HT instruments HT950N - Manual (Page 9)

HT950N
EN - 9
5.2.1. Power supply circuit
HT950N meter can be supplied with AC (50/60Hz frequency) or DC sources. If you use
DC supply please connect positive (+) and negative (-) contact at terminals 30 and 32
respectively, like shown on Fig. 4
Fig. 4: Power supply terminals of HT950N
WARNING
 Use a cable with section  1mm 2
for power supply the meter.
 Its necessary to insert a easy to reach voltage protection switch on/off before
HT950N to interrupt voltage.
 The EMC levels/immunity declared in chapter 7.2.2 are referred only
inserted standard filter on supply cord, like shown in Fig 5.
Fig. 5: connection of EMC filter on supply cord.
WARNING
As all safety protections of HT950N meter depend on refer S terminal (31), its
necessary to connect all Pt100 shields at this terminal.