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Removing the probe
Hold the probe firmly so that it is not suddenly ejected when the lock nut is released. Make sure not to
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bend and damage the probe cable.
Loosen the lock nut slowly with a spanner (spanner size 24) until the probe is pushed out by the system
■
pressure. Do not loosen the lock nut completely, but only until the probe slides out by itself. If the system
is almost pressureless, pull out the sensor slightly.
After the probe has been pushed out of the process up to the stop, close the ball valve.
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Remove the probe from the ball valve.
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Observe the correct positioning of the sealing element 1 before reinstalling the probe.
Replacement of the sealing element
In case of repeated installations and removals the sealing element 1 might be damaged. It can be replaced
by the user.
4.3
Sampling Cell with Shut-off Function
Sampling cell with shut-off function, PN40, DN25 HA050109
The sampling cell with shut-off function is designed for placing a MOP301 in a bypass oil sampling or
as well directly into the process. In both cases, the sampling cell could be moved into the oil flow or in
service position by interupting the oil flow. When closing the G 1/2" ISO sensor port with a sealing plug,
the sampling cell with shut-off function works like a ball valve. Using the sampling cell with shut-off function
works like the method described in chapter 4.1 Installation of the Probe Directly in the Process, however
without the need of stop valves in the upstream and downstream of the measurement point.
Technical data of the sampling cell
Pipe thread:
Senor port thread:
Operating pressure: 40 bar (at max. 80 °C) / 580 psi (at max. 176 °F)
Temperature range: -20...180 °C (-4...356 °F)
Wettet parts:
1) Please note that specifications of probe and sampling cell may restrict each other in terms of temperature and pressure
application range.
Replace the metal sealing ring (see Fig. 6) by a new one every time before re-installing the probe.The
temperature during probe installation may deviate by max. ±40 °C
during normal operation.
Probe installation steps
Shut off the valve
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Place the sensor probe into the probe insert and adjust the immersion depth
■
■
Tighten the lock nut with a torque of 30 Nm
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Open the valve
Strictly observe the tightening torque. A torque lower than 30 Nm results in a smaller retention force of
the clamping sleeve. This leads the risk of sudden expulsion of the sensing probe due to the pressure.
A torque higher than 30 Nm may lead to permanent deformation of the clamping sleeve and the sensing
probe. This would make the removal and re-installation of the probe difficult or even impossible.
By removing the probe, close first the shut-off valve. Before openening the valve, ensure that the sensor
port contains a sensor or is closed by a sealing plug.
10
1)
Rp / Whitworth thread according to EN 10226 (old DIN 2999)
G 1/2" ISO
Stainless steel 1.4408 & PTFE
from the regular temperature
(±72 °F)
User Manual MOP301 Digital Moisture in Oil Immersion Probe
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