Gossen MetraWatt SECULIFE ST PRO, Manual, Page: 25 / 114

GMC-I Messtechnik GmbH 25
6 Connecting the Device Under Test
➭
Connect the DUT in accordance with the schematic diagrams
included in the online help function.
Connection of the DUT to the test instrument depends on:
• The type of DUT:
For direct connection to the test socket (TS)
Devices with single-phase connection
and extension cords via the
EL1 adapter
(in which case the EL1 is connected to probe sockets P1)
For permanent connection (to the mains)
by contacting the housing with the probe
(for the
measurement of protective conductor resistance or
with the direct measuring method for the touch current
measurement)
Measurement of protective conductor current with a current clamp
(only possible with feature I01)
For connection via adapter
– With single-phase extension cords via the EL1 adapter
(in which case the EL1 is connected to probe sockets P1)
– With single and 3-phase extension cords via the VL2E adapter to
the test socket
– Devices with 5-pole, 16 A CEE plug
via the AT16-DI differential current adapter to the test socket
– Devices with 5-pole, 32 A CEE plug
via the AT32-DI differential current adapter to the test socket
• DUT protection class (PC I, PC II or PC III) or any combinations
of protection categories
Note
The DUT must be switched on for all tests. Switches,
relays, temperature regulators etc. must all be taken into
consideration.
As a default setting, the program sequence assumes that the plug
from the DUT has been connected to the test socket.
6.1 Residual Current Monitoring
For your safety, the test instrument is equipped with continuous
residual current monitoring. If residual current exceeds a specified
limit value, all measuring processes are stopped, and if line volt-
age is fed through the test socket it’s disconnected. This limit
value can be set to one of two levels in the
SETUP switch position:
Setup 1/3 > All Measurements > Residual Current Protection >
10 mA /30 mA
6.2 Reference Voltage L-PE and Alternative Test Sequence
Specifying Reference Voltage L-PE
Reference (line) voltage is the voltage to which the measured val-
ues for leakage current have been standardized.
It’s used in the case of leakage current for mathematical adapta-
tion of measured current values to the specified voltage.
Measurements with line voltage at the test socket: The setting value
has no influence on the voltage with which the test object is sup-
plied via the test instrument’s test socket.
Leakage current measurements with “Alternative” method: The set-
point value of the synthetic test voltage is derived from the value
specified here.
Note
The displayed measured values for leakage current are
standardized to an adjustable reference value (typically
230 V) in order to permit reproducible measurement of
leakage current even with fluctuating mains supply volt-
age.
Reference voltage can be adjusted in Setup:
Setup 1/3 > All Measurements >
Ref. Voltage L-PE
Specifying an Alternative Test Frequency
Selectable frequency setpoint value for synthetic test voltage for
all leakage current measurements of measurement type “Alterna-
tive”, affecting the following measurements and/or rotary selector
switch positions:
– Single measurements (rotary switch level: green)
– Measurements included in predefined default test sequences
– Measurements included in user-defined test sequences (only
with database extension, feature KB01, “Z853R – SECUTEST
DB+”)
The Alt. Test Freq. parameter can be set in Setup:
Setup 1/3 > All Measurements > Alt. Test Freq.
6.3 Manually Specifying the Connection Type for Single
Measurements
In the case of single measurements the test instrument is unable
to detect the respective
connection type (e.g. test socket or perma-
nent connection (voltage measuring inputs)). The connection type
must be specified manually.
➭
Select parameter settings .
➭
After selecting the measurement type parameter, a list of possi-
ble connection types is displayed.
➭
Select a connection type .
Once a connection type has been selected, it remains active for all
following tests until it’s changed again.
6.4 Manually Selecting a Connection Type / Protection Class
for Automatic Test Sequences
If the test instrument is unable to detect the respective connection
type or protection class, the suggested connection type must be
examined and the connection type or protection class must be
specified manually if necessary.
➭
Press the Sel key shown at the right in order to display
the Classific. parameters .
➭
After selecting the protection class or connection type pa-
rameter, a list of possible settings is displayed.
➭
Select the respective parameter.
➭
Acknowledge the Class. Param. (classification parameters)
once again.
The connection type appears at the middle of the header.
The symbol for the respective protection class appears to the
right of the connection type.
Once a connection type or a protection class has been selected, it
remains active for all following tests until it’s changed again.