Extech Instruments TK30 Manuale utente

Owner’s Guide

Model TK30

True RMS Professional Electrical HVAC MultiMeter Test Kit

Introduction

Congratulations on your purchase of the Extech Model TK30 MultiMeter Test Kit. This kit is

housed in a lightweight protective case and includes a MultiMeter, Clamp On Adaptor,

Voltage Detector, Line Splitter, Temperature Probe, and Cables. Operation instructions for

these units are detailed in the supplied manuals and are beyond the scope of this guide.

Model TK30 Version 1.2 July 2002

Contents of Kit

•Model MT330 True RMS MultiMeter

•Model CA330 300A AC Current Clamp

•Model 480172 AC Line Splitter

•Model 40130 Voltage Detector

•Set of 1000V Category III test leads

•Type K thermocouple temperature probe

•Model CA900 Carrying Case

•Operation Manuals for the Models MT330, CA300, and TK30

Current Clamp with MultiMeter

The Current Clamp connects to the MultiMeter as shown and can be used to measure

current for the ranges listed in the Current Clamp’s specifications.

Operation

1. Connect the Current Clamp test

leads to the COM and V inputs of

the MultiMeter.

2. Set the MultiMeter to the V function

range

3. Press the DC/AC button to select

AC (“AC” appears in the display).

4. Press the RANGE button until the

milliVolt range is selected (“mV”

appears in the display).

5. If the anticipated current is less than 10A, zero the meter using the REL button. (see

zeroing note)

6. Clamp around the conductor under test and read the current measurement on the

meter’s LCD.

7. The Clamp outputs 1mV AC for each Ampere of current measured.

Note: The zero offset voltage is approximately 5mV and this voltage is not linear. The

offset will affect low current measurements, but will have little affect on high current

measurements. For the best measurement accuracy, press the Relative button to

zero the meter for currents <10A. Do not zero the meter for currents higher than

10A.

Interpreting the Display

Display Current

005.0 mV 5 amps

020.0 mV 20 amps

250.0 mV 250 amps

3.999

300 AMP AC CLAMP ADAPTOR

OUTPUTVOLTAGE: 1mV AC Per 1A AC

CATII600V

CA300

Model TK30 Version 1.2 July 2002



Support Hotline (781) 890-7440

Tech support: Ext. 200; Email: [email protected]

Repair/Returns: Ext. 210; Email: [email protected]

Website: www.extech.com

Current Clamp and Line Splitter

Line Splitter

The supplied Line Splitter provides a means to cleanly

“open” a standard 120V line cord in order to make clamp

type current measurements. When connected between the

120V AC wall outlet and the device under test, the Current

Clamp can then be clamped on one of the two test

openings in the Splitter. One opening provides a one-to-

one current reading and the other provides a times-ten

(X10) reading so that small current will display with better

resolution on the MultiMeter.

Line Splitter Operation:

Current Measurements

1. Plug the AC Line Splitter into the 120V receptacle

2. Plug the line cord from the load into the AC Line Splitter socket

3. Close the Clamp-on jaws around either the X1 or X10 arm of the AC Line Splitter

4. If the X1 position is used, read the current directly on the meter

5. If the X10 position is used, divide the meter reading by 10 to obtain the actual

current

Voltage Measurements

1. Plug the AC Line Splitter into the 120V receptacle

2. Insert the multimeter test leads into the two Voltage Test jacks

3. Read the voltage on the multimeter

VOLTAGE TEST

LINE SPLITTER

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