Extech Instruments TK30 User manual

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
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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
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Support Hotline [phone]
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
Copyright ©2002 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or in part in any form.
VOLTAGE TEST
LINE SPLITTER