Gossen MetraWatt SECULIFE ST PRO, Manual, Page: 7 / 114

GMC-I Messtechnik GmbH 7
2 Safety Features and Precautions
The test instrument fulfills all requirements of applicable EU direc-
tives and national regulations. We confirm this with the CE mark.
The relevant declaration of conformity can be obtained from
GMC-I Messtechnik GmbH.
The test instruments are manufactured and tested in accordance
with the following safety regulations: IEC 61010-1 / DIN EN
61010-1 / VDE 0411-1, DIN EN 61557-16/VDE 0413-16.
Safety of the operator, as well as that of the test instrument and
the device under test, is only assured when it’s used for its
intended purpose.
Read the operating instructions carefully and completely before placing your
test instrument into service. Follow all instructions contained therein. Make
sure that the operating instructions are available to all users of the instru-
ment.
Tests may only be performed by a qualified electrician, or under the
supervision and direction of a qualified electrician.The user must be
instructed by a qualified electrician concerning performance and eval-
uation of the test.
Suitable personal safety equipment is required.
If you use active or passive body assistance, please consult with
your physician or the manufacturer of the body assistance device.
Note
Manufacturers and importers of medical electrical equipment
must provide documentation for the performance of mainte-
nance by trained personnel.
Observe the following safety precautions:
• The instrument may only be connected to TN, TT or IT electrical sys-
tems with a maximum of 240 V which comply with applicable safety
regulations (e.g. IEC 60346, VDE 0100) and are protected with a fuse
or circuit breaker with a maximum rating of 16 A.
• Measurements within electrical systems are prohibited.
• Be prepared for the occurrence of unexpected voltages at devices
under test (for example, capacitors can be dangerously charged).
• Make certain that the measurement cables are in flawless condi-
tion, e.g. no damage to insulation, no cracks in cables or plugs
etc.
• When using a test probe with coil cord (SK2W):
grip the tip of the test probe firmly, for example if it has been
inserted into a jack socket. Tensioning at the coil cord may
otherwise cause the test probe to snap back resulting in pos-
sible injury.
• Measurement of insulation resistance and equivalent leakage current
(alternative leakage current measuring method)
Testing is conducted with up to 500 V. Current limiting is uti-
lized (I < 3.5 mA), but if terminals L or N at the test socket or
the test probe are touched, electrical shock may occur which
could result in consequential accidents.
• Leakage current measurement while connected to line voltage
It’s absolutely essential to assure that the device under test is
operated with line voltage during performance of the leakage
current measurement. Exposed conductive parts may con-
duct dangerous touch voltage during testing, and may not
under any circumstances be touched. (Mains power is discon-
nected if leakage current exceeds approx. 10 mA.)
Attention!
!
The function test may only be performed after the DUT has
successfully passed the safety test!
• Probe test probe connection P1
Test the probe after completing each test (see also section
10.2.2).
Attention!
!
If the fuse at test probe P1 is defective after testing has
been started, all subsequent measurements conducted
using this measuring path will be incorrectly evaluated as
good!
• Fuse replacement
The fuses may only be replaced when the instrument is volt-
age-free, i.e. the instrument must be disconnected from
mains supply power and may not be connected to a measur-
ing circuit. The fuse type must comply with the specifications
in the technical data or the labeling on the instrument.
Connecting Line Voltage
Connecting line voltage to the test socket at the test instrument
and performance of a function test are only permissible if the DUT
has already passed all
safety test steps ! Depending on the DUT’s
protection class, this means that visual inspection, as well as
measurement of protective conductor resistance and insulation
resistance, must have been passed.
Do not start measurements at your test instrument unless the test
instrument and the DUT are in plain view. Do not connect line
voltage to the test socket of your test instrument before the sur-
rounding area has been secured. This applies to individual mea-
surements as well as to test sequences, and in particular to
remote operation via the remote control interface.
Switching Power Consumers – Procedure
Be absolutely sure to adhere to the sequence specified below
when switching the live device under test. This prevents excessive
wear of the mains relays at the test instrument.
Before measurement:
1 Device under test
:
Turn the DUT off via its own switch.
2 Test instrument : Switch line voltage to the test socket.
3 Device under test
:
Turn the DUT on via its own switch.
After measurement:
4 Device under test: Turn the DUT off via its own switch.
5 Test instrument : Deactivate line voltage to the test socket.
Switching Loads – Maximum Starting Current
The test instrument permits active testing of devices with a nomi-
nal current (load current) of up to 16 A.
The test socket on the respective test instrument is equipped with
16 A fuses to this end, and the switching capacity of the internal
relays is also 16 A. Starting current of up to 30 A is permissible.
Attention!
!
Despite extensive protective measures targeted at pre-
venting overloading, the relay contacts may be welded
together if
starting current exceeds 30 A . The following error
message appears in this case:
“
L(N) test socket fuse defective ”.
➭
Check both of the mains connection’s fuse links. If they’re de-
fective replace them with new ones.
If the error message described above still appears, it must be
assumed that the relay is defective. If this is the case, the test instru-
ment must be sent to our service department for repair (see section
15 for address).
Safer Testing with Test Adapter
In the case of test objects for which a starting current of greater
than 30 A can be expected, we urgently recommend the use of a
test adapter for larger starting currents:
for example test adapters from the AT3 series
(AT3-IIIE, AT3-IIS, AT3-IIS32, AT16DI or AT32DI).
Alternative: Passive Test
If necessary on the basis of the hazard assessment, testing can
be conducted as a passive test (equivalent leakage current
method), i.e. without switching line voltage to the test socket.