background image

Operating Instructions MBI 46.51.39

 

 

 

Version 0.9 

 

en MBI 46.51.39 operating instructions.docx 

Issue: 08/2022 

page 23 from  29 

 

Figure 14 

Ideal zero-point linearity, max linearity error reduced to 0.32% 

 

5.7.2  Optimization with minimal absolute error  

If the linearity curve shall be optimized for minimal overall absolute error diregarding the zero-
point accuracy, then you can further improve the curve omitting the setting at zero point. 

Slightly adjust the zero point by the potentiometer and thus move the linearity curve until the 
maximum positive and negative error are equal in amount. 

 

 

Figure 15 

Lowest deviation (max. 0.22 %) in the entire measuring range 

-0,4

-0,3

-0,2

-0,1

0

0,1

0,2

0,3

0,4

0,5

0,6

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

35

40

45

50

L

in

e

a

rit

ä

ts

fe

h

le

in

 %

 v

o

m

 E

n

d

we

rt

Messweg in %

Kurve
1

-0,3

-0,2

-0,1

0

0,1

0,2

0,3

0,4

-50 -45 -40 -35 -30 -25 -20 -15 -10

-5

0

5

10

15

20

25

30

35

40

45

50

Li

nea

ri

ts

fe

hl

e

in 

%

 v

om

 E

ndw

e

rt

Messweg in %

Kurve
2

Kurve
3

Summary of Contents for MBI 46.51.39 Series

Page 1: ...Operating Instructions MBI 46 51 39 Version 0 9 en MBI 46 51 39 operating instructions docx Issue 08 2022 page 1 from 29 Operating instructions for Carrier Frequency Amplifier Series MBI 46 51 39...

Page 2: ...e of warnings 5 3 2 Other markings 5 4 Product 6 4 1 Terms and definitions 6 4 2 Function and design 8 4 3 Suitable displacement transducers 8 4 4 Types and options 11 5 Commissioning 13 5 1 Wiring De...

Page 3: ...ate has been removed from the device 1 2 Importance of Nameplate The specification of the model type and the manufacturing number is required for repair and for the procurement of subsequent deliverie...

Page 4: ...rms of temperature and IP protection etc Do not use the device near other machinery or devices such like large electrical machines high voltage cables and facilities that generate strong electric or m...

Page 5: ...eath or serious bodily injury occurs if it is not avoided Indicates a dangerous situation in which death or serious bodily injury can occur if not avoided Characterizes a dangerous situation in which...

Page 6: ...oke sensors based on the eddy current principle Long stroke sensors are inductive displacement sensors using a half bridge circuit where only one coil is used for measuring The second coil is designed...

Page 7: ...e per mm of displacement e g 10 mV V mm For standardization purposes information on sensitivity and rated output for MESSOTRON displacement sensors is determined and provided independent of phase i e...

Page 8: ...ly i e in relation to the supply voltage This avoids measurement errors due to fluctuations in the supply voltage e g due to impedance change of the displacement transducer or cables In the following...

Page 9: ...its middle position the impedances of the two measuring coils change and the measuring voltage grows proportionally within the measuring range proportionally with the displacement of the core 4 3 2 L...

Page 10: ...replacement circuit A movable measuring tube changes the impedance of the measuring coil according to the eddy current principle In contrast to the symmetrical displacement transducers the electric ze...

Page 11: ...Drawing The device comes in a rugged aluminum field housing of industrial standard It is dustproof and protected against water jets in accordance with protection class IP 66 DIN EN 60529 For mounting...

Page 12: ...moisture and dirt from outside The individual strands of the connection cables are placed in the protected interior of the housing The cable shield is connected to the housing with a grounding screw M...

Page 13: ...D protective measures Swapped or faulty connection in particular external voltages connected to the signal output or sensor input output can destroy the device If the connection cable is laid properly...

Page 14: ...ment in the following table using spring loaded terminals There is no soldering work required Pin Clamp Type Assignment 1 Supply Supply voltage 24V High 2 Supply Supply voltage 24V Low 3 Signal Voltag...

Page 15: ...be is moved down away from the transducer coil If an inverted negative decreasing signal is desired one of the terminals 8 and 9 or alternatively terminals 6 and 7 may simply be swapped MBI 46 51 39 D...

Page 16: ...in the mechanical adjustment of the displacement transducer can also be compensated Figure 8 7Correcting the Zero Point The adjustment of the zero point potentiometer causes a vertical shift of the me...

Page 17: ...that the phase position caused by the displacement transducer is compensated and the full sensitivity of the displacement transducer can be used 5 3 3 Reinforcement The gain of the amplifier must be a...

Page 18: ...r type Before starting the adjustment the measuring amplifier must be set whether an inductive displacement transducer with symmetrical or with asymmetrical coil mount is to be used In the standard co...

Page 19: ...ne of the 4 gain ranges Gain Range JP1 4 310 740 mV V JP1 3 130 310 mV V JP1 2 55 130 mV V JP1 1 25 55 mV V Figure 118 Setting of Gain Range 5 6 Adjustment of offset gain and phase shift Subsequently...

Page 20: ...tructions MBI 46 51 39 Version 0 9 en MBI 46 51 39 operating instructions docx Issue 08 2022 page 20 from 29 Figure 12 Position of the trim potentiometers gain adjustment zero point offset phase shift...

Page 21: ...range and set the voltage to the desired output signal with the gain potentiometer Then check the setting at the beginning of the nominal range and correct it slightly if necessary If adjusting the ou...

Page 22: ...the amplifier according to the steps described above The maximum linearity error in the measuring range under consideration is 0 5 It is zero in the middle and at the end of the measuring range Figure...

Page 23: ...improve the curve omitting the setting at zero point Slightly adjust the zero point by the potentiometer and thus move the linearity curve until the maximum positive and negative error are equal in a...

Page 24: ...08 2022 page 24 from 29 5 7 3 Other linearity optimizations Figure 1613 Null error setting at the beginning and end of the measuring range 0 5 0 4 0 3 0 2 0 1 0 0 1 0 2 0 3 0 4 50 45 40 35 30 25 20 1...

Page 25: ...HINT Do not try to repair a defective amplifier independently Repair attempts of any kind lead to the loss of the warranty and liability claim MESSOTRON devices are intended for use in harsh industria...

Page 26: ...es to avoid electrostatic charging ESD protective measures When cleaning pay attention to the following points Clean the case or front panel only with a soft slightly damp cloth Carefully remove dry d...

Page 27: ...Operating Instructions MBI 46 51 39 Version 0 9 en MBI 46 51 39 operating instructions docx Issue 08 2022 page 27 from 29 10 EU Declaration of Conformity 11 Specifications...

Page 28: ...rature coefficient of zero point 0 10 10 K 100 mV V 0 15 10 K 20 mV V Temperature coefficient of gain 0 05 10 K 100 mV V 0 15 10 K 20 mV V Operating temperature 30 70 C Storage temperature 30 85 C Pro...

Page 29: ...ng instructions docx Issue 08 2022 page 29 from 29 Changes and errors excepted 2022 MESSOTRON GmbH Co KG MESSOTRON GmbH Co KG Friedrich Ebert Str 37 D 64342 Seeheim Jugenheim Germany Tel 49 6257 999 7...

Reviews: