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3.5
Mounting the measurement sensor
To mount the transmitter, select a location with
stable conditions, i.e. protected against direct
sunlight or rain. The measurement probe
should be fitted at a location where represent-
ative measured values are to be anticipated
for the process.
The measurement probe must be mounted
horizontally or vertically (downwards).
If possible, a drip tray should be placed into
position before every installation.
A temperature drop along the measurement
sensor should be avoided.
Mechanical ambient conditions
When installing the sensor, the mechanical influences of the installation site should be taken into
account. (e.g. vibrations, shock loads via startup processes, temperature fluctuations,...).
If the mechanical stability or seal on the probe cannot be ensured, additional mechanical
fastening or support should be included.
The probe cable and connection cable should be handled and laid in the hazard area so that no
static charges can arise (e.g. metal hose).
Filter caps
The following filter caps ensure sufficient protection against electrostatic discharges relating to
explosion group IIB, but are not permitted for use in EPL Ga IIC or Class I, Division 1, Group A,B:
• PTFE filter (order code E)
• PTFE filter on metal body (order code K)
• H2O2 filter (order code L)
The following filter caps are permitted for use in EPL Ga IIC or Class I, Division 1, Group A,B:
• Stainless steel sinter filter (order code D)
• Stainless steel lattice filter (order code I)
• Oil filter (order code M)
3.5.1 Mounting the clamping ring screw connection
The clamping ring screw connection can be used as Zone or Division bushing. To do this, the
screw connection is screwed into the isolating wall and must have a seal tightness of IP67.
Safety instructions for pressure-tight screw connection:
• The system must not be vented by releasing the union nuts.
• Do not assemble and tighten pipe screw connections if the system is under pressure.
• Always use the correct thread sealant on conical pipe threads.
• Never rotate the screw connection body. Instead, hold the screw connection body securely and
turn the union nut.
• Avoid unnecessary disassembly of unused pipe screw connections.
Wand /
Wall
r > 30mm
60% rH
17°C
16
Relative Humidity
45% rH
Temperature
21°C
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