Extech 381265 Instruction Manual

User’s Manual

Mini MultiScope II

MODEL 381265

WARRANTY

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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. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied.

CALIBRATION AND REPAIR SERVICES

Extech offers complete repair and calibration services for all of the products we sell. For periodic calibration, NIST certification or repair of any Extech product, call customer service for details on services available. Extech recommends that calibration be performed on an annual basis to insure calibration integrity.

Tech Support Hotlines

781-890-7440 ext. 200

extech@extech.com

www.extech.com

in whole or in part in any form.

381265 V2.0 6/00

Safety

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 function selected.

V DC 1000V DC

Function Maximum Input

V AC 700V AC Ohms 250V DC/AC mA DC/AC 400mA DC/AC 20A DC/AC 20A DC/AC Diode 250V DC/AC

2. USE EXTREME CAUTION when working with high voltages.

3. DO NOT measure voltage if the voltage on the "COM" input jack

exceeds 500V above earth ground.

4. NEVER connect the meter leads across a voltage source while

the function switch is in the current, resistance or diode mode. Doing so can damage the meter.

5. ALWAYS discharge capacitors in power supplies and disconnect

the power when making resistance or diode tests.

6. ALWAYS turn off the power and disconnect the test leads before

opening the back to replace the fuse or batteries.

7. NEVER operate the meter unless the back cover is in place and

fastened securely.

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present

Double insulation

Input Limits

Specifications

DIGITAL MULTIMETER

Function Ranges Resolution Accuracy DC Voltage

AC Voltage True RMS

DC Current

AC Current True RMS

Resistance

Capacitance

Frequency 10Hz to

Period/Pulse Width

Duty Cycle 1 to 100% 1% +(3.0%rdg + 5dgt) Signal Out 10Hz to 50kHz 1Hz to 10kHz +(1.2% + 5 digits)

400mV 0.1mV 4V 1mV 40V 10mV 400V 100mV 1000 V 1V 400mV 0.1mV 4V 1mV 40V 10mV 400V 100mV 700V 1V +(1.5%rdg + 10dgt) 400mA 20A 10mA 400mA

20A 10mA 400 ohms 0.1 ohms +(3.0%rdg + 10dgt)

4K 1 ohm 40k 10 ohms 400k 100 ohms 4Mohms 1k ohms 40Mohms 10k ohms +(3.0%rdg +5dgt) 4nF 1pF 40nF 10pF 400nF 100pF 4µF 40µF 400µF 4mF

100kHz 10µsec to

100msec

100µA

1nF 10nF 100nF +(5.0%rdg + 10dgt) 1µF

0.1Hz to 1kHz

1µsec to

0.1msec

+(0.75%rdg + 10dgt)

+(1.0%rdg + 10dgt)

50Hz to 1kHz

(unspec'd 1kHz to

30kHz)

+(1.2%rdg + 10dgt)

+(1.5%rdg + 10dgt)

50Hz to 1kHz

+(1.0%rdg + 5dgt)

+(3.0%rdg + 5dgt)

Unspecified

+(1.0%rdg + 5dgt)

+(3.0%rdg + 5dgt)

Diode Test Test current of approximately 2.4mA Logic Check TTL, 3V CMOS, or 5V CMOS selectable dB (-80 to +80dB) 2, 3, 8, 16, 50, 75, 93, 110, 125, 135, 150, 300,

DIGITAL STORAGE OSCILLOSCOPE Bandwidth DC to 100kHz, 1 channel

Sample rate 1Meg samples per second Divisions +2 vertical, 9 horizontal Record length 25 divisions Time base 5µsec. to 1.3sec. per division Vertical 75mV to 500V (17 steps)

Glitch capture 500nsec. (minimum) Trigger Level adjustable ±2 divisions (in 0.1 steps)

COMMON SPECIFICATIONS Display 128x64 pixel graphic LCD

Viewing Area 2.8x1.5” (71.7x39mm) Measurement rateDigital: 4 times/sec. Bargraph: 7 times/sec. Auto Power Off 30 minutes Overrange Indicates “OVER” Power 6 size AA cells, 6 size AA NiCad batteries, 3

Operating time Alkaline (6hrs approx.), NiCad (8hrs approx.)

Temperature Operating: 32OF to 104OF (0OC to 40OC),

Min/Max/Avg. Displays minimum, average, & maximum

Hold Captures displayed reading Storage 15 pages (text or graphics) Dimensions 3.6x7.6x2.2inches (92x192x55mm) Weight 1.0lbs. (450gm)

600, 900, 1000, or 1200 ohms reference

mA: 75 to 300mA (4 steps) A: 7.5 to 15A (2 steps)

(Positive or negative edge moving trigger)

dual cell NiCad Battery Packs or AC adaptor

NiCad Charging time (3hrs approx.)

Storage (NiCad batteries removed): -4OF to 140OF (-20OC to 60OC), Charging: 32OF to 113OF (0OC to 45OC)

readings over time

Meter Description

1. LCD Display

2. Function keys

3. Rotary range select switch

4. DMM banana input jacks

5. Protective rubber holster

6. AC Voltage adapter jack

Note: Tilt stand and battery compartment are on rear of unit.

Display Symbols and Function keys

Soft function keys F1, F2, F3, F4

These four keys perform the function indicated on the LCD display. The function will change depending on the position of the rotary switch and the mode of operation. Functions with a right arrow will produce a sub-menu on the display for further selection.

OTHER FUNCTION KEYS MODE Toggles between the multimeter text mode and the

oscilloscope graphics mode. The graphics mode is available in the V, A, mV, mA and HI-A modes.

HOLD “Freezes” the reading on the display. Press “HOLD”

again to resume normal operation. The symbol “HOLD” will appear on the display when Hold is selected.

STORAGE Store and recall measurement data or graphical

display.

RANGE Selects and holds a measurement range. Hold the

key for 4 seconds to return to autorange mode.

Hz/RESET Press the “MODE” key for 4 seconds to select the

Frequency mode in voltage functions.

MIN/MAX Press the “STORAGE” key for 4 seconds to select

the MIN, MAX, Average display.

AC/DC Toggle between AC and DC measurements in mV,

mA and A functions.

BASIC DISPLAYS

Refer to illustrations below. The Oscilloscope mode produces a graphical display (left). The Multimeter mode produces a numerical display with an analog bargraph (right).

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