Appliance Testers
Useful Information concerning Appliance Testing complying to DIN VDE 0701/ 0702 and BGV A2 (VBG 4)
UNITEST 0701/0702 Multitesters have been developed for testing portable electrical appliances. DIN VDE 0701/0702 stipulates the requirements for:
• earth bond resistance testing,
• insulation resistance measurement,
• substitute leakage current measurement,
• leakage current measurement,
Part 1 – 240 of DIN VDE 0701 in addition contains limit values and special test requirements for different types of appliances.
BEHA instruments of course are constantly updated to comply with the latest valid directives.
The German accident prevention directive BGV A 2 (VBG 4) requires repetitive tests, in compliance with DIN VDE 0702, to be carried out at regular intervals. For this test, resistance of earth conductor, insulation resistance, and substitute leakage current of earth bonds, or the contact current must be verified.
The above tests should ensure that there is no danger at any time to the user during normal use of the electrical appliances. All tests can be carried out by using one instrument, the 0701/0702 Multitester.
Combi-Tester
The tests in compliance with DIN VDE 0701/0702 may also be carried out using our UNITEST Machinery Tester and UNITEST MACHINEmaster. These instruments allow the user to carry out measurements in compliance with EN 60204 /DIN VDE 0113 (see chapter entitled “Useful Information regarding EN60204 Test Instruments“) and measurements in compliance with DIN VDE 0701 /0702.
The UNITEST 0701/0702 Multitester is available in two versions:
Professional Version
The professional version is easy to operate and clearly laid out. Measurement function selection is carried out via a rotary switch. The measurement values are displayed on a digital display. In addition, LEDs indicate f the required limits are exceeded for each measurement (in compliance with DIN VDE).
PC Version
(German language only)
The PC version is particularly suited for users having to test many appliances. The test procedures can be carried out either semi-automatically, where the user only has to confirm the individual test steps, or fully automatically.
An RS-232 interface enables printer or PC connection.
Barcode reader
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A barcode reader can be connected to the RS-232 interface, enabling test codes or appliance numbers to be entered.
Software
(German language only)
An extensive software package for administration and recording of test values and appliance data is available for the PC multi-tester. All UUTs to be subjected to a test can be logged by means of the software. The individual UUT is assigned within the company to the respective department or to a certain UUT group. Various output reports enable direct print outs of UUT lists, the protocols, maturity lists, etc. The instrument is of particular interest to companies offering a repetition test in compliance with DIN VDE 0702 as service performance.
Example:
Prior to testing at the customer’s premises test data for the proposed UUT is entered nto the PC-Multitester.
The appliances are verified at the customer’s premises and the test results are entered into the PC-Multitester. The data is then transferred and data-base updated.
Description of Individual Tests:
Visual inspection in compliance
with DIN VDE 0701/0702
Prior to any electrical test a visual inspection must be carried out to detect obvious defects (mechanical damages, contamination, humidity effects).
Here, the casing and the casing parts sockets must be checked for undamaged condition.
Furthermore, when carrying out a duplicate test, the instrument must be checked for appropriate functioning at the respective test site.
Measurement of the protective earth resistance in compliance with DIN VDE 0701/0702
For instruments belonging to protection class I, the protective earth conductor resistance must be tested. The measurement is carried out starting from the mains connection point (protective contact of mains plug) for all touchable, metal UUT instrument parts which must be in contact with the protective earth conductor. The PE conductor must be tested applying a test current of minimum 200 mA.
Measurement of Insulation Resistance complying to DIN VDE 0701/0702
The measurement is carried out between all phase and neutral conductors to the touchable conductive parts of the appliance.
The UUT must be switched on to test all parts of the electrical circuit. For appliances with protection Class II, tests are made between all conductors and all touchable conductive parts.
Measurement of Substitute Leakage Current in compliance with DIN VDE 0701/0702
This measurement procedure determines the leakage current routed via the protective earth conductor or via a touchable part without applying mains voltage.
In compliance with DIN VDE 0701, this is an alternative measurement procedure to determine the protective earth current or contact current.
According to DIN VDE 0702, this is a substitute measurement for the insulation measurement. It can be used if instruments equipped with heating elements belonging to protection class I do not meet the requested insulation values.
Measurement of Protective Earth Conductor Current in compliance with DIN VDE 0701/0702
This is a part of the leakage current for a UUT routed back via the protective earth. The protective earth conductor current can be determined either via a direct current measurement within the PE or via the differential current measurement method. The measurement must be carried out for both mains plug positions.
In compliance with DIN VDE 0701:2000-09, the protective earth conductor measurement is a complementary measurement to determine the insulation capacity of instruments belonging to protection class I.
According to DIN VDE 0702, this measurement is a substitute for the insulation measurement for instruments belonging to protection class I, which cannot or must not be subjected to an insulation measurement.
Measurement of contact voltage in compliance with DIN VDE 0701/0702
This is a current measurement of touchable, conductible parts of a UUT towards ground, the measurement can be carried out either directly or via the differential current measurement method.
The contact current measurement is carried out for instruments belonging to protection class II with touchable, conductible parts or for instruments belonging to protection class I equipped with touchable, conductible parts not being connected with the PE. The measurement must be carried out for both mains plug positions.
In compliance with DIN VDE 0701:2000-09, the contact current measurement is an additional measurement to determine the insulation capacity for instruments belonging to protection class I and II with touchable metal parts.
According to DIN VDE 0702, this measurement is a substitute for the insulation measurement for instruments which cannot or must not be subjected to an insulation measurement.