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Gossen Metrawatt GmbH
Measurements with test probe 1 to test probe 2 (P1 – P2) are
electrically isolated from the mains. There’s no voltage at the test
socket.
Attention!
!
Please note that during insulation measurement the
maximum test voltage of 500 V may be applied between
the probes.
13.8
Connection Prompts
If a single measurement (green rotary switch positions) or a spe-
cific (integrated) automatic test sequence (orange rotary switch
positions) is started, checking is conducted to determine whether
or not all of the probes and measurement cables required to this
end are connected (depending on the configuration level of your
test instrument). If this isn’t the case, you’re prompted to connect
probes, measurement cables or the test adapter to the test
instrument.
Note
Checking is only performed to determine whether or not
the corresponding sockets are occupied.
In any case, make sure that appropriate accessories for
the selected measurement/connection type are con-
nected.
A list of possible DUT connections depending on type of mea-
surement is included in section 13.1.
13.9
Connection Tests Conducted by the Test Instrument
The following measurements are performed automatically when
the DUT is connected to the test instrument.
•
Detection of Probes / Measurement Cables
During individual measurements / automatic test sequences,
checking is conducted to determine whether or not the mea-
suring sockets required for the measurement/sequence are
occupied.
•
DUT Connection Detection
(only with country-specific variant *)
With the rotary switch in the A1-A9 position, the “Test Socket”
connection type is selected automatically (if correspondingly
configured), if a mains plug is detected in the test socket.
•
Protection Class Detection
(only with country specific variant *):
With the rotary switch in the A1-A9 position, protection class I
or II is selected (if correspondingly configured), depending on
the detected type of mains plug.
•
Short-Circuit Test
Before switching mains voltage to the device under test: test
for short-circuiting between L and N or L/N and PE – if appli-
cable additionally as an “inspection test step” in test
sequences.
•
On Test
: test to determine whether the DUT is switched on or off.
•
Switchable Control:
If high internal DUT resistance is detected (R <
500
), mains power is switched on automatically; if low internal
DUT resistance is detected, a popup window appears prompting
the user to switch off the DUT at its mains switch before mains
power is switched on.
Automatic Recognition of States
when Connecting DUTs and Probes
1
Applies to
M7050
with
feature B00 and B09
2
Firmware version 3.2.0 and lower: 12 mA
Attention!
!
* Safety Shutdown
As of 10 mA of differential current (can also be set to
30 mA), automatic shutdown ensues within 500 ms.
This automatic shutdown does not take place during
leakage current measurement with clamp meter or
adapter!
Test Function
Condition
Short-circuit testLie-in
Short-circuit / DUT starting current
R
2.5
No short-circuit (AC test)
R > 2.5
Open-circuit voltage U
0
4.3 V, short-circuit current I
K
< 250 mA
Short-circuit testLN–PE
Short-circuit
R
2 k
No short-circuit (AC test)
R > 2 k
Open-circuit voltage U
0
230 V AC, short-circuit current I
K
< 1.5 mA
On test
On (DUT passive)
R < 250 k
Off (DUT active)
R > 300 k
Open-circuit voltage U
0
230 V AC, short-circuit current I
K
< 1.5 mA
Switchable control
Mains power switched on automatically
R >500
Popup (switch off DUT first) R < 500
Probe test
No probe
R > 2 M
Probe detected
R < 500 k
Protection class detection
(only with country specific variant
1
)
Protective conductor found: PC I
R < 1
No protective conductor: PC II
R > 10
Safety shutdown
Triggered at following residual current value (selectable)
> 10 mA /
> 30 mA
Triggered at following probe current values (electronic fuse)
During leakage current measurement
> 30 mA
2
During protective conductor resistance measurement
> 250 mA
Connection test
(only with country specific variant
1
)
Checks whether the DUT is connected to the test socket.
DUT power cable found
R < 1
No DUT power cable
R > 10
Insulation test
DUT set up in a well-insulated fashion
R
500 k
DUT set up in a poorly insulated fashion
R < 500 k
PE mains – PE socket: Open-circuit voltage U
0
500 V DC, I
K
< 2 mA
Overcurrent protection
Shutdown in the event of a continuous flow of current via the test socket at:
Our SECUTEST ST BASE(10)/PRO and SECULIFE ST BASE(25) test instru-
ments permit active testing of DUTs with a nominal 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.
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, e.g. a test adapter from the AT3 series.
I > 16.5 A
Summary of Contents for SECULIFE ST BASE 25
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