5.2 Installation type B: hanging the pressure probe
See also Fig. 1.
■
Determine the minimum and maximum water level at your station (e.g. staff
gauge, contact gauge). Use both values to specify the probe position. The fol-
lowing conditions must be fulfilled:
– position the probe below the minimum water level if possible;
– difference between max. water level and position of the probe < measuring
range of the probe.
■
Fix the cable suspension (accessory) at a suitably sized attachment point.
■
Carefully lower the pressure probe on the pressure probe cable to the specified
depth. There are markings on the cable every 0.25 m to assist orientation.
■
Lay the pressure probe cable in the opened clamping jaws of the cable suspen-
stion as shown in Figure 1 and secure the pressure probe cable by pushing the
clamping jaws together. The mechanical longitudinal stability required is pro-
vided by the Kevlar-strain relief inside the pressure probe cable.
Please note:
maximum hanging depth: 150 m!
(greater depths on request).
Note:
The fine setting of the probe position is carried out, for example, by entering
a reference or offset value (see Chapter 6, "Configuring/testing the OTT PLS 500") or
using a scaling function of the data logger connected. Therefore, in many applica-
tions it is sufficient to position the pressure probe approximately.
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