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2 Product description

MINITRAC 31 • Foundation Fieldbus

62076-EN-190704

The measured value is detected contactlessly right through the vessel 

wall. Neither a process fitting nor a vessel opening are required. The 

instrument is thus ideal for retro installation.
The instrument can be used for many different measuring tasks. Apart 

from the main applications such as density measurement and level 

detection, the MINITRAC 31 can also detect residues and the mass 

flow rate in conjunction with a flow meter.

1

2

3

4

Fig. 2: MINITRAC 31 - Application possibilities
1  Level measurement - Residue detection

2  Point level detection

3  Density measurement

4  Mass flow measurement

Further application possibilities are also the use as X-ray alarm or real 

value correction.
If X-ray alarm is selected, the instrument detects radiation from exter-

nal sources. Possible external radiation sources can be, for example, 

a weld joint test in a neighbouring facility or other radiometric instru-

ments.
When the instrument operates as real value correction it transmits the 

real value to correct another radiometric sensor. The measurement 

can thus be adapted perfectly to the situation in the vessel.

In radiometric measurement, a Caesium-137 or Cobalt-60 isotope 

emits focussed gamma rays that are attenuated when penetrating 

the tube wall and the medium. The NaI detector on the opposite side, 

on a pipeline for example, receives the radiation. The intensity of the 

Functional principle

Содержание MINITRAC 31

Страница 1: ...Quick setup guide Radiometric sensor for density measurement MINITRAC 31 Foundation Fieldbus Document ID 62076...

Страница 2: ...necting to power supply 17 4 1 Preparing the connection 17 4 2 Connection Density mass flow rate measurement 19 4 3 Connection Level detection 22 5 Set up with the display and adjustment module 24 5 1...

Страница 3: ...with all prevailing regulations and directives The instrument must only be operated in a technically flawless and reliable condition The operator is responsi ble for the trouble free operation of the...

Страница 4: ...AMUR is the automation technology user association in the process industry in Germany The published NAMUR recommendations are accepted as the standard in field instrumentation The device fulfils the r...

Страница 5: ...low ing text is only available in the English language Installations in the US shall comply with the relevant requirements of the National Electrical Code ANSI NFPA 70 Installations in Canada shall co...

Страница 6: ...ry date HTML Order specific instrument features HTML Operating instructions and quick setup guide at the time of ship ment PDF Order specific sensor data for an electronics exchange XML Test certifica...

Страница 7: ...measurement 4 Mass flow measurement Further application possibilities are also the use as X ray alarm or real value correction If X ray alarm is selected the instrument detects radiation from exter na...

Страница 8: ...points are important for measurement with radiometric methods A handling permit is required for operation of a system using gamma rays This permit is issued by the respective government office or the...

Страница 9: ...radiation protection ordinance is complied with and for implementing all radiation protection measures Control areas are areas in which the local dose rate exceeds a certain value Only persons who und...

Страница 10: ...gh cleaning processes and on cooled or heated vessels Note Make sure that the degree of contamination specified in chapter Technical data meets the existing ambient conditions Note Make sure that duri...

Страница 11: ...mounting information for your measuring point You must follow the instructions in this Source Sizing document in addition to the following mounting instructions The following mounting information is...

Страница 12: ...urement A density and concentration measurement is possible on pipelines and vessels The accuracy of the measurement increases in propor tion to the radiated length L of medium This is particularly im...

Страница 13: ...L 3 Extension of the radiated length L by adding a tube angle piece as meas uring distance 4 Integrated lead cover as protection against ambient radiation the instru ment is hence shielded laterally...

Страница 14: ...Fig 6 Mass flow rate measurement 1 Flow meter 2 MINITRAC 31 Point level detection For level detection the sensor is generally mounted horizontally at the height of the requested limit level Make sure...

Страница 15: ...1 Horizontal mounting 2 Vertical mounting 3 Mounting horizontally at right angles to container Level measurement Residue detection The MINITRAC 31 can be used for residue detection e g in storage tan...

Страница 16: ...rom the heat source Make sure these measures are taken into account already in the plan ning stage If you want to carry out such measures later on contact our specialists to ensure that the accuracy o...

Страница 17: ...tle strip approx 1 cm 0 4 in of insulation from the ends of the individual wires 4 Insert the cable into the sensor through the cable entry 1 Fig 9 Connection steps 4 and 5 1 Locking of the terminal b...

Страница 18: ...nect the external ground terminal to potential equalisation 9 Tighten the compression nut of the cable entry gland The seal ring must completely encircle the cable 10 Screw the housing lid back on The...

Страница 19: ...transistor 6 Switching input floating 7 Transistor output 8 Interface for sensor sensor communication MGC 9 Simulation switch 1 simulation on 10 Setting the bus address for sensor sensor communicatio...

Страница 20: ...PE 5 6 22 11 12 21 22 19 20 18 17 14 13 16 15 12 Fig 12 Electronics and connection compartment Ex d with instruments with intrinsically safe signal output 1 Voltage supply 2 Relay output 3 Signal inp...

Страница 21: ...with instruments with intrinsically safe signal output 1 Terminals for intrinsically safe signal output FF bus 2 Contact pins for the display and adjustment module or interface adapter 3 Terminals for...

Страница 22: ...n MGC 9 Simulation switch 1 simulation on 10 Setting the bus address for sensor sensor communication MGC 3 5 6 7 8 2 1 Fig 15 Adjustment and connection compartment with non Ex instruments and instrume...

Страница 23: ...output 7 Interface for sensor sensor communication MGC 8 Simulation switch 1 simulation on 9 Setting the bus address for sensor sensor communication MGC 4 5 6 7 8 2 3 4 1 2 1 Fig 17 Adjustment and con...

Страница 24: ...isplay and adjustment module onto the electronics and turn it to the right until it snaps in 4 Screw housing lid with inspection window tightly back on Disassembly is carried out in reverse order The...

Страница 25: ...setup or after an instrument reset the instrument starts with preset standard values These value are not suitable for your ap plication and must be replaced by real values 5 2 1 Setup Enter here the r...

Страница 26: ...ensor First of all select the unit of the inside diameter Enter in the menu window Inside diameter the inside diamter of the tube for example in cm If the tube is not radiated with 90 then you have to...

Страница 27: ...process conditions or the voltage supply Electromechanical data version IP 66 IP 67 Cable entry M20 x 1 5 2 x cable gland M20 x 1 5 cable 6 12 mm 4 x blind plug M20 x 1 5 Included 1 x cable gland M20...

Страница 28: ...of delivery application practical use and operat ing conditions of the sensors and processing systems correspond to the information available at the time of printing Subject to change without prior n...

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