HT instruments SPEED418 - Manual (Page 22)

400 Series
EN - 21
6.3. M
:
MEASUREMENT OF THE INSULATION RESISTANCE
This function is performed according to standard IEC/EN61557-2 and allows measuring
the insulation resistance between the active conductors and between each active
conductor and the earth. The following operating modes are available:
 MAN in this mode, the test continues until the GO/STOP key on the instrument (or the
START
key on the remote probe) is held. If the GO/STOP key (or the START
key of the remote probe) is pressed and immediately released, the test has a
duration of 2 seconds. Recommended mode for insulation test
 TMR in this mode, the operator may set a measuring time long enough to be able to
move the test lead onto the conductors being tested, while the instrument is
performing the test. For the whole measurement duration, the instrument will
give a short acoustic signal every 2 seconds (in order to have a stable reading
of resistance, it is recommended to wait at least two acoustic signals before
moving the test lead to another conductor). While measuring, if insulation
resistance reaches a lower value than the set limit, the instrument will give a
continuous acoustic signal. To stop the test, press the GO/STOP key on the
instrument or the START key on the remote probe again.
Fig. 8: Instrument connection by means of single cables and remote probe
Fig. 9: Instrument connection through shuko cable
1. Press the MENU key, move the cursor to M 
in the main menu by means of the arrow keys
(,) and confirm with ENTER. Subsequently
the instrument displays a screen similar to the
one reported here to the side.
M 
- - - M

- - - - V - - - s
MAN 500V 0.50M
Func VNom Lim