Extech Instruments 382400 User manual

User Guide

Flexible AC Clamp Meter

3000 Amp / 600 Volt

Model 382400

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech 382400 Product Page

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

FAX 781.665.0780 - TestEquipmentDepot.com

382400 V1.1 06/07

Introduction

Congratulations on your purchase of the Model 382400 Extech AC Clamp device. The

Model 382400 features:

True RMS AC measurements

3000A maximum current

600V maximum voltage

Fast Peak Hold feature

MAX-MIN and Data Hold features

Auto Power OFF

This meter is shipped fully test and calibrated. Careful use of this meter will provide years

of reliable service.

Safety

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

SAFETY NOTES

•Do not exceed the maximum allowable measurement ranges.

•Set the function switch to the OFF position when the meter is not in use.

•Remove the batteries if the meter is to be stored for longer than 60 days.

WARNINGS

•Do not install the flexible current probe around bare conductors carrying a voltage

ranging from 30V to 600V unless wearing protective clothing and gloves suitable for

high-voltage work.

•Always inspect and check any damage of the current probe assembly before usage.

Do not use the flexible current probe if any damage is found.

•Do not use the meter on circuits rated higher then 600V.

•Set function switch to the appropriate position before measuring.

•When measuring voltage do not switch to the current mode.

382400 V1.1 06/07

CAUTIONS

•Improper use of this meter can cause damage, shock, injury or death. Read and

understand this user manual before operating the meter.

•Always remove the test leads and clamp jaw from circuits or devices under test before

replacing the battery or fuses.

•Use great care when making measurements if the voltages are greater than 25VAC

rms. These voltages are considered a shock hazard.

•Voltage checks on electrical outlets can be difficult and misleading because of the

uncertainty of connection to the recessed electrical contacts. Other means should be

used to ensure that the terminals are not "live".

•If the equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

MAXIMUM INPUTS

Function Maximum Input

Current (Amperes) 3000A AC

Voltage (Volts) 600V AC

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

382400 V1.1 06/07

Description

Meter Description

1. Clamp conductor

2. COM test lead input jack

3. Voltage (V) test lead input jack

4. LCD Display

5. HOLD, MIN, MAX, PEAK mode button

6. Function select switch

7. 50/60Hz select push-button

8. Flex Clamp probe

9. Clamp coupling mechanism

Display Description

HData Hold

MAX Max reading

MIN Min reading

Pk Peak reading

Low battery

VVolts (Voltage)

AAmperes (Current)

HZ Frequency

AP Auto Power OFF

Minus sign Negative reading display

0 to 9999 Measurement display digits

382400 V1.1 06/07

Operation

NOTES: Read and understand all Warning and Caution statements in this operation

manual prior to using this meter. Set the function select switch to the OFF position when the

meter is not in use.

AC True RMS Current Measurements

WARNING: Ensure that the test leads are disconnected from the meter before making

current clamp measurements.

1. Set the Function switch to the Aposition.

2. Select the fundamental frequency (50Hz or 60Hz) with the 50Hz-60Hz push-button.

The LCD display will reflect the selected

frequency.

3. Open the clamp loop by pressing the latch tabs

and disconnecting the clamp coupling connector.

4. Fully enclose only one conductor centered inside

the clamp loop. Allow at least 25mm between the

conductor and the clamp coupling connector.

5. The meter’s LCD will display the current (A) and

frequency (Hz) readings.

Note: For measurements lower than 3A, the meter’s

frequency display will indicate ‘0’.

‘OL’ is displayed when the measurement exceeds

the specified maximum limit.

AC True RMS Voltage Measurements

WARNING: Maximum input is 600Vac rms. Do not attempt to take any voltage

measurement that exceeds this limit. Exceeding the limit could cause electrical shock and

damage to the meter.

1. Insert the black test lead into the negative COM terminal and the red test lead into the

positive Vterminal.

2. Set the function switch to the Vposition.

3. Select the fundamental frequency (50Hz or 60Hz)

with the 50Hz-60Hz push-button. The LCD display

will reflect the selected frequency.

4. Connect the test leads in parallel to the circuit under

test.

5. Read the voltage measurement (V) and frequency

(Hz) on the LCD display. ‘OL’ is displayed when the

measurement exceeds the specified maximum limit.

Note: For measurements lower than 30V, the

meter’s frequency display will indicate ‘0’.

382400 V1.1 06/07

DATA HOLD, MAX-MIN, and PEAK Modes

1. Measure current or voltage as previously described.

2. Press the HOLD button to access the Data Hold mode; an Hicon will be displayed.

Use the Data Hold mode to freeze a displayed reading.

3. Press again to access the MAX mode. In the MAX mode, only the highest reading will

be displayed. The MAX icon will be indicated on the LCD display.

4. Press again to access the MIN mode. In the MIN mode, only the lowest reading will

be displayed. The MIN icon will be indicated on the LCD display.

5. Press again to access the PEAK mode. The PEAK display icon will be indicated on

the LCD display.

6. Press and hold the HOLD button for 3 seconds to return to the normal operating

mode.

Note: The sampling time of the PEAK Mode is 39µS (50Hz) or 33µS (60Hz).

HOLD, MAX and MIN display the TRMS value

Automatic Power OFF

In order to conserve battery life, the meter will automatically turn off after approximately 15

minutes. To turn the meter on again, turn the function switch to the OFF position and then

to the desired function position.

To defeat the Auto Power OFF feature, press and hold the HOLD button while turning the

meter on.

Specifications

AC Current

50/60Hz, Auto Range, True RMS, Crest Factor <4

Conductor should be positioned at the center of the flexible loop

Range Resolution Accuracy *

0 to 300.0 AAC

300.0 to 999.9 A 0.1A

1000 to 3000 A 1A

± 1.0% of range

*Position sensitivity is 2% of range; External field effect of < 40A/m and 200mm from the

coupling is 1% of range; Temperature coefficient is 0.02% of reading/oC.

AC Voltage

50/60Hz, Auto Range, True RMS, Crest Factor <4, Input Impedance 10M ohm, Overload

protection 800V

Range Resolution Accuracy

4.0V to 600.0 VAC 0.1V ± (0.5% reading+ 5 digits)

Frequency

ACV value > 30VAC or ACA value > 30A

Range Resolution Accuracy

45 – 65 0.1 ± 0.2Hz

382400 V1.1 06/07

Probe Specifications

Probe length 24” (610mm)

Bending diameter 1.4” (35mm)

Connector diameter 0.9” (23mm)

Cable diameter 0.5 “(14mm)

Cable length (probe to meter) 6.7” (170mm)

Cable length (meter to output) 6.7” (170mm)

General Specifications

Display Four (4) digit (9999 counts) LCD

Range selection Automatic

Low Battery indication Battery symbol is displayed

Over-range indication ‘OL’ is displayed

Measurement rate 2 readings per second, nominal

Peak Hold Captures peaks 39µS (50Hz) or 33µS (60Hz)

Operating Temperature 14°F to 185 °F (-10°C to 85°C)

Storage Temperature -4°F to 185°F (-20°C to 85°C)

Operating Humidity 15% to 85%

Storage Humidity 15% to 85%

Operating Altitude 7000ft. (2000m) max.

Battery Two (2) 1.5V ‘AA’ batteries

Power consumption 10mA approx.

Auto power OFF After approx. 15 minutes

Weight 15.2 oz. (430g)

Safety For indoor use and in accordance with the requirements for

double insulation to EN61010-1-032 Category III 600V;

Pollution Degree 2.

Approvals CE

382400 V1.1 06/07

Maintenance

WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the

test leads from the input terminals, and turn OFF the meter before opening the case. Do

not operate the meter with an open case.

Inspection

Inspect the clamp for damage before each use; have the unit repaired before use if

damage is evident.

Cleaning and Storage

Periodically wipe the meter and probe with a damp cloth and mild detergent; do no use abr

asives or solvents. If the meter is not to be used for 60 days or more, remove the batteries

and store separately.

Battery Replacement

When the low battery symbol appears on the LCD, replace the two 1.5V

‘AA’ batteries.

1. Remove the center Phillips head screw that secures the rear

battery door (see diagram)

2. Open the battery compartment

3. Replace the 1.5V ‘AA’ batteries

4. Secure the battery compartment

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech 382400 Product Page

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

FAX 781.665.0780 - TestEquipmentDepot.com

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