K-Patents PR-23 - Manual (Page 140)

132 PR-23 instruction manual
An intrinsically safe sensor has a different processor card and a different terminator
card than a standard sensor, other parts are as in standard sensor (see earlier in this
chapter for full parts list).
PR-10300-Ex
terminator card
PR-10101-Ex
processor card
Figure 9.36 Intrinsically safe parts
Warning! Do not replace any part of an intrinsically safe sensor with a
standard sensor part.
Contains lightmetals
Ignition hazard!
Avoid impact!
Figure 9.37 Warning sticker
Important: If the sensor cover is made
of aluminium, the refractometer sensor
can cause ignition if it hits other metal
parts during the installation.
An alu-
minium sensor cover must have a sticker
warning about this possibility.
9.11.2 Intrinsically safe mounting
Choose the mounting location of the sensor, the isolator/barrier unit and the indicat-
ing transmitter so that they are protected from sudden impact and friction. If any of
the system parts is affected by a sudden impact, power it off immediately and have it
checked by trained K-Patents service personnel before it is used again.
The electrical connections for PR-23-...-IA are described in Figure 9.38. The electrical
connections for PR-23-...-IF are described in Figure 9.39.