E3 14 DTR.SG...05
(ENG)
8. INSTALLATION AND CONNECTION
8.1. Mechanical Installation
The probe can be suspended from the power supply cable e.g. using the handle SG prod. Aplisens.
If the probe will often be removed or, when during the pull, there is the possibility of hitching protruding
elements it is recommended to suspend the probe on a steel cable using the supporting handle (not applicable
to
SGE-16
). If the cable is to be exposed to current or turbulence, it should be installed in a protective tube,
e.g. one made from PCV.
Directly before location the probe in measured medium to take off from diaphragm seals
SGE-25S, SGE-25S.SMART, SGE-25C the securing covers.
Protect the level probe from impacts during installation.
The probe with an additional Teflon shield suspends on a steel cable or on an internal cable (do not
catch for teflon).
The probe in Ex-version with a cord for earthing suspend on a steel cable using the lifting handle.
8.2. Electrical Connection
The method of making electrical connections is shown in figure 2, 3A, 4A (for Ex version in figure
3 „Appendix Ex”).
If the transmission line leads to remote premises via the open air, it is recommended that a terminal box
be fitted, e.g. the Aplisens type PP, in order to
connect the probe’s cable to the remaining section of the
transmission line. The box should have an IP65 ingress protection rating, and but should not be so airtight as
to prevent the probe’s active sensing device from “breathing” via a capillary embedded in the cable.
The opening of the capillary should not be allowed to become dirty, and water should not be allowed to enter
the capillary.
Where the transmission line is very long, it is recommended that the section leading from the end of the probe
cable be made from twisted pair cable, and it is desirable that entry points to other devices be fitted with
excess voltage protection, e. g. the Aplisens UZ-2 system.
The cable of the probe and the remaining section of the transmission line should be protected from
mechanical damage.
From the probe power supply is led cable screen (green wire). The manufacturer recommends connecting the
probe cable shield to the ground point measuring system; grounding of the cable shield is particularly
appropriate in an environment of large EMC; e.g. the pumping station when the cable passes the test probes
power cable supply pump. Cable shield in work station with battery may, but need not be grounded.
9. SETTINGS AND REGULATION
9.1. Settings of SGE-25, SGE-16, SG-25C, SGE-25S probes
The
SGE-25, SGE-16, SGE-25C
,
SGE-25S
are factory set to the range stated in the order. The user does not
have access to the “zero” and “range” potentiometers. Setting may be adjusted by the manufacturer only
.
9.2. Settings of SGE-25.SMART, SGE-25S.SMART, SGE-25S.SMART/TITAN
probes
The
SGE-25.SMART
and
SGE-25S.SMART
probes are equipped with a smart electronic and HART
communication system, thought which the
user can make e.g. set „zero” and measurement ranges.
9.3. SGE-25.SMART, SGE-25S.SMART, SGE-25S.SMART/TITAN.
Measurement ranges. Definitions
9.3.1.
The maximum range of level, while the probe can measure is called
„basic range”
(for specifications
of “basic range” see 5.1.1).
The width of the basic range is the difference between the upper and lower limits of the basic range.
The internal characteristic conversion curve for the basic range is coded in the probe’s memory.
This is the reference curve used when making any adjustments which affect the probe’s output signal.
9.3.2.
When the probe is in us
e the term “set range“ is used.
The set range is the range whose lower end-point corresponds to an output current of 4mA and whose upper
end-point corresponds to a current of 20mA (or 20mA and 4mA respectively when the conversion curve
inverted). The set range may cover the whole of the basic range or only a part of it. The width of the set range
is the difference between the upper and lower limits of the set range. The probe may be set to any range
within the basic range of level values, subject the restrictions set out in the table in 5.1.
1.
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Summary of Contents for SGE-16
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