MI 3321 MultiservicerXA
Instrument description
13
intended for connection with shield of leakage current clamps only
(e.g. A 1283).
9 Function keys intended for displayed defined options.
10 ESCAPE key.
11 START key.
12 STOP key.
13 Alpha-numeric keyboard.
14 Cursor keys and ENTER key.
15 Test socket (230 V).
Warning!
Line voltage is present on the test socket during the measurement.
Maximum output current is 16 A. Test only devices with maximum rated
supply current not higher than 16 A!
Note:
For devices incorporating high reactive loading, e.g. motor with rated power
>1.5 kW, it is recommended to start measurement first and to turn on the
tested device later.
16 LN and PE sockets for testing the insulation resistance and substitute leakage
current of fixed installed DUTs.
Warning!
These sockets are intended only for the connection to de-energized
devices.
17 TP1 test socket for testing discharge time and electrical installation parameters
like line / loop impedances, voltage, residual current devices, 3-phase
sequence.
18 C2 connector, used as output for continuity tests (in machine, switchboard and
All operating modes).
19 Light indicator of active HV outputs
20 HV test connectors output.
Warning!
A high and dangerous voltage of up to 2200 V a.c. nominal is applied at
this output during the measurement!
21 Test probe (S/C1) connector, used as output for earth bond/ continuity tests and
probe input for class 2 equipment tests (insulation resistance-S, substitute
leakage-S and touch leakage currents ).
22 Cover for preventing simultaneous access of two connectors IEC (23) and S/C1
(21)
23 IEC appliance connector for testing supply cords.
Warning!
The connector input is for test purpose only; do not connect it to the
mains supply!
2.2 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,
