VOLTCRAFT AO-610 Manuale utente

Voltcraft AO-610

10MHZ OSCILLOSCOPE

USER’S MANUAL



CONTENTS



1.SAFETY PRECAUTIONS

2.SPECIFICATIONS

2.1 VERTICAL SYSTEM

2.2 TRIGGER SYSTEM

2.3 HORIZONTAL SYSTEM

2.4 X-Y MODE

2.5 CALIBRATION

2.6 CRT

2.7 POWER SOURCE

2.8 PHYSICAL FEATURES

2.9 WORKING ENVIRONMENT

2.10 PRESSURE-PROOF TEST

3. CONTROL AND INDICATORS

3.1 CONTROL PANEL POSITION

3.2 FUNCTIONS OF CONTROL SWITCHES

3.3 OPERATING INSTRUCTIONS

4. MEASUREMENT

4.1 EXAMINATION AND ADJUSTMENT BEFORE TAKING MEASUREMENTS

4.2 MEASUREMENT OF VOLTAGE

4.3 TIME MEASUREMENTS

4.4 PHASE DIFFERENCE MEASUREMENTS

4.5 X – Y MODE APPLICATIONS

5 . ACCESSORIES

1. SAFETY PRECAUTION

The A oscilloscope is easy to operate and highly reliable. It is an ideal instrument for research,

production, education, and development. It is a compact and portable oscilloscope with a

frequency bandwidth of 10MHz and sensitivity of 5mV/DIV-5V/DIV. Supplied as standard,

with a switchable X10: X1 probe which extends the sensitivity up to 50V/div. The horizontal

timebase is 0.1S/DIV to 0.1µS / D I V.

The instrument is designed and tested in accordance with EN publication 61010, CAT II,

Pollution degree II and Overvoltage 600V. The instrument has been tested in accordance to the

following EC Directives (EMC) :

a. EN50082

b. EN55011

c. EN610000-3-2

d. EN61000-3-3

The instrument complies with the requirements of the European Council Directive 89/336/EEC

(EMC Directive) and 73/23/EEC (Low Voltage Directive). To ensure that the instrument is

used safely, follow all safety and operating instructions in this manual. If the instrument is not

used as described in this manual, the safety features might be impaired.

WARNING

Non compliance with the warnings and/or the instructions for use may damage the

instrument and/or its components or injure the operator.

Take extreme care under the following conditions when using the instrument:

For your own safety and that of the instrument, you must follow the procedures described

in this instruction manual and especially read all the notes proceeded by the symbol

carefully.

Do not use this instrument in a location where there is explosive gas in the vicinity. The use

of this instrument in a location where there is explosive gas could result in explosion.

If there is any smoke, abnormal odor, or abnormal sound coming from this instrument,

immediately switch off the power and disconnect the power cord. Continuous using of this

instrument under these conditions could result in electrical shock or fire. After

disconnecting the power cord, contact the service offices for repair. Repair by the user is

dangerous and should be strictly avoided.

Take care not to allow water to get into this instrument. The use of this instrument in a wet

state could result in electrical shock or fire. If water or other foreign matter has penetrated

this instrument, first switch the power off, remove the power cord and call for repair.

Do not place this instrument on an unstable or slanting surface . The dropping or turning

over of this instrument could result in electrical shock, injury or fire. If this instrument has

been dropped or its cover has been damaged, switch the power off, remove the power cord

and call for repair.

Do not allow any foreign matter such as metal or inflammable substance to get into the

instrument via the air holes. The penetration of any foreign matter from the ventilation

holes could result in fire, electrical shock, or power failure.

Use this instrument with the rated AC power source. Use of this instrument with a voltage

other than specified could result in electrical shock, fire or power failure. The usable

power voltage range is marked on the rear panel.

Do not remove either the cover or panel.

Take sufficient care when measuring high voltages.

Do not modify this instrument.

Avoid use of damaged cables .

2. SPECIFICATIONS

2.1 VERTICAL SYSTEM

Sensitivity

5mV/DIV. ~5V/DIV ±3%

Trimming Ratio

2.5:1

Rise Time

35ns

Bandwidth(-3dB)

DC:0~10MHz AC:10Hz~10MHz

Input Impedance

1MΩ±3%,30 pF ±5pF

Max. Input Voltage

400V pk

2.2 TRIGGER SYSTEM

Trigger Sensitivity

Int 1 div., Ext 0.3V

Ext. Trigger Input Impedance

1MΩ30pF

Ext. Trigger Max. Input Voltage

400Vpk

Trigger Sources

Int, Line, Ext

Trigger Mode

Norm, AUTO, TV

2.3 HORIZONTAL SYSTEM

Sweep Time

0.1S / DIV ~0.1µS / DIV ±3%

Trimming Ratio

2.5:1

2.4 X-Y MODE

Sensitivity

0.2V/DIV

〜

0.5V/DIV

Bandwidth(-3dB)

DC: 0~1MHz AC: 10Hz~1MHz

2.5 CALIBRATION SIGNAL

Waveform

Symmetric Square Wave

Range

05.V ±2%

Frequency

1kHz ±2%

2.6 CRT

Display Area

8 ×10DIV 1DIV=6mm

Accelerating Voltage

1200V

Display Color

Green

2.7 POWER SOURCE

Voltage Range

110V±10% , 220V±10%

Frequency

50Hz ±2Hz

Power Consumption

25W

2.8 PHYSICAL FEATURES

Weight

3kg

Dimensions (H x W x D)

190 ×130 ×270mm

2.9 WORKING ENVIRONMENT

Working temperature

5°C ~ 40°C

Storage Environment

-30°C ~60°C, 10~80%RH

Working Altitude

≤2000m

2.10 PRESSURE-PROOF TEST

Pressure-proof test

1500V 1min

3. CONTROL AND INDICATORS

3.1 Control Panel Position

3.1.1 Front Panel Fig 3-1

3.1.2 Rear Panel Fig 3-2

3.2 FUNCTIONS OF CONTROL SWITCHES

NO.

SWITCHES

FUNCTIONS

POWER SWITCH

Power on/off

POWER LIGHT

Lights when power on

INTENSITY

Controls brightness of display

FOCUS

After obtaining appropriate brightness with INTENSITY,

adjust FOCUS for clearest line

CALIBRATION

Provide symmetric square wave for 0.5V range,

frequency=1KHz. Used for adjusting 10:1 Capacitor and

adjusting the vertical & horizontal sensitivity.

TIME/DIV

Selects the sweep rate

Horizontal

POSITION

Horizontal positioning control of trace on the screen

HORIZONTAL

VA R

Provides continuously variable sweep rate, turn clock wise

to the end is the calibrating position

LEVEL

Control signal trigger to sweep at certain level

+/-

+: Triggering occurs when trigger signal crosses trigger

level in a positive-going direction.

-: Triggering occurs when trigger signal crosses trigger

level in a negative-going direction

TV: used to show TV signals

AUTO/NORM

EXT/X: X-Y

AUTO : a single trace shown on screen even no signal.

Automatically reverts to triggered sweep

operation when adequate triggered signal is

present. Needs to adjust the Level.

NORM: No trace on screen if no signal. Trace is only

generated when adequate trigger signal is present

EXT/X: X-Y switch

INT/EXT/LINE

Switch to select the Trigger Source INT/EXT/LINE

Ext. Trig Input

Terminal

When switching [11] to EXT/X, it’s X-Y input terminal;

When switching [12] to EXT, it’s Ext. Trig. Input terminal.

ATT

Continuously adjusting X-Y mode sensitivity, turn

clockwise to obtain the highest sensitivity

VOLTS/DIV

Adjusting sensitivity of vertical system

Vertical POSITION

Control vertical position of trace on the screen

VERTICAL VAR

Continuously adjusting the sensitivity of vertical system,

turn clockwise to the end is the calibration position

coupling options

(AC⊥DC)

Selects input coupling options

INPUT

Vertical input terminal

POWER INPUT

CONNECTOR

AND FUSE

power input connector (refer to the rear panel for voltage)

110V±10% , 220 V ±10%;

3.3 OPERATING INSTRUCTIONS

3.3.1 VOLTAGE CHECKING

A oscilloscope is set for 110V±10% , 220V ±10% voltage. Before connecting the unit to the

mains supply, make sure that the correct voltage is being used. Incorrect mains voltage may

cause damage to the instrument.

3.3.2 BASIC OPERATION

(1) POSITION FOR CONTROL SWITCHES

CONTROL SWITCHES

POSITION

INTENSITY [3]

Center

FOCUS [4]

Center

POSITION [7] [16]

Center

VOLTS/DIV [15]

0.1V

VAR [8] [17]

Calibration position

AUTO/NORM [11]

Auto

TIME/DIV [6]

0.5mS

SLOPE +/- [10]

INT/EXT/LINE [12]

Int

AC⊥DC [18]

(2) OPERATION

a. Power on [1],

b. Power lights at [2],

c. Allow a warm-up period of 5 minutes, then adjust the intensity[3],

d. Adjust focus [4] for clearest line. If unstable, adjust level [9] .

(3) Horizontal Level Adjustment :

a. Slightly turn screws [21][23] counter clockwise, but do not remove;

b. Insert a straight end screw driver to [22], and whilst observing the waveform,

turn the screw driver in order to set the waveform parallel with the horizontal

line ;

c. Tighten screws [21] [23].

(4) Connect the calibration signal [5] to Y input terminal[19] with 1:1 probe

(5) Adjust positions [7] [16] to obtain waveform like Fig 3-3.

Fig 3-3

3.3.3 VERTICAL SYSTEM OPERATION

(1) VOLTS/DIV switch should be turned to the correct position following the input signal

range. Adjust position [16] to show the whole waveform within the available area.

Adjust with VAR [17] if necessarily, trimming ratio is 2.5:1.

(2) Input coupling options: “DC”is used for observing a signal with a direct current

content such as logic or static signals, “DC” must be used with low frequency. “AC”

is used for observing the AC component of signals. “⊥”(ground) is used to establish

a trace at a zero volt reference.

(3) X-Y OPERATION: When [11] set at EXT/X, The oscilloscope is used for X-Y

operation, at this moment Input [19] is Y-axis with the same sensitivity, Input [13] as

X-axis, [14] can be adjusted continuously within 0.2V/DIV~0.5V/DIV.

3.3.4 TRIGGER SOURCE

In Fig 3-1, [12] provides 3 sources for selection, INT trigger, EXT trigger input from

[13], LINE input from power source.

3.3.5 HORIZONTAL SYSTEM OPERATION

(1)Sweep setup : turn the sweep switch to the correct position according to the signal

frequency and adjust POSITION [7] to show the whole waveform within the available

area. Adjust with VAR [8] if necessarily, trimming ratio is 2.5:1.

(2)There are 3 kinds of Trigger sources: [11] “AUTO”auto sweep, when a triggering

signal is applied, Level [9] will adjust to correct position. The screen showing a steady

free run waveform requires a frequency higher than 20Hz; [11] “NORM”while

waiting for sweep with no trace. When an input signal occurs the scope is triggered to

sweep

(3)and show the waveform . [10] “TV” used to determine TV signals.

(4)SLOPE selection: Used to select whether the trigger signal crosses trigger level in a

positive or a negative-going direction.

(5)Level setup : Use to adjust signal sweep on a level at a starting reference.

3.3.6 SIGNAL CONNECT

(1) Probe operation :

Use 10:1 to 1:1 switchable probes. When using 10:1 probe, input impedance is 10MΩ

16 pF. While if 1:1 is used for observing a signal, input impedance is 1MΩ30 pF. At

this stage, please consider the affect of the probe in certain circuits.

(2) Probe Adjustment

Before using , 10:1 probe must be adjusted correctly, see Point 4.1.2

4 Measurement

4.1 EXAMINATION AND ADJUSTMENT BEFORE MEASUREMENT

In order to ensure accuracy and prevent errors, the following observations should be made

before taking a measurement.

4.1.1 TRACE ROTATION

The horizontal trace on the screen should be parallel with the horizontal line. Due to the

earth’s magnetic field and other factors which causes horizontal trace leaning you must

examine the following before taking measurements:

(1) Adjust the front panel control to obtain a horizontal trace on the screen .

(2) Adjust the vertical position control to ensure the horizontal line in is centered.

(3) If the horizontal line/trace is not level, then please following point 3.3.2(3) to correct

it .

4.1.2 PROBE COMPENSATION

Adjustment of the probe is required to compensate for the variations caused by difference

in oscilloscope input characteristics:

(1) Follow step 3.3.2, setup front panel controls, and obtain a sweep baseline.

(2) Set VOLTS/DIV to 10mV/DIV.

(3) Connect CH1 10:1 probe to input terminal, and connect to the “CAL” terminal.

(4) Follow Chapter 3 to operate relative controls, to obtain a waveform on the screen as

Indice

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