in this manual. In addition to the normal safety precautions used in working with electrical circuits. -
Page 4: Safety Symbols
SAFETY SYMBOLS This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter. This WARNING symbol indicates a potentially hazardous WARNING situation, which if not avoided, could result in death or serious injury. -
Page 5: Specifications
SPECIFICATIONS Display 128x64 pixel graphic LCD (view area: 2.8x1.5”, 71.7x39mm) Measurement rate Digital: 4 times/sec; Bar-Graph: 7 times/sec. Auto Power Off After 30 minutes of inactivity Overrange indication “OVER” Display rate Digital display; 4/second Bargraph; 7/second Input resistance 10MΩ, >2GΩ on mV range Power 6 size AA cells, 6 size AA Nicad batteries, 2 Ni-Cad Battery Pack or AC adaptor... - Page 6 Range Resolution Accuracy Multimeter Resistance ±(1.0%rdg + 5dgt) 400Ω 0.1Ω 4kΩ 0.001kΩ 40kΩ 0.01kΩ 400kΩ 0.1kΩ 4MΩ 0.001MΩ 40Mohms 10kohms ±(3.0%rdg + 5dgt) Conductance 0025 to 0999nS ±(3.0%rdg + 5dgt) Capacitance 0.001nF ±(3.0%rdg + 5dgt) 40nF 0.01nF 400nF 0.1nF 4µF 0.001µF 0.01uF 40µF...
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Page 7: Meter Description
BASIC METER FUNCTIONS 1. RS 232 Computer lnterface Socket 2. AC Adapter Input Socket 3 LCD Screen display 4. Soft keys and labels 5. Buttons (Select mode of operation) 6. Rotary Switch (Select function). 7. Input jacks CONTROLS Soft function keys F1, F2, F3, F4 These four keys perform the function indicated on... -
Page 8: Display Symbols
BASIC DISPLAYS Multimeter Mode Oscilloscope Mode DISPLAY SYMBOLS Ampere RANGE manual ranging Alternating current Relative AUTO auto ranging RESET Reset average True RMS BEEPER Button beeper revolution per minute CALL Recall stored data RS232 RS 232 Interface is on CLEAR Remove stored data Record in “MIN/MAX”... -
Page 9: Graphical Display Description
GRAPHICAL DISPLAY DESCRIPTION 1. The graphical mode is entered when the “MODE” key is pressed when the function switch is in the ACV, DCV, mV, ACA or DCA position 2. The amplitude (vertical) and time (horizontal) divisions are selected automatically when in the autoranging mode. -
Page 10: Operating Instructions
OPERATING INSTRUCTIONS WARNING: Risk of Electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. 1. ALWAYS set the power switch to the OFF position when the meter is not in use. 2. If “OVER” appears in the display during a measurement in the manual range mode, the value you are measuring exceeds the range you have selected. -
Page 11: Mv Voltage Measurements
mV HI-Z AC AND DC VOLTAGE MEASUREMENTS 1. Turn the rotary switch to the mV/HI-Z. 2. Press F3 to toggle between AC and DC measurement. 3. Press the HELP key and then the F4 key to display procedures, cautions and connection diagrams regarding DCV measurements 4. -
Page 12: Current Measurements
AC AND DC CURRENT MEASUREMENTS. 1. Turn the rotary switch to the AC/DC A position. 2. Press the HELP key and then the “F4” key to display procedures, cautions and connection diagrams regarding current measurements 3. Maximum allowed current is 20 Amps. Use a current clamp for larger currents. -
Page 13: Frequency Measurements
HZ FREQUENCY MEASUREMENTS 1. Press the HZ key in the ACV, DCV, mV, or Amp function to change to the frequency display. The frequency related soft keys will appear on the display. 2. Frequency display soft-keys TRIG DUTY F1 “TRIG” trigger level The Trigger Level allows adjustment of the trigger level from 0 to 95% of the peak of the measured signal. -
Page 14: Memory Storage
STORAGE FUNCTIONS 1. Press the STORAGE key to enter this feature. 2. The display will list four memory locations and indicate what type of data is stored in each location. Locations with no data will be left blank. 3. Press F1 to scroll the diamond cursor down through the 15 memory locations. 4. -
Page 15: Trigger (Graphical)
(graphical soft key) The F2 left/right arrow key will “freeze” the waveform on the display and open a sub- menu which allows time scrolling. EXIT 1. Press F2 to freeze the graphical display. 2. Press the sub-menu F1 or F2 arrow keys to shift the waveform in time. 3. -
Page 16: Software
SOFTWARE INSTRUCTIONS INSTALLATION Start Windows 95/98. Insert the program disk into drive A:. Select “START” and then “RUN” from the Windows menu bar. Type “A:\SETUP.EXE” in the OPEN box and select “OK” Follow the installation instructions on the screen. OPERATION Connect the RS-232 cable between the serial ports of the meter and the PC. -
Page 17: Tilt Stand
TILT STAND The tilt stand can be placed either in the locked stand position for flat surface use or in the hinged position for hanging use. 1. For use on a flat surface, lift the stand to approximately a 55 degree angle and push in until the stand locks in the holding hole. -
Page 18: Warranty
WARRANTY EXTECH INSTRUMENTS CORPORATION warrants the basic 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 for authorization.
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