FIBERTRAC 31 Radiometric sensor

Vega FIBERTRAC 31 Radiometric sensor

The FIBERTRAC 31 is a radiation-based sensor for continuous measurement of liquids and bulk solids with a flexible plastic sensing element. It is suitable for level measuring in situations involving key product features, aggressive products, or extremely high process temperatures. Even under the most demanding application circumstances, the FIBERTRAC 31 produces accurate measuring results.

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High plant availability through non-contact measurement
Simple mounting on round and conical vessels thanks to flexible detector
Cost savings through use of only one sensor for measuring ranges up to 7 m

In radiometric measurement, a Caesium-137 or Cobalt-60 isotope emits focussed gamma rays. A special sensor on the opposite side of the vessel receives this radiation. The scintillator of the sensor converts these gamma rays into signals, the number of which is detected and evaluated. Since gamma rays are attenuated when penetrating matter, the sensor is able to calculate the level, the limit level, the density and the mass flow rate from the intensity of the received radiation.

Measuring range

1 … 7 m (3.28 … 22.97 ft)

Non-repeatability

±0.5 % at -20 °C … +50 °C

(-4 °F … +122 °F)

Ambient temperature

-20 °C … +50 °C (-4 °F … +122 °F)

Extended range available

Voltage supply

Operating voltage	20 … 72 V DC; 20 … 253 V AC, 50/60 Hz
Max. power consumption	4 W; 6 VA

Analogue input

Input type	4 … 20 mA passive
Internal load	250 Ω

Switching input

Input type
Ʋ Open Collector	10 mA
Ʋ Relay contact	100 mA

Relay output

Switching voltage

max. 253 V AC/DC

Switching current

max. 3 A AC (cos phi > 0.9), 1 A DC

Breaking capacity

min. 50 mW, max. 750 VA AC, 40 W DC

(with U < 40 V DC)

Current output

Range	4 … 20 mA/HART, active or passive
Max. load	500 Ω (300 Ω with intrinsically safe IS)

Switching output

Type of output	NPN transistor output (floating)
Switching voltage	< 55 V DC
Load current	< 400 mA

General data

Weight

max. 9.2 kg (20.3 lbs) + 1.22 kg/m

(0.82 lbs/ft)

SIL qualification

Optionally up to SIL2

The detector rod consists of galvanized steel with a Santoprene rubber coating. Polystyrene is used as scintillation material.

The housing is available as double chamber version of Aluminium or stainless steel in protection class IP66/IP67.

The instruments are available in different electronics versions. Apart
from the four-wire electronics with 4 … 20 mA/HART, two purely digital versions with Profibus PA and Foundation Fieldbus are possible.

Worldwide approvals are available for VEGA instruments, e.g. for use in hazardous areas, on ships or in hygienic applications. The technical data in the respective safety instructions are valid for approved instruments (e.g. with Ex approval). In some cases, these data can differ from the data listed herein.

The adjustment of the instrument is carried out via the optional display and adjustment module PLICSCOM or via a PC with the adjustment software PACTware and corresponding DTM.
The Bluetooth version of display and adjustment module enables a
wireless connection to standard adjustment units. This can be for example a PC with PACTware and Bluetooth USB adapter.
Here, the adjustment is carried out via the adjustment software
PACTware and the respective DTM.