Operation Manual

MI 3310 / MI 3310A SigmaGT Instrument description
14
Right side connector panel
18 Current clamp adapter input sockets
Warnings!
 Do not connect any voltage source on this input. It is intended only for
connection of current clamp with current output. Maximum input current
is 30 mA!
 Green socket is connected to the functional earth of the system and is
intended for connection with shield of current clamp only.
19 USB connector
20 Barcode reader connector
21 PC / PRINTER connector
22 Checkbox input sockets (optional)
Warning!
 Do not connect any voltage source on these inputs. They are intended
only for connection to the test instrument as described in this manual
for the purpose of checkbox test.
2.3 Safety pre-tests
Before performing a measurement, the instrument performs a series of pre-tests to
ensure safety and to prevent any damage. These safety pre-tests are checking for:
- Any external voltage against earth on mains test socket,
- Excessively high leakage current,
- Excessively high touch leakage current,
- Short circuit or too low resistance between L and N of tested device,
- Correct input mains voltage,
- Input PE connection.
If pre-tests fail, an appropriate warning message will be displayed.
The warnings and measures are described in chapter 2.4 Warnings, messages and
symbols.