USER'S GUIDE____________________________________________________________________
46 __________________________________________________________________ M210704EN-F
NOTE
The probe can be installed in the process through the ball valve assembly
provided that the process pressure is less than 10 bars. This way, the
process does not have to be shut down when installing or removing the
probe. However, if the process is shut down before removing the probe,
the process pressure can be max. 20 bars.
NOTE
When measuring temperature dependent quantities make sure that the
temperature at the measurement point is equal to that of the process,
otherwise the moisture reading may be incorrect.
Follow the steps below to install the DMT348 probe through a ball valve
assembly. After the installation, the probe should be sitting in the process
chamber or pipeline as shown in Figure 30 on page 45.
1.
Shut down the process if the process pressure is more than 10 bars.
If the pressure is lower there is no need to shut down the process.
2.
Close the ball valve.
3.
Seal the threads on the fitting body; refer to Figure 28 on page 42.
4.
Attach the fitting body to the ball valve and tighten it.
5.
Slide the clasp nut of the probe toward the filter, as far as it will go.
6.
Insert the probe to the fitting body, and manually tighten the clasp
nut to the fitting body.
7.
Open the ball valve.
8.
Push the probe through the ball valve assembly into the process. If
the pressure is high, use the pressing handle that is provided with
the probe. If you push the probe hard without using the handle, you
may damage the cable.
Note that the probe must be pushed so deep that the filter is
completely inside the process flow.
9.
Mark the fitting screw and the clasp nut.
10. Tighten the clasp nut with a fork spanner a further 50 ... 60º
(ca. 1/6 turn). If you have a suitable torque spanner, tighten the nut
to max 45 ± 5 Nm (33 ± 4 ft-lbs). Refer to Figure 29 on page 43.
NOTE
Take care not to tighten the clasp nut more than 60° to avoid difficulties
when opening it.
If you wish to remove the probe from the process, note that you have to
pull the probe out far enough. You cannot close the valve if the groove
on the probe body is not visible.
