Tektronix TX3, TX1, TX-DMM User Manual
TX-DMM TX1 and TX3
True RMS Digital Multimeters
User Manual
070-9880-01
*P070988001*
070988001
Copyright © T ektronix, Inc. All rights reserved. Licensed software products
are owned by T ektronix or its suppliers and are protected by United States
copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as
set forth in subparagraph (c)(1)(ii) of the Rights in T echnical Data and
Computer Software clause at DF ARS 252.227-7013, or subparagraphs (c)(1)
and (2) of the Commercial Computer Software – Restricted Rights clause at
F AR 52.227-19, as applicable.
T ektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
T ektronix, Inc., P.O. Box 500, Beaverton, OR 97077-1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of three (3) years from the date of shipment. If a
product proves defective during this warranty period, Tektronix, at its option, either will
repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the
defect before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to
a location within the country in which the Tektronix service center is located. Customer
shall be responsible for paying all shipping charges, duties, taxes, and any other charges for
products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY
TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF
THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR
HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Contacting Tektronix
Product
support
Service
support
For other
information
To write us
Web site
For questions about using T ektronix measurement
products, call toll free in North America:
1-800-833–9200
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
tm_app_supp@tek.com
For product support outside of North America,
contact your local T ektronix distributor or sales
office.
T ektronix offers extended warranty and calibration
programs as options on many products. Contact
your local T ektronix distributor or sales office.
For a listing of worldwide service centers, visit our
web site.
In North America:
1-800–833–9200
An operator can direct your call.
Tektronix, Inc.
P.O. Box 500
Beaverton, OR 97077-1000
USA
www .tektronix.com
Table of Contents
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front and Rear Panel Overview 1. . . . . . . . . . . . . . . . . . . . . . .
Display Indicators 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Function Knob 4. . . . . . . . . . . . . . . . . . . . . . . . . .
Input Connectors 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safe Test Lead Connections 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Procedures in this Section 7. . . . . . . . . . . . . . . . . . . . . . . .
Voltage Measurements 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application: Using AC DC and AC+DC in Volts Mode 9. .
dB and dBm Voltage Measurements 10. . . . . . . . . . . . . . . . . . . . .
Application: Using a Reference Value Other than
Default 1.000 VRMS in dB Mode 10. . . . . . . . . . . . . . . . .
Application: Using Voltage in a Circuit as the
Reference Value in dB Mode 11. . . . . . . . . . . . . . . . . . . . .
Frequency Measurements 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Negative Edge Triggering 12. . . . . . . . . . . . . . . . . . . . . . . . . .
Positive and Negative Duty Factor 12. . . . . . . . . . . . . . . . . . .
AC vs. DC Coupled Frequency Measurements 13. . . . . . . . . .
Changing Voltage Range in Frequency Mode 13. . . . . . . . . . .
Resistance Measurements
(Ohms, Continuity, Diode, and 50W Range) 14. . . . . . . . . . . .
Application: Measuring Low Resistance Values 14. . . . . . . . .
Capacitance Measurement 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T emperature Measurements (TX3 only) 16. . . . . . . . . . . . . . . . . .
Helpful Tip: Increased Temperature Accuracy 16. . . . . . . . . .
Current Measurements 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TX1 and TX3 True RMS Digital Multimeters
i
T able of Contents
Button and Softkey Overview 19. . . . . . . . . . . . . . . . . . . . . . . . .
Blue Button 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RANGE Button 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M/M/A (Minimum, Maximum, and A verage) Button 19. . . . .
1ms (1 ms Peak Hold) 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backlight Button 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOLD Button 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Hold 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Button (Making Relative (D DELTA) Measurements) 21. .
MEM (Memory) 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Softkeys 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup Menu 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Features 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Resolution (HrES) 50,000-Count Mode 25. . . . . . . . . . .
Beeper 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto-Off 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Up Options 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAX/MIN/AVG Operation 28. . . . . . . . . . . . . . . . . . . . . . . . .
Auto Fuse Detection 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup for Optional Computer Interface
Accessory (WSTRM) 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Protective Boot and Versa-Stand 46. . . . . . . . . . . . . . .
Battery Replacement 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing TX Series Multimeters 48. . . . . . . . . . . . . . . . . . . . . .
General Care and Cleaning 51. . . . . . . . . . . . . . . . . . . . . . . . . .
Index 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii
TX1 and TX3 True RMS Digital Multimeters
General Safety Summary
Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it. T o avoid
potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or Personal Injury
Connect and Disconnect Properly. Do not connect or disconnect probes
or test leads while they are connected to a voltage source.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all
ratings and markings on the product. Consult the product manual for
further ratings information before making connections to the product.
Do not apply a potential to any terminal, including the common
terminal, that exceeds the maximum rating of that terminal.
Replace Batteries Properly. Replace batteries only with the proper type
and rating specified.
Do Not Operate Without Covers. Do not operate this product with
covers or panels removed.
Use Proper Fuse. Use only the fuse type and rating specified for this
product.
Avoid Exposed Circuitry. Do not touch exposed connections and
components when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
TX1 and TX3 True RMS Digital Multimeters
iii
General Safety Summary
Safety Terms and Symbols
Terms in This Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that
could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.
Terms on the Product. These terms may appear on the product:
CAUTION indicates a hazard to property including the product.
Symbols on the Product. These symbols may appear on the product:
WARNING
Risk of
Electric Shock
iv
CAUTION
Refer to Manual
TX1 and TX3 True RMS Digital Multimeters
Double
Insulated
Front and Rear Panel Overview
1
2
3
4
5
6
7
8
9
10
FUSED 600V
15A/30 SECONDS
CATIII
10A
1000V
1 Extra large LCD display with dual numerical readout.
2 Measurement function knob – Use to select a measurement.
Blue Button – Use to access 1ms, MEM, and Setup menu.
3
4 RANGE Button – Use to set measurement range.
5 M/M/A Button – Use to set meter to MIN/MAX/AVG or 1ms modes.
6 Softkeys – Use with measurement function knob to select measurements.
7 Backlight Button – Use to turn backlight on and off.
8 HOLD Button – Use to freeze display.
9 D Button – Use to make relative measurements and access the memory.
10 Input connectors.
TX1 and TX3 True RMS Digital Multimeters
1
Front and Rear Panel Overview
1
Auto Off
2
3
4
5
1 Press and hold options – Activate by holding down the specified button for two
seconds while the meter is on.
2 Power-up options – Activate by holding down the specified button while turning
on the meter.
3 Compliance and battery and fuse replacement information.
4 Serial number and barcode tag.
5 Removable battery cover.
2
TX1 and TX3 True RMS Digital Multimeters
Display Indicators
Front and Rear Panel Overview
6
1
2
3
4
5
1
Special feature indicators
2 Low battery indicator
3 Delta indicator
4 Blue button and memory
mode indicators
5 Bargraph
7
8
9
10
11
6 Upper display
7 Upper display units
8 Main display
9 Main display units
10 Range indicators
11 Softkey menus
TX1 and TX3 True RMS Digital Multimeters
3
Front and Rear Panel Overview
Measurement Function Knob
TX1
TX3
OFF. Turns of f the meter. Setup parameters and stored measurements
are saved.
V. Volts AC RMS, Volts DC, Volts AC DC dual display, Volts
AC+DC total RMS, dB, and dBm.
Hz. Frequency measurements. Duty factor also shows if it is turned
on in the Setup menu.
W/ . Access to resistance and continuity measurements and diode
test.
. Capacitance measurements.
_C. Temperature measurements in degrees Celsius or Fahrenheit.
A. Amps AC RMS, Amps DC, Amps AC + DC total RMS, Amps AC
DC dual display, and Amps DC 4-20 mA% (process control loop
measurement).
4
TX1 and TX3 True RMS Digital Multimeters
Input Connectors
Front and Rear Panel Overview
FUSED 600V
10A
15A/30 SECONDS
CATIII
1000V
A. Input connector for current measurements up to 10 A (15 A for 30
seconds). Rating is 600 V open circuit voltage.
COM. Common connector. All measurements are referenced to this
connector.
V. Input connector for volts, frequency, ohms, continuity, diode,
capacitance, and temperature measurements. Rating is 1000V
CAT III for all V. input connector measurements.
WARNING. To avoid personal injury, do not attach meter leads with
the battery cover removed.
CAUTION. To avoid damaging the meter, do not attempt to measure
current with the batteries removed.
TX1 and TX3 True RMS Digital Multimeters
5
Operating Basics
Before you take any of the measurements described in this section,
follow these steps:
H For specified accuracy, allow the meter to stabilize for 30
seconds after you turn on the meter.
H Observe the safe test lead connections below when you remove
the test leads from the meter.
H Always disconnect power to the circuit when you measure
resistors, capacitors, diodes, or continuity within the circuit.
H Discharge capacitors before taking capacitance measurements.
Safe Test Lead Connections
T o safely disconnect the test leads from the meter, first disconnect all
test leads from the circuit being tested, then disconnect the leads
from the input connectors.
WARNING. To prevent electrical shock, do not insert unnecessary test
leads or metal pins into the A (amps) connector. Voltages applied to
any connector may be present at all other input connectors. Only use
the test leads supplied or recommended (or their equivalent) with the
meter. Refer to Accessories on page 43.
6
TX1 and TX3 True RMS Digital Multimeters
Operating Basics
Using Procedures in this Section
All measurements are made by first setting the measurement function
knob to a function setting and then selecting a measurement from the
softkeys. Note that not all knob settings have corresponding softkey
settings.
For example, the steps below show how to make a DC voltage
measurement:
1. Set the measurement function knob to V for a voltage measure-
ment.
2. Select softkey 2 for DC voltage.
3. Connect the leads to the measurement points.
TX1 and TX3 True RMS Digital Multimeters
7
Operating Basics
AC DC ( ress
Voltage Measurements
Measurement Softkey Connect leads
True RMS AC voltage
AC
(default)
DC voltage
AC DC dual display
DC
AC DC or
AC+DC (press to
AC+DC total RMS
1
V
+ VAC2) VDC
RMS
1
Ǹ
toggle)
2
Main
display
Upper
display
AC Hz
DC ––
DC AC
AC+DC Hz
8
TX1 and TX3 True RMS Digital Multimeters
Operating Basics
Application: Using AC DC and AC+DC in Volts Mode
DC = 5 V
AC = 1V
RMS
Frequency = 60 Hz
AC voltages riding on power supplies can cause problems with
electronic circuits. If you set the meter to DC Volts mode, the display
shows the DC component of 5.000 V. However, the AC component
may be missed. It is recommended that you set the meter to AC DC
dual display mode. The main display shows the 5.000 V DC voltage
and the upper display shows the 1.000 V AC voltage. AC DC mode
also allows you to simultaneously make AC and DC measurements
without changing the meter settings.
Another useful measurement is AC+DC total RMS. T o take this
measurement, press softkey 3 to toggle to AC+DC. In the above
example, the total RMS of 5.099 V shows on the main display and
the frequency of 60.00 Hz shows on the upper display. When
calculating the power dissipated in a circuit component, it is critical
that the DC value is factored into the equation V
V
is AC+DC total RMS.
RMS
TX1 and TX3 True RMS Digital Multimeters
RMS
I
RMS
, where
9
Operating Basics
dB and dBm Voltage Measurements
Main
Measurement Softkey Connect leads
dB (TX3 only)
1
dB or dBm
display
AC dB
(press to toggle)
dBm (TX3 only)
1
dB readout = 20 log (main display readout/ref), where ref = 1 V is the default.
2
dBm readout = 10 log (main display readout2/R), where R=600 W.
2
AC dBm
Application: Using a Reference Value Other than Default 1.000 V
in dB Mode
T o manually change the reference voltage in dB mode, press and
hold the blue button to display the Setup menu. Adjust the rEF (dB)
value to the value you want and press softkey 4 for OK. Subsequent
dB measurements will use this stored value as the reference voltage
until you turn off the meter.
Upper
display
RMS
10
TX1 and TX3 True RMS Digital Multimeters
Operating Basics
Application: Using Voltage in a Circuit as the Reference Value
in dB Mode
An example of using a voltage in a circuit as the reference value is
measuring the AC voltage gain of an amplifier. Set the meter to dB
mode and measure the voltage that you want to use for the reference
(the input of the amplifier). Press the button to save the measured
value as the reference value. Next, measure the output of the
amplifier. The voltage gain of the amplifier (in dB) shows in the
upper display.
In both of these applications, the indicator shows in the upper
display to indicate the reference is a voltage other than the default
value of 1.000 V
. The reference value returns to 1.000 V when
RMS
you exit dB mode.
TX1 and TX3 True RMS Digital Multimeters
11
Operating Basics
(
)
Frequency Measurements
Main
Measurement Softkey Connect leads
Frequency
Frequency and duty factor
dual display
1
Displayed when you set negative edge triggering in the Setup menu. –EdGE is active
but not displayed when % duty is on.
2
You must turn on positive or negative duty in Setup menu.
no selection
display
Hz – EdGE
Hz % Duty
Negative Edge Triggering
To trigger on the negative edge of the waveform, set EdGE to nEG in
the Setup menu. The word -EdGE shows in the upper display when
you exit the Setup menu.
Positive and Negative Duty Factor
T o measure duty factor, set duty (POL in the Setup menu) to either
POS or nEG. When you measure negative duty factor, a “–” symbol
shows in the upper display.
Positive duty factor:
% duty = (a/b) 100
b
a
Upper
display
1
2
Negative duty factor:
% duty = (1–a/b) 100
12
TX1 and TX3 True RMS Digital Multimeters
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