METREL Eurocheck CS 2099 User manual

Eurocheck
CS 2099
User manual
Version 1.2, Code no. 20 750 127

2
Distributor:
Producer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: metr[email protected]
© 2005 METREL
Markon your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safetyand electromagnetic compatibility regulations.
No part ofthis publication maybe reproduced or utilized in anyform or byanymeans
without permission in writing from METREL.

CS 2099 Eurocheck Table of contents
3
1Introduction to CS 2099 – Eurocheck........................................................4
2Safetyand operational considerations......................................................5
2.1 Warnings.......................................................................................................5
2.2 Standards applied..........................................................................................5
3Eurocheck description and maintenance..................................................6
3.1 Front panel....................................................................................................6
3.2 Side panel......................................................................................................7
3.3 Replacing fuse...............................................................................................8
3.4 Cleaning........................................................................................................8
3.5 Periodic calibration........................................................................................8
3.6 Service...........................................................................................................8
4Eurocheck operation...................................................................................9
4.1 Recommended calibration sequence and practice........................................9
4.2 Sample test report form...............................................................................10
4.3 Selecting calibration function/sub-function...................................................11
4.4 Selecting appropriate test cable for calibration............................................11
4.5 Fault loop impedance calibration.................................................................12
4.6 Trip-lock impedance calibration...................................................................14
4.7 Line impedance calibration..........................................................................15
4.8 RCD trip-out time calibration........................................................................16
4.9 RCD measuring current I n=30 mA verification..........................................17
4.10 Insulation resistance calibration...................................................................17
4.11 LowΩand continuityresistance calibration..................................................18
4.12 Voltage and frequencycalibration................................................................20
4.13 Continuityand insulation of measurement leads verification.......................21
4.14 PE test terminal operation verification.........................................................22
5Technical specifications...........................................................................23
5.1 General........................................................................................................23
5.2 Calibration references..................................................................................23

CS 2099 Eurocheck Introduction to CS 2099 – Eurocheck
4
1Introduction to CS 2099 –Eurocheck
CS 2099 – Eurocheck is a professional, multifunctional field calibrator intended for use
with Metrel installation test instruments. In addition to its durable bodyand simple
operation it boasts the following features:
q Insulation calibration with test voltages up to 1000 V,
q LowΩand continuityfunction calibration,
q Continuityand insulation of measurement leads verification,
q Fault loop and trip-lock impedance calibration (all test currents supported on
Metrel instruments),
q Calibration ofRCD trip-out time measurement, including test current verification
(30 mA test current is supported),
q Line impedance calibration,
q Voltage and frequencycalibration,
q PE test terminal functional verification.
Functioning and accuracyofall Metrel and most other manufacturer’s installation test
instruments can be verified with Eurocheck. However, not all instruments support all
functions available on Eurocheck. Refer to your instrument User manual for a complete
list ofits measuring functions. The instrument list includes (but is not limited to):
q MI3100 – EurotestEASI,
q MI3101 – EurotestAT,
q MI3102 – EurotestXE,
q MI2086 – Eurotest,
q MI2087 – Instaltest,
q MI2087AL2 – Easitest,
q Smartec familyofinstruments.
Installation test instruments are usuallyused on a dailybasis in harsh environment
conditions. Often the user doesn’t have confidence in instrument operation and its
accuracy. Continuityof measurement leads presentsadditional problem. Manytimes it
is not possible to conclude the instrument state from ordinarymeasurement results.
Such results maylook correct, but in fact theyare wrong due to the instrument
malfunctioning. Regular test instrument calibration with Eurocheck will reveal such
problems.
Eurocheck doesn’t provide a complete calibration solution for installation test
instruments. Regular 6-months or 1-year calibration of all measurement functions ofthe
instrument is still recommended. What it does provide is simple field calibration of the
most frequentlyused functions when testing installations. Furthermore, in some
countries it is obligatory for approved contractors to demonstrate trustworthycontrol
system for ensuring accuracyoftest instruments (like NICEIC in United Kingdom).
Eurocheck represents one simple solution in such cases.
Notes:
q If in doubt about instrument operation and/or its accuracy, send it to your
distributor or manufacturer for a complete calibration and service, if required. The
same is valid ifyou’re in doubt about Eurocheck operation.
q Installation measurements in general and typical applications are explained in
Metrel handbook Measurements on electric installationsin theory and practice.

CS 2099 Eurocheck Safety and operational considerations
5
2Safetyand operational considerations
2.1 Warnings
Read and understand all warnings and cautions before using this product. This will
ensure your safety, as well as keep the test equipment undamaged.
q symbol on the instrument means »Read the Instruction manual with
special care«. The symbol requires an action!
q If the test equipment isused in a manner not specified in this user manual the
protection provided bythe equipment maybe impaired!
q Read this user manual carefully, otherwise use ofthe instrument maybe
dangerousfor the operator, for the instrument or for the equipment under test!
q Do not use the test equipment and accessories ifanydamage is noticed!
q In case a fuse hasblown followthe instructions in this manual to replace it!
q Consider all generallyknown precautions in order to avoid risk ofelectric shock
while dealing with hazardous voltages!
q Do not use the test equipment in supplysystems with voltages higher than 240
V!
q Do not disassemble, risk ofelectric shock – service intervention or adjustment
procedure is allowed to be carried out onlybya competent authorized person!
q Use onlystandard or optional test accessories supplied byyour distributor!
q Do not short-circuit anyofthe calibrator inputs/outputs!
Immediatelydisconnect from the powerline and discontinue use if:
q the calibrator is dropped or subjected to an impact in which the interior is
exposed,
q the calibrator emits a strange smell, excessive heat, or smoke.
Function specific warnings (applies to all operations performed with Eurocheck):
q In some countries the type ofmains plug determinesL and N wiring positions.
If Eurocheck signals incorrect polaritythis represents an installation fault, which
should be corrected immediately.
q When performing fault loop/trip-lock/line impedance calibration Eurocheck
always connects loop calibration output to mains line impedance (L and N), thus
avoiding tripping an RCD on mains supply. When evaluating absolute
measurement results line impedance of the mains has to be considered, not fault
loop impedance. Recommended calibration procedure, described in this
document, relies on the absolute result and the difference between two
measured values.
2.2 Standards applied
The CS 2099 - Eurocheck calibrator is manufactured and tested in accordance with the
following regulations:
q Safetyregulations......................................................EN 61010-1
q Electromagnetic compatibilityregulations.................EN 61326

CS 2099 Eurocheck Eurocheck description and maintenance
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3Eurocheck description and maintenance
3.1 Front panel
50 M
5
1
5
L
N
RCD
L
O
O
P
+
1
L
O
O
P
+
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1
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T
5
0
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9
9
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0.5
2 M
COM
Figure 3.1: Front panel
Legend:
1...........Insulation calibration outputs.
2...........LowΩand continuitycalibration outputs.
Caution – do not use test currents higher than 200 mA.
3...........Power supplycord connection polarityindication.
LED lights ifL and N lines are incorrectlyconnected – reverse connection.
4...........Incorrect test current indication for RCD trip-out time function verification
(appropriate LED lights iftest current is too lowor too high).
5...........RCD test calibration function selected.
6...........Fault loop calibration function selected (each LED indicates sub-function), also
used for trip-lock/line impedance calibration.
7...........LED lights if voltage is present at RCD/Fault loop calibration output.
Press RCD/LOOP selection button (9) once after connecting the calibrator to
the power supplyto enable voltage at output connector.
LED goes out whenever RCD simulator trips and is automaticallyrestored 3
seconds afterwards (other LEDs remain lit during this period).
8...........RCD/Fault loop calibration output (used for fault loop/trip-lock/line impedance
and RCD trip-out time calibration).
Caution – line voltage present on test terminals!
Consider specified dutycycle when calibrating fault loop or line impedance
to avoid overheating of Eurocheck.
9...........RCD/Fault loop selection button.
Press repeatedlyto cycle through available options: enable output, LOOP+11
Ω, LOOP+1 Ω, RCD, disable output.
10.........Voltage/frequencycalibration output.
10 9
5
1
2 3 4 6 7 8
Note:
Output connector
type is country
dependent.

CS 2099 Eurocheck Eurocheck description and maintenance
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3.2 Side panel
Figure 3.2: Side panel
Legend:
1...........Power supplycord.
2...........Fuse F1.
Note:
Eurocheck powers on automatically2 seconds after it is connected to the mains supply.
It checksfor correct mains supplyplug orientation during power up. If the orientation is
wrong “incorrect polarity” LED lights. In such case reverse connection ofpower supply
cord.
1 2
Note:
Output connector
type is country
dependent.

CS 2099 Eurocheck Eurocheck description and maintenance
8
3.3 Replacing fuse
A fuse is located underside cover ofthe Eurocheck unit:
q F1
T4 A / 230 V, 32 mm ×6.3 mm
General input protection fuse.
Warnings:
q Disconnect anyconnected instrument/accessoryand power offthe calibrator
before opening fuse compartment cover, hazardous voltage inside!
q Replace blown fuse with original type only, otherwise the calibrator maybe
damaged and/or operator’s safetyimpaired!
Position ofthe fuse can be seen in Figure 3.2 in chapter 3.2.
3.4 Cleaning
No special maintenance is required for the housing. To clean the surface ofthe
instrument use a soft cloth slightlymoistened with soapywater or alcohol. Then leave
the instrument to drytotallybefore use.
Warnings:
q Do not use liquids based on petrol or hydrocarbons!
q Do not spill cleaning liquid over the instrument!
3.5 Periodic calibration
It is essential that the unit is regularlycalibrated in order technical specification listed in
this manual is guaranteed. We recommend an annual calibration. An authorised
technical person should do the calibration. Please contact your dealer or manufacturer
for further information.
3.6 Service
For repairs under warranty, or at anyother time, please contact your distributor.
Unauthorised person is not allowed to open the Eurocheckcalibrator. There are no user
replaceable components inside the instrument, except one fuse, refer to chapter 3.3.

CS 2099 Eurocheck Eurocheck operation
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4Eurocheck operation
4.1 Recommendedcalibration sequence and practice
This chapter lists recommended sequence for calibration ofinstallation test instruments.
It is not obligatoryto followthis sequence. Eurocheck offers additional calibration
functions (all functions are explained in detail in the following chapters).
Calibration using universal test cable
Step Calibrated function Purpose
1LowΩDetermination ofmeasurement accuracy.
Verification ofuniversal test cable wire continuity
(incomplete).
2ContinuityDetermination ofmeasurement accuracy.
3Insulation Determination ofmeasurement accuracy.
Verification ofuniversal test cable wiring insulation
resistance (incomplete).
4Voltage Determination ofmeasurement accuracy.
Verification ofuniversal test cable or tip commander
wiring continuityand insulation state (complete in most
cases, refer to chapter 4.13).
Calibration using plug cable
Step Calibrated function Purpose
5Fault loop
impedance
and/or
Trip-lock impedance
Determination ofmeasurement accuracy.
Verification ofplug cable wiring continuity(incomplete).
6RCD trip-out time Determination ofmeasurement accuracy.
For further information on howto perform each measurement with your instrument see
its User manual.
Notes:
q It is advisable to perform at least 3 consecutive measurements to verifystability
ofmeasurement results. Consider accuracyofcalibrated function when
evaluating calibration results. Accuracyofeach function is defined in User
manual ofyour instrument.
q If calibration resultsdeviate significantlyfrom reference values, it is verylikelythe
tested instrument is damaged. Send it to yourdistributor or manufacturer for
repair and/or readjustment.
q It is a good practice to file results after each calibration. Variation of results over
time period mayindicate malfunctioning ofthe instrument.
q It is best to perform calibrations in similar environment conditions, since changes
oftemperature and relative humidityinfluence test instrument operation and
Eurocheck reference values. In anycase note environmental conditions of
calibration when storing measurement results.

CS 2099 Eurocheck Eurocheck operation
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4.2 Sample test report form
Caution:
q This sample test report form is suitable for Metrel installation test instruments like
MI3100 – EurotestEASI. It could be easilymodified to suit other types of
instruments.
q It is not based on anyregulation or recommendation.
Type of calibrated instrument
SN of calibrated instrument
Date of calibration
Temperature (°C)
Relative humidity(%RH)
Function Eurocheck value Measured value
0.5 ΩΩ
5 ΩΩ
LowΩ(±200 mA)
15 ΩΩ
0.5 ΩΩ
5 ΩΩ
Continuity(7 mA)
15 ΩΩ
2 MΩMΩInsulation 100 V 50 MΩMΩ
2 MΩMΩInsulation 250 V 50 MΩMΩ
2 MΩMΩInsulation 500 V 50 MΩMΩ
2 MΩMΩInsulation 1000 V 50 MΩMΩ
U
L-N, 50 V V
UL-PE, 50 V V
UN-PE, 50 V V
Voltage, frequency
50 HzHz
LOOP+1 ΩΩFault loop impedance LOOP+11 ΩΩ
LOOP+1 ΩΩTrip-lock impedance I n=30
mA LOOP+11 ΩΩ
50 ms ms
CURRENTLO PASS / FAIL
RCD trip-out time I n=30 mA
CURENTHI PASS / FAIL
Reference equipmentSN Calibration certificate no. Date of calibration
Metrel Eurocheck
Operator’s name andsignature

CS 2099 Eurocheck Eurocheck operation
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4.3 Selecting calibration function/sub-function
The following measurements can be selected with the RCD/LOOP function selection
button (see Figure 3.1). Appropriate LED lights when particular function/sub-function is
selected:
q Fault loop and trip-lock impedance calibration (two impedance values available),
q RCD trip-out time calibration and instrument test current verification.
The following measurements are not indicated with LEDs on front panel. Connect the
tested instrument to the outputs particular to each function:
q Insulation resistance,
q LowΩand continuityresistance,
q Voltage and frequencycalibration,
q Line impedance calibration,
q Continuityand insulation of measurement leads verification,
q PE test terminal operation verification.
Note:
q For descriptions of instrument measurement functions refer to its User manual.
4.4 Selecting appropriate test cablefor calibration
Functionsthat use Eurocheck RCD/Fault loop calibration output can be calibrated using
universal test cable, plug cable or plug commander. Use test tipsto connect universal
test cable into Eurocheck RCD/Fault loop calibration output:
q Fault loop impedance,
q Trip-lock impedance,
q RCD trip-out time and instrument test current I n,
q Line impedance,
q PE test terminal operation verification.
Measurement results should be the same, regardless of selected cable.
It is possible that the cause for incorrect calibration result is broken wire or deteriorated
insulation in measurement cable. Correctness ofuniversal test cable wiring can be
easilyverified, see chapter 4.13. Ifthis cable passes verification, use it to perform
calibration offunctions listed above. Write down measurement results. Then use other
type ofcable and repeat calibration. Compare measurement results, theyshould be
close to each other.
Other functions can be calibrated with universal test cable and tip commander:
q Insulation resistance,
q LowΩand continuityresistance,
q Voltage and frequency,
q Continuityand insulation of measurement leads verification.
For further information on howto use each cable type see User manual of your
instrument.

CS 2099 Eurocheck Eurocheck operation
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4.5 Fault loop impedance calibration
Fault loop impedance is measured between L and PE conductors. Fault loop calibration
will not trip an RCD if it’s present in installation where Eurocheck is connected,
regardless ofselected I n current.
Caution:
q When performing fault loop impedance calibration Eurocheck connects fault
loop calibration output to mains line impedance (L and N, important when
evaluating calibration measurement results).
q When evaluating absolute measured values first perform line impedance
measurement of the wall socket to which Eurocheck is then connected. Consider
that the impedance ofEurocheck mains cable is added to this value.
Fault loop impedance calibration can be performed with universal test cable, plug cable
or even plug commander.
Step Action
1 q Connect the tested instrument into EurocheckRCD/Fault loop output
using one ofavailable cables (plug cable, plug commander, universal
test cable); followconnection diagrams shown in Figure 4.1 and Figure
4.2.
2 q Switch on the tested instrument and select fault loop impedance
function.
3 q Connect Eurocheck into mains wall socket and enable itsoutput.
q Observe anywarnings displayed on the tested instrument and
Eurocheck.
q If Eurocheck signals incorrect L and N polarity, reverse connection.
4 q Select LOOP+11 Ωfunction on Eurocheckusing RCD/LOOP button,
LOOP+11 ΩLED lights.
q Observe anywarnings displayed on the tested instrument and
Eurocheck. If anyis present, remove the causes before proceeding.
5 q Perform fault loop impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
11 Ω– 12 Ωrange in most cases).
6 q Select LOOP+1 Ωfunction on Eurocheck, LOOP+1 ΩLED lights.
q Observe anywarnings displayed on the tested instrument and
Eurocheck. If anyis present, remove the causes before proceeding.
7 q Perform fault loop impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
1 Ω– 2 Ωrange in most cases).
8 q Calculate the difference between LOOP+11 Ωand LOOP+1 Ω
measurement results – it has to be close to 9.8 Ω(see Eurocheck
technical specification).
q If impedance difference deviates significantly from 9.8 Ω, it is verylikely
the tested instrument is damaged. Send it to your distributor or
manufacturer for repairand/or readjustment.
9 q Repeat steps 4 – 8 with reverse polarityoftest current in fault loop
impedance function (ifthe tested instrument enablesreverse polarity
selection).

CS 2099 Eurocheck Eurocheck operation
13
Note:
q In some instruments the function is named “Fault loop resistance”; however the
calibration procedure is the same.
Figure 4.1: Performing fault loop impedance calibration using plug cable
Figure 4.2: Performing fault loop impedance calibration using universal test cable
PE
L
N

CS 2099 Eurocheck Eurocheck operation
14
4.6 Trip-lock impedance calibration
Fault loop impedance is measured between L and PE conductors. Trip-lock calibration
will not trip an RCD if it’s present in installation where Eurocheck is connected,
regardless ofselected I n current.
Caution:
q When performing fault loop impedance calibration Eurocheck connects fault
loop calibration output to mains line impedance (L and N, important when
evaluating calibration measurement results).
q When evaluating absolute measured values first perform line impedance
measurement of the wall socket to which Eurocheck is then connected. Consider
that the impedance ofEurocheck mains cable is added to this value.
Trip-lock impedance calibration can be performed with universal test cable, plug cable
or even plug commander. Calibration can be performed with all I n currents supported
bythe tested instrument (even I n=10 mA).
Calibration procedure is basicallythe same as the procedure for fault loop impedance
function (chapter 4.5). Onlydifferencesbetween both procedures are noted below.
Step Action
1 q The same as fault loop impedance function.
q Followconnection diagrams shown in Figure 4.1 and Figure 4.2.
2 q Switch on the tested instrument and enter trip-lock impedance function.
q Select appropriate I n current. All I n currents are supported.
3 q The same as fault loop impedance function.
4 q The same as fault loop impedance function.
5 q Perform trip-lock impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
11 Ω– 12 Ωrange in most cases).
6 q The same as fault loop impedance function.
7 q Perform trip-lock impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
1 Ω– 2 Ωrange in most cases).
8 q Calculate the difference between LOOP+11 Ωand LOOP+1 Ω
measurement results – it has to be close to 9.8 Ω(see Eurocheck
technical specification).
q If impedance difference deviates significantly from 9.8 Ω, it is verylikely
the tested instrument is damaged. Send it to your distributor or
manufacturer for repairand/or readjustment.
9 q Repeat steps 4 – 8 with reverse polarityoftest current in trip-lock
impedance function (ifthe tested instrument enablesreverse polarity
selection).
Notes:
q In some instruments the function is named “Rs resistance”, “Rl resistance”
“loop(rcd) or “loop(rcd10mA). The calibration procedure is the same, regardless
ofthe name.

CS 2099 Eurocheck Eurocheck operation
15
q Selected I n current will affect dissipation of measurement results. Lower I n
currents (especially10 mA) will cause larger variations in results. Consider
accuracyoftrip-lock function when evaluatingcalibration results (accuracyis
defined in User manual ofyour instrument).
4.7 Line impedancecalibration
Line impedance is measured between L and N conductors.
Line impedance calibration can be performed with universal test cable, plug cable or
even plug commander.
Calibration procedure is basicallythe same as the procedure for fault loop impedance
function (chapter 4.5). Onlydifferencesbetween both procedures are noted below.
Step Action
1 q The same as fault loop impedance function.
q Followconnection diagrams shown in Figure 4.1 and Figure 4.2.
2 q Switch on the tested instrument and select line impedance function.
3 q The same as fault loop impedance function.
4 q The same as fault loop impedance function (line impedance will be
measured instead ofloop).
5 q Perform line impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
11 Ω– 12 Ωrange in most cases).
6 q The same as fault loop impedance function (line impedance will be
measured instead ofloop).
7 q Perform line impedance measurement with the tested instrument.
q Write down measurement result for documentation purposes (it will be in
1 Ω– 2 Ωrange in most cases).
8 q Calculate the difference between LOOP+11 Ωand LOOP+1 Ω
measurement results – it has to be close to 9.8 Ω(see Eurocheck
technical specification).
q If impedance difference deviates significantly from 9.8 Ω, it is verylikely
the tested instrument is damaged. Send it to your distributor or
manufacturer for repairand/or readjustment.

CS 2099 Eurocheck Eurocheck operation
16
4.8 RCD trip-out time calibration
Eurocheck simulatesan RCD with I n of30 mA and trip-out time of 50 ms. Trip-out time
calibration will not trip an RCD ifit’s present in installation where Eurocheck is
connected, regardless ofselected I n current.
Caution:
q Payspecial attention when selecting appropriate I n current. It should be set
to 30 mA, and multiplier should be set to x1. Otherwise the reading oftrip-out
time maybe wrong.
RCD trip-out time calibration can be performed with universal test cable, plug cable or
even plug commander.
Step Action
1 q Connect the tested instrument into EurocheckRCD/Fault loop output
using one ofavailable cables (plug cable, plug commander, universal
test cable); followconnection diagrams shown in Figure 4.1 and Figure
4.2.
2 q Switch on the tested instrument and select RCD trip-out time function
(usuallydenoted as RCD t).
q Set I n to 30 mA and current multiplier to x1.
3 q Connect Eurocheck into mains wall socket and enable itsoutput.
q Observe anywarnings displayed on the tested instrument and
Eurocheck.
q If Eurocheck signals incorrect L and N polarity, reverse connection.
4 q Select RCD calibration function using RCD/LOOP button (RCD LED
lights when the function is selected).
q Observe anywarnings displayed on the tested instrument and
Eurocheck. If anyis present, remove the causes before proceeding.
5 q Perform RCD trip-out time measurement with the tested instrument.
q 30 mA RCD test current is verified simultaneously(chapter 4.9).
q Write down measurement result for documentation purposes.
6 q If measured trip-out time deviates significantlyfrom 50 ms, it is very
likelythe tested instrument is damaged. Send it to your distributor or
manufacturer for repairand/or readjustment.
7 q Repeat steps 5 and 6 with reverse polarityof test current in RCD trip-out
time function (ifthe tested instrument enablesreverse polarityselection).
Note:
q Consider accuracyofRCD trip-out time measurement when evaluating
calibration results (accuracyis defined in User manual ofyour instrument).

CS 2099 Eurocheck Eurocheck operation
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4.9 RCD measuring current I n=30 mAverification
This test is part ofRCD trip-out time calibration and couldn’t be performed separately–
it is valid onlyfor I n =30 mA. Refer to chapter 4.8 for more information.
It is essential that the test instrument measuring current is within certain limits. For
example, standard EN 61557 defines lowlimit as I n – 0 %, and high limit asI n + 20
%. Metrel test instruments has even narrower specification, high limit is defined as
In + 10 %.
When RCD trip-out time measurement is performed Eurocheck automaticallyindicates if
test current was too lowor too high (LEDs CURRENTLO or CURRENTHI light
respectively). Eurocheck lowlimit indication is set to 28 mA, and high limit to 35 mA.
4.10Insulation resistance calibration
Eurocheck offers 2 insulation resistance values for calibration: 2 MΩand 50 MΩ. It is
always possible (and recommended) to add third value into your calibration procedure –
0 Ω(short-circuited test leads).
It is necessaryto calibrate insulation resistance function with all available measuring
voltages. If measuring voltage is set continuously, it is recommended to perform
calibration with the following voltages: 50 V, 100 V, 250 V, 500 V and 1000 V.
Fault loop impedance calibration can be performed with universal test cable or tip
commander. Make sure to followconnection instructionsfor the tested instrument
(determine the leadsof the test cable which are used for this measurement). Generic
connection diagram is shown in Figure 4.3.
Figure 4.3: Performing insulation resistance calibration using universal test cable
P
E
N
L

CS 2099 Eurocheck Eurocheck operation
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Step Action
1 q Connect tested instrument into Eurocheckinsulation resistance test
sockets using universal test cable, followconnection diagram shown in
Figure 4.3.
2 q Switch on the tested instrument and select insulation resistance function.
q Set the first measuring voltage.
3 q It is not necessaryto power on Eurocheck when performing insulation
resistance calibration.
q Observe anywarnings displayed on the tested instrument. If anyis
present, remove the causes before proceeding.
4 q Perform insulation measurement with the tested instrument.
q Write down measurement result for documentation purposes.
5 q If measured insulation resistance deviates significantlyfrom reference
value, it is verylikelythe tested instrument is damaged. Send it to your
distributor or manufacturer for repair and/or readjustment.
6 q Repeat steps 4 and 5 with the other reference insulation resistance
value.
7 q Set another insulation measuring voltage and repeat steps 4 – 6.
q Make sure to select all available measuring voltages.
Notes:
q Some instruments (like MI 3101 – EurotestAT) support measurement ofall three
insulationsin standard mains cable (between L and N, L and PE, N and PE). In
such case it is necessaryto calibrate each insulation measurement separately.
q It is advisable to perform at least three consecutive measurements to verify
stabilityof results. Ifthe tested instrument supports continuous insulation
measurement it is advisable to test this functionalityas well (function is usually
engaged bypressing and holding TESTbutton).
4.11LowΩand continuityresistancecalibration
Eurocheck offers 3 low resistance values for calibration: 0.5 Ω, 5 Ωand 15 Ω. It is
always possible (and recommended) to add fourth value into your calibration procedure
–
0 Ω(short-circuited test leads).
Metrel installation test instrumentsusuallyoffer 2 distinctive functions for measuring low
resistances. LowΩusuallystands for measuring lowresistances with 200 mA test
current, often with automatic polarityreversal. Continuitydenotes a function with lower
measuring current, usuallyaround 7 mA. Both functions can be calibrated with
Eurocheck.
Lowresistance measurement calibration can be performed with universal test cable or
tip commander. Make sure to followconnection instructions for the tested instrument
(determine the leadsof the test cable which are used for this measurement). Generic
connection diagram is shown in Figure 4.4.

CS 2099 Eurocheck Eurocheck operation
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Figure 4.4: Performing low resistance calibration using universal test cable
Step Action
1 q Switch on the tested instrument and select LowΩfunction (±200 mA
measuring current).
q Compensate measurement leads resistance (see User manual of your
instrument for further instructions).
2 q Connect tested instrument into Eurochecklowresistance test sockets
with universal test cable, followconnection diagram shown in Figure 4.4.
3 q It is not necessaryto power on Eurocheck when performing insulation
resistance calibration
q Observe anywarnings displayed on the tested instrument. If anyis
present, remove the causes before proceeding.
4 q Perform resistance measurement with the tested instrument.
q Write down measurement result for documentation purposes.
5 q If measured resistance deviates significantlyfrom reference value, it is
verylikelythe tested instrument is damaged. Send it to your distributor
or manufacturer for repair and/or readjustment.
6 q Repeat steps 4 and 5 with other reference resistance values.
7 q Select continuityfunction and repeat steps 4 – 6.
q Compensation oftest leads, performed in LowΩfunction, usuallyapplies
also for continuitymeasurement.
Notes:
q Most Metrel installation test instrumentsuse L and N measuring leads of
universal test cable to perform lowresistance measurements. However, there are
exceptions to this rule like MI 3101 – EurotestAT, which uses N and PE leads.
q When calibrating LowΩfunction make sure that R+ and R- values are also close
to reference value! If this is not the case, check measurement cable, or use
universal multimeter to measure reference resistors (make sure to reverse
polarity). Contact your local distributor or manufacturer for further information.
P
E
N
L

CS 2099 Eurocheck Eurocheck operation
20
4.12Voltage and frequencycalibration
Eurocheck offers a.c. voltage source of 50 V (at 240 V mains voltage). This source can
be used for voltage and frequencycalibration. It is possible (and recommended) to
include second value into your calibration procedure – 0 V (short-circuited test leads,
not open). Frequencyis equal to mains and isusuallyveryclose to 50 Hzor 60 Hz.
Most Metrel installation test instrumentsmeasure all three line voltages: UL-N, UL-PE and
UN-PE. Newer models offer special function where all three voltages can be monitored at
the same time. Older models require that separate measurements ofall three voltages
are performed in different functions (like RLINE – UL-N, RLOOP – UL-PE and RN-PE – UN-PE).
In some models it is possible to use phase rotation function to measure all voltages at
the same time. Refer to the User manual of your instrument for more information.
However, onlyone voltage can be calibrated at a time, since Eurocheck offers only2-
lead connection. Leave the unused lead disconnected.
Voltage and frequencymeasurement calibration can be performed with universal test
cable or tip commander. Onlyuniversal test cable makes possible calibration ofall 3 line
voltages. Make sure to followconnection instructions for the tested instrument. Generic
connection diagram is shown in Figure 4.5.
Step Action
1 q Connect tested instrument into Eurocheckvoltage test sockets using
universal test cable, followconnection diagram shown in Figure 4.5; start
with L and N leads (UL-N calibration).
2 q Switch on the tested instrument and select appropriate voltage
measurement function.
q Start voltage measurement manuallyifnecessary.
3 q Connect Eurocheck into mains wall socket and enable itsoutput.
q Observe anywarnings displayed on the tested instrument and
Eurocheck.
q If Eurocheck signals incorrect L and N polarity, reverse connection.
4 q Perform voltage and frequencymeasurement with the tested instrument.
q Write down measurement result for documentation purposes.
5 q If measured voltage or frequencydeviates significantlyfrom reference
values, it is verylikelythe tested instrument isdamaged. Send it to your
distributor or manufacturer for repair and/or readjustment.
6 q Connect another pair ofmeasurement leads to voltage source (L and
PE, N and PE) and repeat steps 4 -5.
Notes:
q Stabilityofreference voltage depends on mains voltage fluctuations. Use stabile
reference a.c. source with 240 V output if better accuracyis necessary.
Alternativelymeasure reference voltage with universal DMM simultaneously
(accuracyclass 1 % orbetter).
q Calibration value represents safe a.c. voltage limit as defined in European LVD
directive and is often used asa safe contact voltage limit when testing RCDs.
q When calibrating 3-voltage measurement system unused voltmeters mayshow
irregular results (this is hardware dependent and presents no problem).
q When using 230 V source the reference voltage is 47.9 V.