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 Compact
Admittance Material Sensing switch (ADMiRE)
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Intelligent and Self Checking |
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SAPCON 'ADMiRE' is a high-end RISC core microcontroller based level sensing limit switch, based on admittance
principle. With it's specially developed algorithm it tracks the material trend continuously. In associaion with its 3-element probe utilizing
the driven shield principle, it compensates for material build-up and thus It is immune to
material build-up to a much larger extent. Simple push button type - hassle-free - calibration renders the unit installation and comissioning much easier. Failsafe selection and Cover/Uncover delays are settable any time while the device is in use. Available output options are PNP-NO and SPDT change-over relay. Power options are 10 to 55 VDC for PNP/NO and 85 to 265 VAC 50/60Hz for SPDT changeover type. SPDT with AC operation is also available in Flameproof enclosure. |
The
sense
and
ground
element
of the
probe
form the
electrodes
of a
capacitor
with the
service
material
as the
dielectric.
When the
probe is
not
covered,
the
dielectric
is that of
air,
whereas
when
covered,
it is
that of
the
service
material.
A change
in the
physical
level of
the
material
causes a
change
in the
dielectric
media
between
the two
electrodes,
thus
causing
a change
in the
measured
capacitance.
Using its three electrode sensing element, ADMiRE calculates the admittance of the capacitor being formed by the material. ADMiRE tracks the maximum and minimum values of the admittance change and thus tracks the status of material. If ADMiRE is operated in OPTIMIZATION mode, then it will give material by observing "material falling - admittance lowering" and "material rising - admittance increasing" trend , which will be guided by the calibration time set-point material to admittance relation. This continuous compensation will give correct switching output even when build-up is way too thick. When operated as normal level limit switch, it will give switching output as per above and below calibration time material to admittance setting. The covered
and/or
uncovered
delay,
can be
set as
desired.
Calibration
can be
done
easily
with the
help of
a
push-button.
OPTIMIZATION is activated by setting cover-delay switch and uncover-delay switch to ON position simulteneously. ADMiRE circuitry is self compensating for ambiant temperature drift and thus reliable switching is ensured over the operating temperature range.
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Technical Data |
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Evaluation Unit
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Power
supply |
10 -55V
DC (optional 85 to 265 VAC 50/60Hz) |
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Outputs |
PNP-NO (optional SPDT potential free relay output) |
| Max.
Load
current |
Non-Latching 120mA for PNP-NO |
| Indication |
B-Color LED Red: Alarm, Green : Normal |
| Fail-safe
mode |
Minimum or Maximum (Field Selectable)
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| Switching
delay |
Covered / Uncovered configurable from 1 to 20 seconds |
| Housing |
Cast
aluminium
weather-proof (Optional Flame-proof) |
| Cable
entry |
1 no. ½”
BSP |
| Sensor
mounting |
<1” BSP /
NPT |
| Probe
Insertion
length |
minimum 100 mm |
| Weight |
~1.300
Kg |
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Easy to calibrate, using a
push-button.