Gossen MetraWatt METRATESTER 5+ User manual

Operating Instructions
3-348-580-15
29/7.18
METRATESTER 5+
Tester for DIN VDE 0701-0702

2 GMC-I Messtechnik GmbH
(1) Mains plug
(take-up spool at back of housing
for mains cable)
(2) Signal lamp PE for testing the
mains protective conductor
(3) Alligator clips for attachment
to the test probe (3a)
(3a) Test probe
(4) Contacting surface for contact finger
(5) Measuring function selector switch
RSL Protective Conductor Resistance
RISO Insulation Resistance
IEA Equivalent Leakage Current
IAContact or Leakage Current
(for confirmation of absence of voltage)
IDiff Residual Current
INetz Load current at mains outlet
UNetz Mains Voltage
(6) Connector jack/terminal for testing for
contact current at conductive parts at
the DUT
(7) Mains outlet
(8) Test socket
(9) Connector jack/terminal for DUT
phase conductors (wired parallel
to the socket)
(10) Connector jack/terminal for DUT
protective conductor (wired parallel
to test socket)
(11) LCD display (description see page 24)
(12) Carrying handle
(13) Error lamp
(8) (9) (10) (11) (12)
(7)
(6)(5)
(4)
(3)
(2)
(1)
(13)
(3a)

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Display
Display text subject to change without notice.
Meanings of Symbols on the Instrument
Continuous, doubled or reinforced
insulation
Warning concerning a point of danger
(attention: observe documentation!)
Indicates EC conformity
This device may not be disposed with the trash. For further details on the WEEE
marking, please refer to our website www.gossenmetrawatt.com and enter
search key ’WEEE’.
IDiff mA INetz A M
RSL
>0.3
>1.0
RISO
<0.5
<2.0
IEA >7.0
IA>0.25
>0.5
mA
mA

IDiff mA INetz AU
Netz V
Insulation
Resistance
PE
Resistance
Equivalent
Leakage Current
Leakage Current/
Contact Current
Residual
Current
Secondary
Current Indication of Limit Values
Mains
Voltage
KS 13 Accessory Cable Set
!

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Contents Page
1 Safety Features and Precautions ..................................................................................5
2 Applications ...................................................................................................................6
3 Operating and Display Elements ...................................................................................6
3.1 Error and Limit Value Messages ....................................................................................................... 8
4 Mains Connection ..........................................................................................................9
4.1 Connecting the Tester ...................................................................................................................... 9
4.2 Testing Protective Conductor Potential ............................................................................................. 10
4.3 Measuring Mains Voltage ................................................................................................................ 10
4.4 Connecting the Device Under Test to the Test Instrument ................................................................. 11
4.4.1 DUT with protectiv conductor ( Safety Class I) and Mains Plug .......................................................... 11
4.4.2 Safety Class II DUT ........................................................................................................................ 11
4.4.3 DUT Without Mains Plug or Safety Class III DUT ............................................................................... 11
4.4.4 3-Phase DUT ................................................................................................................................. 11
4.5 General Measuring Procedures ....................................................................................................... 12
4.6 Residual Current Monitoring ............................................................................................................ 12
5 Testing Devices per DIN VDE 0701-0702 ....................................................................13
5.1 General ......................................................................................................................................... 13
5.2 Visual Inspection ............................................................................................................................ 14
5.3 Measuring Protective Conductor Resistance ..................................................................................... 14
5.3.1 Special case: permanently connected instruments ...........................................................................15
5.4 Measuring Insulation Resistance ..................................................................................................... 16
5.5 Measurement of protective conductor current ................................................................................. 17
5.5.1 Measuring Equivalent Leakage Current ............................................................................................ 18
5.5.2 Measuring Residual Current ............................................................................................................ 18
5.6 Measuring Contact Current ............................................................................................................. 19
5.6.1 Measuring Equivalent Leakage Current ............................................................................................ 19
5.6.2 Measuring Residual Current ............................................................................................................ 20
5.6.3 Direct Method ................................................................................................................................ 21
6 Measuring Load Current from the Mains Outlet ..........................................................22
7 Technical Data ............................................................................................................23
8 Maintenance – Calibration ..........................................................................................26
9 Repair and Replacement Parts Service
Calibration Center and Rental Instrument Service ......................................................27
10 Product Support ..........................................................................................................28

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1 Safety Features and Precautions
The tester is manufactured and tested in accordance with the following standards:
IEC/EN 61010-1/VDE 0411-1 Safety regulations for electrical measuring, control,
regulating and laboratory devices – general requirements
and
DIN VDE 0404-1/-2: Testing and measuring equipment for checking the electric safety
of electric devices; Part 1: general requirements, and Part 2:
Testing equipment for tests after repair, change or in case of repeat tests
When used for its intended purpose, the safety of the user, the test instrument and the device
under test (electrical equipment) is assured.
Read the operating instructions carefully and completely before placing your test instrument into ser-
vice, and follow all instructions contained therein. Make sure that the operating instructions are avail-
able to all users of the instrument.
The tests may only be conducted under the supervision of a qualified electrician. The user must be in-
structed by a qualified electrician in the performance and evaluation of the test.
Observe the following safety precautions:
• The instrument may only be connected to electrical supply systems with 230 V/240 V
which conform to the valid safety regulations (e.g. IEC 60364, VDE 0100) and are pro-
tected with a fuse or circuit breaker with a maximum rating of 16 A.
• No measurements within electrical systems are allowed.
• Be prepared for the occurrence of unexpected voltages at devices under test. For exam-
ple, capacitors may be dangerously charged.
• Make certain that connector cables are not damaged, e.g. damaged insulation, interruptions etc.
Attention!
!
Devices under test may only be connected to the mains outlet after they have
successfully completed safety testing in accordance with DIN VDE 0701-702!
Opening of Equipment / Repair
The equipment may be opened only by authorized service personnel to ensure the safe and
correct operation of the equipment and to keep the warranty valid.
Even original spare parts may be installed only by authorized service personnel.
In case the equipment was opened by unauthorized personnel, no warranty regarding per-
sonal safety, measurement accuracy, conformity with applicable safety measures or any con-
sequential damage is granted by the manufacturer.
Repair, Parts Replacement and Balancing
Voltage conducting parts may be exposed when the device is opened. The device must be
disconnected from all sources of voltage before repair, replacement of parts or balancing. If
repair or balancing of an open, live device cannot be avoided, this may only be performed by
trained personnel who are familiar with the dangers involved.
Errors and Extraordinary Strains
If it may be assumed that the device can no longer be operated safely, it must be removed
from service and secured against unintentional use. Safe use can no longer be relied upon,
• if the device demonstrates visible damage,
• if the device no longer functions,
• after lengthy periods of storage under unfavorable conditions.

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2 Applications
The tester is intended for the testing and measurement of repaired or modified electrical
devices in accordance with DIN VDE 0701-702. These regulations require the measurement
of protective conductor resistance, insulation resistance and equivalent leakage current for
repaired or modified electrical devices, as well as testing for the absence of voltage at
exposed, conductive parts for data processing systems and office machines.
Testing for the absence of voltage at the mains connection protective conductor and line volt-
age measurements can also be performed with this instrument. The device under test can be
connected to mains power at the mains outlet integrated into the tester, which provides for
the measurement of power consumption and the testing of functions.
Note!
Limit values displayed at the instrument make reference to periodic testing require-
ments set forth in VDE 0702: 1995.
3 Operating and Display Elements
(1) Mains Plug
The tester is connected to the 230 V mains outlet with the mains plug. If no earthing contact
socket is available, or if only three-phase current is available, the KS13 cable set can be used
to establish a connection.
The mains connection must be fused. Maximum nominal rating: 16 A!
(2) PE Signal Lamp for Protective Conductor Testing
The PE signal lamp lights up, if a potential difference of 100 V occurs
between the contacting surface (4) and the earthing contact at the mains plug (1).
(3) Alligator clip (gripper clip for attachment to the test probe)
Connect the housing of the device under test with the alligator clip for measurement of pro-
tective conductor resistance.
(4) Contacting Surface for Contact Finger
The PE signal lamp (2) lights up, if a potential difference of 100 V occurs between the PE
protective conductor at the mains plug (1) and the contacting surface.
The contacting surface is electrically isolated from all terminals, as well as from the measuring
circuit, and thus conforms to protection class II!
(5) Measuring Function selector Switch
Measuring functions can be selected with the measuring function selector switch. Displayed
values at intermediate switch positions have no significance.
(6) Connector Jack/Terminal for Measurement of Contact Current at Conductive
Components at the Device Under Test
This terminal is intended for the measurement of contact current at exposed conductive parts
which are not connected to the protective conductor.
(7) Mains Outlet
The DUT can be connected to the integrated mains outlet for the measurement of power
consumption and functions testing.
Residual current measurement is performed in this way as well.
Overcurrent protection is provided by the mains fuse or circuit breaker, see (1).

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(8) Test Socket
The DUT is connected to the test socket for the measurement of protective conductor resis-
tance, insulation resistance and equivalent leakage current in accordance with
DIN VDE 0701-0702, if the DUT is equipped with a mains plug.
(9) Connector Jack/Terminal for DUT Phase Conductors
This terminal is wired in parallel to the two short-circuited phase conductor terminals at the
test socket (8). The DUT phase conductors can be connected to this jack/terminal, if the DUT
is not equipped with a mains plug.
(10) Connector Jack/Terminal for DUT Protective Conductor
This terminal is wired in parallel to the protective conductor terminal at the test socket (8). The
DUT protective conductor can be connected to this jack/terminal, if the DUT is not equipped
with an earthing contact plug. Beyond this, exposed conductive parts at the device under
test must be connected to this jack for insulation testing and the measurement of equivalent
leakage current.
(11) LCD Display
Measured values are displayed in digital form at the LCD.
(12) Carrying Handle
The carrying handle can be folded out.
(13) Error Lamp
The red error lamp indicates that limit values have been exceeded during the measurement of
protective conductor and insulation resistance, equivalent leakage, contact and leakage cur-
rent, as well as residual current.
KS 13 Accessory Cable Set
The KS 13 cable set consists of a adapter socket with three permanently connected cables,
3 measurement cables, 3 plug-on pick-off clips and 2 plug-on test probes. With the KS 13
the tester and the DUT can be connected, even if no earthing contact socket is available for
the mains connection, or no earthing contact plug is present at the DUT.

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3.1 Error and Limit Value Messages
The following limit values are indicated
1) Resistance between housing and mains plug in connector cables up to a length of 5 m
2) For extension cables, there is an additional resistance of 0.1 for each
additional 7.5 m, up to a maximum, however, of 1 
3) For safety class I devices with activated heating elements
(if heating power > 3 kW and RISO < 0.3 M:
leakage current measurement required)
4) Limit value per DIN VDE 0702:1995
5) This limit value applies for all-pole switches
(corresponds to a doubling of the limit value
or, respectively, a 50 % reduction of the actual measuring current)
Residual Current Limit Value Violations
The METRATESTER 5 is equipped with a selector switch independent, residual current monitoring
function. If the red error lamp lights up and no message regarding a limit value violation
appears at the display, residual current at the mains outlet is dangerously high – regardless of
the selector switch setting. If this is the case, it is advisable to measure residual current (dif-
ferential current) by turning the selector switch to the “IDIFF” position.
Only the displayed numeric value should be considered when evaluating residual current with
the selector switch in the “IDIFF” position. The error lamp may be caused to light up as a result
of residual current monitoring for values of as low as approximately 3.2 mA. The error lamp
lights up in any case as of 3.5 mA.
Error Message Condition PE Signal Lamp
Protective conductor potential, at mains UB> 100 V If contact surface is contacted
Measurement
Error
Condition per
Standard
Test Instrument Indicates When Limit Values
Are Exceeded
Red Error Lamp
Continuously Lit
Limit Values are
Displayed
Continuous Acoustic
Signal (Beeper)
Protective
Conductor
Resistance
RSL >0.31) >0.3—
RSL >12) >1
Insulation
Resistance
Heating 3):
RISO <0.3M<0.5M4) 
SCI:
RISO <1.0M<2.0M—
SCII:
RISO <2.0M—<2.0M—
Equivalent
Leakage Current
IEA >3.5mA ——
>7.0mA
5) 
Leakage/Contact
Current
(Substantiation
of Absence of
Voltage)
Part 240:
IA>0.25mA >0.25mA —
IA>0.5mA >0.5mA 
Residual Current IDiff 3.5 mA —

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4 Mains Connection
4.1 Connecting the Tester
➭Connect the tester to the 230 V mains with the mains plug (1). If no earthing contact
socket is available, or if only a three-phase socket is available, connection of the phase
conductors, the neutral conductor and the PE conductor can be accomplished with the
help of the adapter socket. It includes 3 permanently connected cables and is included
with the KS 13 accessory cable set.
Attention!
!
The instrument may only be connected to electrical supply systems with 230 V/
240 V which conform to the valid safety regulations (e.g. IEC 60364, VDE 0100) and
are protected with a fuse or circuit breaker with a maximum rating of 16 A.
The pick-off clips on the cables at the adapter socket may only be connected in the
voltage-free condition!
If mains voltage is present, characters are displayed at the LCD regardless of the position of
the measuring function selector switch, even if no DUT has been connected. Thus the pres-
ence of characters at the display indicates the presence of voltage – independent of measur-
ing function selector switch position.
The mains voltage value is indicated at the display in the “UNetz 250 V” selector switch posi-
tion. In all other switch detent positions, characters are displayed which have no correlation
to a measured value, if a DUT has not been connected.
KS13
KS13
KS13
yellow-green
yellow-green
yellow-green
only possible in TN-C systems
L1
N
PE
L1
L2
L3
N
PE
L1
L3
N
L2

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4.2 Testing Protective Conductor Potential
➭Bring the contact finger into contact with the contacting surface (4) and, at the same
time, with a grounded object (e.g. a water pipe).
The PE signal lamp (2) must not light up! Potential between the mains plug protective
conductor (1) and the contacting surface (4) is then 100 V.
Note!
The PE signal lamp (2) does not light up, if no mains voltage is present between L and
N at the mains plug (1), or if L and PE are reversed at the mains connection. If, after
having connected the DUT in accordance with chapter 4.1, page 9, you determine,
that no characters are displayed at the LCD, the mains connection should first be
inspected – e.g. with the PROFITEST MASTER tester.
However, if the PE signal lamp (2) lights up when contact is made with the contacting surface
(4), potential between the protective conductor at the mains plug (1) and the contacting sur-
face (4) is > 100 V, i.e. voltage is present at the protective conductor or the protective con-
ductor is not connected.
Note!
Stray voltages may occur due to handling of the DUT, which cause the PE signal lamp
(2) to light up. For example, this may occur if a device is held in the hand which has
been connected to the test socket (8) due to the resultant occurrence of a capacitive
voltage divider. Touch a grounded object as described above in this case.
Attention!
!
Voltage at the mains protective conductor (phase conductor L at protective earth
conductor PE: incorrect wiring of mains socket ) also distorts measured values for
the following tests:
– Measurement of contact current per DIN VDE 0701-0702
– Residual current measurement
4.3 Measuring Mains Voltage
➭Set the measuring function selector switch to “UNetz 250 V”
➭Read the measured value at the LCD.
Mains voltage must lie within the allowable range of 207 to 253 V.