Elditest CT4024 Manuel utilisateur

CT4024

User Manual

CT4024

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Elditest is a trademark of Sefram Instruments and

Systems.

Elditest products are covered by US and foreign

patents, issued and pending. Information is this

publication supersedes all earlier versions.

Specifications subject to change without notice.

For product information, sales, service, and

technical support:

Compliance Statements

Disposal of Old

Electrical& Electronic

Equipment

(Applicable in the European Union

and other European countries with

separate collection systems). This

product is subject to Directive

2012/19/EU of the European

Parliament and the Council of the European Union

on waste electrical and electronic equipment

(WEEE), and in jurisdictions adopting that Directive,

is marked as being put on the market after August

13, 2005, and should not be disposed of as

unsorted municipal waste. Please utilize your local

WEEE collection facilities in the disposition of this

product and otherwise observe all applicable

requirements.

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Safety Summary

WARNING CAUTION

To avoid personal injury and/or product

damage, review and comply with the

following safety precautions. These

precautions apply to both operating and

maintenance personnel and must be

followed during all phases of operation,

service, and repair of this instrument.

Only qualified personnel should use this

probe. This high voltage probe is designed

to be used by personnel who are trained,

experienced, or otherwise qualified to

recognize hazardous situations and who

are trained in the safety precautions

necessary to avoid possible injury when

using such a device.

This instrument is intended for usage

within Measurement Category I (CAT I)

only.

Do not work alone when working with high

voltages.

Do not apply to the input any potential

that exceeds the maximum rating of the

probe.

For your own safety, inspect the probes

for cracks and frayed or broken leads

before each use. If defects are noted, DO

NOT USE the probe.

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Hands, shoes, floor and work bench

must be dry.

Avoid making measurements under

humidity, dampness or other

environmental conditions that might affect

safety.

Turn the high voltage source off before

connecting or disconnecting the probe

whenever possible.

The probe body should be kept clean

and free of any conductive contamination.

Do not remove the probe casing.

Removal of the probe’s casing may expose

you to electric shock.

Keep fingers behind the probe’s finger

guard during use.

Always properly ground the probe with

the lead before contacting high voltage

circuits with the probe tip. Always

disconnect the probe tip from high voltage

circuits before disconnecting the ground

lead. Do not connect the probe ground lead

to any point which is at a potential other

than earth ground.

Use only on test instruments where the

chassis or return lead is properly

grounded.

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Use only in office-type indoor setting

The instrument is designed to be used in

office-type indoor environments. Do not

operate the instrument:

•In the presence of noxious,

corrosive, or flammable fumes,

gases, vapors, chemicals, or finely-

divided particulates.

•In environments where there is a

danger of any liquid being spilled

on the instrument.

•In air temperatures exceeding the

specified operating temperatures.

•In atmospheric pressures outside

the specified altitude limits or

where the surrounding gas is not

air.

Use in an indoor Pollution Degree 2

environment. Measurements made by this

instrument may be outside specifications if

the instrument is used in non-office-type

environments. Such environments may

include rapid temperature or humidity

changes, sunlight, vibration and/or

mechanical shocks, acoustic noise,

electrical noise, strong electric fields, or

strong magnetic fields.

Not for critical applications. This

instrument is not authorized for use in

contact with the human body or for use as

a component in a life-support device or

system.

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Hazardous voltages may be present in

unexpected locations in circuitry being

tested when a fault condition in the circuit

exists.

Do not substitute parts that are not

approved by Cal Test Electronics or modify

this instrument. Return the instrument to

Cal Test Electronics for service and repair

to ensure that safety and performance

features are maintained.

AWARNING statement calls attention to

an operating procedure, practice, or

condition, which, if not followed correctly,

could result in injury or death to personnel.

A CAUTION statement calls attention to

an operating procedure, practice, or

condition, which, if not followed correctly,

could result in damage to or destruction of

parts or the entire product.

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Table of Contents

1General Information 6

1.1 Product Overview 6

1.2 Features 6

2Using the Probe 7

3Frequency Compensation 8

4Specifications 10

5Voltage Derating Curve 11

6Cleaning 11

7Service & Warranty Information 12

7.1 Limited One-Year Warranty 12

7.2 Calibration and Repair 13

1 General Information

1.1 Product Overview

The Elditest CT4024 is an 8 kV High

Voltage divider probe for use with both

digital and analog oscilloscopes.

1.2 Features

•Measuresup to: 8 kV (DC + ACpk)or

6 kVrms AC

•40 MHz bandwidth

•Voltage dividing of 1000:1

•Frequency compensation

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2 Using the Probe

1. Connect the probe to the BNC

input of the oscilloscope.

2. Select the desired volts/division

range on your oscilloscope.

3. If possible, always turn the high

voltage source off before

connecting or disconnecting the

probe.

4. Connect the divider probe

ground lead (alligator clip) to a

good earth ground or reliable

chassis ground.

5. Before turning on the high

voltage source, be certain the

operator is not touching any

part of the device under test.

6. Turn on the high voltage

source.

7. You will now be able to analyze

the voltage waveform on your

oscilloscope.

8. Turn off the high voltage

source.

9. Disconnect the probe from the

high voltage source BEFORE

disconnecting the ground clip

lead.

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3 Frequency Compensation

Proper compensation of the probe is

required to assure amplitude accuracy of

the waveform being measured by matching

the probe to the oscilloscope’s input

capacitance. Compensation should be

adjusted whenever the probe is connected

to, or transferred between, oscilloscopes.

The procedure is the same as for a x10

passive probe.

•Connect the probe to the

oscilloscope.

•Connect probe tip to square-wave

generator.

•Adjust the square wave generator for

10 V amplitude.

•Adjust the oscilloscope for a time

base of 500 µs/div.

•Turn trimmer (Figure 1) to adjust the

compensation on the probe making a

flat pulse top.

Figure 1: Trimmer on BNC

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Figure 2 shows how over- and under-

compensated pulse responses will look.

Figure 3 shows a perfectly compensated

probe.

Figure 3: Good Compensation

Figure 2: Over/Under Compensation

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Table des matières

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