PFT levelling pin / Safety, overview, operation and service
Operation
4.3.2
Setting measuring scale
4
3
1
2
2
Figure 5: Opening shut-off valves
1. Remove the probe from the protective tube.
2. Move the measuring scale on the top part of the carrier rod to
the upper edge of the guide part of the carrier rod with the yellow
marking ring (1). Precisely 100 cm are then set from the lower edge
of the carrier rod extension to 0 = 100 on the measuring scale.
3. Open the two shut-off valves (2) on the liquid tank of the basic
device.
4. Open the self-closing valve (3) on the probe by pressing in the red
lever and hold it with the ring (4).
5. Lift the probe, then place the probe rod vertically close to the basic
device on the floor level to be measured, the liquid level will level
off.
6. Read off the liquid level, the self-closing valve (3) must still be
open.
7. Close the self-closing valve (3).
8. Once these preparations are complete, the levelling pin is ready for
measuring.
NOTE
The measuring hose must not be moved or pressed while
the measuring scale is being read, as this will cause the
measuring column to change.
4.3.3
Adjustment check of the levelling pin
NOTE
Make sure an adjustment check is carried out several
times a day when working with the levelling pin, because
temperature differences can cause a change in the
volume of the measuring liquid. It is equally important that
the probe is vertical during the measuring process. Any
deviation from the perpendicular in excess of 3° will cause
erroneous measurements.
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