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11 Supplement
MINITRAC 31 • Foundation Fieldbus
41782-EN-211203
11 Supplement
11.1 Technical data
Note for approved instruments
Thetechnicaldataintherespectivesafetyinstructionswhichareincludedindeliveryarevalidfor
approvedinstruments(e.g.withExapproval).Thesedatacandierfromthedatalistedherein,for
example regarding the process conditions or the voltage supply.
Allapprovaldocumentscanbedownloadedfromourhomepage.
General data
316L corresponds to 1.4404 or 1.4435
Materials,non-wettedparts
Ʋ Scintillation material NaI(sodiumiodide)
Ʋ Aluminium die-cast housing Aluminiumdie-castingAlSi10Mg,powder-coated(Basis:
Polyester)
Ʋ Stainless steel housing 316L
Ʋ Sealbetweenhousingandhousinglid NBR(stainlesssteelhousing,investmentcasting),
silicone(Aluminiumhousing)
Ʋ Inspectionwindowinhousingcover
(optional)
Polycarbonate or glass
Ʋ Ground terminal 316L
Ʋ Cable gland PA, stainless steel, brass
Ʋ Sealing, cable gland NBR
Ʋ Blind plug, cable gland PA, stainless steel
Processttings
Ʋ Fastening lugs ø9mm(0.35in),holecentredistance119mm(4.69in)
Weight
Ʋ Aluminiumhousing,withelectronics 4.1kg(9lbs)
Ʋ Stainlesssteelhousing,withelectron-
ics
9.1kg(20.1lbs)
Ʋ Maximumtotalweight,incl.accessory 72kg(158lbs)
Max.torque,mountingscrews
Ʋ Fastening lugs in the sensor housing 15Nm(11.1lbfft),stainlesssteelA4-70
Max. torque for NPT cable glands and Conduit tubes
Ʋ Aluminium/Stainlesssteelhousing 50Nm(36.88lbfft)
Input variable
Measured variable The measured variable is the intensity of the gamma ra-
diation of an isotope. If the radiation intensity decreases,
e.g. due to increasing product density, the measured
value of MINITRAC 31 changes in proportion to the
density.
Analogue input
Ʋ Input type 4 … 20 mA, passive
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