Tenma 72-8710 User manual

OPERATING
MANUA L

Introduction
Dear valued customer,
Thank you for purchasing a Tenma instrument. To use your new product correctly, make sure you read this User Manual
carefully and completely before operation and pay particular attention to the “Safety Instructions” section.
Please keep this User Manual in a safe place after reading it carefully. For easy reference during future operation, we
recommend putting it alongside your Tenma product or in an easily accessible place.

Copyright Information
● Tenma . All rights reserved.
● products are protected by patents granted and pending in the People's Republic of China and other countries.
● The Company reserves the right to change product specifications and prices.
all rights reserved. All licensed software products are properties of Tenma its subsidiaries or
suppliers. They are protected by the national copyright law and international conventions.
Information contained in this manual supercedes all information in previously published versions.
is the registered trademark of Farnell.
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If this product is sold or assigned by the original purchaser to a third is to be delivered to an address within the country where the
party within three years of purchase, the new owner should note maintenance centre operates, Tenma shall pay the cost of returning the
that warranty is available for a period of three years from the day product to the
the original purchaser acquired the product from Tenma or an destination, all freight, custom duty, tax and other costs will be paid by
authorized dealer. The probe, other accessories and fuses are not the customer.
covered by warranty.
This warranty does not apply to any defect, malfunction or damage
If any genuine defect is found during the valid warranty period, Tenma caused by accident, normal wear and tear of mechanical parts, any
has the option to repair the defective product without any charge for form of application other than the stated ones, improper use, improper
parts or labor, or replace it with another product (at the discretion of maintenance or poor maintenance. Under the warranty terms and
Tenma). Tenma may use parts, modules and replacement products that conditions, Tenma has no obligation to provide the following services :
are brand new or repaired to a good-as-new standard. All old parts,
modules and products that are removed during replacement become a) Repairing any damage arising from installation, repair or
properties of Tenma. maintenance carried out by a non Tenma service representative;
b) Repairing any damage arising from improper use or connection
In this User Manual, “customer” means an individual or entity
to incompatible equipment;
vested with the rights hereunder. To enjoy the warranty service,
the “customer” must report any defect to Tenma during the valid c) Repairing any damage or malfunction arising from using a power
warranty period and make appropriate arrangement to allow source not provided by Tenma;
servicing. The customer should pack the defective product in a
d) Servicing a product that has been modified or integrated with other
container and deliver it to a maintenance centre specified by Tenma.
products (such modification or integration makes repair more
The customer should also prepay all freight cost and provide a copy of
time consuming and difficult).
the original sales receipt issued to the original purchaser. If the product
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To avoid fire and personal injury :
supercedes all other previous warranties, whether express or
implied. Tenma and its dealers will not make any implied Use a correct power cable : Use only the specified power cable which
guarantee on the salability or suitability of this product for any specific is authorized in the country of use.
purpose. In the event of breach of warranty terms and conditions, repair Remove the plug correctly : Do not remove the probe or testing cable
or replacement of the defective product shall be the only remedial when they are connected to power.
measure offered by Tenma. Notwithstanding any prior notification of
Ensure good grounding : This unit is grounded by the ground wire of
potential damage that is indirect, special, consequential or inevitable,
the power cable. To avoid electric shock, the grounding conductor must
Tenma and its dealers shall bear no liability for any such damage.
touch the ground. Before connecting the input or output terminal,
ensure the unit is properly grounded.
Safety Instructions
Connect the probe of the digital storage oscilloscope : The probe
This unit is designed and manufactured strictly in accordance with ground cable is the same as ground potential. Do not connect the
GB4793 safety requirements for electronic testing meters and ground cable to non ground voltage or high voltage.
IEC61010-1 safety standards. It fully meets CAT II 600V insulation and
Check the rated values of all terminals : To prevent fire and
overvoltage requirements and Grade II anti-pollution safety standards.
excessive current shock, please check all rated values and label data.
To prevent personal injuries and damage of this unit or any other
Read the manual carefully and check the rated values before
devices connected to it, please take note of the following safety
connecting the unit.
precautions. To avoid potential hazards, use this unit strictly as
instructed by this User Manual. Do not operate the unit with the chassis cover open : Do not operate
this unit when the outer cover or front panel is open.
Maintenance should only be carried out by a trained professional.
This warranty is made available to this product specifically and
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Use suitable fuses : Only use specified fuse types and rated
Messages on the product : The following messages may appear
specifications.
on the product :
Avoid exposing circuitry : When power is on, never make contact with “Danger” means potential damage that is immediate.
exposed adaptor or components. “Warning” means potential damage that is not immediate.
When fault is suspected, stop operation : If you suspect a fault, ask a “Caution” means possible damage to this product or other
qualified maintenance professional to carry out inspection. properties.
Icons on the product : The following icons may appear on the
Maintain good ventilation. product :
Do not operate in humid conditions.
Do not operate in combustible and explosive conditions.
High voltage Caution! Refer to manual
Keep the product surface clean and dry.
Safety Messages and Symbols
Safety terminology used in this manual. The following messages may Protective Ground terminal Ground terminal
appear in this manual : ground terminal for chassis for testing
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 unit or other properties
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Preface DSO oscilloscopes offer user-friendliness, outstanding technical
indicators and a host of advanced features. They are your perfect tools
This manual provides information on the operation of the DSO digital
to complete testing tasks swiftly and efficiently.
storage oscilloscopes series. Guidance is given in several chapters
as follows : This manual is a user guide for two models of the digital storage
oscilloscope series :
Chapter 1 User Guide : Simple guide to oscilloscope functions
and installation. Model Bandwidth Real-time Sampling Rate Display
Chapter 2 Instrument Setups : Guide to operation of the DSO 72-8705 50MHz
digital storage oscilloscope series. 72-8710 100MHz
Chapter 3 Practical Example Illustrations : Example illustrations
are provided to solve various testing problems.
Chapter 4 System Prompts and Trouble-shooting :
Chapter 5 Servicing and Support :
Chapter 6 Appendixes :
Appendix A : Technical Indicators
Appendix B : Accessories for DSO Series Digital Storage
Oscilloscopes
Appendix C : Maintenance and Cleaning
Appendix D: Chinese and English Cross Reference Table for the
Front Panel
The DSO Digital Storage Oscilloscopes Series
1GS/s Color
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DSO Oscilloscopes offer a user-friendly front panel with clear Dual analog channels; width range : mV/div ~ 20V/div
indications to allow access to all basic functions for easy operation. High definition color LCD system, 400 x 240 resolution
The scaling and position buttons for all channels are optimally Supports plug-and-play USB storage device. Communication
arranged for intuitive operation. As design is based on the familiar with and remote control of computer through the USB device
practices of traditional instruments, users can use the new units Automatic waveform and status configuration
without spending considerable time in learning and familiarizing Storage of waveforms, setups and interfaces; waveforms and
with operation. For faster adjustment to ease testing, there is a [AUTO] setups reproduction
key to instantly display the appropriate waveform and range position. Fine window extension; precise analysis of waveform details and
Apart from being extremely user-friendly, DSO Oscilloscope have the overview
high performance indicators and superb functions required for Automatic measurement of 28 waveform parameters
speedy execution of measurement tasks. Thanks to 1GS/s real-time Automatic cursor tracing measurement function
sampling and 25GS/s equivalent sampling, you can observe higher Unique waveform recording and replay function
speed signals with your DSO Oscilloscope. The strong trigger and Built-in FFT
analytical functions make it easy to acquire and analyse waveforms, Multiple waveform mathematics functions (including add,
while the sharp and clear LCD and mathematics functions ensure subtract, multiply and divide)
clear observation and reliable analysis of signal conditions.Edge, pulse width and alternate trigger functions
Multilingual menu displays
Help messages in English and Chinese
The performance features listed below will explain why the DSO series
can fully satisfy your testing and measurement requirements:
1
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DSO accessories :
2 x 1.2m, : / : probe. For details refer to the probe
instructions. These accessories conform with
EN 1010-0 1:2008 standards
Power line conforming to international standards applicable in
the country of use
User Manual
USB connecting cable :
UT-D05 (two-terminal USB/HOST plug)
DSO oscilloscope communication control software (USB-
device)
1 1 10 1
6 3
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Table of Contents
Item Page
Safety Instructions
Preface
Chapter 1 User Guide-------------------------------------------------------------------------------
General Inspection----------------------------------------------------------------------
Functional Check------------------------------------------------------------------------
Probe Compensation--------------------------------------------------------------------
Automatic Setup for Waveform Display-------------------------------------------------
Getting to Know the Vertical System----------------------------------------------------
Getting to Know the Horizontal System-------------------------------------------------
Getting to Know the Trigger System----------------------------------------------------
Chapter 2 Instrument Setups-----------------------------------------------------------------------
Setting the Vertical System--------------------------------------------------------------
Setting the Horizontal System-----------------------------------------------------------
Setting the Trigger System--------------------------------------------------------------
Alternate Trigger-------------------------------------------------------------------------
Setting the Sampling System----------------------------------------------------------
Setting the Display System----------------------------------------------------------
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15
15
18
18
19
20
22
24
25
33
37
41
45
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Item Page
Storage and Recall ----------------------------------------------------------------------
Utility Function Setup--------------------------------------------------------------------
Automatic Measurement-------------------------------------------------------------
Cursor Measurement -------------------------------------------------------------------
Using the Run Button--------------------------------------------------------------------
Chapter 3 Practical Example Illustrations----------------------------------------------------------
Illustration 1 : Measuring simple signals------------------------------------------------
Illustration 2 : Observing the delay and time-lapse caused by a
sine wave signal passes through the circuit ---------------------------------------------------
Illustration 3 : Acquiring single signals--------------------------------------------------
Illustration 4 : Reducing random noise of signals---------------------------------------
Illustration 5 : Using the cursors for measurement-------------------------------------
Illustration 6 : Using the X-Y function----------------------------------------------------
Illustration 7 : Using the USB upgrade programme-------------------------------------
Illustration 8 : Screen copy---------------------------------------------------------------
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52
55
60
61
63
63
64
65
66
68
69
70
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Item Page
Chapter 4 System Prompts and Trouble-shooting--------------------------------------------------------
Definitions of System Prompts--------------------------------------------------------------------
Troubleshooting--------------------------------------------------------------------------------------
Chapter 5 Technical Indicators---------------------------------------------------------------------------------
Appendix A : Technical indicators----------------------------------------------------------------
Appendix B : Accessories for DSO Series Digital Storage Oscilloscope ------
Appendix C : Maintenance and Cleaning-----------------------------------------------
Index --------------------------------------------------------------------------------------------
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front panel. The functions of knobs are similar to other Oscilloscopes.
Chapter 1 User Guide On the right you will find the screen copy key (PrtSc) which enables you
Your DSO Series digital storage oscilloscope is a small and compact to save the current screen in an external USB device in picture format
benchtop device. The user-friendly front panel enables easy operation. and five menu operation keys (designated as [F1] to [F5] from top
This chapter will guide you through basic testing steps. down). With these keys you can set up different options of the current
menu. The other keys are function keys. You can use them to enter
This chapter provides notes on the following :
different function menus or access particular functions directly.:
General inspection
Functional check
Probe compensation
Automatic setups for waveform display
Getting to know the vertical system
Getting to know the horizontal system
Getting to know the trigger system
When beginning to use your DSO oscilloscope first familiarize yourself
with the front panel. This chapter briefly describes the operation and
functions of the front panel, so you can get started with your DSO series
digital storage oscilloscope as quickly as possible.
Your DSO oscilloscope comes with a front panel with at-a-glance
functions for easy operation. There are knobs and function keys on the
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Figure 1-1 DSO Series Digital Storage Oscilloscope
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External trigger
inputt
Probe compensation
signal output
Vertical controls
Horizontal controls
Trigger controls
Operation
controls
Frequently
Used Menus
Multifunction
control knob
Analog
signal input
USB Host
interface
Figure 1-2 Schematic Diagram of the DSO Front Panel
DSO Series User Manual

Figure 1-3 Schematic diagram of the display interface
Trigger status display
Displaying the horizontal trigger position
Displaying the central graticule time
Displaying the vertical
graticule factor of the
channel
Displaying main
time base setup
Waveform
display window
The menu varies with
individual function keys
CH1 icon
Ch2 icon
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DSO Series User Manual

General Inspection Functional Check
Carry out a quick functional check in the following steps to make sure
We suggest checking your new DSO oscilloscope in the following
your oscilloscope is operating normally.
steps.
1. Check the unit for possible shipping damages 1. Power on the unit
If the package carton or foam plastic protective lining is seriously Power on the unit. AC power supply voltage range is 100V AC to 240V
damaged, please arrange for exchange immediately. AC, frequency Hz-Hz. After connecting to power, start the
self calibration process on the optimal oscilloscope signal path at
2. Check the accessories
greatest measurement accuracy. Press the [UTILITY] button and
A checklist of accessories that come with your DSO oscilloscope is
[F1], then press F] to go to the next page and press [F1]. To
provided in the section “ Accessories for DSO Series Digital
recall DEFAULT SETUP, see Figure 1-4.
Storage Oscilloscope” of this user manual. Please check any
After completing the above steps, press CH1] to enter the CH1 menu.
missing items against this list.
If any item is missing or damaged, please contact your Tenma dealer or
our local office.
3. Thorough inspection of the entire unit
If the exterior of the unit is damaged, or it is not operating normally, or it
fails to pass the performance test, please contact your Tenma dealer or
our local office.
In the event of any shipping damages, please retain the packaging and
notify our shipping department or your Tenma dealer. We will be glad to
arrange maintenance or repair.
45 440
[ 5
[
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2. Accessing signals
Your DSO oscilloscope has dual input channels and an external
trigger input channel. Please access signals in the following steps :
① Connect the probe of the digital storage oscilloscope to the
CH1 input terminal, and set the attenuation switch of the probe to
10X (Figure 1-5).
Power switch
Figure 1-4
Warning : To avoid danger, ensure the digital
storage oscilloscope is safely
grounded.
Figure 1-5 Setting the attenuation switch of the probe
Function
key
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② You have to set the probe attenuation factor of the oscilloscope. ③ Connect the probe tip and ground clamp to the connection terminal
This factor changes the vertical range multiple to ensure the for the probe compensation signal. Press [AUTO] and you will see a
measurement result correctly reflects the amplitude of the signal square wave in the display (1kHz, approximately 3V, peak-to-peak
being tested. Set the attenuation factor of the probe as follows : value) in a few seconds, as shown in Figure 1-7. Use the same method
Press [F] to show X on the menu.to check CH2. Press function key [CH1] again to close CH1. Press
function key [CH2] to activate CH2 and repeat steps 2 and 3.
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Figure 1-6 Setting the deflection factor
of the oscilloscope probe Figure 1-7 Probe compensation signal
Probe ration
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3. If you see an “Undercompensation” or “Overcompensation”
Probe Compensation
waveform display, adjust the adjustable capacitance tab of the
When connecting the probe to any input channel for the first time, probe with a screwdriver with non-metal handle, until a “Correct
perform this adjustment to match the probe to the channel. Skipping the Compensation” waveform shown in the above figure is displayed.
compensation calibration step will result in measurement error or fault.
Please adjust probe compensation as follows :
1. Set the probe attenuation factor to 10X. Move the switch on the
probe to 10X and connect the probe to CH1. When using a hook-
tip, ensure it is well connected to the probe. Connect the probe tip
Automatic Setup for Waveform Display
to the output terminal of the probe compensator's signal
connector, and the ground clamp to the ground cable connector of Your DSO oscilloscope features an auto setup function. It can
the probe compensator. Activate CH1 then press [AUTO]. automatically adjust the vertical deflection factor, scanning time
base and trigger mode based on the input signal, until the most
2. Observe the displayed waveform.
appropriate waveform is displayed. The auto setup function can only
be operated when the signal to be measured is 20Hz or above and
the duty ratio is larger than 1%.
Using the Auto Setup Function :
1. Connect the signal to be tested to the signal input channel.
2. Press [AUTO]. The oscilloscope will automatically set the vertical
deflection factor, scanning time base and trigger mode.
Overcompensation Correct Compensation Undercompensation
Figure 1-8 Probe compensation calibration
Warning : To avoid electric shock when measuring high
voltage with the probe, ensure the probe's
insulation lead is in good condition. Do not
touch the metal part of the probe when
connected to HV power.
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DSO Series User Manual