Rishabh Rish Insu 5Dx Manuale utente

Release 1.01 - 04/02/16

Rish Insu 5Dx

5KV Digital Insulation Tester

User Manual

Rish Insu 5Dx

Table of contents

1 PRECAUTIONS AND SAFETY MEASURES....................................................................................................2

1.1 Preliminary instructions ................................................................................................................................ 2

1.2 During use..................................................................................................................................................... 3

1.3 After use....................................................................................................................................................... 3

1.4 Definition of measurement (overvoltage) category........................................................................................ 3

2 GENERAL DESCRIPTION............................................................................................................................4

2.1 Instrument features ...................................................................................................................................... 4

3 PREPARATION FOR USE............................................................................................................................4

3.1 Initial inspections .......................................................................................................................................... 4

3.2 Power supply ................................................................................................................................................ 4

3.3 Calibration .................................................................................................................................................... 4

3.4 Storage ......................................................................................................................................................... 4

4 OPERATING INSTRUCTIONS .....................................................................................................................5

4.1 Instrument description.................................................................................................................................. 5

4.2 Description of function keys.......................................................................................................................... 5

4.3 Description of display.................................................................................................................................... 6

4.4 Description of measuring leads...................................................................................................................... 7

4.5 GUARD lead .................................................................................................................................................. 7

4.6 Notes on the insulation measurements ......................................................................................................... 7

4.7 Switch on the instrument .............................................................................................................................. 8

4.7.1 Configuration of the test parameters for FIX mode ............................................................................. 8

4.8 Insulation measurement in FIX mode ............................................................................................................ 9

4.8.1 Configuration of the test parameters for FIX mode ............................................................................12

4.9 Insulation measurement in ADJUST mode ....................................................................................................13

4.9.1 Configuration of the test parameters for ADJUST mode .....................................................................16

4.10 Insulation measurement in RAMP mode.......................................................................................................17

4.10.1 Configuration of the test parameters for RAMP#1 mode....................................................................21

4.10.2 Configuration of the test parameters for RAMP#2 mode....................................................................21

4.10.3 Configuration of the test parameters for RAMP#3 mode....................................................................22

4.11 Enable/Disable of SMOOTH function ............................................................................................................22

4.12 Anomalous situations...................................................................................................................................22

5 MANAGEMENT OF MEMORY DATA........................................................................................................25

5.1 Save measurements.....................................................................................................................................25

5.2 Delete measurements..................................................................................................................................25

5.3 Recall measurements...................................................................................................................................26

6 RESET OF INSTRUMENT .........................................................................................................................26

7 CONNECTION OF THE INSTRUMENT TO PC.............................................................................................26

8 MAINTENANCE ......................................................................................................................................27

8.1 General information.....................................................................................................................................27

8.2 Recharging internal battery..........................................................................................................................27

8.3 Cleaning the instrument...............................................................................................................................27

8.4 End of life.....................................................................................................................................................27

9 TECHNICAL SPECIFICATIONS ..................................................................................................................28

9.1 Reference guidelines....................................................................................................................................29

9.2 General characteristics.................................................................................................................................29

9.3 Environment ................................................................................................................................................30

9.4.1. Environmental conditions for use ......................................................................................................30

9.4 Accessories ..................................................................................................................................................30

9.4.1 Standard accessories .........................................................................................................................30

9.4.2 Optional accessories..........................................................................................................................30

10 SERVICE .................................................................................................................................................31

10.1 Service operation .........................................................................................................................................31

11 THEORETICAL APPENDIX........................................................................................................................32

11.1 Polarization Index (PI) ..................................................................................................................................32

11.2 Dielectric Absorbtion Ratio (DAR) .................................................................................................................32

Rish Insu 5Dx

1PRECAUTIONS AND SAFETY MEASURES

The instrument has been designed in compliance with standards IEC/EN61557 and IEC/EN61010-1

regarding electronic measuring instruments.

CAUTION

For the operator’s safety and to prevent damaging the instrument, follow the

procedures described in this manual and carefully read all notes preceded by the

symbol .

Before and during measurements, carefully observe the following instructions:

Do not perform any measurement in humid environments, in the presence of gas or explosive

or inflammable material or in dusty areas

Even when no measurements are being performed, avoid any contact with the circuit being

tested, with exposed metal parts, with unused measuring leads or circuits, etc

Do not perform any measurement when anomalies are found in the instrument, such as

deformations, breaks, substance leaks, no display view, etc

Pay special attention when measuring voltages above 25V in special environments (building

yards, swimming pools, etc.) and 50V in ordinary environments, as there is the danger of

electric shocks.

In this manual and on the instrument, the following symbols are used:

CAUTION: it is necessary to consult the instruction manual to find the type of potential

danger and the actions to be taken.

Observe the instructions reported in the manual. An improper use could damage the

instrument and lead to dangerous situations for the operator.

DC voltage or current.

AC voltage or current.

Dangerous voltages: risk of electric shocks.

Instrument with double insulation.

1.1 PRELIMINARY INSTRUCTIONS

This instrument has been designed for use in an environment with pollution level 2

It may also be used to test industrial electrical systems up to overvoltage category IV 600V to

earth with maximum voltage 600V between inputs

Follow the usual safety rules to protect the operator from dangerous currents and protect the

instrument against improper use

Never use the instrument resting on the floor, it must be placed over flat horizontal surfaces

Only the accessories supplied with the instrument guarantee safety standards. They must be in

good conditions and replaced, if necessary, with identical models

Do not measure systems exceeding the current and voltage limit values specified

Do not perform measurements in environmental conditions not within the limit values

indicated in this manual

Before connecting the probes to the circuit to be tested, check that the correct function is

selected.

Rish Insu 5Dx

1.2 DURING USE

Carefully read the following recommendations and instructions:

CAUTION

Failure to observe the cautions and/or instructions may damage the instrument

and/or its components or generate a danger for the operator. If, during use, the low

battery symbol appears on the display, insert the supply cable into the Mains socket

to start battery recharge. During battery recharge, it is possible to perform

measurements.

Before selecting a new function, disconnect the measuring probes from the circuit

When the instrument is connected to the circuit being tested, never touch any unused lead

Avoid measuring resistance with external voltages; even if the instrument is protected, as an

excess voltage may cause instrument malfunctions

Prevent that the instrument receives voltage during measurement (e.g. a probe slipping from

the measuring point and touching a point under voltage)

Avoid inserting the plug of the supply cable into the Mains socket while measuring.

1.3 AFTER USE

When measurements are completed, turn off the instrument by pressing the ON/OFF key.

1.4 DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY

Standard "IEC/EN61010-1: Safety requirements for electrical equipment for measurement, control

and laboratory use, Part 1: General requirements", defines what is intended for measurement

category, commonly known as overvoltage category. In § 6.7.4: Measuring circuits, it reads:

Circuits are divided into the following measurement categories:

Measurement category IV is for measurements performed at the source of a low-voltage

installation

Examples are electric counters and measurements on primary devices protecting against

overcurrents and on ripple adjusting units

Measurement category III is for measurements performed on installations inside buildings

Examples are measurements performed on distribution boards, circuit breakers, wiring

harnesses, including cables, bars, junction boxes, switches, sockets of fixed installations and

appliances designed for industrial use and other equipment, e.g. stationary motors connected

to fixed systems.

Measurement category II is for measurements performed on circuits directly connected to the

low-voltage installation.

Examples are measurements performed on household appliances, portable tools and similar

equipment.

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

the MAINS.

Examples are measurements performed on circuits not derived from the MAINS and on circuits

derived from the MAINS provided with a special (internal) protection. In this latter case, the

stress caused by the transients is variable; therefore, (OMISSIS) it is necessary that the user

knows the appliance’s resistance to transients.

Rish Insu 5Dx

2GENERAL DESCRIPTION

The instrument You purchased, if used in compliance with the indications given in this manual,

guarantees accurate and reliable measurements and the utmost safety thanks to a development

of new conception which ensures double insulation and, consequently, compliance with the

requirements of overvoltage category IV.

2.1 INSTRUMENT FEATURES

Insulation resistance measurement with nominal voltage which can be set up to 5kV

Dielectric leakage current measurement

Polarization Index (PI) measurement

Dielectric Absorption Ratio (DAR) measurement

Capacitance measurement.

AC/DC voltage measurement up to 600V

3PREPARATION FOR USE

3.1 INITIAL INSPECTIONS

Before shipment, the instrument’s electronics and mechanics have been inspected. All possible

precautions have been taken in order for the instrument to be delivered without damage.

However, we recommend generally inspecting the instrument in order to detect any damage

suffered during transport. Should you detect any anomalies, immediately contact the forwarding

agent or the dealer.

Moreover, we recommend checking that the package contains all parts listed in § 9.4. Should you

find any discrepancy, please contact the dealer. Should it become necessary to return the

instrument, please follow the instructions reported in § 10

3.2 POWER SUPPLY

The instrument is power-supplied through internal batteries which are recharged from the mains

by means of a battery charger integrated in the instrument itself. The symbol “ ” steadily

illuminated in the right bottom part indicates that the batteries are flat and must be recharged. To

recharge the batteries, follow the instructions given in § 8.2

CAUTION

Perform at least a complete recharging of internal battery in one year. If the

instrument is not used for one year, the battery can be damaged and could not be

completely recharging neither after some charging/discharging cycles.

3.3 CALIBRATION

The instrument complies with the technical specifications reported in this manual. Its correct

operation is guaranteed for one year from the date of purchase.

3.4 STORAGE

In order to guarantee accurate measurements and protect the instrument from possible failures,

after a long storage period under extreme environmental conditions, wait for the instrument to

return to a normal condition (see § 9.4.1).

Rish Insu 5Dx

4OPERATING INSTRUCTIONS

4.1 INSTRUMENT DESCRIPTION

CAPTION:

1. Input bushings

2. Mains socket

3. RS232 connector

4. ON/OFF/ key

5. Multifunction arrow keys

6. FUNC/ERASE MEM key

7. MODE/CLEAR SMOOTH key

8. SET/DISPLAY MEM key

9. ESC/RECALL MEM key

10. SAVE key

11. START/STOP key

12. LCD display

Fig. 1: Instrument description

4.2 DESCRIPTION OF FUNCTION KEYS

Key

Description

Multifunction arrow keys they have several functions which are

described in detail below

ON/OFF/ key used for:

Switch on/off the instrument

Switch on the display’s backlighting for 20 seconds (short

pressing of the key with the instrument already on)

FUNC/ERASE MEM key used for:

Select the desired function

Delete the measurements saved during the display of memory

data

MODE/CLEAR SMOOTH key used for:

Change the internal modes (if there are more available modes)

The pressure of the key set the default value of the selected

parameter

SET/DISPLAY MEM key used for:

Set the test parameters of a function

The pressure of the key shows the dates of the measurement

saved inside the memory

Rish Insu 5Dx

ESC/RECALL MEM key used for:

Access to the data saved in the memory (if present)

From a parameter setting screen or memory data display screen,

pressing the key once allows returning to the previous screen

SAVE key used for:

Once a measurement has been completed, pressing the key once

allows saving the results in the memory

From a parameter setting screen, pressing the key once allows

saving the changes made to the parameters

START/STOP key used for:

Start and/or stop a measurement

Table 1: Description of function keys

4.3 DESCRIPTION OF DISPLAY

Symbol

Description

Display group 1 shows:

Insulation resistance

Dielectric leakage current

PI (Polarization Index)

DAR (Dielectric Absorption Ratio)

Capacitance

Display group 2 shows:

Nominal test voltage

Generated test voltage

Display group 3 shows the duration time of the test

Bargraph

Modes available test : FIX, ADJUST and RAMP

, ,

“Flash”, Alarm (values over limits), “Warning” symbols

, ,

“Low battery", “Mains supply", “Timer” symbols

“Number of test cycles” symbol

Table 2: Description of symbols of display

Rish Insu 5Dx

4.4 DESCRIPTION OF MEASURING LEADS

CAPTION:

1. Hand protection

2. Safety areas

Fig. 2: Measuring leads

4.5 GUARD LEAD

In some cases, measurements could be affected by surface currents. By applying voltage to an

insulation to be measured, there may be two distinct currents: one flowing in the test piece, the

other flowing on its surface. In case you want to measure only the resistance due to current Im

flowing in the test piece Rx (which is the significant one), it is necessary to absorb the surface

current If using another lead.

Fig. 3: Currents flowing in the test piece

4.6 NOTES ON THE INSULATION MEASUREMENTS

Measuring a high resistance such as the insulation resistance is very difficult as the value of the

currents considered may be very low. When measuring, to prevent making mistakes, it is therefore

necessary to take the following precautions:

CAUTION

Keep the measuring leads suspended above the path or, anyway, make sure the

leads do not make contact in more of one point

While measuring high resistances, the area around the measuring instrument and

the appliance being tested must be free. It is recommended to use the timer

function so that the operator may keep at due distance from the leads and from

the resistance to be tested

It is recommended to use the GUARD lead to measure resistances of some tens of

Gor higher

While use the instrument with main supply, it's important to check that the

earthed resistance pole to measure is connected to the instrument Rx+

Terminal

Rish Insu 5Dx

4.7 SWITCH ON THE INSTRUMENT

After switch on, the instrument gives a short

acoustic signal and, for approximately one

second, all segments of the display appear.

Then, the instrument shows the firmware

version, then it sets to the last measuring mode

selected before turning off.

4.7.1 Configuration of the test parameters for FIX mode

If no test is being carried out, the instrument automatically turns off after approximately 5

minutes after the last time a key was pressed. To reactivate the instrument, it is necessary to turn

it on again by pressing the relevant key.

Rish Insu 5Dx

4.8 INSULATION MEASUREMENT IN FIX MODE

This measurement mode, performed in compliance with IEC/ EN61557-2 guideline, allows a quick

selection of the test voltage among the values: 250, 500, 1000, 2500, and 5000VDC.

CAUTION

The instrument may be used on installations of overvoltage category CAT IV 600V

to earth with maximum voltage 600V between inputs. Do not connect the

instrument to installations with voltages exceeding the limit values indicated in

this manual. If these limit values are exceeded, the operator may be exposed to

electrical shocks and the instrument could get damaged

Always connect the measuring leads to the instrument and to the alligator clips

with the accessories disconnected from the system

It is recommended to hold the alligator clip respecting the safety area marked by

the hand protection (see § 4.4)

Fig. 4: Instrument connection

Turn on the instrument by press ON/OFF/ key

Press the FUNC/ERASE MEM key to select the “FIX” mode

The display shows a screen similar to that

reported here to the side, which contains:

The FIX selected mode

The bargraph set to zero

The "--- TΩ" indication

The selected test voltage

The test time value

The plug symbol (if the instrument is

supplied from the mains)

The battery symbol steadily

illuminated or flashing (if batteries are

flat or are being recharged)

The TIMER symbol if the duration of

the test has been set

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