Sonel MIC-2 Manuel utilisateur

OPERATING

MANUAL

INSULATION

RESISTANCE

METER

MIC-2

SONEL S. A.

ul. Wokulskiego 11

58-100 Świdnica

Version 1.8 21.02.2017

We appreciate your having purchased our insula-

tion resistance meter. The MIC-2 meter is a mod-

ern measuring device, which is easy and safe to

use. Please acquaint yourself with the present

manual in order to avoid measuring errors and

prevent possible problems related to operation of

the meter.

OPERATING MANUAL MIC-2 ver. 1.8

TABLE OF CONTENTS

1SAFETY ............................................... 4

2MEASUREMENTS............................. 5

2.1 INSULATION RESISTANCE

MEASUREMENT................................. 5

2.2 CONNECTION RESISTANCE

MEASUREMENT................................. 8

2.3 VOLTAGE MEASUREMENTS............... 9

3SOFTWARE VERSION AND

DESIGN DISPLAY ........................... 10

4POWER SUPPLY OF THE

METER .............................................. 10

4.1 MONITORING OF THE POWER SUPPLY

VOLTAGE ........................................ 10

4.2 REPLACEMENT OF BATTERIES

(ACCUMULATORS) .......................... 11

5CLEANING AND

MAINTENANCE .............................. 12

6STORAGE ......................................... 12

7DISMANTLING AND

UTILIZATION.................................. 12

8TECHNICAL DATA......................... 12

8.1 BASIC DATA.................................... 12

8.2 AUXILIARY DATA ........................... 14

9ACCESSORIES................................. 14

9.1 STANDARD ACCESSORIES................ 14

9.2 OPTIONAL ACCESSORIES................. 15

10 MANUFACTURER........................... 15

Attention:

The present operating manual applies solely to

the meters it has been attached to.

OPERATING MANUAL MIC-2 ver. 1.8

Voltage exceeding 600V connected to the meter

may result in its damage.

1 Safety

The MIC-2 meter has been designed to realise

measurements whose results determine the safety

conditions of the installation. Therefore, in order to

provide conditions for correct operation and the

correctness of the obtained results, the following

recommendations must be observed:

Before you proceed to operate the meter, ac-

quaint yourself thoroughly with the present

manual and observe the safety regulations and

specifications determined by the producer.

The MIC-2 meter has been designed for the

purpose of insulation resistance and connec-

tion resistance measurements, as well as di-

rect and alternative voltage measurement. Any

other application than those specified in the

present manual may result in a damage to the

device and constitute a source of danger for

the user.

The device must be operated solely by appro-

priately qualified personnel with relevant certif-

icates that entitle them to realise measure-

ments of electric installation. Operation of the

meter realised by unauthorised personnel may

result in damage to the device and constitute a

source of danger for the user.

The device must not be applied to the network

and equipment within premises of special con-

ditions, e.g. in a dangerous atmosphere with

regard to explosion or fire.

It is unacceptable to operate the following:

A damaged meter which is completely or

partially out of order,

A meter with damaged cable insulation,

A meter stored for an excessive period of

time in disadvantageous conditions (e.g.

excessive humidity). If the meter has been

transferred from a cool to a warm envi-

ronment of a high level of relative humidi-

ty, do not realise measurements until the

meter has been warmed up to the ambi-

ent temperature (approximately 30

minutes).

Before proceeding to a connection resistance

and insulation resistance measurement, make

sure the object under investigation has been

disconnected from the power supply voltage.

OPERATING MANUAL MIC-2 ver. 1.8

During an insulation resistance measurement,

it is unacceptable to disconnect the cables

from the object under investigation before the

measurement has concluded; otherwise the

capacity of the object will not be discharged,

what gives rise to a danger of electric shock.

Do not operate a meter with an open or incor-

rectly closed battery (accumulator) compart-

ment or power it from other sources than those

specified in the present manual.

The meter’s inputs are electronically protected

from power surge up to 660V for 30 seconds.

Repairs may be realised solely by an author-

ised service point.

The device complies with the following stand-

ards: PN-EN 61010-1 and PN-EN 61557.

2 Measurements

In order to effectively eliminate interferences,

before the initial measurements it is recommended

to set the frequency of the power network for the

given area (50Hz or 60Hz). In order to do so:

2.1 Insulation resistance meas-

urement

The device measures the insulation resistance

providing a test voltage U to the tested insulation

RXand measuring flowing current I at the side of

the RISO- probe, and measured at the RISO+ input.

Calculating the insulation resistance value, the me-

OPERATING MANUAL MIC-2 ver. 1.8

ter uses the technical insulation measurement

method (RX=U/I). The measurement voltage is se-

lected between the two following values: 250V or

500V.

The level of the output current of the converter

is 1 mA. Activation of the current limitation is sig-

nalled by means of a continuous sonic alarm. The

result of the measurement is then correct, but at

the measurement terminals there is a measure-

ment voltage which is lower than the one adjusted

before the measurement. The current limitation

may occur particularly often in the first stage of the

measurement due to the process of charging of the

capacity of the measured object.

Proper

measurements

Insulation

resistance Rx

Measurement voltage

500V

500k

Currentlimitationstatus

250V

250k

The actual measurement voltage as the

function of the measured insulation resistance

RX (for the maximum measurement voltage).

OPERATING MANUAL MIC-2 ver. 1.8

Remarks

- During the measurement cycle, the buzzer emits

a short single signal every five seconds, so it is

possible to record the chronological characteristics

of the resistance of the insulation under investiga-

tion.

- During measurements the AUTO-OFF is not ac-

tive.

- In the mode of voltage measurement the AUTO-

OFF countdown starts anew each time the voltage

is changed by more than 5V.

- Once a measurement has been concluded, the

last result is shown on the display along with the

symbol . The last result of the measurement

disappears if there is a voltage exceeding 20V at

the measurement terminals.

Additional information displayed by the

meter

and a

continuous

double

tone sonic

signal

The measured object is under a volt-

age exceeding 20V. The measure-

ment is blocked. During 5s a double

tone sonic signal is generated, and

then the meter displays the voltage of

the object. Disconnect the meter

from the object (both terminals)

immediately.

OPERATING MANUAL MIC-2 ver. 1.8

There may be an attempt to dis-

charge the object before the meas-

urement, it will be signalled by means

of the displayed symbol . An at-

tempt to discharge is undertaken if

the voltage exceeds 20V, but is lower

than 100V.

The insulation resistance is too low,

the measurement is finished. The

symbol is displayed if after 10 sec-

onds from the moment the START

button is pushed, the measurement

voltage has not reached the adjusted

value, and also if during the meas-

urement the insulation is punched

through.

The measurement range has been

exceeded.

A warning regarding a high voltage at

the terminals of the meter.

The object is discharged.

2.2 Connection resistance

measurement

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