Series PC Manual V 1.0 - Rev. 3
– 03/01/01
DS Europe
12
7.2.
MOD. PCP (P = flanged well )
The probe (well) and the threaded union connected to it are previously installed in the
hydraulic cylinder or in the tank so that there is no need to disassemble them should the
transducer need servicing.
The waveguide (together with the measuring head) is inserted in the well and the head is
clamped to the hexagonal flange of the well union.
Assembly of PCP model is similar to PCS model (section. 7.1).
IMPORTANT: the waveguide must be always kept straight and any bending on the axis
exceeding 10 mm per metre will irreversibly damage the wave guide. This kind of damage
can be easily found out by DS Europe and is not covered by the warranty.
NOTE
: during installation or removal of a transducer equipped with threaded union (PCS,
PCP, PCM), use only the hexagon for clamping.
NO CLAMPING TORQUE MUST BE APPLIED TO THE CASE CONTAINING THE
ELECTRONICS.
USE THE HEXAGON.
7.3.
MOD. PCR (with slide)
The transducer is supplied with two fixing bases with plastically insulated suspensions.
Remember to ground measuring head pin.
8.
PRESSURE ACTION ON THE MEASURING PROBE
The outside pressure has a radial direction on the external wall of the probe itself and axial
on the tip of the probe (A) (fig. 3).
Radial action tends to reduce
(= press) the circular walls of the probe but has no significant
effect on the measurement.
The axial action
of the pressure on the tip of the measuring probe (A) tends to reduce its
length. This is also generally negligible.
9. ELECTRICAL SPECIFICATIONS.
9.1. POWER SUPPLY
Serie PC electronics is equipped with built-in voltage regulators that allow transducers to
receive a power supply of 24 VDC, ±15%.
To guarantee correct operation, the supply voltage must be stabilised and filtered
at 24
VDC
.
Calibration and testing are done in the factory at 24 VDC.
Interconnecting cables must be of size that can support currents at least of 0,8 A.
To reduce external electrical interference, the power supply must satisfy EC standards and
thence be contained within a metal casing with also shielded and grounded supply cables.
Warm-up
: after turning on the transducer, it is advisable to wait a few seconds before
starting any measure or calibration. This gives the built-in electronics time to warm up and
to reach the correct operational temperature. The warm-up time, common to all the
electronic equipment, depends on the context of the transducer application.
