Elmed Isotest hv User manual

Operation manual ISOTEST HV Page 1

CONTENT

1. Introduction.............................................................................................2

2. Explanation of safety symbols being used in this manual................3

3. Operation.................................................................................................4

3.1 General Instructions............................................................................4

3.2 Safety..................................................................................................4

3.3 Operating Elements ............................................................................7

3.4 Measuring ...........................................................................................8

3.4.1 Preparation for the Measurement.................................................8

3.4.2 Measurement Configuration.........................................................9

3.5 Extended display...............................................................................10

4. Maintenance..........................................................................................11

4.1 Maintenance......................................................................................11

4.2 Inspection / Calibration .....................................................................11

4.3 Storage..............................................................................................11

4.4 Repairs..............................................................................................12

4.4 Technical Data ....................................................................................13

V. 2.0 - 07/2015

Page 2 Operation manual ISOTEST HV

1. Introduction

Direct measurement of impulse voltages of more than 1000 V is a special

case in electrical metrology:

Voltage measurement using an oscilloscope requires not only special

probes but also qualified and experienced operators.

A proper measuring procedure using a sphere gap in accordance with

VDE 0433 / Part 2 is very time-consuming. Apart from having to take

into consideration the ambient conditions (atmospheric pressure, temp-

erature), the evaluation of the measurement using the "50% method"

also poses certain problems.

The ISOTEST HV impulse voltmeter was designed especially for the

measuring of impulse voltages, e.g. for measuring unipolar short-time

impulses emitted by an ELMED ISOTESTdevice.

The measuring device allows simple and reliable testing of the high

voltages from ELMED ISOTESTdevices (and others).

Quality assurance standards prescribe this check as a compulsory part of

the quality assurance tests.

The ISOTEST HV impulse voltmeter is a precision measuring instrument

for use not only in laboratories but also on construction sites. The value of

the high voltage being measured can be read off directly in kV from the

illuminated graphic LCD with a resolution of 100 volt.

Using the supplied accessories, ELMED ISOTESTdevices can be easily

connected to the HV impulse voltmeter for performing voltage

measurements.

Adapters for other instruments are available on request.

Operation manual ISOTEST HV Page 3

2. Explanation of safety symbols being used in

this manual

The following symbols are used in this operating manual:

Safety symbols indicate the presence of adjacent safety notes.

Special symbols indicate important information that should strictly

be observed.

This symbol indicates that the relevant action imposes a hazard for life and

limb.

Danger

This symbol indicates information provided for improving the understanding

of processes.

NOTE

Page 4 Operation manual ISOTEST HV

3. Operation

3.1 General Instructions

Immediately after unpacking, inspect the voltmeter and the

accessories for damage and/or missing parts.

If damage is discovered, notify the supplier immediately.

Under no circumstances is the voltmeter to be put into

operation in a damaged condition.

Before using the voltmeter for measuring, the 4 included

AA cells must be inserted into the battery compartment on the

back. Ensure the correct polarity!

3.2 Safety

The high-voltage impulse voltmeter ISOTEST HV has been exclusively de-

signed for manual measuring of impulse voltages and may only be used for

this purpose.

-The equipment is not designed for continuous stationary operation!

-Other use than described above is inappropriate use!

Please note that:

operating the equipment in explosion-hazard environments is

strictly forbidden.

Proper use extends to reading these operating instructions as well as

meeting all relevant requirements, especially safety regulations.

Furthermore, all inspection and maintenance should be performed within

the specified time intervals.

If ISOTEST HV is not used as described above, safe operation cannot be

guaranteed.

Operation manual ISOTEST HV Page 5

The manufacturer does not assume any liability for injuries of persons or

damage to equipment if the test equipment is not properly used.

Liability lies with the operator of the equipment.

The high voltage impulse voltmeter ISOTEST HV is exclusively

to be used for the measuring of the output voltage of devices

that

work with impulse voltage on condition that the rms-value of

the output voltage in the event of short circuit does not

exceed 3 mA.

comply with the technical data (see chapter 4.4)

For measuring high voltages the rules and standards VDE 0104

(rules for testing stations and laboratories over 1 kV) and

VDE 0105 have to be adhered to.

When measuring it is of utmost importance to pay special atten-

tion to proper grounding of the impulse voltmeter and the

ISOTEST holiday detector, i.e.

With the grounding (included in the delivery) a low-

impedance connection has to be established between one of

the black jacks of the impulse voltmeter and a grounding

point provided by the customer (protective earth conductor).

The ISOTEST®holiday detector has to be grounded by the

grounding cable (also included in the delivery).

For this purpose the ISOTEST holiday detector has to be

connected to the second black grounding jack of the impulse

voltmeter by the cable with the black 6 mm connectors.

Page 6 Operation manual ISOTEST HV

EC Declaration of Conformity

It is herewith confirmed that the product listed below

ISOTEST HV (impulse voltmeter)

meets the safety requirements within the scope of the conformity evaluation

procedure of the related competent authority, which are defined in the regula-

tion 2004/108/EG of the European Council for the approximation of laws of the

member states with respect to electromagnetic compatibility. The same ap-

plies to the provisions of the law on electromagnetic compatibility of instru-

ments (EMVG) as of 9 November 1992.

This declaration applies to all units that are manufactured in accordance with

the appropriate manufacturing documentation which is part of this declaration.

For the evaluation of products regarding the electromagnetic compatibility

relevant harmonized standards have been used.

DIN EN 61326-1:2006

Design-engineering modifications that have such significant effects on

the technical specifications and the proper use defined in this operation

manual so as to change the instrument considerably shall nullify this

declaration of conformity.

This declaration shall be legally binding for the manufacturer

ELMED Dr.-Ing. Mense GmbH, Heiligenhaus

signed by

Claudia Mense

Managing Director

Heiligenhaus, 23 July 2010

Operation manual ISOTEST HV Page 7

3.3 Operating Elements

Fig. 1: ISOTEST HV with the operating elements

Page 8 Operation manual ISOTEST HV

ON / OFF switch

Position "O" : Voltmeter OFF

Position "I" : Voltmeter ON, display in operation

Illuminated graphic LCD

display of the measured value in kV (resolution 100 V)

battery level indicator

repetition rate

6 mm jacks for grounding cable

Earthing and connection to the ISOTEST®holiday detector

(in accordance with VDE, compulsory for measure-

ments of more than 1000 V !)

Connection for highvoltage measuring

contact area / connection of the high voltage side of the test

object (when possible use appropriate test adapters...)

Battery case

4 Mignon-cells (AA / LR6)

3.4 Measuring

3.4.1 Preparation for the Measurement

The ISOTEST HV impulse voltmeter may only be

used for measuring the output voltage of testing

devices that correspond to the requirements

specified under 3.2.

Particular attention must be paid to the correct

earthing of the voltmeter and the ISOTEST®

holiday detector (see 3.2 and 3.4.2)!

Operation manual ISOTEST HV Page 9

3.4.2 Measurement Configuration

Before connecting the ELMED ISOTESTholiday detector and the high-

voltage impulse voltmeter, ensure that the ELMED ISOTESTholiday de-

tector is switched off!

Fig. 2: Measurement configuration

Figure 2 shows the correct measurement configuration using an

ELMED ISOTESTdevice. The device should be set up as follows:

1. Earth the impulse voltmeter by connecting the earthing cable (E) to one

of the 6mm jack on the front.

Make a low-impedance connection to an earthing point on site

(PE/earthing conductor) using the clamping jaw of the supplied earthing

cable.

2. Earth the ISOTEST®device by connecting the earthing jack of the

ISOTEST®device to the 6 mm jack of the impulse voltmeter.

3. Insert the adapter (A) as far as possible into the electrode clamping

device of the test handle and tighten the plastic nut.

4. For ISOTEST®devices with adjustable test voltage, set the voltage to

be measured.

5. Apply the adapter on the measuring surface of the impulse

voltmeter.

6. Turn on the main switch of the impulse voltmeter and the ISOTEST®

holiday detector.

Info:

The battery charge condition is permanently displayed

(battery level indicator)

7. Press the safety button on the test handle of the ISOTEST®holiday

detector.

Page 10 Operation manual ISOTEST HV

While mesuring the safety button of the ISOTEST

®

holiday

detector must be pressed down during the whole process.

Should there be no measurement within 5 minutes after

switching on the device or after the last measurement the energy

saving mode is automatically activated.

In the energy saving mode the display is not illuminated and

blinks intermittently indicating „Please turn off power“.

Even in the energy saving mode the batteries are slowly dis-

charged.

Therefore the device has to be switched off on the main switch

after measuring in order to avoid a discharging of the batteries.

3.5 Extended display

Further to the display of the impulse voltage value the corre-

sponding DC voltage value is displayed in the bottom line of the

display.

ISOTEST®devices work with "equivalent impulse voltages"*.

As to the sparking distance these voltages are equivalent to DC

voltage values.

* The impulse voltage values have been determined in exten-

sive test series under application-related conditions and ac-

cording to scientific criteria.

Operation manual ISOTEST HV Page 11

4. Maintenance

4.1 Maintenance

Apart from occasional replacement of the battery, the impulse voltmeter

ISOTEST HV requires no maintenance.

Do not throw the ISTEST test equipment or expose it to heavy impact.

If the impulse voltmeter becomes soiled, particularly on the orange-red in-

sulator, it must be cleaned before any measurement is carried out. Clean

the test equipment and the accessories, using a soft, dampened or dry

cloth. Use only mild detergents.

4.2 Inspection / Calibration

To maintain the high reliability and the high quality standard of ISOTEST®

test equipment as long as possible, the equipment should be inspected and

calibrated by the manufacturer each year.

Observing the recommended inspection intervals contributes to continuous

functional safety of the equipment and avoids expensive repair. During in-

spections, all equipment functions are checked and the unit is calibrated.

The results of an inspection are stored in a database and documented in

manufacturer certificate traceable to the PTB (Physikalisch-Technische

Bundesanstalt, The German Bureau of Standards). A clearly visible label

indicates the due date of the next inspection.

4.3 Storage

If the test equipment is not used over more than 4 weeks, the following

measures should be taken:

1. Remove the batteries from the test equipment.

2. Clean the impulse voltmeter and the accessories.

3. Protect the equipment and the accessories from damage by storing it in

a dry room.

4. To avoid condensation at temperatures below the dew point, ensure

that the equiment is stored at normal ambient temperature.

Storage temperature: -20°C - +50°C (heating time constant > 10K/h)

Page 12 Operation manual ISOTEST HV

4.4 Repairs

Damaged components or components that do not work according to their

specifications must be replaced immediately. To ensure the unit’s safety

and functionality, only original spare parts may be used for repair.

ELMED test equipment, accumulators and batteries must be

disposed of according to legal requirements.

If your ISOTEST test equipment requires inspection or repair, please send

the unit with all transportation fees prepaid to:

ELMED Dr. Ing. Mense GmbH

Service

Weilenburgstr. 39

D- 42579 Heiligenhaus

Proper maintenance work and repairs in accordance with the

regulations can only be ensured if such work is carried out by the

manufacturer or by qualified and authorised service centres.

Operation manual ISOTEST HV Page 13

4.4 Technical Data

Functions: impulse voltage measuring

battery level indicator

repetition rate

Power source: 4 Mignon-cells (AA/LR6)

Power consumption:approx. 50 mA

Display: illuminated graphic LCD (128 x 64)

Measuring precision:

Function Measuring range Relative error + absolute error in

digits

Impulse voltage*

(average value) 10 - 35,0 kV ± 10 % ±5

Impulse voltage*

(average value) 5 - 9,9 kV ± 20 % ±5

* Condition of the impulses

Predominantly unipolar impulses, post-pulse oscillation up to 5 ms is permissible.

For further details, please see the table below:

Parameter Minimum Maximum

Duration 1 µs



100 µs

Repetition rate 10 Hz



100 Hz

Rise rate



5 kV/µs

Decay time ca. 50 ns

Load capacity < 20 pF

Ambient temperature: 0°C - 40°C

Storage temperature: -20°C - +50°C

(heating time constant > 10K/h)

Weight: 1,65 kg (without accessories)

Dimensions: 200 x 120 x 200 mm (W x H x D)

Accessories: Test adapter: 6 mm plug connector on MS tube

13 x 1.5 mm

Ground cable: 1m cable, both ends with 6 mm plug

connectors

10 m cable with 6 mm plug connector

and clamping jaw

Page 14 Operation manual ISOTEST HV

Notes:

___________________________________________________________

Operation manual ISOTEST HV Page 15

Notes:

___________________________________________________________

Page 16 Operation manual ISOTEST HV

Notes:

___________________________________________________________

ELMED ISOTEST HV User manual

Popular Measuring Instrument manuals by other brands