Extech Instruments MultiScope 381270 User manual

Owner's Manual
Model 381270 & 381275 MultiScopeTM
CAUTION: Read, understand and follow all Safety Rules and Operating Instructions in
this manual before using this product.

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TABLE OF CONTENTS Page
Safety Instructions 3
Safety Symbols 4
Specifications 5
Meter Description 7
Controls 7
Display Symbols 8
Graphical Display Description 9
Operating Instructions 10
AC Voltage Measurements 10
DC Voltage Measurements 10
mV Voltage Measurements 11
Resistance, Conductance and Continuity 11
Capacitance and Diode Measurements 11
mA and uA Current Measurements 11
Current Measurements 12
RPM Measurements 12
Signal Out 12
AUX 12
Install 12
Frequency Measurements 13
Trigger Level 13
Duty Ratio 13
Pulsewidth 13
Period 13
Min Max 13
Memory Storage 14
Auto/Manual Range 14
Relative 14
Peak-Hold 14
dB 14
Time (graphical) 14
Trigger (graphical) 15
Glitch 15
Software 16
Tilt Stand 17
Battery Replacement 17
Fuse Repacement 17
Warranty 18

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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. DO NOT service this device, if you are not qualified to do so.
SAFETY INSTRUCTIONS
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.
•Avoid Working Alone.
•Do not use Non-Rechargeable Batteries (Alkaline, Carbon Zinc etc.) together with
the AC power Adapter.
•Do not turn the Rotary switch to HI-Z/ range while the Test Leads are connected to
a High Voltage
•When measuring resistance (OHMS) be sure the circuit is non-powered. Ohms can
not be measured if there is voltage in the circuit being measured.
•When using the inductive pick up lead, be sure you keep the inductive clamp away
from adjoining high tension spark plugs leads to prevent the clamp from picking up
signals from those leads.
•Use a current clamp to measure circuits exceeding 20A.
•When measuring current, turn the power off before connecting the meter to the
circuit.
•Select the proper function and range for your measurement.
•Never connect more than one set of test leads to the meter.
•Disconnect the live test lead before disconnecting the common test lead.
•Choose the proper range and function for the measurement.
•Do not try voltage or current measurements that may exceed the ratings marked on
the function/range switch or terminal.
•Avoid Electrical Shock. Do not touch the test leads tips or the circuit being tested.
•Never operate the meter unless the back cover and the battery/fuse door are in
place and fastened securely

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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
situation, which if not avoided, could result in death or serious
injury.
This CAUTION symbol indicates a potentially hazardous
situation, which if not avoided, may result in minor or moderate
injury or damage to the product or other property.
This symbol advises the user that the terminal(s) so marked must
not be connected to a circuit point at which the voltage, with
respect to earth ground, exceeds (in this case) 500 VAC or VDC.
This symbol adjacent to one or more terminals identifies them as
being associated with ranges that may, in normal use, be
subjected to particularly hazardous voltages. For maximum
safety, the test leads should not be handled when these terminals
are energized.
WARNING
CAUTION
MAX

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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, >2GΩon mV range
Power 6 size AA cells, 6 size AA Nicad batteries, 2 Ni-Cad Battery
Pack or AC adaptor
Operating time: Alkaline (6hrs approx.), Ni-Cad (8hrs
approx.) Ni-Cad Charging time (3hrs approx.)
Temperature Operating: 32OF to 104OF(0OC to 40OC), Storage (Ni-Cad
batteries removed): -4OF to 140OF (-20OC to 60OC),
Charging: 32OF to 113OF(0OC to 45OC)
RS232 Interface Baud Rate: 9600, Data bit: 8 bit, Stop bit: 1 bit, Parity: none
Min/Max/Avg. Records minimum, average and maximum value
Hold Captures displayed reading
Storage 15 pages (text or graphic)
Dimensions/weight 4.2x8.3x2.2” (107x210x55mm) / 1.77lbs. (800gm)
Digital Storage Oscilloscope
Display Number of Channels One
Bandwidth DC to 100kHz
Volt / Division (4 divisions) 150mV to 400V
Sample Rate 1.0MSPS
Horizontal Number of Channels One
Second / Division (9 divisions) 10usec. to 1 second
Record length 25 div
Glitch Capture 500nsec. (minimum)
Multimeter Range Resolution Accuracy
400mV 0.1mV
4V 0.001V
40V 0.01V
400V 0.1V
DC Voltage
1000V 1V
±(0.5%rdg + 10dgt)
400mV 0.1mV
4V 0.001V
40V 0.01V
400V 0.1V
AC Voltage True
RMS
700V 1V
±(0.75%rdg + 10dgt) RMS
50Hz to 1kHz
400uA 0.001mA
400mA 0.1mA
DC Current
20A 0.01A
±(1.0%rdg + 10dgt)
400uA 1µA
400mA 0.1mA
AC Current
20A 0.01A
±(1.2%rdg + 10dgt) RMS
50Hz to 1kHz

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Multimeter Range Resolution Accuracy
400Ω0.1Ω
4kΩ0.001kΩ
40kΩ0.01kΩ
400kΩ0.1kΩ
4MΩ0.001MΩ
±(1.0%rdg + 5dgt)
Resistance
40Mohms 10kohms ±(3.0%rdg + 5dgt)
Conductance 0025 to 0999nS 1nS ±(3.0%rdg + 5dgt)
4nF 0.001nF
40nF 0.01nF
400nF 0.1nF
4µF 0.001µF
Capacitance
40µF 0.01uF
±(3.0%rdg + 5dgt)
1,000Hz 1HzFrequency
100kHz 1kHz
±(1.0%rdg + 5dgt)
Diode Test 1mV ±(2.0%rdg + 5dgt)
dB -80 to +80dB Reference values: 2, 4, 8, 16, 50, 75, 93,
110, 125, 135, 150, 300, 600, 900, 1000Ω
RPM 12000rpm 10rpm ±(3.0%rdg + 10rpm)
4000usec 1usecPeriod/Pulse
Width 1000msec 1msec
±(3.0%rdg + 5dgt)
Duty Cycle 1 to 100% 0.1% ±(3.0%rdg + 5dgt)
10Hz – 100Hz 1Hz
100Hz - 1000Hz 10Hz
Signal Out
1kHz – 20kHz 1kHz
±(1.2% + 5 digits)
OVERLOAD PROTECTION
Input Overload Protection
Function Maximum Input
V DC, V AC 1000V DC or AC peak, less than 10 sec
mV AC, mV DC 250V DC or AC peak, less than 10 sec
mA DC/AC 400mA DC / AC, Fused: 0.4A/250V ceramic fast blow
20A DC/AC 20A DC or AC, less than 30 sec with a 15 min cool
down period, Fused: 20A/250V ceramic fast blow
RPM 250V Dc or AC rms, less than 10 sec
Period/Pulse Width 250V DC or AC rms, less than 10 sec
Duty Cycle 250V DC or AC rms , less than 10 sec
Capacitance None
Diode None
WARNING: To avoid electric shock and damage to the meter, do not test
any diode or capacitor that has voltage on it

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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
the LCD display. The
function will change
depending on the position
of the rotary switch and the
mode of operation.
RST: Power reset key to re-activate power if the auto-shutoff is in effect after
30 minutes of inactivity.
MODE: Toggle between the multimeter text mode and the oscilloscope
graphics mode. The graphics mode functions in the V, A, and mV
modes.
HOLD: “Freezes” the reading on the display. Press “Hold” again to resume
normal operation. The hold symbol “H” will appear on the display when
Hold is selected.
HELP: Displays three screens (safety, connections, procedure) for the
function selected on the rotary switch. The F4 key steps through the
pages. Press “HELP” to exit.
HZ: Selects the Frequency mode in V functions.
MIN/MAX: Selects the MIN, MAX, Average display.
STORAGE: Store and recall measurement data or graphical display.
RANGE: Holds and selects a measurement range. Hold the key for 2 seconds
to return to auto-range.

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BASIC DISPLAYS
Multimeter Mode
Oscilloscope Mode
DISPLAY SYMBOLS
A Ampere
AC Alternating current
AUTO auto ranging
Ave average
BEEPER Button beeper
CALL Recall stored data
CLEAR Remove stored data
dB Decibel
DC Direct current
div division (graph mode)
DUTY Duty cycle
F Farads (capacitance)
Glitc Glitch Waveform
Hi-A High Current
Hi-Z High Impedance
Hz Hertz (frequency)
Max maximum
Min minimum
nS Nano Siemens (Conductance)
oC Degrees Centigrade
oF Degrees Fahrenheit
OUT Signal out
PAUSE Pause in “MIN/MAX” mode
P-H Peak Hold
Psi,kPa Pressure
RANGE manual ranging
REL Relative
RESET Reset
RMS True RMS
RPM revolution per minute
RS232 RS 232 Interface is on
RUN Record in “MIN/MAX” mode
Singl Single Waveform
SLEEP Auto shut-off
TEST Self Test (Install function)
Time Time change (graph mode)
TRIG Frequency Trigger
V Volts
Ωohms (resistance)
%RH Relative Humidty
2 cyl 2 cycle engine
4 cyl 4 cycle engine
Buzzer, Continuity
cursor (left or right)
%& cursor (up or down)
Low Battery Indication
Overrange on A & V ranges.
AC adaptor is connected

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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. The time division will vary to display the best wave
pattern in the autoranging mode or can be set manually using the “F1” and arrow
keys. The volts/division is determined by the range selected and cannot be varied.
SOFT KEYS AND SUB-MENUS
Function keys F1, F2, F3, and F4 are located directly below the 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. Operation of the menus and sub-menus is described in the
appropriate operation paragraph.

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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. Change to a
higher range.
AUTORANGE / MANUAL RANGE SELECTION
The meter will turn on in the autoranging mode. For most applications this is the
easiest and most accurate method of measurement. For measurements that require
the range to be held:
1. Press the “RANGE” key. The display will change from “AUTO” to “RANGE” (manual
range) with the full scale value displayed.
2. Each time the “RANGE” key is pressed, the next available range will be set.
3. To return to “AUTO” range, hold the “RANGE” key for 4 seconds.
DATA HOLD
The meter will freeze the reading in the display when the HOLD key is pressed. “H”
will apear in the display when HOLD is activated. Press HOLD again to resume
normal operation.
AUTO POWER OFF
The meter will automatically shut off after 30 minutes if a push button is not pressed or
the rotary switch is not moved. The symbol in the upper left of the display indicates the
time left to shut off.
AC VOLTAGE MEASUREMENT
1. Turn the rotary switch to the ACV position.
2. Press the HELP key and then the F4 key to display
procedures, cautions and connection diagrams
regarding ACV measurements.
3. Press the HELP key again to exit the HELP screens.
DC VOLTAGE MEASUREMENT
1. Turn the rotary switch to the DCV position.
2. Press the HELP key and then the F4 key to display
procedures, cautions and connection diagrams
regarding DCV measurements.
3. Press the HELP key again to exit the HELP screens

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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. Press the HELP key again to exit the HELP screens
RESISTANCE, CONDUCTANCE AND CONTINUITY
MEASUREMENTS.
1. Turn the rotary switch to the “Ω“ position.
2. The meter will turn on in the resistance autoranging
mode.
3. Press the HELP key and then the F4 key to display
procedures, cautions and connection diagrams
regarding resistance measurements
4. Press F2 to activate the continuity beeper .. The
meter will beep if the resistance measurement is less
than 40Ω.
5. Press F3 to enter the conductance (nS) mode. Conductance = 1/Ωand is displayed
in nS (nano Siemans) from 0025nS to 0999nS (1 to 40MΩ)
CAPACITANCE AND DIODE MEASUREMENTS.
1. Turn the rotary switch to the /position.
2. Press the HELP key and then the “F4” key to display
procedures, cautions and connection diagrams
regarding diode or capacitance measurements
3. The meter will turn on in the capacitance autoranging
mode.
4. Press F4 to enter the diode mode.
5. In diode check, the meter will display a diode symbol
and indicate the forward voltage drop across the
diode
mA / µA AC AND DC CURRENT MEASUREMENTS.
1. Turn the rotary switch to the mA/µAposition.
2. Press the HELP key and then the “F4” key to display
procedures, cautions and connection diagrams
regarding current measurements
3. The meter will turn on in the DC µA mode.
4. Press F4 to change to AC measurements.
5. Press F3 to change to the mA mode.

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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.
4. Press F3 to change from DC to AC current.
5. Press F4 to change to dB.
RPM MEASUREMENTS.
1. Turn the rotary switch to the RPM position.
2. Press the HELP key and then the “F4” key to display
procedures, cautions and connection diagrams
regarding rpm measurements
3. Connect the optional inductive pickup as described.
4. Press F1 for 2 cycle engines and F2 for 4 cycle
engines..
SIG.OUT
1. Turn the rotary switch to the SIG.OUT position.
2. Press the HELP key and then the “F4” key to display
procedures, cautions and connection diagrams
regarding the SIG.OUT function.
3. Press F1 to increase the frequency and F2 to
decrease the frequency.
4. Press F3 to initiate the output. Press again to disable
the output.
AUX
The AUX selection allows direct display of oC, oF, %RH, psi or High current in the
correct units when the meter is used with an optional adaptor.
1. Turn the rotary switch to the AUX position.
2. Press the HELP key and then the F4 key to display procedures, cautions and
connection diagrams regarding the AUX function.
3. Press F1 to F4 to select the units that match the adaptor being used
INSTALL
The Install function provides a means to set three default
Power-on conditions (dB reference, key beeper, auto-
shutoff) and also enable self-test.
1. Turn the rotary switch to the INSTALL position.
2. Press the F1 key to select one of the three features.
3. Press F2 to enable or disable the feature or to set the
dB reference level.
4. Press F3 to save the changes.
5. Press F4 to run the self test.

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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
F1 “TRIG” trigger level
a) The Trigger Level allows adjustment of the trigger level from 0 to 95% of the
peak of the measured signal.
b) Press F1 to change the polarity of the trigger.
c) Press F2 or F3 to adjust the % trigger level
d) Press F4 to exit the trigger level menu.
F2 “DUTY” duty ratio
a) The Duty function changes the display
from frequency to duty ratio.
b) Press F2 to enter the duty function. The
display will change to % if a signal is
present.
c) In the duty function, “DUTY” will blink.
d) Press F2 to exit the mode.
F3 “ t” pulsewidth
a) The pulse width function changes the
display from frequency to pulse width.
b) Press F3 to enter the pulse width
function. The display will change to mS if
a signal is present.
c) In the pulse width function, t will blink.
d) Press F3 to exit the mode.
F4 “ T” period
a) The period function changes the display from frequency to period.
b) Press F4 to enter the period function. The display will change to mS if a
signal is present.
c) In the period function, " T" will blink.
d) Press F4 to exit the mode.
MIN/MAX DISPLAY
1. Press the “MIN/MAX” key to enter this function.
2. The display will indicate the maximum value, the
average value, and the minimum value since the
mode was initiated and the relative time for each
value is displayed next to the value.
3. The time format is MIN:SEC (00:00).
4. Press F1 to reset the time and begin recording a
new series.
5. Press F3 to pause the recording.
6. Press F2 to resume recording after F3 is pressed.
TRIG t TDUT
Y

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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. At the selected memory location, press F2 to store the last text or graphical display
or press F3 to RECALL the stored data.
5. At the selected memory location, press F4 to clear the memory.
6. Press STORAGE to exit the feature.
RANGE
The meter will turn on in the autoranging mode. For most applications this is the
easiest and most accurate method of measurement. For measurements that require
the range to be held:
1. Press the RANGE key. The display will change from “AUTO” to “RANGE” (manual
range) with the full scale value displayed.
2. Each time the RANGE key is pressed, the next available range will be set.
3. To return to “AUTO” range, hold the RANGE key for 4 seconds.
RELATIVE (text soft key)
The relative mode displays of the difference
between a reference value and the measured
value
1. Press the F1 soft key when the measured reference value is on the display.
2. The “REL” label will blink when the relative mode is active.
3. Press F1 to exit relative mode.
PEAK-HOLD (text soft key)
1. Press the P-H soft key.
2. The LCD will display the Peak rms value of the
measured parameter, the peak max and peak min
values.
3. Press F3 PAUSE to hold the min and max values.
4. Press F2 RUN to continue measuring.
5. Press F1 RESET to reset the values for a new run.
6. Press F4 to EXIT.
DB (text soft key)
1. Press F4 “dB” to display dB. This feature is available in the voltage, millivolt and
amp functions.
2. The reference impedance is set in the install function.
TIME (graphical soft key)
The TIME function is used to adjust the horizontal display rate in time/division.
1. Press F1 “TIME”
2. Press the F1 or F2 up/down arrow keys to adjust the time.
3. Press F4 “EXIT” to return to auto-time.
REL P-H

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(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.
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. Press the sub-menu F4 “EXIT” to return to the graphical display.
SINGLE (graphical soft key)
The F3 “SINGL” key will trigger a single measurement when the key is pressed. and
open a sub-menu which allows time expansion or compression for enhanced
waveform viewing.
1. Press F3 to trigger a single measurement.
2. Press the sub-menu F2 or F3 arrow keys to change the time/division.
3. Press the sub-menu F1 key to trigger a new measurement.
4. Press F4 “EXIT” to return to the graphical display.
GLITC (graphical soft key)
The F4 “GLITC” key sets the meter to trigger a measurement on any signal which
causes an overrange indication or is greater than one vertical division or is greater
than 10% of one horizontal
division.
1. Press F4 to set the glitch
mode.
2. Any glitch will trigger a
measurement.
2. Press the sub-menu F2 or F3
arrow keys to change the
time/division and reset the
glitch trigger..
3. Press the sub-menu F1 key to
reset the glitch trigger..
4. Press F4 "EXIT" to return to
the graphical display.
EXIT
RESET EXIT

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SOFTWARE INSTRUCTIONS
INSTALLATION
1. Start Windows 95/98.
2. Insert the program disk into drive A:.
3. Select “START” and then “RUN” from the Windows menu bar.
4. Type “A:\SETUP.EXE” in the OPEN box and select “OK”
5. Follow the installation instructions on the screen.
OPERATION
1. Connect the RS-232 cable between the serial ports of the meter and the PC.
2. Select the “Mscope” icon in the START / PROGRAM menu.
3. In the MultiScope opening screen select “Setup / Comm Port”. Select the
proper COM port and click “OK”.
4. Select “Setup / Sampling Time” to set the sampling (data record) time for each
measurement.
5. Select “Setup / dB”to set the dB reference level.
6. Turn the meter ON and select “Run (on the menu bar) and Start”. The PC
display will indicate the measured value on the large display and also in a list
format with the associated time of measurement.
7. Select “Run / Stop” to stop the data recording.
8. Select “Graph / Bar or Line” to plot the data in graphical format.
9. Select “File / Save” to save the recorded data.
10. Select “File / Open” to open an existing file.
11. Select “File / Print” to print the file.
12. When the meter is in the graphical mode, press “MIN/MAX” to capture a
waveform display to the PC screen.
NOTE: Capturing a waveform will delete any active recorded data. To save any
recorded data, save it before using “MIN/MAX” to capture or capture the screen to the
MultiScope memory for later recall.
CAUTION: Always observe the MultiScope LCD display for overload conditions. If an
overload occurs, the MultiScope software displays the maximum value for the range
selected. It does not indicate an overload on the PC screen. i.e. If the 40V range was
held and a voltage greater than 40V was applied to the test leads, the PC display will
indicate “40.00”, not “OL” or the actual voltage. To avoid this condition, Autoranging is
recommended

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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.
2. To hang the meter, squeeze the
legs of the stand and remove it
from the meter. Turn the stand
180 degrees and replace in the
holder. The stand will now swing free over the top of the meter.
BATTERY REPLACEMENT
Caution: Do not use non-rechargeable batteries (alkaline, carbon-zinc, etc.) with the
optional AC power adaptor. The AC power adaptor may be used when the optional
rechargeable Ni-Cd batteries are installed.
1. Lift the tilt stand and remove the
two screws.
2. Lift the two battery covers up to
remove them.
3. Replace the six batteries.
Observe the proper polarity as
indicated in the compartment.
MULTISCOPE BATTERY TUBES
Contained within this package you will find two hollow cardboard tubes. The purpose
of these tubes is to hold the batteries in place in the battery compartment. Directions
for proper installation: Remove the battery cover screw and then remove the battery
cover itself. Insert three AA 1.5V batteries into each tube (observing proper polarity).
Now insert the full tube into the battery compartment (observing proper polarity).
Replace the battery cover and then replace the screw.
FUSE REPLACEMENT
1. Lift the tilt stand and remove the two screws.
2. Lift the two battery covers up to remove them.
3. Remove the batteries.
4. Lift to remove the fuse cover.
5. Replace any defective fuse with a fuse of the same type.

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CALIBRATION / 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 ensure calibration integrity.
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 [phone] 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.
Copyright © 2002 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.