Extech Instruments 38389 Manuale utente

User’s Guide

600A True RMS AC/DC

Clamp Meter

Model 38389

38389-en-US_V2.8 4/15

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 input range of any function

Do not apply voltage to meter when resistance function is selected.

Set the function switch OFF when the meter is not in use.

Remove the battery if meter is to be stored for longer than 60 days.

WARNINGS

Set function switch to the appropriate position before measuring.

When measuring volts do not switch to current/resistance modes.

Do not measure current on a circuit whose voltage exceeds 600V.

When changing ranges using the selector switch always disconnect the test leads from the

circuit under test.

Do not exceed the maximum rated input limits.

A UL mark does not indicate that this product has been evaluated for the accuracy of its readings.

38389-en-US_V2.8 4/15

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 before replacing the battery or fuses.

Inspect the condition of the test leads and the meter itself for any damage before operating the

meter. Repair or replace any damage before use.

Use great care when making measurements if the voltages are greater than 25VAC rms or

35VDC. These voltages are considered a shock hazard.

Remove the battery if the meter is to be stored for long periods.

Always discharge capacitors and remove power from the device under test before performing

Diode, Resistance or Continuity tests.

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.

Input Limits

Function Maximum Input

A AC, A DC 600A

V DC, V AC 600V DC/AC

Resistance, Capacitance, Diode Test 250V DC/AC

Temperature 60V DC, 24V AC

38389-en-US_V2.8 4/15

710

Meter Description

1. Current clamp

2. Data Hold button

3. Peak Hold button

4. Mode select button

5. ZERO button

6. LCD display

7. COM input jack

8. Clamp trigger

9. Rotary Function switch

10. V/Ω/CAP/TEMP jack

1. AC (alternating current) and DC (direct currrent)

2. Minus sign

3. 4000 count (0 to 3999) measurement reading

4. AutoRange mode

5. Peak Hold mode

6. Diode test mode

7. Audible Continuity

8. Data Hold mode

9. ZERO (Relative) mode

10. Low Battery icon

11. Units of measure list

45678910

1

2

3

11

38389-en-US_V2.8 4/15

Specifications

Function Range & Resolution Accuracy (% of reading)

DC Current 400.0 ADC 0 to 70A: ± (2.5% + 0.6A)

70 to 300A: ± (3.0% + 0.3A)

300 to 400A ± (3.5% + 0.3A)

600 ADC 0 to 150A: ± (2.5% + 4A)

151 to 350A: ± (3.0% + 4A)

351 to 600A: ± (4.0% + 6A)

AC Current 400.0 AAC 0 to 70A: ± (3.0% + 0.6A)

70 to 300A: ± (3.5% + 0.3A)

300 to 400A ± (3.5% + 0.6A)

600 AAC 0 to 150A: ± (3.0% + 4A)

151 to 350A: ± (3.5% + 5A)

351 to 600A: ± (4.0% + 8A)

DC Voltage 400.0 mVDC ± (0.5% + 5 digits)

4.000 VDC

± (1.2% + 3 digits)

40.00 VDC

400.0 VDC

600 VDC ± (1.5% + 3 digits)

AC Voltage 4.000 VAC ± (1.0% + 5 digits)

40.00 VAC ± (1.5% + 3 digits)

400.0 VAC

600 VAC ± (2.0% + 4 digits)

Resistance 400.0



± (1.0% + 4 digits)

4.000K



± (1.5% + 2 digits)

40.00K



400.0K



4.000M



± (2.0% + 3 digits)

40.00M



± (3.0% + 5 digits)

Temperature -4 to 1400oF ± (3.0% + 5 oF)

-20 to 760 oC ± (3.0% + 3 oC)

Capacitance 40.00 nF ± (5.0% + 7 digits)

400.0 nF ± (3.5% + 5 digits)

4.000 uF

40.00 uF

100.0 uF ± (5.0% + 5 digits)

38389-en-US_V2.8 4/15

Clamp size Opening 1.3" (33mm) approx.

Diode Test Test current of 0.3mA typical;

Open circuit voltage 1.5V DC typical.

Continuity Check Threshold <50; Test current < 1mA

Low Battery Indication “BAT” is displayed

Overrange Indication “1 “ is displayed

Measurements Rate 2 per second, nominal

Peak detection Response time < 10ms

Temperature sensor Type K thermocouple

Input Impedance 7.8M(VDC and VAC)

Display 3-3/4 digits (4000 counts) LCD

AC bandwidth 50/60Hz (AAC and VAC)

AC response True rms (AAC and VAC)

Operating Temperature 14 to 122oF (-10 to 50oC)

Storage Temperature -14 to 140oF (-30 to 60oC)

Relative Humidity 90% (0oC to 30oC); 75% (30oC to 40oC); 45% (40oC to 50oC)

Altitude Operating: 3000m; Storage 10,000m

Over voltage Category II 600V

Battery 9V Battery

Auto OFF After 15 minutes of inactivity

Dimensions/Weight 8x3.2x1.7" (204x80x43mm)/0.62 lbs. (281g)

Safety For indoor use and in accordance with Overvoltage Category II, Pollution

Degree 2. Category II includes local level, appliance, portable equipment,

etc., with transient overvoltage less than Overvoltage Cat. III

38389-en-US_V2.8 4/15

Operation

NOTICES: Read and understand all warning and precaution statements listed in the safety

section of 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/DC 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 600 or 400A range. If the range of the

measured is not known, select the higher range first then move to the lower

range if necessary.

2. Select AC or DC with the AC/DC button. Press the zero button to zero the

meter in the DCA mode only.

3. Press the trigger to open jaw. Fully enclose one conductor to be measured.

4. The clamp meter LCD will display the reading.

AC/DC Voltage Measurements

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 V position.

3. Select AC or DC with the AC/DC button.

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

5. Read the voltage measurement on the LCD display.

Resistance and Continuity Measurements

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

lead into the positive terminal.

2. Set the function switch to the •))) CAP position.

3. Use the multifunction button to select resistance.

4. Touch the test probe tips across the circuit or component under test. It is best to disconnect

one side of the device under test so the rest of the circuit will not interfere with the resistance

reading.

5. For Resistance tests, read the resistance on the LCD display.

6. For Continuity tests, if the resistance is < 30, a tone will sound.

Yes

38389-en-US_V2.8 4/15

Capacitance Measurements

WARNING: To avoid electric shock, discharge the capacitor under test before measuring.

1. Set the function switch to the •))) CAP Position.

2. Press the multifunction button to select the capacitance function.

3. Insert the black test lead banana plug into the negative (COM) jack and

the red test lead banana plug into the positive jack.

4. Touch the test probe tips across the part under test.

5. Read the capacitance in the display.

6. The display will indicate the proper decimal point and value.

Temperature Measurements

WARNING: To avoid electric shock, disconnect both test probes from any

source of voltage before making a temperature measurement.

1. Set the function switch to TEMP.

2. Insert the Temperature Probe into the negative (COM) and the positive

jacks, making sure to observe the correct polarity.

3. Touch the Temperature Probe head to the part whose temperature you

wish to measure. Keep the probe touching the part under test until the

reading stabilizes (about 30 seconds).

4. Read the temperature in the display. The digital reading will indicate the

proper decimal point and value.

WARNING: To avoid electric shock, be sure the thermocouple has been

removed before changing to another measurement function

Data Hold

To freeze the LCD meter reading, press the data hold button. The data hold

button is located on the left side of the meter (top button). While data hold is

active, the DH display icon appears on the LCD. Press the data hold button again to return to

normal operation.

Peak Hold

To hold the highest reading on the LCD, press the peak hold button. The peak hold button is located

on the left side of the meter (bottom button). The meter reading will not change as readings change,

rather it will only display the highest reading encountered since the peak hold button was pressed.

Press the peak hold button again to return to normal operation.

CAP

38389-en-US_V2.8 4/15

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 with open

case.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If

the meter is not to be used for periods of longer than 60 days, remove the battery and store it

separately

Battery Replacement

1. Remove the Phillips head screw that secures the battery door.

2. Open the battery compartment

3. Replace the 9V battery

4. Replace and secure the door.

Temperature Probe Replacement

The replacement bead wire probe with banana plug connectors is p/n TP873.

To use type k probes with a mini plug connector requires a mini-plug to banana plug converter.

38389-en-US_V2.8 4/15

Warranty

FLIRSystems,Inc.warrantsthisExtechInstrumentsbranddevice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forauthorization.Visit

thewebsitewww.extech.comforcontactinformation.AReturnAuthorization(RA)numbermustbeissuedbeforeanyproductis

returned.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.FLIRSystems,Inc.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.FLIR’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,Repair,andCustomerCareServices

FLIRSystems,Inc.offersrepairandcalibrationservicesfortheExtechInstrumentsproductswe

sell.NISTcertificationformostproductsisalsoprovided.CalltheCustomerServiceDepartmentfor

informationoncalibrationservicesavailableforthisproduct.Annualcalibrationsshouldbe

performedtoverifymeterperformanceandaccuracy.Technicalsupportandgeneralcustomer

serviceisalsoprovided,refertothecontactinformationprovidedbelow.



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

www.extech.com

SupportLines:U.S.(877)439‐8324;International:+1(603)324‐7800

TechnicalSupport:Option3;E‐mail:[email protected]

Repair&Returns:Option4;E‐mail:[email protected]

Productspecificationsaresubjecttochangewithoutnotice

Pleasevisitourwebsiteforthemostup‐to‐dateinformation

www.extech.com

FLIRCommercialSystems,Inc.,9TownsendWest,Nashua,NH03063USA

ISO9001Certified

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