The MPILC series is a microprocessor based level
detection assembly designed to withstand the
acute environment conditions and give you
accurate detection of service material level in
your process unit. This continuous level
indicator can be used for any solid or liquid
that has a homogenous composition and a stable
dielectric value.
The MPILC system has a microprocessor which
checks the complete system and itself before
validating the signal. A flashing green LED
serves as heartbeat to indicate a healthy
system. In the event of occurrence of a system
fault such as incorrect wiring, open or short
sensor connection, failure of probe insulation,
improper grounding or electronic insert failure,
the heartbeat stops, fault LED glows, display
indicates “Err--“ and the relay contacts revert
to their fail-safe condition.
The MPILC continuous level measurement system
uses a two-wire Pulse Frequency Modulation (PFM)
for interference-free signal transmission
between probe and evaluation unit. Complete
indication system is checked before each
measurement. The system has an auto-compensation
for temperature drift in the vicinity of the
pre-amplifier.
Flexibility is a feature that is deemed
essential by users in a continuous monitoring
environment. In the MPILC continuous level
sensor, features such as operating mode
(independent/pump control), delayed switching
for probe covered or uncovered condition,
fail-safe high or low, switching sensitivity,
switching delay in seconds and set point
calibration are programmable via key pad. This
makes level measurement as easy as clicking a
button. Moreover, the programmed parameters are
stored in a non-volatile memory indefinitely
requiring no battery backup.
Technical
Data
Evaluation Unit
Housing
: Cast
Aluminium
Whether-proof
Stoving
Enamel
painted,
suitable
for back
panel/wall
mounting.
Cable
Entries
: 3 Nos.
½” BSP/NPT
Operating
Temperature
: –20 to
+60º C
Mains
: 90
-260 V
AC / 50
- 60 Hz.
24V AC
Power
Consumption
: 3.5 VA
approx.
Measuring
range
: 10 pF
to 4500
pF
Offset
: 30 pF
to 280pF
Indication
:
Percentage
display
from –
50% to
+150% on
multipurpose
5 Digit
0.5” LED
display (2”
display
also
available
in
separate
housing)
Accuracy
: +/- 2%
of the
measuring
range
Programming
: via 5
push
button
keys
Analog
Output
: 4 -20
mA
galvanicaly
isolated
output
with two
wire
capability
Load
Resistance
: RL
(Max) =
1 KΩ
Galvanic
Isolated
: 18 to
22 V
(Safe
RL
(Max)
=
800 Ω
for on
board
supply
Relay
output
: 3
potential
free
relays,
(rated
at
6A,230V,AC,
50Hz for
non-inductive
load),
for
three
point
level
switching
Independent/pump
control
switching.
Time
delay
programmable
up to 99
sec.
Dimensions
:
Overall
185X185X85mm
PRE-AMPLIFIER
(Electronic
Insert) LDC -
117:
Housing
:
Plastic
with
electronics
potted
epoxy
resin,
mounted
in probe
head.
Potting
: -20ºC
to 80º
C. 12 V
at 17 mA
max.
derived
from
evaluation
unit
only.
Operating
Temperature
: -20ºC
to +80º C
Supply
: 18V DC
at 10mA
(approx)
derived
from
evaluation
unit
Measuring
Frequency
: 50
-250 KHz
Probe
Probe
Head
: Cast
Al.
weather-proof.
Mounting
: Flange
or
Screwed
as per
requirement
Length
: 150 mm
to 3000
mm in
Rod
Probe,
greater
than
3000 mm
in Rope
Insulation
: Part
or Full
PVC,
PTFE,
Ceramic
(Part
Only)
depending
on
service
temperature
of 80ºC,
200º
C
or
400ºC
respectively.