Extech Instruments 380652 Manuale utente

User's Guide

Mini Clamp-On DMM

Model 380652

Introduction

Congratulations on your purchase of the Extech Mini Clamp-On DMM. This meter

measures and displays Voltage, Current, and Resistance. The DCA zero adjustment

permits relative and offset DC current measurements. Careful use of this meter will provide

years of reliable service.

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 380652 Product Page

Model 380652 Version 3.0 June 20052

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 (781) 890-7440 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.

Specifications

General Specifications

Display 3 ½ digit (±1999 display counts) LCD

Measurements AC/DC Voltage, AC/DC Current, and Resistance

Polarity Automatic Switching; ‘-’ indicates negative polarity

Current Sensor Hall effect sensor

Zero Adjustment Adjustment dial for DC Current zero

Over-input Display indicates ‘1’ or ‘-1’

Sampling Time Approximately 0.4 seconds

Time Base Quartz crystal (32.768 KHz)

Battery 9V battery

Power Consumption Approximately 6mADC (Voltage & Resistance)

Approximately 12mADC (Current range)

Operating Temp 32 to 122oF (0 to 50oC)

Operating Humidity Less than 80% Relative Humidity

Weight 0.5 lbs. (225g) - including battery

Dimension 7.1 x 1.9 x 1.4’ (180 x 47 x 35mm)

Max. Conductor size 19 φ [0.75’ (19mm) diameter]

Accessories Instruction manual, test leads, and carrying case

Range Specifications

Function Range Resolution Accuracy

Overload

Protection

DCV 200V 0.1V ± (0.8%rdg + 1d)

ACV (50/60 Hz) 500V 1V ± (1%rdg + 2d)

AC 500V rms

DC ±500V

Resistance 200Ω0.1Ω± (1.2%rdg + 1d) AC/DC 400V

AC Current

(50/60 Hz)

20A/

200A

0.01A / 0.1A ± (1.2%FS + 5d)

DC Current 200A 0.1A ± (1.2%FS + 5d)

300 ACA

(for 1 min.)

DATA HOLD Freezes displayed reading. Available on all functions.

Note: The input impedance for ACV & DCV ranges is 10MΩ

Model 380652 Version 3.0 June 20053

Meter Description

1. Measuring Jaw

2. Jaw Trigger

3. 20A / 200A AC Select Switch

4. DCA Zero Adjust Dial

5. Power/Data Hold Select Switch

6. AC / DC Select Switch

7. Volts / Amps / Resistance Select Switch

8. LCD display

9. Input Terminal for Voltage

10. COMMON input terminal

11. Resistance Input Terminal

Safety

1. Ensure that the DC 9V battery is connected correctly to its snap terminal and placed in

the battery compartment.

2. Slide the ‘Off/On/Hold’ switch to the ON position, (except when using the DATA HOLD

function).

3. Place the RED test lead into the proper input terminal before making measurements.

4. Remove the test leads from the circuit under test when changing the measurement

range.

5. Do not exceed the maximum rated input voltage.

6. Always put the ‘On/Off/Hold’ switch to the OFF position when the instrument is not in

use.

7. Remove the battery when the instrument is to be stored.

8. International Safety Symbols:

Model 380652 Version 3.0 June 20054

Operation

Voltage Measurements

1. Slide the Off/On/Hold switch to the ON position.

2. Slide the V/A/Ωswitch to the Vposition.

3. Connect the red test lead to the Vinput terminal and the black test lead to the COM

input terminal.

4. If the voltage to be measured is AC, slide the AC/DC switch to the AC position.

5. If the voltage to be measured is DC , slide the AC/DC switch to the DC position

6. Connect test lead probes to the circuit under test.

7. Read voltage values on the LCD.

Resistance Measurements

1. Slide the Off/On/Hold switch to the ON position.

2. Slide the V/A/Ωswitch to the Ωposition.

3. Connect the red test lead to the Ω input terminal and the black test lead to the COM

input terminal.

4. If the resistance being measured is in a circuit, remove all power to that circuit and

discharge all capacitors.

5. Connect test lead probes to the circuit (resistance) under test.

6. Read the resistance values on the LCD.

Note: There are small stray resistances (approx. 0.8 ohms) in the test leads. Before

taking measurements short the test leads and note the meter reading. After taking a

measurement, deduct the stray resistance value (noted earlier) from the displayed

reading.

AC Current Measurements

1. Slide the Off/On/Hold switch to the ON position.

2. Slide the V/A/Ωswitch to the Aposition.

3. Slide the AC/DC switch to the AC position.

4. Determine the highest anticipated current (200A, 20A)

and set the 20A/200A switch to the appropriate position.

5. Press the trigger to open the current jaw. Clamp around

the conductor under test.

6. Read ACA values on the digital display.

DC Current Measurements

1. Slide the Off/On/Hold switch to the ON position.

2. Slide the V/A/Ωswitch to the Aposition

3. Slide the AC/DC switch to the DC position.

4. Slide the 20A/200A switch to the 200A position.

5. Adjust the DCA Zero knob for a zero reading.

6. Press the trigger to open the current jaw. Clamp around the conductor under test.

7. Read DCA values on the digital display.

Measurement Considerations

The core of the current jaw may retain magnetism after use. If this happens the display

may not reach zero when adjusting the DCA zero dial. To correct this, either:

a. Change the direction of the measured DC current, or

b. Forcefully snap the jaws open and close several times.

Data Hold

While taking measurements slide the Off/On/hold switch to the Hold position to freeze the

displayed reading. To return to normal operation, slide the switch to the ON position.

Maintenance

Battery Replacement

When the battery power drops below the acceptable operating voltage (approx. 7V), the

LO BAT icon appears on the LCD display. This indicates that the battery needs to be

replaced soon. However, in-spec measurements can still be made for several hours after

the low battery indicator appears. To replace the battery:

1. Open the battery compartment with a screwdriver or small coin.

2. Replace the 9V battery and secure the compartment cover.

Cleaning

Use only a dry cloth to clean the plastic case. Do not use solvents, abrasives, or harsh

detergents.

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 380652 Product Page

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

FAX 781.665.0780 - TestEquipmentDepot.com

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