Extech Extech 380976-K Manual

View at www.TestEquipmentDepot.com

User Guide

1Φ/3Φ 1000 Amp True RMS Power Clamp-On
Model 380976

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com

Introduction

Congratulations on your purchase of the Extech 380976 Power Clamp-On Meter. This
device measures 1Φ/3Φ Power (True, Apparent, and Reactive), Horsepower, Phase
Angle, True RMS Current/Voltage, Resistance, Capacitance, Frequency, & Temperature.
Power measurements can be achieved on 3- or 4-wire configurations. Please read the
entire manual to get the most from the meter’s wide array of capabilities. This meter is
shipped fully tested and calibrated and, with proper use, will provide years of reliable
service.

Table of Contents

Warranty...................................................................................................................................3

Safety Information...................................................................................................................3

Meter Description....................................................................................................................4

AC + DC Voltage Measurements............................................................................................5

AC Current Measurements..................................................................................................... 5

1Φ KW, KVA, KVAR, Power Factor & Phase Angle Measurement .....................................6

3Φ 3-Wire KW, HP, KVA, KVAR, Power Factor & Phase Angle Measurement ..................7

3Φ 4-Wire KW, HP, KVA, KVAR, Power Factor & Phase Angle Measurement ................10

Resistance and Audible Continuity Measurements...........................................................13

Capacitance Measurements.................................................................................................14

Diode Tests............................................................................................................................14

Temperature Measurements ................................................................................................14

AC and DC

Meter Control Keys ...............................................................................................................15

Automatic Sleep Mode and Battery Replacement .............................................................16

Specifications........................................................................................................................17

Calibration, Repair, and Technical Support Services........................................................20

µA

Current Measurements................................................................................14

2

380976 V2.0 6/07

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 to 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] ext. 210 for authorization or visit our website www.extech.com for contact
information. 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.

Safety Information

• Read the following safety information carefully before attempting to operate or
service the meter.

• To avoid damage to the instrument do not exceed the maximum input limits shown in
the technical specifications.

• Do not use the meter or test leads if they appear damaged.

• Use extreme caution when working around bare conductors or bus bars. Accidental

contact with the conductor could result in electric shock.

• Use the meter only as specified in this manual; otherwise, the protection provided by
the meter may be impaired.

• Read the operating instructions before use and follow all safety information.

• Use caution when working with voltages above 60VDC or 30VAC RMS. Such

voltages represent a shock hazard.

• Before taking resistance measurements or testing continuity, disconnect the circuit
under test from the main power supply and remove all loads from the circuit.

Safety symbols

Caution! Refer to this manual before using the meter.

Dangerous voltages.
Meter is protected throughout by double insulation or

reinforced insulation.

When servicing, use only specified replacement parts.

Complies with EN-61010-1, IEC 1010-2-32

3

380976 V2.0 6/07

Meter Description

1. Transformer Jaws

2. Jaw opening trigger

3. Data Hold & MX/MN button

4. Function Selector

5. Range button

6. Temperature input jack

7. LCD Display

8. ‘COM’ input jack

9. ‘V’ input jack

Ω

µA

10.

input jack

4

380976 V2.0 6/07

Measurements

AC + DC Voltage Measurements

WARNING

The maximum input is 600V. Do no attempt voltage measurements above this limit.
Exceeding this limit could cause electrical shock and damage to the meter.

1. Set the rotary switch to the ‘ V’ position.

2. Insert the test leads into the meter’s input jacks. (Black to
‘COM’ and Red to ‘V’)

3. Connect the test leads to the measured circuit.

4. The meter will automatically detect and display AC or DC
voltage. The meter will also automatically select the
appropriate range.

5. Read the voltage (main display) and frequency (upper,
smaller display digits) on the LCD.

NOTE: The sensitivity for Automatic AC/DC Voltage detection is
1V. Voltage below 1V may indicate DC.

NOTE: The sensitivity for voltage measurements is 1.2V and the frequency range is
40Hz to 1 KHz. If the frequency is less than 40Hz the LCD may display ‘Hz’.

AC Current Measurements

1. Set the rotary switch to the "~A" position.

2. Press the Trigger to open the jaw.

3. Fully enclose the conductor that is being measured in the jaw. No gap should exist
between the two jaw halves. The conductor under test must be a single wire; if there
are multiple wires in a cable the conductor must first be isolated (see diagram below).

4. The meter selects the range automatically.

5. Read the measured current (main display) and frequency (upper display) on the LCD.

NOTE: The sensitivity for current measurements is 6A and the frequency range is

40Hz to 400Hz. If the frequency is less than 40Hz the LCD may display ‘Hz’.

5

380976 V2.0 6/07

AC Power Measurements

1Φ KW, KVA, KVAR, Power Factor & Phase Angle Measurement

1. Set the rotary switch to the ‘KW/KVA’
position.

2. Insert the test leads to the meter as
follows: Black to ‘COM’ and Red to ‘V’.

3. Connect the black lead to the neutral line.

4. Connect the red lead to the power line
and clamp onto the same lead to which
the red lead is connected.

5. The meter selects the best range
automatically.

6. Select the desired display combination
using the RANGE key. Press RANGE to
scroll through the following combination displays:

 kW and HP (horsepower)
 kW and PF (power factor)
 kW and KVAR (reactive power)
 KVA and phase angle (θ)
 V and A

Note that LEAD and LAG icons are also displayed on the LCD to inform the user that the
voltage is leading or lagging the current with regard to phase.

Note: Allow 2 seconds after each RANGE key press for the meter to update the display.

1 HP = 746 Watts

KW

PF

=

= cosθ

KVA

KVA (Apparent Power) = (V*A) / 1000
KVAR (Reactive Power) =

22

(KVA) (KW)

−

= KVA * sinθ

NOTES

1. The ‘+’ sign printed on the meter must face the power source for best accuracy.

2. If the device under test is a switching mode power supply, the KW, PF, and
Phase angle measurements may not be accurate.

6

380976 V2.0 6/07

3Φ 3-Wire KW, HP, KVA, KVAR, Power Factor & Phase Angle Measurement

1.

First, measure W

a. Set the rotary switch to the “

(refer to the diagram below).

RS(L1L2)

V ”.

b. Press and hold the “HOLD” key while setting the rotary switch to “KW/KVA”, the

3φ3W and W

symbols will appear.

L12

c. Insert the test leads into the jacks.
d. Select a phase (e.g. S or L2) as COM and connect the test probe of the COM

(black) terminal to that phase (e.g. S or L2).
e. Connect the test probe of V (red) terminal to the second phase (e.g. R or L1).
f. Clamp the same phase as step e. (e.g. R or L1).
g. The power clamp will automatically select the proper range.
h. Wait until the reading is stable (about 6 seconds). Press the “HOLD” key to store

the measured value. The W

symbol will appear.

L23

2.

Second, measure W

(refer to the diagram that follows the steps below).

TS(L3L2)

a. Disconnect the test probe from the phase where the jaw clamp was set in the

previous measurement.
b. Connect the test probe to the third phase (e.g. T or L3).
c. Clamp the third phase where test probe is connected to (e.g. T or L3)
d. The power clamp will automatically select the proper range.
e. Wait until the reading is stable (about 6 seconds) and then press the “HOLD” key

to store the measured value.

7

380976 V2.0 6/07

W

3.

The power clamp will process these two sets of data (W

on the LCD. The W
(in watts) is stored in the meter memory.

symbol will be shown to indicate 3φ3W power. The 3φ3W power

L123

L12 , WL23

4. To read a single data record, press the “
or W

display then

L123

KW+PF (Power Factor), KW+KVAR, KVA+θ(Phase Angle) or A+V.

5.

W

= W

3φ3W

RS(L1L2)

press the “RANGE” key to select KW+HP (Horse Power),

+ W

TS(L3L2)

HOLD

” key to select desired

), and show the result

W

, W

L12

L23

2

33

PF

W

33

φ

=

6. Set the rotary switch to another position to exit this mode and clear the stored data.

KWKVA 33

W

K

KVA

33

φ

33

φ

W

33

+=

W

2

8

WKVARW

φφφ

380976 V2.0 6/07

Once a phase is selected as COM, users can not change this selection in the
subsequent measurement. For example, if S (or L2) phase is selected, S (or L2)
phase is always connected to the COM during measurement of W
W

(or W

TS

) in 3φ 3W unbalanced power.

L3L2

NOTE

(or W

RS

1. The "+" sign printed on Panel must face the power source for accurate
measurement.

2. If the device under test is a switching power supply, the meter KW, PF and θ
reading maybe incorrect.

NOTE

NOTE

For 3φ3W unbalanced power measurements, WRS or WTS could be negative.
Ensure that all connections are correct before accepting a reading as valid.

L1L2

) and

9

380976 V2.0 6/07

3Φ 4-Wire KW, HP, KVA, KVAR, Power Factor & Phase Angle Measurement

1.

First, measure W

a. Set the rotary switch to the “

(refer to the diagram below).

R(L1)

V ” position.

b. Press and hold the “RANGE” key while setting the rotary switch to the “KW/KVA”

position, the 3φ4W and W

symbols should appear.

L1

c. Insert the test leads into the input jacks.
d. Connect the neutral line to the COM (black) terminal.
e. Connect the test probe of the V (red) terminal to the first phase (e.g. R or L1).
f. Clamp on to the same phase (e.g. R or L1).
g. The power clamp meter will automatically select the proper range.
h. Wait until the reading is stable (about 6 seconds) and then press the “HOLD” key;

the W

symbol will clear and the WL2 symbol will appear in order to instruct users

L1

to take the W

measurement.

S(L2)

2.

Second, measure W

(refer to the diagram that follows the steps below)

S(L2)

a. Disconnect the test probe from the phase where the jaw was clamped in the

previous measurement.
b. Connect the test probe of the V (red) terminal to the second phase (e.g. S or L2).
c. Clamp on to the phase where the test probe is connected (e.g. S or L2 phase)
d. The power clamp will automatically select proper range.
e. Wait until the reading is stable (about 6 seconds) and then press the “HOLD” key;

symbol will disappear. The W

the W

L2

the W

measurement.

T(L3)

symbol will appear to instruct users to take

L3

10

380976 V2.0 6/07

3.

Third, measure W

(refer to the diagram that follows the steps below)

T(L3)

a. Disconnect the test probe from the phase where the jaws were clamped in the

previous measurement.
b. Connect the test probe of the V (red) terminal to the third phase (e.g. T or L3

phase).
c. Clamp the phase where the test probe is connected to (e.g. T or L3).
d. The power clamp will automatically select the proper range.
e. Wait until the reading is stable (about 6 seconds), and then press the “HOLD” key;

symbol will disappear.

The W

L3

11

380976 V2.0 6/07

4. The power clamp will process these three sets of data (W
the LCD. The WL

symbol will be shown to indicate the 3φ4W power (refer to diagram).

123

L1, WL2 WL3

The 3φ4W power value in watts is now stored in the meter’s memory.

5. To read a single data record, use the “
WL123 display then

press the “RANGE” key to select KW+HP (Horse Power),

HOLD

” key to select WL1, WL2, WL3 or

KW+PF (Power Factor), KW+KVAR, KVA+θ(Phase Angle) or A+V displays.

12

) and show the result on

380976 V2.0 6/07

6.

W

W

= W

3φ4W

KVA K

PF

34

φ

+ W

R(L1)

S(L2) WT(L3)

φφ φ

=+

K

W

=

KVA

7. Set the rotary switch to another position to exit this mode and clear the stored data.

1. The "+" sign printed on meter must face the power source for accurate
measurement.

2. If the device under test is switching power supply, the KW, PF and θ readings

may not be correct.

For 3φ4W power measurements, W
negative power, check the connections.

Resistance and Audible Continuity Measurements

Before taking any in-circuit resistance measurements remove power from the circuit
under test and discharge all capacitors.

1. Set the rotary switch to the

2. Insert the test leads into the input jacks. (Black to ‘COM’ and

3. Connect the test leads to the circuit or component under test.

4. Read the resistance value on the LCD.

5. For measurements < 40

Red to ‘

Ω’

)

W

34

φ

34

φ

2

W

W

Ω

KVARWW W34

34

R

WARNING

‘Ω, ’

’

, the continuity beeper will sound.

2

34

NOTE

NOTE

or WS and WT must be positive. If one shows

or ‘MΩ

’ position.

13

380976 V2.0 6/07

Capacitance Measurements

1. Fully discharge the capacitor under test before proceeding.

2. Insert the test leads into the input jacks. (Black to ‘COM’ and
Red to ‘

3. Set the rotary switch to the ‘

’).

’ position.

4. Connect the red and black test leads to the capacitor. For
Electrolytic (polarized) capacitors, connect the red test lead to
the positive side and the black lead to the negative side.

5. Read the capacitance value displayed on the LCD.

Note: Large valued capacitors will take a long period of time to charge and to auto-range

to the correct range. (up to 60 seconds in the worst case). For improved resolution
and shortest test time, manually pre-selecting the proper range is recommended.

Diode Tests

1. Set the rotary switch to the "

2. Insert the test leads into the input jacks. (Black to ‘COM’ and Red to ‘

" position.

’)

3. Touch the test probe tips to the diode or semiconductor junction under test. Note the
meter reading.

4. Reverse the test lead polarity by reversing the red and black leads. Note this reading.

5. The diode or junction can be evaluated as follows:

a. If one reading shows a value and the other reading shows ‘OL’ (overload), the

diode is good.
b. If both readings show ‘OL’, the device is open.
c. If both readings are very small or zero, the device is shorted.
d. Note that the audible continuity function is operational in this mode (<40mV).

Temperature Measurements

1. Set the rotary switch to the "TEMP" position.

2. Press the RANGE button to select the desired unit of measure (C or
F).

3. Insert the Type K Thermocouple into the subminiature input jacks
located to the lower left of the rotary selector switch.

4. Touch the thermocouple sensor to the object under test.

5. Read the temperature value on the LCD.

AC and DC

1. Set the rotary switch to the "

µA

Measurements

" position.

µA

2. Insert the test leads into the input jacks. (Black to ‘COM’ and
Red to ‘

µA’)

3. Connect the test leads in series with the circuit or device
under test.

4. The meter will automatically select AC or DC and the
appropriate range.

5. Read the current value on the LCD.

14

380976 V2.0 6/07

Meter Control Keys

HOLD - MX/MN Key

Data Hold Function

Press this key momentarily to put the meter into Data Hold mode (HOLD will appear on
the LCD). In this mode, the meter freezes the displayed reading. To exit the Data Hold
mode, press the key again (the HOLD icon will switch off). Note that the Data Hold
mode is not available for Capacitance measurements.

MX/MN (Maximum and Minimum reading mode)

The MX/MN mode permits the user to record and recall the highest and lowest readings.
The MX/MN feature is available for ACA, ACV, DCV, TEMP, and µA functions only. The
following steps outline the MX/MN feature:

1. Take an ACA, ACV, DCV, TEMP, or µA measurement as described earlier.

2. Press and hold the MX/MN key for 2 seconds.

3. The Elapsed Timer (top display) and the MX/MN & ® indicators will appear on the
LCD.

4. The Elapsed Timer shows the duration of the measurement session in Minutes and
Seconds (the Elapsed Timer switches to Hours and Minutes after 60 minutes). The
maximum recording time is 100 hours.

5. The ® indicator informs the user that the measurement range is being held. Note
that the AUTO POWER OFF feature is disabled in the MX/MN mode.

6. Press the MX/MN key again to view the highest reading and the time (shown on
the Elapsed Timer) that the reading was taken. The ‘MX’ icon will appear on the
LCD.

7. Press the MX/MN key again to view the lowest reading and the time (shown on the
Elapsed Timer) that the reading was taken. The ‘MN’ icon will appear on the LCD.

8. Press again to view the current elapsed time and measurement.

9. To exit this mode, press and hold the MX/MN key until MX/MN indicators switch off.

Using the HOLD button for Power Measurements

Refer to the power measurement section of this manual for details.

RANGE Key

The RANGE Key operation varies from mode to mode. Refer to the information below:

In ACA, ACV, DCV, µA, Capacitance, and Resistance modes:

1. Press RANGE to enter the Manual Range mode (the ® indicator will appear).

2. Press RANGE again to select the desired range manually.

3. Press and hold the RANGE key to exit this mode (the ® indicator switches off).

In KW/kVA mode:

As described earlier, use the RANGE key to select the desired display combination:
KW & PF, KW & KVAR, KVA & Phase angle, or Current / Voltage.

In TEMP mode:

Use the RANGE key to select the desired unit of measure (

15

o

C or oF).

380976 V2.0 6/07

Automatic Sleep Mode and Battery Replacement

The Meter is powered by a 9V battery. An AUTO SLEEP feature is included to preserve
battery life.

Note: The Auto Power OFF feature is disabled when the meter is in the MIN/MAX mode
Note: In the sleep mode the meter continues to draw a small amount of battery current.

Always turn the function switch to the OFF position when storing the meter.

Note: To restore operation after the sleep mode has engaged, turn the function switch to

the OFF position and then back to the function desired.

Auto Sleep Disable

The meter automatically goes to sleep mode after 30 minutes to conserve battery energy.
To defeat this feature:

1. Turn the meter OFF.

2. Press and hold the HOLD key while turning the selector switch to the AC Amps
position.

3. Release HOLD when the clock icon appears on the LCD.

Battery Replacement

WARNING

To prevent electrical hazard or shock, turn off the meter and disconnect test
leads before removing the back cover.

When the battery power falls low, the LCD will display the battery icon +.
To replace the 9V battery:

1. Set the Range switch to the OFF position.

2. Remove the back cover by first removing the rear screws and then prying open the
housing.

3. Replace the 9V battery.

4. Reassemble the meter housing.

16

380976 V2.0 6/07

Specifications

General Specifications

Display Dual Display; 4-digit, 10,000 count (0 to 9999) LCD
Jaw Opening 1.6” (42mm)
Max. Input limit Max. voltage between any terminal and ground: 600Vrms
Sampling rate 2.5 times per second (Digital Display); Once every 6

Auto Sleep After approx. 30 minutes (feature can be defeated)
Low battery indication Battery symbol appears on the LCD
Power supply 9V Battery
Battery life Approx. 32 hours with alkaline battery
Operating Temperature 32 to 122
Operating Humidity < 80% RH
Operating Altitude 7000 ft. (2000 meters) maximum.
Storage Temperature 14 to 140
Storage Humidity < 70% RH
Temperature coefficient 0.1 x (specified accuracy) /

Dimensions 9.0 x 3.0 x 1.5" (228 x 76 x 39mm)
Weight Approx. 1.0 lb. (465g)
Approvals CE, UL
Safety

This meter is intended for indoor use and protected, against

UL Listed The UL mark does not indicate that this product has been

PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY I

Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in
which measures are taken to limit the transient overvoltages to an appropriate low level.
Note – Examples include protected electronic circuits.

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III

Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.

OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation.
Note – Examples include electricity meters and primary over-current protection equipment

seconds (KW, KVA, and KVAR)

o

F (0 to 50oC)

o

F (-10 to 60oC)

o

(28

o

C)

C at < 64oF (18oC), > 82oF

the users, by double insulation per EN61010-1 and
IEC61010-1 2nd Edition (2001) to CAT III 600V; Pollution
Degree 2. The meter also meets UL 61010A-1, First Edition

evaluated for the accuracy of its readings.

17

380976 V2.0 6/07

Measurement Specifications

Accuracy: ± (% of rdg + number of digits) from 18

o

C to 28oC (64oF to 82oF) R.H. < 80%

AC Current (50Hz to 400Hz) True RMS

Range Resolution Accuracy (% reading) Sensitivity Overload Protection

99.99A 10mA 0.10A

999.9A 100mA

± (

2% + 20d) (50, 60Hz)

± (4% +

20d) (40~400Hz)

1.0A

1000A

µA True RMS (AC+DC)

Range Resolution Accuracy Sensitivity Overload Protection

99.99µA

999.9µA

10nA 0.20µA

100nA

±(1

% + 20d)

2.0µA

600V

Burden Voltage: 5mV/µA

AC Voltage (50Hz to 400Hz) True RMS

Range Resolution Accuracy Sensitivity Overload Protection

±(

999.9mV 0.1mV

9.999V 1mV 0.020V

99.99V 10mV 0.20V

600.0V 100mV

Input impedance: 3M

1% + 20d) (50, 60Hz)

±(2

% + 20d) (40~100Hz)

±(

1% + 20d) (50, 60Hz)

±(2

% + 20d) (40~400Hz)

Ω

2.0mV

2V

600V

DC Voltage

Range Resolution Accuracy Sensitivity Overload Protection

999.9mV 0.1mV 2.0mV

9.999V 1mV 0.020V

99.99V 10mV 0.20V

600.0V 100mV

Input resistance: 3M

Ω

±(

1.0% + 20d)

600V

2V

Resistance (Audible Continuity for readings <40Ω on the 999.9Ω range)

Range Resolution Accuracy Overload Protection

999.9Ω 100mΩ

9.999KΩ 1

99.99KΩ 10Ω

Ω

± (1% +

10

d) 600V

999.9KΩ 100Ω

18

380976 V2.0 6/07

MΩ (Resistance)

Range Resolution Accuracy Overload Protection

9.999MΩ 1KΩ

99.99MΩ 10KΩ

±(5% +

10

d) 600V

Capacitance

Range Resolution Accuracy Overload Protection

10.000µF

100.00µF

1000.0µF
7000µF 1µF

1nF

10nF

100nF

±(1.5% +

±(2.5% +

15

5

d)

600V

d)

Diode (Continuity <40mV)

Range Resolution Accuracy Overload Protection

2.000V 1mV

±(2% + 1

d) 600V

Temperature (K-Type thermocouple)

Range Resolution Accuracy Overload Protection

-50oC to 900oC 0.1oC

-58oF to 1000oF 0.1oF

1Φ/3Φ TRUE Power (PF > 0.5 or 

< 60o) (50/60Hz)

±(1%
±(1%

+

1oC)

+ 2oF)

30V

or 60VDC

AC

Range Resolution Accuracy Overload Protection

60.00KW (<100A) 10W

600.0KW (>100A) 100W

1Φ/3Φ

Horse Power (HP) (PF > 0.5 or 

±(

5%

+ 20

d)

±(

5%

+ 20

d)

< 60o) (50/60Hz)

600VAC/
1000AAC

Range Resolution Accuracy Overload Protection

80.00HP (<100A) 0.01 HP

800.0 HP (>100A) 0.1 HP

1Φ/3Φ Reactive Power (KVAR) (PF > 0.5 or 

±(

5%

+ 20

d)

±(

5%

+ 20

d)

< 60o) (50/60Hz) 

600VAC/1000AAC

Range Resolution Accuracy Overload Protection

60.00KVAR (<100A) 10VAR

600.0KVAR (>100A) 100VAR

±(

5%

+ 20

d)

±(

5%

+ 20

d)

600VAC/
1000AAC

19

380976 V2.0 6/07

1Φ/3Φ

Apparent Power (KVA)

Range Resolution Accuracy Overload Protection

60.00KVA (<100A) 10VA

600.0KVA (>100A) 100VA

±(

2.5%

+ 20

d) 600VAC/1000AAC

Phase Angle (

-60° ~ 0° ~ +60° 0.1º

Frequency

40Hz/1KHz 0.1Hz ±(0.5% + 2d) ACV>5V, ACA>6A

50/60Hz)

Range Resolution Accuracy Sensitivity

±6.0º

ACV>100V, ACA>10A

Range Resolution Accuracy Sensitivity

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech also
provides NIST certification for most products. Call the Customer Service Department for
information on calibration services available for this product. Extech recommends that
annual calibrations be performed to verify meter performance and accuracy.

All rights reserved including the right of reproduction in whole or in part in any form.

Technical support: Extension 200; E-mail: [e-mail]

Repair & Returns: Extension 210; E-mail: [e-mail]

Product specifications subject to change without notice

For the latest version of this User Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451

Copyright © 2007 Extech Instruments Corporation

Support line [phone]

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20

380976 V2.0 6/07

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com