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MIBOO IN-TECH cargo tank high & hihg-high level alarm and temperature
monitoring system is throughly designed according to IMO'S latest requirements,
and are to be required by IBC code
◈ Operating Principle
The MIBOO IN-TECH high&high-high level
switch with temperature sensor is available for simultaneous detection
of cargo temperature with high & high level detection, but is electrically
independent each other. When the magnetic float moves upward with rising
level, the hermetically sealed magnetic reed switch within the stem will
be de-activated. This switch will be in an open-state position, which
output alarm.
When the magnetic float moves downward with
falling level, the reed switch will be activated and will be in a closed-state
position (non alarm position).
The 95% switch is normally for alarm, and
the 98% switch is normally for either closing of valves or give a visual
and audible tank overfill alarm for shut-down of pumps. A float test lever
is provided for manually functional test to check integrity of high and
high-high level alarm system.
The temperature monitoring system conisists
of temperature sensor current signal converter and display unit with high/low
tenperature alarm.
Three, two or one pieces of temperature sensors will be inserted
in guide pipe. In case of three pieces of temperature are required, each
of them will be located about 1m below deckhead, middle of tank depth
and about 1meter above tank bottom respectively. In case of two, usually
mid-tank and bottom, and at bottom in case of one.
If the gauging of vapor pressure isn additionally
required, the sensor of vapor prssure finding is usually fitted under
the fitting flange of terminal box to detect the pressure of vapor from
fluid in tank.
The vapor pressure alarm monitoring system
can be optionally provided in addition to this system for the ship which
is to be built under VECS requirements of USCG regulation.
◈ Features
• Simultaneous
measurement of level alarm and high temperature alarm by one unit.
• Most
advanced electric technology for high reliability and durability.
• Certified
by major certifying authorities.
• Designed
for all kind of liquid.
• Simple
construction.
• Intrinsically
safe designed unit is applicable to all kind of inflammable fluids.
◈ Technical Specification
• Detection
unit
※ Level Alarm-Reed switch with magnetic float
※ Temperature Sensor-PT-100Ω or two-terminal IC
• Temp.
Indicator: By selected type-LCD indicator
Range-0~100℃(3-digit)
• Material
: ※ Housing-SUS304
※
Flange-SUS304 or SUS316
※
Guide pipe-SUS304 or SUS316L
※
Float-SUS316L
• Detecting
Accuracy : Alarm-±2mm
Temperature-±1℃
• Anti-Explosion
Structure : Intrinsically safe
EEX
ia ∥C T4
• Protection
: IP56 over
• Max.
working pressure : 5㎏/㎠(option 20㎏/㎠)
• Temp.
measuring range : -50~+120℃
• Contact
rating : 250VAC, 0.25A
• Specific
gravity : 0.65~1.5
• Installation
: ※ Level sensor-JIS 5K 100A(STD.)
※ Level & Temp. sensor-JIS5K 100A(STD.)
• Conduti
connection size : JIS 5K32A FF(standard)
• Power
supply : AC110/220V, 60Hz(Back up : DC24V)
• External
alarm : High and high-high alarm(overfill)on the bridge top
• Alarm
point : ※ High alarm-at 95% of volume
※ High-high alarm-at 98% of volume
• Cargo
monitoring panel :
The cargo monitoring panel will be designed and arranged for
level alarm, high temp.
alarm and temp. measurement based on the number of tank location
etc.
The cargo monitoring panel gives audible and visible alarm
as well as cargo temp.
indication on the monitoring panel and also external alarm prepared
by control panel
gives an audible and visible notification to the operators on deck.
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