Vaisala HMP228 - Manual (Page 15)

HMP228
M210282en-A Operating Manual
9
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STEP 3: push the probe head through the ball valve assembly into the
process. Note that the sensor head must be pushed so deep that the filter is
completely inside the process flow.
FILTER
VALVE OPEN
VALVE CLOSED
MANUAL PRESS TOOL
Figure 2.2.3.4 Installing the probe through the ball valve
assembly: step 3
2.2.4 Mounting the probe directly in the process pipe
When the probe is installed directly in a process pipe, note that a closing valve
is needed on both sides of the installed probe so that the sensor head can be
removed from the process for calibration and maintenance.