GMW TG uni 1 User manual

TG uni 1
Appliance tester for
testing safety measures in accordance
withDINVDE0701and0702
Operating Manual
Version 1.07

Operating manual for the TG uni 1 appliance tester
Contents
Contents Page
1. Safety information ..........................................................4
2. Introduction .......................................................................4
2.1 Model and type designation / identification ...............................5
2.2 Product description ................................................................5
2.3 Other equipment features ...................................................5
2.4 Scope of delivery ....................................................................5
2.5 Optional accessories ...............................................................5
2.6 Transport and storage .............................................................5
3. Safety instructions ...............................................................6
4. Appropriate usage ..........................................................7
5. Operating elements ...............................................................8
5.1 Meaning of the signal tones .........................................................8
6. Commissioning ...............................................................9
6.1 Basic settings of the tester ...................................................9
6.2 Compensation of the measuring line ..........................................10
6.3 Setting the measuring method for
protective conductor current measurement ..................................10
6.4 Setting the date ............................................................11
6.5 Selection of the data memory ....................................................11
6.6 Changing the duration of a test stage ............................................12
6.7 Entering the name of the inspector ..............................................12
6.8 Customer-specific settings ...............................................12
7. Conducting tests:
General information on
DIN VDE 0701 and DIN VDE 0702 ...........................................13
7.1 Why ..................................................................................13
7.2 What ...............................................................................13
7.3 How ...............................................................................13
Contents Page
8. Conducting tests:
Explanation of terminology ....................................................14
8.1 Touch current (IT) ..................................................................14
8.2 Differential current (ID)............................................................14
8.3 Substitute leakage current (ISL) .....................................................14
8.4 Insulation resistance (RINS) ..........................................................15
8.5 Protection class I (PC I) ...............................................................15
8.6 Protection class II (PC II)..............................................................15
8.7 Protection class III (PC III) ............................................................15
8.8 Protective conductor current (IPE) ...................................................16
8.9 Protective conductor resistance (RPE) ............................................16
8.10 Visual inspection .......................................................................16
9. Conducting tests in accordance with
DIN VDE 0701 and DIN VDE 0702:
Definition of standards ...........................................................17
9.1 Visual inspection .......................................................................17
9.2 Measuring the protective conductor resistance ................................17
9.3 Measuring insulation resistance ............................................17
9.4a Measuring the protective conductor current ....................................18
9.4b Measuring touch current ................................................19
9.5 Inspecting the inscriptions ............................................................19
9.6 Function test ......................................................................19
9.7 Documentation ..........................................................................19
9.8 Diagram 1:
Test procedure for devices of protection class I ................................20
9.9 Diagram 2:
Test procedure for devices of protection classes II und III ...................21
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Contents Page
10. Conducting tests with the appliance tester in accordance
with DIN VDE 0701 and DIN VDE 0702, PC I .........................22
10.1 Visual inspection .......................................................................23
10.2 Protective conductor resistance ....................................................23
10.3 Insulation resistance ..................................................................24
10.4a Protective conductor current (substitute leakage current) ...................25
10.4b Protective conductor current ........................................................25
10.5 Function test ......................................................................26
10.6 Inspecting the inscriptions ............................................................26
10.7 Documentation ..........................................................................27
11. Conducting tests with the appliance tester in accordance
with DIN VDE 0701 and DIN VDE 0702, PC II ........................29
11.1 Visual inspection .......................................................................30
11.2 Insulation resistance ..................................................................30
11.3a Touch current (substitute leakage current) .......................................31
11.3b Touch current ......................................................................31
11.4 Function test ......................................................................32
11.5 Inspecting the inscriptions ...........................................................32
11.6 Documentation ..........................................................................33
12. Conducting tests with the appliance tester in accordance
with DIN VDE 0701 and DIN VDE 0702, PC III .......................35
12.1 Visual inspection .......................................................................36
12.2 Insulation resistance ..................................................................36
12.3 Documentation ..........................................................................37
13. Conducting tests with the appliance tester in accordance
with DIN VDE 0702, all protection classes ...........................39
14. Conducting tests with the appliance tester in accordance
with DIN VDE 0701 and DIN VDE 0702 - special test procedure
according to customer-specific settings..............................40
Operating manual for the TG uni 1 appliance tester
Contents
3
Contents Page
15. Technical data ....................................................................42
15.1 Technical data for function tests ..........................................43
15.2 General technial data ........................................................43
16. Manifacturer’s guarantee conditions ........................................44

1. Safety information
Tests on the electrical safety of electrical appliances may only be carried
out by qualified electricians or under their supervision. Carefully read the
following safety information before commissioning the TG uni 1 appliance
tester (referred to as appliance tester or tester in the following).
Symbols used in the operating manual and on the tester:
Warning:hazardous situation. Follow the operating manual.
Caution! Dangerous voltage, danger of electric shock.
Note. Make sure you follow the manual.
CE CE mark of conformity.
The operating manual contains information and notes which are
necessary for the safe operation and use of the tester. Before use
(commissioning / installation) of the tester the operating manual
should be carefully read through and followed in all points.
If the manual is not observed or if you fail to observe the warnings
and notes, serious injury to the user and damage to the tester can
occur.
All the technical data and quoted standards in this manual are up-
to-date at the time of going to press and have been determined to
the best of our knowledge, nevertheless this data may be subject
to errors and printing errors. Therefore no legal responsibility or
any other liability can be accepted for incorrect information or
the conseqences of this information.
The definitive document for carrying out tests is the
original version of the respective regulation or standard.
There is no intention to infringe on any existing patents and
other property rights with this publication.
2. Introduction
You have acquired a high-grade device from the company Gossen Müller &
Weigert (GMW), with which you can carry out repeatable measurements
over a very long period of time. The product was calibrated during the
manufacturing process in accordance with the specified operating
procedures. All quality-relevant activities and processes carried out in GMW
are permanently monitored as part of the quality management system in
accordance with DIN EN ISO 9001:2000.
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Operating manual for the TG uni 1 appliance tester
Safety information
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2.1 Model and type designation / identification
A type plate and serial number sticker are situated on the inside of the
housing cover (behind the accessories bag).In the case of queries, always
give the product designation and serial number.
2.2 Product description
The appliance tester has been developed for carrying out the following
measurements for testing the safety of electrical appliances in accordance
with DIN VDE 0701 and 0702 (BGV A3):
– Measuring protective conductor resistance with compensation of the
measuring line
– Measuring insulation resistance
– Measuring substitute leakage current
– Measuring protective conductor current (direct method or as differential
current)
– Measuring touch current
– Function test with measurement of mains voltage, load current, active
power, apparent power and reactive power, power factor and
frequency
– Testing of non-heating devices and extension cables
2.3 Other equipment features
– Stable, dust-proof carrying case as housing
– Large, easy-to-read touch-screen for operating the tester (backlit)
– Good/bad display in plain text (suitable for technically trained persons)
– Connection for barcode scanner for reading-in the test object’s ID
numbers
– USB-interface
– MMC-card for saving and transporting measured data
– PC standard software for saving and printing measurement reports
2.4 Scope of delivery
1 TG uni 1 appliance tester
1 safety test line, length 100 cm
1 safety crocodile clip, clip width 30 mm
1 safety test tip
1 USB cable, length 150 cm
1 MMC memory card 128 MB
1 CD-ROM with Windows®-PC standard software
1 accessories bag with velcro fastener and quick guide
1 operating manual
2.5 Optionale accessories
(not included in delivery)
– Barcode scanner
– RS232 PC interface cable, length 200 cm
– Measuring adapter for testing devices with tree-phase connection (in
preparation for plug connectors CEE 3-pole, 16 A, 230 V; CEE
5-pole, 16 A, 400 V and CEE 5-pole, 32 A, 400 V)
– Adapter for checking extension cables
– PC software with database functions (customer master data, device
master data, test data, analysis function, data backup)
2.6 Transport and Storage
Please retain the original packaging for dispatch at a later date, e.g. for
calibration. Transport damage that occurs due to inadequate packaging is
not covered by the manufacturer’s guarantee.
The tester must be stored in a dry, closed room. If the device it transported
in extreme tenperatures, it requires at least 2 hours acclimatisation before
being switched on.
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Operating manual for the TG uni 1 appliance tester
Introduction

3. Safety instructions
The appliance tester TG uni 1 was constructed and tested in accordance
with the applicable safety regulations and left the workshop in a faultless
safety condition. In order to maintain this condition and ensure safe
operation, the user must observe the instructions and warnings contained in
this operating manual.
With all work, the applicable accidend prevention regulations of the
trade associations for electrical systems and equipment must be
observed.
To avoid electric shock, the applicable safety regulations and DIN-
VDE regulations regarding high touch voltage must be observed
without fail when working with voltages greater than 120V (60 V)
DC or 50 V (25 V) eff. AC. The values in brackets apply for
restricted areas (e.g. medicine, agriculture).
Measuring at a dangerous proximity to electrical systems should only be
carried out under the instruction of a responsible electrician, and never
alone.
Check the tester and the connecting cables for external damage before
every new operation.
Make sure that the tester and the connecting cables are in faultless
condition. The tester may not be used if one or more functions fail or if
functional readiness is not evident.
The measuring lines and the measuring accessories may only be
touched in the designated handling areas.
Touching measuring connections, e.g. test tips must be avoided
under all circumstances.
If the safety of the operator is no longer guaranteed, the tester must
be decommissioned and secured against unwanted use. This is
the case if the device:
– shows obvious signs of damage
– no longer carries out the required measurements
– has been stored in adverse conditions for too long
The tester may only be used in the operating and measuring ranges
specified under Technical Data.
Prevent overheating of the tester by exposure to direct sunlight.
Only this will guarantee faultless functioning and a long sevice life of the
device.
Never open the housing of the tester because of the danger of high
voltages. The tester contains no parts that can be replaced by the user.
Only let the tester be serviced by qualified personnel.
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Operating manual for the TG uni 1 appliance tester
Safety instructions
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4. Appropriate usage
The tester may only be used under the conditions and for the purposes for
which it has beeen designed. It is particularly important to observe the
safety instructions and the technical data regarding ambient conditions and
usage in a dry environment.
The tester may not be used for measurement in electrical systems.
The tester may only be plugged into a properly connected earthed mains
socket. This may be protected with a maximum 16 A!
The tester is designed for operation with a rated voltage of 230 V AC 50 Hz,
it may never be connected to higher voltage.
The maximum output current of the mains socket is 16 A!
The tester may not be used for constant measuring.
Operational safety is no longer guaranteed in the case of modifications or
conversions that have not been carried out by the manufacturer.
Maintenance or calibration work may only be carried out by the
manufcturer.
If the tester has been exposed to an electromagnetic field, this can impair
the functionality of the tester.
The tester may not be used near to explosive gasses, steam or dust, or in
a damp environment.
In order to avoid damaging the testing device, the test socket and the
measurement connections may not be connected to an external voltage
source.
Only the supplied original measuring lines or equivalent safety measuring
accessories may be used!
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Operating manual for the TG uni 1 appliance tester
Appropriate usage

5. Operating elements
Explanation of the tetster’s connections, operating elements and displays
Mains cable with mains plug
forconnectingtheTesterto
themainspowersupply
230V+/-15%,50 Hz
Thermalfuseforthetest
objectand tetster F16 A
ON / OFF switch
Cardslot foranMMCmemory
card
USBsocketforconnectinga
PC
RS232socketfor
connectingabarcode
scanner
Touch-screen(LCdisplayandcontrolscreen)
Test/mains socketfor connectingthe testobject withearted
plug, 230V 16 A,50 Hz
Connectingsocket‘PE’(yellow/green),parallel
connectionof theprotectiveconductorof the
testsocket,for connectingthetest object
withoutanearthedmainsplug
Front panel, Fig. 1
connectingsocket´Probe´(red),forthetestline
whenmeasuringRPE andRINS
Optional connectingsockets(VDE0751):
´L1´(black)
´N´(blue)
´IEPA´(red)
5.1 Meaning of the signal tones
– short single tone: confirmation of button press
– short double tone: end of a test stage with automatic
procedure
– long single tone,
continuous tone: fault
Storagecompartmentforthe
mainscable
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Operating manual for the TG uni 1 appliance tester
Operating elements
Casehousing
Fig. 2
Housingcoverwith2snapfasteners
Accessories bag with quick guide
Handle(fold-away)
Symbols used in the LC display:
-internalmemory
-MMCmemorycard

6. Commissioning
The tester is equipped with modern touch-screen technology. That means
that the LC display and the control buttons are in one control screen. The
control buttons are always edged.
After activating the mains switch a self-test is carried out. If everything is in
order, the following display appears on the touch-screen as a switch-on
message (Fig. 3):
Continue with large button (Fig. 3).
A display for entering the date appears (Fig. 3a).
6.1 Basic settings of the tester
Press the [Configuration] button in the Main menue (Fig. 4).
The Configuration menue appears (Fig. 5):
Fig. 5
Typedesignation
Relevantstandard
Firmwareversion
Manufacturer
Largebutton
Headline
Functionbuttons:
Testsaccordingtostandard
Testingofindividualparameters
Basicsettingsof thetester
Fig. 3
Fig. 4
Functionbuttons
Symbolfortheinternalmemory
or theMMCmemorycard
Headline
9
Measuringmethodforprotective
conductorortouchcurrent:
DIR.-direct Measurement
(testobjectinsulatedfromearth)
DIF.-differentialcurrentmethod
(Testobject not insulatedfrom
earth)
Operating manual for the TG uni 1 appliance Tester
Commissioning
As the tester does not have its own real-time clock, you are prompted to
confirm the displayed date or enter a new date.
Also see Point 6.4.
After confirmation with the [OK] button the Main menue appears (Fig. 4):
Fig. 3a
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If the following message appears in the display:
‚Fault: zero balance’
and a permanent warning signal sounds, the measuring line resistance is
greater than 2 Ωand cannot be compensated.
The protective conductor resistance test is locked.
In this case the measuring line should be checked or be replaced with a
low-impedance version.
If the measuring line has been successfully compensated – the following
message appears in the display
‚Zero balance OK’.
Press the [Next] button, only then disconnect the line!
6.3 Setting the measurement method for protective conductor
current measurement (also current touch measurement)
In the case of devices of protection class I, on which the insulation
resistance measurement cannot or may not be carried out, the protective
conductor current measurement is an alternative measurement for
determining the insulating capacity.
The protective conductor current can be determined either by the direct
measuring method, the differential current method or the substitute leakage
current method.
The direct measuring method or the differential current method should be
used with test objects that can only be switched on with mains voltage
(also see Point 9.8).
Caution! In this case the test object is supplied with mains
voltage during the test.
The differential current measurement determines the total leakage current of
the test object by measuring the total current of all avtive conductors (L-N).
The differential current measurement must be applied if the test object has
additional earthing connections or cannot be insulated.
Direct measurement can be applied if the test object has no additional
earthing connections or can be insulated.
In order to change the measuring method, press the [Measure] function
button in the configuration menu, see Fig. 5.
The symbol in the headline changes accordingly:
[DIR.] – direct measurement
[DIF.] – differential current method
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Operating manual for the TG uni 1 appliance tester
Commissioning
6.2 Compensation of the measuring line
In order to achieve correct results when measuring the protective conductor
resistance, the resistance of the measuring line must be compensated (zero
balance).
Press the fuction button [Comp.] (Fig. 5).
The zero balance menu appears. Follow the instructions in the display
(Fig. 6): – Connect the test tip/test
clip with the measuring line
and insert the measuring
line plug in the ‚Probe’
socket (Fig. 1).
– Connect the test tip/test
clip with the protective
earthing contact of the test
socket.
Fig. 6

6.5 Selection of the data memory
To save the measurement results, the tester has an internal memory (16
MB) and an MMC memory card (128 MB, supplied with the tester).
The MMC memory card can be used to backup or transfer the
measurement results.
MMC memory cards with a capacity of 128 to 256 MB can be used.
The measurement results can be stored either in the internal
memory or on the MMC memory card.
Use a PC with a USB connection if you wish to completely delete or format
the MMC memory card. After the USB connection has been made the MMC
memory card appears as an external storage medium in the file manager.
From here the card can be deleted or formatted – the file system is
automatically adjusted.
Caution! Formatting a memory card deletes all the data on the
card.
To read out saved measurement results - see the operating manual of the
PC software
Fig. 7
once the date has been set, it remains unchanged in the tester’s
memory until it is reentered or deleted
- the tester is not equipped with a real-time clock!
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Operating manual for the TG uni 1 appliance Tester
Commissioning
6.4 Setting the date
You can set the test date on the tester.
Press the function button [Date] to change to the input screen (Fig. 5). The
date is entered on the touch-sreen by means of the pictured 10-button
keypad (Fig. 7).
The date can be entered in the following formats:
|D.M.YY|, |DD.MM.YY| and |DD.MM.YYYY|.
The set date is safed along with the measuring results of every test and
also appears in the log prinout.
Inserting the MMC memory card:
Insert the memory card, with the label facing down, into the card slot and
slightly press until it engages.
To eject the memory card, press it down until it disengages and pull the
card upwards and out of the slot.
Caution!
Never force the memory card into the card slot of the tester.
The use of force can damage the memory card and the card
slot. If the card is not recognised by the tester, check if it
has been properly inserted.
Press the function button [Memory] in the configuration menu to switch
between the internal memory and the MMC memory card. The symbol in
the headline changes accordingly (Fig. 5):
– internal memory
– MMC memory card
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6.7 Entering the name of the inspector
To enter the name or designation of the inspector, press the function button
[Inspector] in the configuration menu.
The screen changes to an alphanumeric keypad, with which you can enter
the name or the designation of the inspector. The input field has 20
characters (Fig. 9).
You can switch between letter and numeric keys by using the buttons [123]
or [ABC].
The [C] button deletes the last entered character.
Press the [OK] button to confirm the entry.
The entered name is saved in the memory after the tester has been
switched off.
6.8 Customer-specific settings
The scope of functions of the tester can be adapted to customer
specifications. This can simplify the operation of the tester.
These settings do not change the standard conformity of the tester!
You reach the setup menu by pressing the function button [Setup] in the
configuration menu (Fig. 5).
This input area is locked by a code key
(Fig. 10)
Please contact us for further information:
Tel. +49 (0)911 / 3502-0, Fax +49 (0)911 / 3502-307.
Fig. 9
Fig. 10
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Operating manual for the TG uni 1 appliance tester
Commissioning
The entered name is assigned to every test carried out and also
appears in the log printout.
Fig. 8
6.6 Changing the duration of a test stage
With automatic test procedures, the preset duration of every test stage is 5
seconds.
This setting can be changed, if for example the test object requires a longer
time to be switched on.
To do this press the function button [T.-time] in the configuration menu.
Using the 10-button keypad, you can enter a new test time in the next
screen (Fig. 8).
The possible setting range is 3 to 254 seconds.
The factory setting of the tester is 5 seconds per test stage.
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7. Conducting tests:
General information on DIN VDE 0701 and DIN VDE 0702
Why, What, How
7.1 Why?
Electrical systems and equipment must be safe. They have to be
manufactured and operated in such a way that they cannot endanger
people, animals and property.
The legal regulations are primarily anchored in:
– The German Ordinance on Industrial Safety and Health ( BetrSichV)
– The Accident Prevention Regulations (BGV A 3)
– The DIN-VDE standarts harmonised within the EU
The stipulation for transportable devices states:
„The manufacturer or the importer of technical equipment may only bring
this equipment onto the market if, in accordance with the generally
recognised rules of technology, the user or third parties are protected from
danger when using this equipment for its intended purpose, as far as the
form of appropriate usage allows.“
(from the German Ordinance on Industrial Safety and Health )
The operator has to ensure that the electrical systems and equipment are
operated in accordance with the rules pertaining to electrical equipment.
(from BGV A 3 Electrical systems and equipment)
Those who manufacture or modify transportable devices must comply with
the applicable standards, e.g.:
DIN VDE 0700 Part 1 „Household and similar electrical appliances - Safety“.
7.2 What?
Whoever operates, services and repairs transportable devices must
observe the following:
DIN VDE 0701 „Repair, modification and inspection of electrical appliances“
Part 1 as well as the special provisions of this standard
For those commissioned with regular tests, the applicable specifications are
contained in DIN VDE 0702 „Periodic inspection on electrical appliances“.
Requirements for the appliance tester from the VDE regulations:
Safety tests on transportable electrical equipment are based on
– DIN VDE 0701
„Repair, modification and inspection of electrical appliances“
– DIN VDE 0702
„Periodic inspection of electrical appliances“
7.3 How?
Measuring and testing devices must be constructed in accordance with DIN
VDE 0404 „Testing and measuring equipment for checking the electric
safety of electric devices - Part 1: General requirements“.
Insulation and protective conductor measurements are also subject to the
standards DIN VDE 0413 Part 1 and Part 4.
In addition:
DIN VDE 0404 „Testing and measuring equipment for checking the electric
safety of electric devices - Part 2“.
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Operating manual for the TG uni 1 appliance tester
General Information on DIN VDE 0701 and DIN VDE 0702

8. Conducting tests:
Explanation of terminology
8.1 Touch current (IT)
Current that can flow to earth via the person handling the device (test
object).
The measurement is carried out between touchable conductive parts of the
test object and the earth.
The measurement can either be made directly or with the differential current
method.
Direct measurement is applicable if the test object can be insulated from
earth.
In all other cases the differential current method should be used.
The touch current measurement is carried out on test objects in protection
class II with touchable conductive parts, or on test objects in protection
class I, which have touchable conductive parts that are not connected to the
protective conductor.
The measurement is to be carried out in both positions of the mains
plug - the reversal of polarity is automatic with the tester -
extracting and reversing the mains plug is not necessary.
Also see measuring principle circuits on Page 19.
8.2 Differential current (ID)
In terms of the standards DIN VDE 0701/0702, this is the total instantaneous
values of all currents flowing through all active conductors on the mains
side connection of the device (test object).
The differential current method is a measuring method for determining
protective conductor current or touch current.
The total leakage current of a test object can be measured. This measuring
method must be applied if the test object cannot be insulated.
Also see measuring principle circuit M6 on Page 18.
Caution! The test object is supplied with mains voltage
during the test.
8.3 Substitute leakage current (ISL)
Current that would flow through the interconnected active conductors of the
device (test object) and the protective conductor or the touchable conductive
parts at nominal voltage and nominal frequency of the device.
This measuring method determines the leakage current without mains
voltage. It is an alternative measuring method for determining protective
conductor current or touch current.
Also see measuring principle circuit M4a on Page 18.
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Operating manual for the TG uni 1 appliance tester
Explanation of terminology
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8.4 Insulation resistance (RINS)
Ohmic resistance between the conductive parts separated by insulation.
Measurements are taken between the active parts and the body as well as
touchable conductive parts that are not connected to the protective
conductor.
Also see measuring principle circuits on Page 17.
8.5 Protection class I (PC I)
The active parts of the device are protected against direct touching by the
basic insulation. Through connection of the touchable conductive housing
parts to the protective conductor, these are included in the protective action
in the case of indirect touching (fault protection) with the system. The
device has a protective conductor connection (earthed plug).
8.6 Protection class II (PC II)
The active parts are separated by strengthened or double insulation (basic
insulation and additional insulation). This ensures protection against direct
contact.
Protection against indirect contact is also given, since an insulation fault is
practically impossible. Such devices can nevertheless have touchable
metallic housing parts. Devices of protection class II have a mains plug
without an earthing contact.
8.7 Protection class III (PC III)
Devices of protection class III are exclusively connected to protective extra-
low voltage electric circuits.
The protection against dangerous body currents is achieved by the low
voltage and the safe separation to other electric circuits.
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Operating manual for the TG uni 1 appliance tester
Explanation of terminology
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8.8 Protective conductor current (IPE)
Current that flows through the protective conductor from the devices (test
objects) of protection class I, when their bodies are insulated from earth.
A direct measurement is applicable if the test object can be insulated from
earth.
In all other cases the differential current method should be applied, see Point
6.3 (Basic settings of the tester, Page 10).
Also see measuring principle circuits on Page 18.
Caution! The test object is supplied with mains voltage
during the test.
8.9 Protective conductor resistance (RPE)
Resistance between any conductive touchable parts, connected to the
protective conductor for protective purposes, and the earthed contact of the
mains plug, the device plug or the protective conductor, which is constantly
connected to the mains power supply.
During the measurement of the protective conductor resistance, the
connecting cable should be moved, section by section, along its whole
length. This measuring method only applies for devices of protection class I.
Also see measuring principle circuit M1 on Page 17.
8.10 Visual inspection
Testing in accordance with DIN VDE 0701 or 0702 also involves visual
inspection of the device.
According to the standard the devices should be inspected for external
defects (without opening the device) and, as far as possible, for suitability to
the place of installation. In particular, attention should be paid to the
following:
– Damage to the housing
– Defects of the cord connector guard and strain relief fittings
– External damage of the connecting cables
– Unauthorised interference and changes
– Signs of overloading and improper use
– Orderly condition of the protective covers
– Safety impairing soiling and corrosion
– Unblocked cooling vents
– Existence of necessary air filters
– Leak tightness, pressure relief valve
– Legibility of safety-related inscriptions
– Fuse links in accordance with manufacturer’s specifications
Externally visible defects, which could lead to a mechanical or fire
hazard should be repaired immediately.
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Operating manual for the TG uni 1 appliance tester
Explanation of terminology
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9. Conducting tests in accordance with DIN VDE 0701 and
DIN VDE 0702:
Definition of standards
The sequence of tests is specified in the standard:
9.1 Visual inspection
The test objects are inspected for externally visible defects.
9.2 Measuring the protective conductor resistance
(with devices of protection class I)
The limit value is:
0.3 ΩΩ
ΩΩ
Ωfor devices with connecting cables up to 5 m,
plus 0.1 Ωfor every 7.5 m, but a mximum of 1.0 Ω.
9.3 Measuring insulation resistance
The limit value is:
1 MΩΩ
ΩΩ
Ωfor devices of protection class I
2 MΩΩ
ΩΩ
Ωffor devices of protection class II 1)
0.25 MΩΩ
ΩΩ
Ωfor devices of protection class III
0.3 MΩΩ
ΩΩ
Ωfor devices of protection class I
with switched-on heating elements 2)
1) Alsoappliesfor touchableconductiveparts oftestobjectsin
protectionclassI thatarenot connectedtotheprotectiveconductor.
2) Ifthe required insulationresistance is not achievedin the case of testobjects in
protection class I with heatingelements with a total capacity ≥3.5kW, the test object
isneverthelessratedasfaultless if theprotectiveconductorcurrentdoes notexceed
the limit values.
Measuringprinciplecircuit
protectiveconductorresistancePCI,DiagramM1
Tester
Test object
Test line
Measuringprinciplecircuit
InsulationresistancePCI,DiagramM2 PCIIandIII,DiagramM3
Tester
Test
object
Test line
If the insulation measurement is technically impossible, then a
protective conductor current measurement (direct or differential
current method) must be carried out on test objects in PC I and
a touch current measurement on test objects in PC II.
17
Operating manual for the TG uni 1 appliance tester
Conducting tests in accordance with VDE 0701 and 0702 - definition of standards
´Probe´
socket Test socket
Test line
Test socket Test socket
´Probe´
socket ´Probe´
socket
☞

9.4a Measuring the protective conductor current
(with devices of protection class I)
The limit value is 3.5 mA.
In the case of test objects with heating elements with a total capacity
greater than 3.5 kW, the protective conductor current may not be
greater than 1 mA/kW heat output. The protective conductor current can
either be measured directly with the substitute leakage current method
or with the differential current method.
Protectiveconductorcurrent–differentialcurrentmethodPCI,DiagramM6
Measuringprinciplecircuits
Protectiveconductorcurrent–substituteleakagecurrentmethodPCI,DiagramM4a
Tester
Test object
Protectiveconductorcurrent-directmeasurementPCI,DiagramM5
Tester
Test object
Caution! The test object is supplied with mains voltage
during the test.
Tester
Test object
18
Operating manual for the TG uni 1 appliance tester
Conducting tests in accordance with VDE 0701 and 0702 - definition of standards
Test socket
Test socket
Test socket
Insulatedinstallation
In case of test objects in PC I with touchable conductive parts that
are not connected to the protective conductor, an additional touch
current measurement must be carried out in line with PC II
(see Diagram 1 on Page 20)
☞

9.4b Measuring touch current
(with devices of protection class II)
The limit value is 0.5 mA
Thetouchcurrentcaneitherbemeasureddirectlywiththesubstitute
leakagecurrentmethodorwiththedifferentialcurrentmethod.This
measurementmustalso becarriedout ondevices ofprotectionclass Iwith
touchableconductiveparts.
Measuringprinciplecircuits
Touchcurrent–substituteleakagecurrentmethodPCII,DiagramM4b
Caution! The test object is supplied with mains voltage
during the test.
Tester
Test line
Test
object
19
Operating manual for the TG uni 1 appliance tester
Conducting tests in accordance with VDE 0701 and 0702 - definition of standards
Test socket
´Probe´
socket
9.5 Inspection the inscriptions
Safety-related inscriptions must be controlled and, where necessary,
renewed or supplemented in suitable form.
9.6 Function test (only required for DIN VDE 0701)
After completion of the electrical test, a function test shall be carried out on
the test object. A partial test can be sufficient.
9.7 Documentation
Once a test is passed, it should be documented in suitable form. If a test
object proves to be unsafe, this should be clearly indicated on the device
and the operator informed in writing. Recording the measured values and
the changes is recommended.
Touchcurrent:
DirectmeasurementPCI,DiagramM8b DirectmeasurementPCII,DiagramM8a
Test
object
Test line
Tester
Test
object
Test line
Tester
Measurementofalltouchableconductivepartsofthetest
objectthatarenotconnectedtotheprotectiveconductor Insulatedinstallation
Test socket
Socket
´Probe´
Test socket
Socket
´Probe´
Insulated installatio

20
Operating manual for the TG uni 1 appliance tester
Test procedure in accordance with VDE 0701 and 0702
9.8 Diagram 1
Test procedure for devices of portection class I
Visual Inspection
Test object with conductive
parts that are not connected
to the protective connector
Is measuring the insulation
resistance applicable?
Testing the protective
conductor resistance
Measuring the
insulation resistance
Can the test object be
insulated from earth? Can the test object be
insulated from earth?
As with ‘No’, but additional
measurements for these parts
in according with the test
procedure diagram for
protection class II
Yes
Measuring the
protective conductor
current, differential
current method
Measuring the
protective conductor
current, direct
measurement
Measuring the
protective conductor
current, substitute
leakage current
method
Measuring the
protective conductor
current, differential
current method
Measuring the
protective conductor
current, substitute
leakage current
method
Measuring the
protective conductor
current, differential
current method
Measuring the
protective conductor
current, direct
measurement
Measuring the
protective conductor
current, differential
current method
End
Test log, test report
(documentation)
Function test and
inspection of
inscriptions
Function test, optional with VDE 0702, Fig.66
Fig.26 Fig.27/28
Diagram M6 Diagram M5 Diagram M4a Diagram M4a
Diagram M6 Diagram M6 Diagram M5 Diagram M6
Yes No
Fig.5Fig.5
No
Yes No
Fig.14
Diagram M1
No Yes
Fig.15