Options and accessories
87
The optional version of the UNIMET® 1100ST with 25 A PE conductor current has the
following features:
●
A regulated AC source supplies a sinusoidal current of 25 A (± 10 %) at a resistance to be
measured of 0
Ω
to 0.3
Ω
. If the electrical resistance of the DUT's PE conductor connection
exceeds 0.3
Ω
, the current will drop as the resistance increases.
●
The 25 A test is carried out in the following menu for complete test sequences in accordance
with IEC 60601-1 and UL 60601-1:
– classification,
– type catalogue and
– device catalogue.
●
25 A testing is
not
active:
– during single testing;
– during test sequences compiled in the UNIMET® 1100ST test step editor;
– during test sequences compiled from single test steps in a computer program
●
During testing, the test current is applied to the connected DUT for 5 seconds.
●
The heat generated by the PE conductor current in the UNIMET® 1100ST is dissipated via the
ventilation apertures in the base and on the right-hand side wall of the UNIMET® 1100ST.
Suitable apertures are also located in the UNIMET® 1100ST carrying bag. You must ensure that
these apertures remain unobstructed at all times.
●
Temperature monitoring prevents the UNIMET® 1100ST from overheating. If PE conductor
testing is repeated several times without a break, the UNIMET® 1100ST will switch to a cooling-
down phase lasting approx. 1 minute after the fourth test at the earliest. Test practice is such
that when leakage currents are being tested and the results of these tests recorded, the
cooling-down breaks are long enough to ensure that the temperature monitoring function on
the UNIMET® 1100ST is activated only occasionally.
The 25 A option does not affect the operation of the UNIMET® 1100ST. If test results are
printed out via the UNIMET® 1100ST menu, the value of the test current will appear in the
protocol.
8.3 Printer
A portable ink jet printer for immediate printout of test protocols can be supplied as an
option. The printer is an integral feature of the optional carrying bag for the UNIMET®
1100ST. The printer is supplied set up for use with UNIMET® 1100ST.
Please see the printer manual for more information.
If you are using a printer not supplied by BENTRON
®
, please note:
●
Only connect printers that are not earthed. If you are using an earthed printer, the Centronics
Printers not supplied by BENTRON® must be disconnected from the UNIMET®
1100ST during testing!
These printers can distort measurements and create earth loops that can
damage the UNIMET® 1100ST and the DUT.
Summary of Contents for UNIMET 1000ST
Page 50: ...Operation and setting 50 TGH1256en 10 2005...
Page 80: ...PC compatible functions of the UNIMET 1100ST 80 TGH1256en 10 2005...
Page 82: ...Maintenance and calibration 82 TGH1256en 10 2005...
Page 90: ...Options and accessories 90 TGH1256en 10 2005...
Page 96: ...Data 96 TGH1256en 10 2005...
Page 99: ......