Yokogawa 212 Heat Calculator - Manual (Page 69)

7.5 WIRING PRACTICES
Three of the terminals are marked and must be connected to a good earth,
using a multi-stranded, braided wire.
It is good wiring practice to use shielded cables for all connections to the Model
212. Care must be taken to separate signal cables from power cables and relay
cables, so as to minimise interference.
Overall shields should be connected at the instrument side only and to the
terminals marked . These connections should be as short as possible.
In order to comply with the requirements for Electromagnetic Compatibility as
per EMC Directive 89/336/EEC of the Council of the European Community, this
wiring practice is mandatory.
Although it is possible to connect shields to the (-) volt supply terminal (51 -),
this practice is not in accordance with the EMC Directive.
Installation 67