HT instruments SPEED418 - Manual (Page 23)

400 Series
EN - 22
2.
Use the ,  keys to select the parameter to be modified, and the ,  keys
to modify the parameter value.
It is not necessary to confirm the selection with ENTER
.
Func The virtual Func key allows setting the measuring mode of the
instrument, which may be: MAN, TMR
VNom
The virtual VNom key allows setting the test voltage, which may
have the following values: 50V, 100V, 250V, 500V, 1000V
Lim
The virtual Lim key allows setting the minimum insulation limit,
which may have the following values: 0.05M
, 0.10M, 0.23M,
0.25M
, 0.50M, 1.00M, 100M
Temp Only in TMR measuring mode, the virtual Temp key allows setting
the test duration time that may range between 10 and 999 seconds
3. We suggest setting the value of the voltage supplied while measuring and the
minimum limit to consider the measure correct according to the prescriptions of the
reference standard (§ 14.2).
4. Insert the green and black connectors of the single cables into the corresponding input
leads E and P of the instrument. Apply the relevant alligator clips to the free ends of
the cables. It is also possible to use the remote probe by inserting its multipolar
connector into the input lead P.
5. Should the length of the cables provided be insufficient for the measurement to be
performed, extend the green cable.
CAUTION
Before connecting the test leads, make sure that there is no voltage at the ends
of the conductors to be tested. Disconnect any cable not strictly involved in
measurement and moreover check that no cable is connected to In1 input.
6. Connect the test leads to the ends of the conductors to be tested as in Fig. 8 and Fig. 9.
7.
Press the GO/STOP key on the instrument or the START key on remote
probe. The instrument will start the measurement.
CAUTION
If message “Measuring…” appears on the display, the instrument is
performing measurement. During this whole stage, do not disconnect the
test leads of the instrument from the conductors under test, as the circuit being
tested could remain charged with a dangerous voltage due to the stray
capacitances of the system
8. Regardless of the operating mode selected, the instrument, at the end of each test,
applies a resistance to the output leads to discharge the stray capacitances in the
circuit