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FLOW
Product Data Sheet

DS1225

Platon Vampire - Electronic
Indicator
PLATON TYPE GMTX

OPERATING PRINCIPLE

The GMTX electronic indicator with
microprocessor enhanced performance and
LCD panel display of flow rate and total,
designed for use with a metal tube variable
area flowmeter for liquid, gas or steam
measurement.

The VAMPIRE is a metal tube variable area
flowmeter; as the flow up through the
precision machined tapered tube increases,
the float rises, reaching an equilibrium
position. Electron beam welded within the
float casing is a magnet. Two “Hall effect”
magnetic field sensors measure both the
vertical and horizontal components on this
field. The angle of the magnetic field
defines the position of the float in the
tapered tube. This solid state measurement
eliminates the problems of mechanical
hysteresis associated with conventional
magnetic pointers. Field angle is also
independent of the absolute value of
magnet strength, and sensor sensitivity.

Suitable for use with body options, the
VAMPIRE (Variable Area Micro Processor
Indicator Readout Electronics) has a totally
solid
state
measurement
system,
eliminating mechanical hysteresis errors.
Microprocessor interpolation between flow
data points, stored in factory calibrated
look-up tables, gives an improvement to
±1% accuracy for this technique.
The loop powered 4-20mA transmitter is
certified intrinsically safe to CENELEC
standards, for use in a potentially hazardous
area. Both loop powered and AC mains
powered units have separate high and low
flow alarm outputs.

FEATURES
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4-20mA transmitter
Intrinsically safe approval
Liquid or gas flow calibration
Built-in flow totaliser
Operator adjustable high and low
alarms
1% accuracy
VA meter reliability
Program setting password protection

DS1225

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