VOLTCRAFT 632 FG Bedienungsanleitung

1 

INDEX PAGE

1. PRODUCT INTRODUCTION................................................................................................................ 4

1-1 DESCRIPTION......................................................................................................................................... 4

1-2 FEATURES.............................................................................................................................................. 4

2. TECHNICAL SPECIFICATIONS......................................................................................................... 5

3. PRECAUTIONS BEFORE OPERATION............................................................................................. 7

3-1 UNPACKING THE INSTRUMENT............................................................................................................... 7

3-2 CHECKING THE LINE VOLTAGE ............................................................................................................. 7

3-3 ENVIRONMENT ...................................................................................................................................... 7

3-4 EQUIPMENT INSTALLATION AND OPERATION ........................................................................................ 7

3-5 CRT INTENSITY .................................................................................................................................... 7

3-6 WITHSTANDING VOLTAGES OF INPUT TERMINALS................................................................................ 7

4. PANEL INTRODUCTION......................................................................................................................8

4-1 FRONT PANEL........................................................................................................................................ 9

4-2 REAR PANEL........................................................................................................................................ 11

5. OPERATION METHOD....................................................................................................................... 12

5-1 BASIC OPERATION---SINGLE-CHANNEL OPERATION ........................................................................... 12

5-2 DUAL-CHANNEL OPERATION............................................................................................................... 13

5-3 ADD OPERATION................................................................................................................................ 13

5-4 TRIGGERING ........................................................................................................................................ 13

5-5 TIME/DIV CONTROL ......................................................................................................................... 15

5-6 SWEEP MAGNIFICATION ...................................................................................................................... 15

5-7 X-Y OPERATION ................................................................................................................................. 15

5-8 CALIBRATION OF PROBE...................................................................................................................... 16

5-9 DC BAL ADJUSTMENTS ..................................................................................................................... 16

5-10 FUNCTION GENERATOR..................................................................................................................... 16

6. MAINTENANCE.............................................................................................................................. 17

6-1 FUSE REPLACEMENT ........................................................................................................................... 17

6-2 LINE VOLTAGE CONVERSION .............................................................................................................. 17

6-3 CLEANING ........................................................................................................................................... 17

7. BLOCK DIAGRAM............................................................................................................................... 18

2 

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 Frame or chassis

High Voltage refer to Manual Conductor Terminal

Terminal

3 

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:

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 equipment and/or user instructions for details. As a

guide, cable of 0.75mm ²should 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.

4 

1. PRODUCT INTRODUCTION

1-1 Description

The VOLTCRAFT 632FG oscilloscope + Function Generator is a portable-type, dual-channel oscilloscope with

function generator. Its bandwidth of DC is up to 30MHz, and its maximum sensitivity is 1mV/DIV. The time base

provides a maximum sweep time of 0.2uS/DIV. The sweep speed becomes 100nS/DIV after magnifying 10 times.

The oscilloscope uses a 6-inch rectangular type cathode-ray tube with red internal graticule. The Function

Generator generates triangle wave, sine wave, and square wave with the frequency range from 0.1Hz to 1MHz.

The product is sturdy, easy to operate and exhibits high operational reliability.

1-2 Features

1) High intensity CRT with high acceleration voltage:

The CRT is a high beam transmission and high intensity type with a high acceleration voltage of 2kV. It displays

readable traces clearly even at high sweep speeds.

2) Wide bandwidth and sensitivity:

In addition to wide bandwidth, DC-30MHz (-3dB), the instrument provides high sensitivity of 5mV/DIV (1mV/DIV

at×5 MAG). A 30MHz frequency is obtained with improved triggering synchronization.

3) Alternate triggering:

Even with an observation of two different frequency waveforms, each waveform can be triggered stably.

4) TV sync triggering:

The oscilloscope has a sync separator circuit for TV-V and TV-H signals triggering.

5) CH1 Output:

A signal from 50Ωoutput terminal of CH1 located on rear panel can be applied to frequency counter or other

instruments.

6) Z-Axis Input:

Intensity modulation capability permits time or frequency markers to be added. Trace blank with positive signal,

TTL compatible.

7) X-Y operation:

Set the switch to X-Y to operate the instrument as an X-Y oscilloscope. CH1 can be applied as a horizontal

deflection (X-axis) while CH2 provides vertical deflection (Y-axis).

8) Built-in Function Generator with BNC output of 50Ω.

9) Three kinds of waveforms are available with 50Ωoutput.

10) Waveform frequency is up to 1MHz.

5 

2. TECHNICAL SPECIFICATIONS

MODEL

SPECIFICATIONS VOLTCRAFT 632FG

30MHz OSCILLOSCOPE + FUNCTION GENERATOR

1. OSCILLOSCOPE

Sensitivity 5mV ∼5V/DIV, 10 steps in 1-2-5 sequence.

Sensitivity Accuracy ≤3% ( × 5 MAG : ≤5%).

Vernier Vertical sensitivity To 1/2.5 or less of panel-indicated value.

DC∼30MHz ( × 5MAG: DC∼7MHz).

Frequency bandwidth AC coupling: Low limit frequency of 10Hz.

(With reference to 100kHz, 8DIV. Frequency response at -3dB).

Rise time Approx. 11.6nS (×5 MAG: Approx. 50nS).

Input impedance Approx. 1M ohm // Approx. 25pF.

Square Wave Characteristics Overshoot : ≤5% ( At 10mV/DIV range).

Other distortions and other ranges: 5% added to the above value.

DC Balance Shift Panel adjustable.

Linearity <±0.1DIV of amplitude change when waveform of 2 DIV at graticule center is moved

vertically.

Vertical modes

CH1 : CH1 single channel.

CH2 : CH2 single channel.

DUAL : CH1 and CH2 are displayed. ALT or CHOP selectable at any sweep rate.

ADD : CH1 + CH2 algebraic addition.

Chopping Repetition

Frequency Approx. 250kHz.

Input Coupling AC, GND, DC.

Maximum Input Voltage 300Vpeak (AC: frequency 1kHz or lower).

Set probe switch at 1: 1, the maximum effective readout is 40Vpp (14Vrms at Sine wave),

set probe switch at 10: 1, the maximum effective readout is 400Vpp(140Vrms at Sine wave).

Common Mode Rejection

Ratio 50:1 or better at 50kHz sinusoidal wave. (When sensitivities of CH1 and CH2 are set

equally).

Isolation between channels

(At 5mV/DIV range) >1000:1 at 50kHz.

>30:1 at 30MHz.

CH1 signal output At least 20 mV/div into a 50Ωterminal, Bandwidth is 50Hz to 5MHz at least.

VERTICAL

AXIS

CH2 INV BAL. Balanced point variation: ≤1 DIV (Reference at center graticule).

Triggering source

CH1, CH2, LINE, EXT (CH1 and CH2 can be selected only in the DUAL or ADD vertical

mode).

In ALT mode, if the TRIG. ALT switch is pushed in, it can alternate triggering of two

different source.

Coupling AC: 20Hz to full bandwidth.

Slope + / -.

Sensitivity 20Hz ∼2MHz : 0.5 DIV, TRIG-ALT:2 DIV, EXT : 200mV.

2 ∼30MHz : 1.5 DIV, TRIG-ALT:3 DIV, EXT : 800mV.

TV : Sync pulse more than 1 DIV (EXT: 1V).

Triggering modes AUTO : Sweeps run in the free mode when no triggering input signal is applied.

(Applicable for repetitive signals of frequency 25Hz or over.).

NORM : When no triggering signal is applied, the trace is in the ready state, but not

displayed.

TV-V : This setting is used when observing the entire vertical picture of television signal.

TV-H : This setting is used when observing the entire horizontal picture of television

signal.

(Both TV-V and TV-H synchronize only when the synchronizing signal is negative)

EXT Triggering Signal Input

Input Impedance Approx.: 1M ohm // approx. 25pF.

TRIGGERING

Max. Input Voltage 300V (DC+AC peak), AC: Frequency not higher than 1kHz.

6 

MODEL

SPECIFICATION VOLTCRAFT 632FG

30MHz OSCILLOSCOPE + FUNCTION GENERATOR

Sweep Time 0.2μSec ∼0.5 Sec/DIV, 20 steps in 1-2-5 sequence.

Sweep Time Accuracy ±3%.

Vernier Sweep Time

Control ≤1/2.5 of panel-indicated value.

Sweep Magnification 10 times (maximum sweep time 100nSec/DIV).

×10 MAG Sweep Time

Accuracy ±5%, (20nSec∼50nSec are uncalibrated).

Linearity ±3%, ×10 MAG:±5% (20ns and 50ns are uncalibrated).

HORIZIONAL

AXIS

Position shift caused by

×10 MAG Within 2 div. at CRT screen center.

Sensitivity Same as vertical axis (X-axis: CH1 input signal; Y-axis:CH2 input signal.).

Frequency Bandwidth DC to at least 500kHz.

X-Y Phase Difference ≤30 at DC ∼50kHz.

X-Y MODE

Sensitivity 5 Vpp (Positive-going signal decreases intensity).

Frequency Bandwidth DC ∼2MHz.

Input resistance Approx. 47kΩ.

Maximum Input Voltage 30V (DC+AC peak, AC frequency≤1kHz).

Waveform Positive-going Square wave.

Z AXIS

Frequency Approx. 1kHz.

Duty Ratio Within 48:52.

Output Voltage 2 Vpp ±2%.

CALIBRATION

VOLTAGE Output Impedance Approx. 1kΩ.

Type 6-inch rectangular type, internal graticule.

Phosphor P31.

Acceleration Voltage Approx. 2kV.

Effective Screen Size 8 × 10 DIV (1 DIV = 10mm (0.39in)).

Graticule Internal.

CRT

Trace Rotation Provided.

2. FUNCTION GENERATOR

Output Function Range 0.1Hz ~ 1MHz (7 steps).

Output Waveform Sine Wave, Square Wave Triangle Wave.

Frequency Variable Range 10:1 or more.

Output Impedance 50Ω±10%.

Output Voltage Over 20Vpp (open circuit) continuous conversion.

DC offset possible over ±6V when opened.

Sine wave Distortion & Jitter 1% Max.(10Hz ∼20kHz), (Specification applied from Max. to 1/10 level)

Square wave Unsymmetry ±3% or less (in 1kHz maximum).

Square wave Rise/Fall Time 50Ωoutput: 120nS or less.

3.GENERAL

Power Source AC115V, 230V ± 15% selectable, 50Hz or 60Hz.

Power Consumption Approx. 45VA, 40W(max.)

Operation Environment

Indoor use

Altitude up to 2000 m

Ambient temperature :

To satisfy specifications :10°to 35℃(50°to 95°F)

Maximum operating ranges: 0°to 40℃(32 °to 104°F)

Relative humidity: 85% RH(max.) non condensing

Installation Category II

Pollution degree 2

Storage Temperature & Humidity -10°to 70℃, 70%RH(maximum).

Accessories

Powercord ×1

Instruction manual ×1

Probes ×2

GTL-101 ×1

Dimensions 310 (W) × 150 (H) × 455 (D) mm.

Weight Approx.8kgs (17.6lbs).

7 

3. PRECAUTIONS BEFORE OPERATION

3-1 Unpacking the instrument

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 damage 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 product can be applied any kind of the 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.

The fuse must be changed following after the line voltage shown as below:

Line voltage Range Fuse

AC 115V 97~132V T 0.63A

250V

AC 230V 195~250V T 0.315A

250V

WARNING. To avoid personal injury, disconnect the power cord before removing the fuse holder.

3-3 Environment

The normal ambient temperature range of this instrument is from 0°C to 40°C (32°F to 104°F). To operate the

instrument over this specific temperature range may cause damage to the circuits.

Do not operate 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 vent of the instrument. If it is not according to the specification to operate

the instrument, the protection provided by the instrument may be impaired.

3-5 CRT Intensity

To prevent permanent damage to the CRT phosphor, do not let the CRT trace brighten excessively or leave the spot

stay for an unreasonable 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 voltage higher than the specification. When set probe switch at 1: 1, the maximum effective

readout is 40Vp-p (14Vrms at Sine wave), set probe switch at 10: 1, the maximum effective readout is 400Vp-p

(140Vrms at Sine wave).

Input terminal Maximum input voltage

CH1, CH2, inputs 300Vpeak

EXT TRIG IN input 300Vpeak

Probe inputs 600Vpeak

Z AXIS input 30Vpeak

CAUTION. To avoid an

dama

e, do not appl

exceedin

maximum input volta

e of the

frequency less than 1 kHz to the instrument.

If an AC voltage which is superimposed on a DC voltage is applied, the maximum peak value of CH1and CH2 input

voltages must not exceed ±300V, so is the AC voltages with a mean value of zero voltage, the maximum peak to

peak value is 600Vpp.

8 

4. PANEL INTRODUCTION

Fig. 4-1 Front Panel

 Fig. 4-2 Rear Panel

9 

4-1 Front Panel

CRT :

(6) POWER

Main power switch of the instrument. Turn on the switch to light the LED (5).

(2).INTEN

Control the brightness of the spot or trace.

(3) FOCUS

Focus the trace to the sharpest image.

(4) TRACE ROTATION

Semi-fix potentiometer for aligning the horizontal trace in parallel with graticule lines.

(33)FILTER

The filter is easy for waveform viewing.

Vertical Axis:

(8) CH1 (X) input

The vertical input terminal of CH1 is X-axis in X-Y operation,

(20)CH 2 (Y) input

The vertical input terminal of CH2 is Y-axis in X-Y operation,

(10) &(18)AC-GND-DC

Select connection mode between input signal and vertical amplifier.

AC ACcoupling

GND Vertical amplifier input is grounded and input terminals are disconnected.

DC DCcoupling

(7) & (22)VOLTS/DIV

Select the vertical axis sensitivity from 5mV/DIV to 5V/DIV with 10 ranges totally.

(9) & (21)VARIABLE

Fine adjustment of sensitivity with a factor of ≥1/2.5 of the indicated value. The sensitivity is calibrated to

specific value in the CAL position. When this knob is pulled out (x5 MAG state), it will multiply 5 by the

amplifier sensitivity.

(13) & (17)CH1 & CH2 DC BAL.

The knobs are used for adjusting the attenuator balance. See page 20 DC BAL adjustments for details.

(11)&(19)56POSITION

Vertical positioning control of trace or spot.

(14)VERT MODE :Select operation modes of CH 1 and CH 2 amplifiers.

CH 1 Operate the oscilloscope as a single-channel instrument by selecting CH1 alone.

CH 2 Operate the oscilloscope as a single-channel instrument by selecting CH2 alone.

DUAL Operate the oscilloscope as a dual-channel instrument by selecting CH1 and CH2.

ADD The oscilloscope displays the algebraic sum (CH1 + CH2) or subtraction (CH1 - CH2) of the two

signals (the subtraction function effects only when push in CH2 INV(16) button).

(12)ALT/CHOP

When this switch is released in the dual-trace mode, the CH1 and CH2 inputs are alternately displayed (normally

used at faster sweep speeds).

When this switch is depressed in the dual-trace mode, the CH1 and CH2 inputs are chopped and displayed

simultaneously. (normally used at slower sweep speeds).

(16)CH2 INV

When press CH2 INV button, it will inverts the CH2 input signal in CH2 and in ADD MODE, the CH2 trigger

signal pickoff is also inverted.

(23)SOURCE

Select the internal triggering source signal, and the EXT TRIG IN input signal.

CH 1 Press key DUAL or ADD of VERT MODE (14), select CH1 to get internal triggering source signal

CH 2 Press key DUAL or ADD of VERT MODE (14), select CH2 to get internal triggering source signal

(27)TRIG.ALT

Set VERT MODE switch (14) in DUAL or ADD key, select the SOURCE switch (23) by pressing CH1 or CH2,

then press TRIG.ALT switch(27), the internal triggering source signal will display alternately from CH1 and

CH2.

LINE Display the triggering signal from AC power line frequency signal.

EXT Obtain the external triggering source signal by applying external signal to EXT TRIG IN input

terminal (24).

(26)SLOPE

Triggering slope button.

“+” Triggering occurs when the trigger signal crosses the trigger level by positive-going course.

“- ” Triggering occurs when the trigger signal crosses the trigger level by negative-going course

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