GW Instek GOS-6000 User Manual

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

CONTENTS PAGE

1. PRODUCT INTRODUCTION.................................................

1-1.Description……………………………………………….

1-2.Feature…………………………………………………....

1 1 2

2. TECHNICAL SPECIFICATIONS………………………… 4

3. PRECAUTIONS BEFORE OPERATION…….…………... 3-1.Unpacking the Oscilloscope……………….………….… 3-2.Checking the Line Voltage…………………..………….. 3-3.Environment……………………………………..………

3-4.Equipment Installation and Operation………………....

3-5.CRT Intensity…………………………………………… 3-6.Withstanding Voltage of Input Terminals……………...

4. PANEL INTRODUCTION……………………..…………... 4-1.Front Panel………………………………………………. 4-2.Rear Panel……………………………………….……….

5. OPERATION METHOD………………………………...…. 5-1.Readout Display……………………………………..…... 5-2.Connecting Input Signals..……………………………… 5-3.Adjustment and Checks………………………………… 5-4.Function Check…..………………………………………

5-5.Basic Operation………….….…………………………....

5-6.Measurement Application……………………………….

6. MAINTENANCE…………………………………………… 6-1.Fuse Replacement……………………………………….. 6-2.Line Voltage Conversion……………………………..…. 6-3.Cleaning………………………………………………….

7 7 7 8 8 8 8

8 11 26

28 28 30 31 33 35 44

46 46 46 47

USER MANUAL

SAFETY TERMS AND SYMBOLS

These terms may appear in this manual or on the product:

WARNING. Warning statements identify condition 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.

The following symbols may appear in this manual or on the product:

DANGER ATTENTION Protective Earth(ground) High Voltage refer to Manual Conductor Terminal

Terminal

7. BLOCK DIAGRAM………………………………………... 48

⎯ ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

FOR UNITED KINGDOM ONLY

NOTE: This lead/appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED

IMPORTANT: The wires in this lead are coloured in accordance with

the following code:

Green/ Yellow: Earth

Blue: Neutral

Brown: Live (Phase)

As the colours of the wires in main leads may not correspond with the

colours marking identified in your plug/appliance, proceed as follows:

USER MANUAL

equipment and/or user instructions for details. As a guide, cable of

0.75mm

should be protected by a 3A or 5A fuse. Larger conductors

would normally require 13A types, depending on the connection

method used.

Any moulded mains connector that requires removal /replacement

must be destroyed by removal of any fuse & fuse carrier and disposed

of immediately, as a plug with bared wires is hazardous if a engaged

in live socket. Any re-wiring must be carried out in accordance with

the information detailed on this label.

The wire which is coloured Green & Yellow must be connected to the

Earth terminal marked with the letter E or by the earth symbol

or coloured Green or Green & Yellow.

The wire which is coloured Blue must be connected to the terminal

which is marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the terminal

marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment or

contact the supplier.

This cable/appliance should be protected by a suitably rated and

approved HBC mains fuse: refer to the rating information on the

iii

⎯ ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

Declaration of Conformity

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

GOOD WILL INSTRUMENT CO., LTD.

No.7-1, Jhongsing Road, Tucheng City, Taipei County 236, Taiwan

GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.

No.69 Lushan Road, Suzhou New District Jiangsu, China.

declares that the below mentioned product

GOS-6051/6050, GOS-6031/6030

are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility (89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Equipment Directive (73/23/EEC, 93/68/EEC). For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive, the following standards were applied:

◎ EMC

EN 61326-1: Electrical equipment for measurement, control and laboratory use –– EMC

requirements (1997+A1: 1998) Conducted and Radiated Emission EN 55011: 1998 Group I class A

Current Harmonic IEC 61000-3-2: 1995

Voltage Fluctuation IEC 61000-3-3: 1994

-------------------------

Electrostatic Discharge IEC 61000-4-2: 1995 Radiated Immunity IEC 61000-4-3: 1995

Electrical Fast Transients IEC 61000-4-4: 1995 Surge Immunity IEC 61000-4-5: 1995 Conducted Susceptibility IEC 61000-4-6: 1996

Power Frequency Magnetic Field IEC 61000-4-8: 1993 Voltage Dips/ Interrupts IEC 61000-4-11: 1994

◎ Safety

Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC

Safety Requirements

IEC/EN 61010-1: 2001

1.PRODUCT INTRODUCTION

1-1. Description

The GOS-6051/50/31/30 series are 50MHz/30MHz, two-channel, portable

oscilloscopes for general purpose use. A microprocessor-based operating system

controls most of the functions of the instrument, including cursor readout and

digitized panel setting. On-screen alphanumeric readout and cursor function for

voltage, time and frequency measurement provide extraordinary operational

convenience. It also has the function of auto measurement for frequency and

counter. Ten different user defined instrument settings can be saved and recalled

without restriction.

The vertical deflection system has two input channels. Each channel has 14 basic

deflection factors from 1mV to 20V per division. The horizontal deflection

system provides sweep time from 0.5s to 0.2μs per division. The trigger system

provides stable triggering over the full bandwidth of the vertical deflection

system.

⎯ 1 ⎯

⎯ ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

1-2.Features

Additionally, the oscilloscope offers several other features:

1) High intensity and internal graticule CRT

The oscilloscope employs a high intensity 6-inch retangular type cathode-

ray tube with red internal graticule. It displays clear readable traces even at

high sweep speeds. Internal graticule lines eliminate parallax-viewing error

between the trace and the graticule line.

2) Frequency Counter (GOS-6051/6031)

A built-in 6 digits frequency counter is accurate within the range of ±

0.01% measuring frequency between 1kHz to 30/50MHz and ±0.05%

measuring 50Hz to 1kHz.

3) ALT-MAG Function

The primary sweep waveform along with the magnified sweep waveform

can be displayed simultaneously using the ALT-MAG function. The

magnification ratio can be selected from among three stages of ×5, ×10, ×

20 for magnifying the displayed waveform in the center of the CRT.

4) Convenient VERT-MODE Triggering

The sync signal source is decided automatically when vertical axis mode is

switched. This means that you need not change the trigger source every

time you switch the VERT-MODE.

5) TV triggering

Exclusive TV sync separator circuit technology provides stable TV signal

measurements on fields, frames and lines.

6) Hold Off

The function allows the obtaining of stable synchronization for even

complex waveforms that are difficult to synchronized by adjusting the

trigger level alone.

USER MANUAL

7) CH1 Signal Output

The CH1 signal output is obtained by branching the input signal in the

middle of the signal line. As the connector outputs the input signal at a

rate of 50mV/div, connecting a frequency counter makes it possible to

measure the frequency of a very low signal while observing its waveform.

8) Z-axis intensity modulation

For applying a blanking signal from an external source. The trace displayed

on the screen may be intensity-modulated where pulse signal or time-scale

marks are required.

9) LED indicator and buzzer alarm

The LED’s located in the front panel assist operation and indicated

additional information. Incorrect operation and the electrical end position

of control knobs are indicated by a warning beep.

10) SMD manufacturing technology

The instrument is built by using the most advanced SMD technology so as

to reduce the number of internal wiring and shorten the foil route on the pc

board. This will also greatly increase the high frequency performance and

the reliability of the product.

11) Compact size (275W×130H×370D)mm and front panel layout groups for easy-

to-use.

⎯ 2 ⎯

⎯ 3 ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

2.TECHNICAL SPECIFICATIONS

6-inch rectangular type with internal graticule; 0%, 10%, 90% and 100% markers.

8 x 10 DIV (1 DIV = 1 cm)

2kV (GOS-6031/6030)

Polarity : positive going input decrease intensity Usable frequency range: DC to 2MHz. Max. input voltage: 30V (DC +AC peak) at 1kHz or less. Input Impedance: approx. 33kΩ(GOS-6051/6050)

calibrated steps in 1-2-5 sequence. Continuously variable to 1/2.5 or less of panel indicate value.

GOS-6051/6050 Bandwidth(-3dB) Rise Time

5mV~20V/DIV DC~50MHz Approx. 7ns

1mV~2mV/DIV DC~7MHz Approx. 50ns

GOS-6031/6030 Bandwidth(-3dB) Rise Time

5mV~20V/DIV DC~30MHz Approx. 11.7ns

1mV~2mV/DIV DC~7MHz Approx. 50ns

GOS-6051/6050: 6DIV at 50MHz, GOS-6031/6030: 8DIV at 20MHz, 6DIV at 30MHz

CRT

VERTICAL

SYSTEM

Type

Accelerating Potential Approx. 10kV (GOS-6051/6050),

INTEN and FOCUS Front panel control. Illumination Provided (GOS-6051/6031) Trace Rotation Provided. Z-axis Input Sensitivity: at least 5V

Sensitivity Accuracy 1mV~2mV/DIV ± 5%, 5mV~20V/DIV ± 3%, 14

Vernier Vertical Sensitivity

Bandwidth(-3dB) and Rise Time

Maximum Input Voltage 400V (DC + AC peak) at 1kHz or less. Input Coupling AC, DC, GND Input Impedance Approx. 1MΩ±2% // approx. 25pF Vertical Modes CH1, CH2, DUAL(CHOP/ALT), ADD, CH2 INV. CHOP Frequency Approx. 250kHz.

Dynamic Range

47kΩ(GOS-6031/6030)

HORIZONTAL

SYSTEM

TRIGGER SYSTEM

X-Y

OPERATION

OUTPUT SIGNAL

USER MANUAL

Sweep Time

Accuracy ±3%, ±5% at ×5 and ×10 MAG, ±8% at ×20 MAG Sweep Magnification ×5, ×10, ×20 MAG

Maximum Sweep Time (at MAG)

ALT-MAG Function Available. Trigger Modes AUTO, NORM, TV Trigger Source VERT-MODE, CH1, CH2, LINE, EXT. Trigger Coupling AC, HFR, LFR, TV-V(-), TV-H(-). Trigger Slope “+” or “- ” polarity.

Trigger Sensitivity

External Trigger Input

Hold-off Time Variable.

Input X-axis : CH1, Y-axis : CH2 Sensitivity 1mV/DIV~20V/DIV. Bandwidth X-axis: DC~500kHz (-3dB) Phase Difference

CH1 Signal Output

Calibrator output

0.2μs/DIV~0.5s/div, 20 steps selectable in 1-2-5 sequence, continuous variable control between steps at least 1:2.5.

GOS-6051/6050:20ns/DIV(10ns/DIV uncalibrated) GOS-6031/6030:50ns/DIV(10ns/DIV~40ns/DIV uncalibrated.

GOS-6051/

GOS-6050

20Hz~5MHz 0.5 DIV 2.0 DIV 200mV

5MHz~40MHz 1.5 DIV 3.0 DIV 800mV

40MHz~50MHz 2.0 DIV 3.5 DIV 1V

GOS-6031/

GOS-6030

20Hz~2MHz 0.5 DIV 2.0 DIV 200mV

2MHz~20MHz 1.5 DIV 3.0 DIV 800mV

20MHz~30MHz 2.0 DIV 3.5 DIV 1V

TV sync pulse more than 1 DIV (CH1, CH2, VERTMODE) or 200mV (EXT). Input impedance: Approx. 1MΩ//25pF(AC coupling) Max. input voltage: 400V (DC + AC peak) at 1kHz.

3°or less from DC to 50kHz Voltage : approx. 20mV/DIV (with 50Ω terminal.)

Bandwidth: 50Hz to at least 5MHz. Voltage : 0.5V±3%, Frequency: approx. 1kHz, square wave.

CH1,

CH2

CH1,

CH2

VERTMODE

EXT

⎯ 4 ⎯

⎯ 5 ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

Panel Setting Display Panel Setting Save &

Recall

Cursor Measurement (GOS-6051/6031)

CRT READOUT

Frequency Counter (GOS-6051/6031)

LINE POWER REQUIREMENT

SPEC.

OPERATING ENVIRONMENT

STORAGE TEMPERATUR E & HUMIDITY

ACCESSORIES

Measurement category I is for measurements performed on circuits not directly connected

to MAINS. Measurement category II is for measurements performed on circuits directly connected to the low voltage installation.

Measurement category III is for measurements performed in the building installation. Measurement category IV is for measurements performed at the source of the low-voltage

installation.

Voltage AC100V, 120V, 230V ±10% selectable. Frequency 50Hz or 60Hz. Power Consumption Approx. 60VA, 50W(max). Dimensions 275(W)×130(H)×370(D) mm.MECHANICAL Weights 8 kg Indoor use

Altitude up to 2000 m Ambient temperature : To satisfy specifications : 10℃ to 35℃ ( 50° F to 95°F ) Maximum operating ranges: 0℃ to 40℃( 32°F to 104°F ) Relative humidity: 85% RH(max.) non condensing Installation Category : II Pollution degree 2

-10° to 70℃, 70%RH(maximum)

Power cord….............……….. 1

Instruction manual…………… 1

Probe (×1/×10)…………..….... 2

CH1/CH2 sensitivity, sweep time, trigger condition

10 sets.(GOS-6051/6031)

Cursor Measurement Function: ΔV, ΔT, 1/ΔT. Cursor Resolution: 1/25 DIV. Effective Cursor Range: Vertical:±3 DIV,

Horizontal: ±4 DIV

Display Digits: Max. 6-digits decimal. Frequency Range: 50Hz~50MHz (GOS-6051)

50Hz~30MHz (GOS-6031)

Accuracy: ±0.05%: 50Hz~1kHz.

±0.01%: 1kHz~30/50MHz.

Measuring Sensitivity: The satisfied value of the above-mentioned Trigger Sensitivity plus 1 DIV. (measuring source selected from CH1 or CH2 as

synchronous signal source).

USER MANUAL

3.PRECAUTIONS BEFORE OPERATION

3-1.Unpacking the Oscilloscope

The product has been fully inspected and tested before shipping from the

factory. Upon receiving the instrument, please unpack and inspect it to check

if there is any damages caused during transportation. If any sign of damage is

found, notify the bearer and/or the dealer immediately.

3-2.Checking the Line Voltage

The oscilloscope can be applied any kind of line voltage shown in the table

below. Before connecting the power plug to an AC line outlet, make sure the

voltage selector of the rear panel is set to the correct position corresponding to

the line voltage. It might be damaged the instrument if connected to the wrong

AC line voltage.

WARNING. To avoid electrical shock the power cord protective

grounding conductor must be connected to ground.

When line voltages are changed, replace the required fuses shown as below:

Line voltage Range Fuse Line voltage Range Fuse

100V 120V

90-110V

108-132V

T 1A250V 230V 207-250V T 0.4A250V

WARNING. To avoid personal injury, disconnect the power cord

before removing the fuse holder.

⎯ 6 ⎯

⎯ 7 ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

3-3.Environment

The normal ambient temperature range of this instrument is from 0° to 40°C

(32° to 104°F). To operate the instrument over this specific temperature range

may cause damage to the circuits.

Do not use the instrument in a place where strong magnetic or electric field

exists as it may disturb the measurement.

3-4.Equipment Installation, and Operation

Ensure there is proper ventilation for the vents in the oscilloscope case. If the

equipment is used not according to the specification, the protection provided

by the equipment may be impaired.

3-5.CRT Intensity

To prevent permanent damage to the CRT phosphor, do not make the CRT

trace brighten excessively or leave the spot stay for an unreasonably long time.

3-6.Withstanding Voltages of Input Terminals

The withstanding voltages of the instrument input terminals and probe Input

terminals are shown in the following table. Do not apply voltages higher than

these limits.

Input terminal Maximum input voltage

CH1, CH2, inputs 400V (DC + AC peak)

EXT TRIG input 400V (DC + AC peak)

Probe inputs 600V (DC + AC peak)

Z AXIS input 30V (DC + AC peak)

USER MANUAL

4. PANEL INTRODUCTION

After the instrument is switched on, all the important settings are displayed in

the readout. The LED’s located on the front panel assist operation and indicate

additional information. Incorrect operation and the electrical end positions of

control knobs are indicated by a warning beep.

All of the pushbuttons, VOLTS/DIV control knobs, TIME/DIV control knobs

are electronically selected, and their functions and settings can therefore be

stored.

The front panel is subdivided into four sections:

z Display controls z Vertical controls z Horizontal controls z Trigger controls

CAUTION. To avoid damaging the instrument, do not apply

input voltages of the frequency over 1 kHz to the instrument.

⎯ 8 ⎯

⎯ 9 ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

Front panel of GOS-6031/6051

USER MANUAL

4-1.Front Panel

Display controls

The display controls adjust the on-screen appearance of the waveform and

provide a probe compensation signal source.

Front panel of GOS-6030/6050

⎯ 10 ⎯

(1) POWER – Pushbutton

When switch on the oscilloscope to have all LEDs lighted and wait a few

seconds, the normal operation mode is present. Then the last settings

become activated and the LED indicates “ON” condition.

(2) TRACE ROTATION

The TRACE ROTATION is for aligning the horizontal trace in parallel with

graticule lines. This potentiometer can be adjusted with a small screwdriver.

⎯ 11 ⎯

GOS-6051/6050/6031/6030 OSCILLOSCOPE

USER MANUAL

(3) INTEN—Control knob

The control knob is used for adjusting the traces intensity. Turning the knob

clockwise to increase the intensity while turning it counterclockwise to

decrease the intensity.

(4) FOCUS

The control knob effects both the trace and the readout sharply.

(5) CAL

The terminal provides a reference signal of 0.5Vp-p at 1kHz for probe

adjustment.

(6) Ground Socket—Banana Socket galvanically connected to safety earth

This socket can be used a reference potential connection for DC and low

frequency signal measurement purpose.

(7) TEXT/ILLUM—Control knob with a double function.

The pushbutton is for selecting the text readout intensity function or scale

illumination function, and indicates the letter “TEXT” or “ILLUM” in the

readout. Press the pushbutton for the following sequences:

“TEXT” — “ILLUM” — “TEXT”

The TEXT/ILLUM function are associated the VARIABLE(9) control knob.

Turning the knob clockwise to increase the text intensity or scale

illumination, while turning the knob counterclockwise to decrease it.

Pressing the knob to switch the TEXT/ILLUM on or off.

(8) CURSORS MEASUREMENT FUNCTION (GOS-6051/6031)

There are two pushbutton and associated the VARIABLE(9) control knob.

△V—△T—1/△T—OFF Pushbutton

When the pushbutton is pressed, the three measurement functions will be

selected in the sequence as follows:

USER MANUAL

△V: Two horizontal cursors appear. The voltage between the two cursors

is calculated according to the setting of VOLTS/DIV, and displayed

with △V on the upper side of the CRT.

△T: Two vertical cursors appear. The time between the two cursors is

calculated according to the setting of TIME/DIV, and displayed with

△T on the upper side of the CRT.

1/△T: Two vertical cursors appear. The reciprocal of the time (frequency)

between the two cursors is calculated with 1/△T on the upper side of

the CRT.

C1—C2—TRK Pushbutton

The cursor 1, cursor 2 and tracking can be selected by this button. Pressing the

pushbutton to select the cursors in sequence as follows:

C1: Moves the cursor 1 on the CRT(▼ or

symbol is displayed)

C2: Moves the cursor 2 on the CRT(▼ or symbol is displayed)

TRK: Simultaneously moves the cursor 1 and cursor 2 with the interval

between the two cursors unchanged (both symbol are displayed at the

two cursors.)

(9) VARIABLE—

Set the cursor position, TEXT/ILLUM, etc. by turning or pressing the

VARIABLE knob.

In the cursor mode, pressing the VARIABLE control knob to select the cursor

position between FINE and COARSE adjustment. When select FINE

adjustment by turning the VARIABLE, the cursor lines will move slowly. If

select COARSE adjustment, he cursor will move fast.

In TEXT/ILLUM mode, this control knob can be used to set the text intensity

or illumination. Please refer to TXT/ILLUM(7) for details.

⎯ 12 ⎯

⎯ 13 ⎯

+ 18 hidden pages