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Re-mounting:
• Slide the measurement probe with clamping ring into the fitting as far as it goes.
• Tighten the nut finger-tight, then tighten by approx. a ¼ turn using a spanner.
3.5.2 Mounting Flange
The optional mounting flange (see datasheet accessories) may not be used as Zone or Division
bushing. When installed with the mounting flange, the hazard areas on the filter cap side and at the
cable outlet side must be of the same category.
3.5.3 Ball Valve and Sliding Fitting
The optional ball valve HA011403 (ATEX certified)
allows for the probe to be mounted or removed without
interrupting the process to be monitored.
Only ball valve approved for use in explosion hazard
areas are permitted.
The two metal sealing rings (see figure) shall be
replaced with new ones after each removal of the
probe.
MOUNTING THE PROBE:
The process temperature may not deviate from the
mounting temperature by more than ±40 °C (104 °F).
The maximum permitted process pressure during
mounting is 10 bar (145 psi).
• Mount the probe onto the ball valve with the ball
valve closed.
• Open the ball valve.
• Slide the probe through the ball valve into the pro-
cess to the desired immersion depth. For rather high process pressure a manual pressing tool might
be needed for sliding easily the probe into the process.
• For secure probe installation the closing nut shall be tightened with a torque of 30 Nm. If a torque
wrench is not available, turn first the closing nut by hand as tight as possible, then turn another
approx. 50° using a suitable open-ended spanner.
A lower tightening torque means lower clamping force of the clamp sleeve. Consequently there is a
risk for the probe being pushed out by the process pressure.
An excessive tightening torque may cause permanent deformation of the clamping sleeve and of the
probe. This makes the removal and re-mounting difficult or even impossible.
20
HA010201
HA010207
HA011403
Metal sealing ring
(as standard
with probe)
Extension
(not provided with an
NPT thread)
User Manual EE300Ex Humidity / Temperature Sensor
Metal sealing ring
(included with the ball
valve set as standard)
Internal diameter:
≥ 13.1 mm (0.51")
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