Colima Visco and Viscorol Magnetic level indicators
TI-P329-01
CH Issue 1
Page 5 of 8
Converter's housings
Housing for safe area
Weather-proof IP65, plastic.
Housing for safe area, low / high temperature
Special type suitable to low temperatures or
installation in high
concentration saline environments and for use
in the food industry.
Entirely in stainless steel.
Protection degree IP67.
On request IP68.
Up to two cable entrances.
Housing for hazardous area, ATEX certified
ATEX certified II 1/2 G EEx d IIC T6, T5
resp. T4 for use in hazardous areas.
In pressure die-cast aluminium with a
polyamide paint.
Protection degree IP67.
Up to two cable entrances.
Potentiometer transmitter characteristics
A potentiometer is placed in the vertical weather-proof tube
outside the level indicator.
The total resistance of a known value is measured at the ends of
this potentiometer.
The float, following the liquid level trend, activates the potentiometer’s
reed contact chain through its own magnetic field, locally closing
the signal.
The total value of the resistance is measured 100% at its maximum
level and 0% at its minimum level.
The end poles of the potentiometer are connected to a converter
that transforms the input value into Ohm and the output into mA.
Converter types
Converter for safe area
Field set using two trimmers
[for the Z (zero) gauging and G
(gain) gauging],
without resorting to
interconnecting systems.
Converter for inbuilt safe area
Field set using two trimmers
[for the Z (zero) gauging and
G (gain) gauging], without
resorting to interconnecting
systems.
Converter HART
®
protocol
Converter regulated with an
interconnection cable.
Resistance input 1 k ÷ 100 k Ohm
Current output 4÷20 mA
Reading resolution available
5 mm
10 mm
20 mm
Resistance input 1 k ÷ 100 k Ohm
Maximum allowable temperature -20°C to +100°C
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