background image

Calculation of the impulse factor: IF = maximum value/mean value of the absolute raw
values

1

2

Figure 7: 

Impulse factor

 example

1

IF = 4.2

2

IF = 1.44

4.3.6

Vibration in the frequency range

Vibration data in the frequency range in many cases allow for a much more precise
identification of vibration causes than the previously discussed time range values.
For this purpose, the vibration signal is transmitted from the time to the frequency
range by means of FFT (

Fast Fourier Transformation

). The information of what are the

dominant frequencies in a vibration makes it possible to better understand the cause
of the vibration. For example, the vibration of an motor always contains vibrations with
frequencies corresponding to the motor speed, but can also contain vibrations caused
by the motor bearings or electronic components such as the rectifier, which contain
other frequencies.

The acceleration or speed spectrum of the vibration can be observed through the
frequency.

The analysis in the frequency range is based on the vibration values of one axis or
the sum signal of all 3 axes (magnitude). The selection is made via the settings of
the vibration analysis (

see "Settings for vibration analysis (Index 4477, 4479, 4482,

4531)", page 12

).

The settings for trigger, block length and number of blocks for averaging have the
same effect on vibration analysis in the frequency range. The bandpass filter must
also be taken into account, which can restrict the frequency range under consideration
between 0.78 and 3,200 Hz.

The frequency resolution is calculated with 1 / block length in seconds. It specifies
both the smallest measurable frequency and the minimum frequency spacing that
two vibration components must have in order to be distinguishable in the frequency
analysis.

Table 6: Block length in relation to frequency resolution

Block length [ms]

Resolution [Hz]
Smallest measurable frequency

20

50

40

25

80

12.5

160

6.25

PRODUCT DESCRIPTION

18

O P E R A T I N G   I N S T R U C T I O N S | MPB10

8028041/2022-08-16 | SICK

Subject to change without notice

Содержание MPB10

Страница 1: ...O P E R A T I N G I N S T R U C T I O N S MPB10 Multi Physics Box...

Страница 2: ...in the limits of the legal determination of Copyright Law Any modi fication abridgment or translation of this document is prohibited without the express written permission of SICK AG The trademarks st...

Страница 3: ...4 3 Vibration analysis Index 4474 4588 12 4 3 1 Principle of operation 12 4 3 2 Settings for vibration analysis Index 4477 4479 4482 4531 12 4 3 3 Trigger Index 4474 4475 15 4 3 4 Activity detection...

Страница 4: ...erature monitoring Index 4352 4355 43 9 5 Shock detection Index 4434 4448 43 9 6 Configuration of digital outputs 44 9 7 Smart Task basic logic A00 45 9 8 Device diagnostics Index 4356 4370 48 9 9 Sys...

Страница 5: ...any work on the sensor in order to familiarize yourself with the sensor and its functions The instructions constitute an integral part of the product and are to be stored in the immediate vicinity of...

Страница 6: ...th or serious injuries if not prevented CAUTION Indicates a situation presenting possible danger which may lead to moderate or minor injuries if not prevented NOTICE Indicates a situation presenting p...

Страница 7: ...a note of all type label data such as type code serial number etc to ensure faster processing ABOUT THIS DOCUMENT 2 8028041 2022 08 16 SICK O P E R A T I N G I N S T R U C T I O N S MPB10 7 Subject t...

Страница 8: ...approved by SICK AG is at your own risk The sensor is not suitable for outdoor applications NOTICE Danger due to improper use Any improper use can result in dangerous situations Therefore observe the...

Страница 9: ...ician Other relevant regulations applicable in other countries must be observed The following qualifications are required for various activities Activities Qualification Mounting maintenance Basic pra...

Страница 10: ...can be found in section 10 Target applications With the ability to set vibration limit values according to ISO 10816 3 see Limit values based on ISO 10816 Index 4534 4536 page 33 the Multi Physics Bo...

Страница 11: ...4 2 3 System architecture The Multi Physics Box provides information for condition monitoring of machines and processes For successful interpretation of conditions and incipient failures ideally the t...

Страница 12: ...s any other values table 2 indicates the typical processing time in relation to the block size After process ing the indication values are updated and a new block is recorded This process is shown in...

Страница 13: ...ength ms Typical processing time ms Average total block length ms 1 280 Only single axis possible 240 1 520 640 320 960 320 160 380 160 80 240 80 40 120 40 20 60 20 10 30 NOTE Single axis operation re...

Страница 14: ...ion values can be calculated based on speed or acceleration values This selection is valid for the time range and the frequency range Indication values calculated based on speed weight low frequencies...

Страница 15: ...This is not the case with dynamic non uniform movements such as punches presses or motors with changing loads Here the data must be recorded at a specific point in time at which a constant vibration p...

Страница 16: ...is detected accordingly 4 3 5 Vibration in time range Index 4483 4539 The Multi Physics Box as shown in section 4 3 1 provides indication values in the time range calculated block by block These valu...

Страница 17: ...Index 4501 4503 The Shape factor is defined as the ratio between the effective value of the signal and the mean value of the absolute values of the signal An increase in the Shape factor indicates an...

Страница 18: ...vibration can be observed through the frequency The analysis in the frequency range is based on the vibration values of one axis or the sum signal of all 3 axes magnitude The selection is made via th...

Страница 19: ...the thermal diffusivity of the material on which the sensor is mounted the more accurate the measurement If the sensor is non flush or there is an adapter plate with poor temperature conductiv ity bet...

Страница 20: ...externally proceed as follows Do not accept the delivery or only do so conditionally Note the scope of damage on the transport documents or on the transport compa ny s delivery note File a complaint...

Страница 21: ...g Observe the maximum permissible tightening torque of the sensor with M3 fixing screws of 10 Nm Recommended mounting screws M3 x 10 according to EN ISO 4762 6 3 Mounting methods NOTICE It should be n...

Страница 22: ...in place accordingly Temporary mounting with magnets Before using the accessories make sure that the mounting surface is flat not curved and ferromagnetic CAUTION Magnetic forces can cause the materia...

Страница 23: ...h the motor As with the other mounting methods mounting the sensor on covers e g the fan cover or other flexible components is not recommended as this makes it much more difficult to interpret the vib...

Страница 24: ...nsulated from each other Wire cross sections in the supply cable from the customer s power system must be designed in accordance with the applicable standards When this is being done in Germany observ...

Страница 25: ...2 and 3 4 must be routed in different cable ducts or metallic separators must be used see figure 12 and see figure 13 This applies particularly where cables of devices with a high level of radiated e...

Страница 26: ...a voltage supply with the following properties Supply voltage DC 10 V 30 V SELV according to currently valid standards Power source with at least 5 W power Protecting the supply cables To ensure prot...

Страница 27: ...arious measured values described in see Product description page 10 Likewise the sensor should be configured using the operation described in see Operation page 28 After switching on the supply voltag...

Страница 28: ...alue monitoring based on ISO 10816 3 Necessary infra structure Evaluation unit for processing the triggered alarms Connection database and visualiza tion Initial effort Low Setting the limits High Occ...

Страница 29: ...iece of equipment for example do not directly trigger an alarm This can be achieved by configuring the alarm behavior alarm delay time accordingly Likewise the alarms can be reset automatically when t...

Страница 30: ...cted as an example Minimum duration of an alarm The alarm reset time thus also implicitly defines the minimum time for which alarms are set If an automatic reset of the alarms is not desired the funct...

Страница 31: ...nge provide very good indications of the general condi tion of machines A change in the indication values in the time range shows that the strength of the vibration a RMS v RMS Variance and or the sig...

Страница 32: ...be operated with restrictions In figure 16 it can be seen that the good machine condition green is demarcated from the condition in restricted operation yellow via the pre maximum limit value An immi...

Страница 33: ...Machines that have vibrations in this range can run in limited operation Continuous operation is not considered suitable Zone B Machines that have vibrations in this range can run without restriction...

Страница 34: ...6 and Impulse factor Index 4507 4509 The Crestand Impulse factors are very similar and essentially differ in their normalization which means that depending on the application one of the indication val...

Страница 35: ...3 2 Monitoring in frequency range Index 4549 4582 In addition to the characteristic values in the time range the determination of market position also monitors the vibration on a single axis section 4...

Страница 36: ...in the Fundamental peak and Dominant peak representing two different peaks This is a strong indicator of a change in the condition of the machine For the Dominant peak and Fundamental peak the curren...

Страница 37: ...lerances Frequency 20 Hz Amplitude factor 2 Resulting limits Frequency Minimum 380 Hz maximum 420 Hz Amplitude Minimum 0 25 g maximum 1 g If the frequency or amplitude of the peaks change beyond the s...

Страница 38: ...below the noise when the lower limit is deactivated without triggering an alarm In addition to the peak frequency ranges the frequency ranges in between are also monitored If the frequency of a peak c...

Страница 39: ...limit values can also be set for the areas between the peaks via Index 4572 NOTE In the case of broadly tapering peaks it can be difficult to simultaneously define a sufficiently narrow frequency ran...

Страница 40: ...Index 4580 Subindex 3 The number of teach in cycles indicates how many individual spectra are analyzed by the teach algorithm to derive the limits A larger number of teach in cycles allows the fluctua...

Страница 41: ...o raw data available 1 raw time range data available 2 vibration frequency spectrum available 2 Number of values in the Snapshot corresponds to the number of samples of the raw time range data of an a...

Страница 42: ...ex 4477 This setting must take place before activating Snapshot mode The frequency spectrum can be read out via the following procedure 1 Activate Snapshot mode via Index 4585 2 This can be used to re...

Страница 43: ...itive Monitoring of the maximum acceleration is event driven Data is only recorded if the acceleration has exceeded an adjustable threshold i e a shock has occurred For a good function of the shock de...

Страница 44: ...be read out in two blocks of 85 values each as follows 1 Set the desired axis via Index 4439 last shock or 4442 strongest shock using Subindex 2 2 Select the first data block block 0 via Subindex 1 3...

Страница 45: ...x 67 Then pin 2 can be parameterized as a switching signal for QL2 via Index 121 The dependency between the alarms defined in bit 6 and 7 must then be configured via the A00 function see Smart Task ba...

Страница 46: ...en using the external input via pin 2 this must be configured accordingly section 9 6 Table 16 Smart Tasks Logic ISDU Name Data type Data storage Length Access Default value Value Range Index Subin de...

Страница 47: ...ollowing graphic for details on how the different modes work t t t t t t t t t t t t t t t t t Input signal Timer 1 Timer 2 DEACTIVATED Output signal Timer 1 Timer 2 T ON DELAY Output signal Timer 1 T...

Страница 48: ...t reset 9 9 System wide commands Index 2 Index 2 can be used to execute commands across domains Restore factory settings value 130 To use the sensor e g in another application the factory settings can...

Страница 49: ...ts 8 freely configurable alarm bits group and direct alarms 19 Alarm bits 8 freely configurable alarm bits group and direct alarms 10 1 Byte 0 to 15 The first 4 values or 16 bytes can be freely assign...

Страница 50: ...responds to the state of a specific alarm or an OR operation of a few alarm bits The available direct alarms are Operating hours Maximum operating hours active if the bit is set in Index 4370 Subindex...

Страница 51: ...lue 0 Value 1 Value 2 Value 3 a RMS profile a RMS X axis a RMS Y axis a RMS Z axis Temperature v RMS profile v RMS X axis v RMS Y axis v RMS Z axis Temperature X axis profile a RMS X axis v RMS X axis...

Страница 52: ...d in the sin gle axis operating mode Configuration for multi axis operation Teach in is not performed The sensor is in manual trig ger operating mode and is not receiving a trigger No new data blocks...

Страница 53: ...n the sensor surfaces Check the fittings and plug connectors No modifications may be made to devices Subject to change without notice Specified product properties and technical data are not written gu...

Страница 54: ...ies electrical and electronic devices In accordance with international regulations batteries rechargeable batteries and electrical and electronic devices must not be disposed of with household waste T...

Страница 55: ...5 g Reverse polarity protection Yes Short circuit protection Yes Ambient temperature operation 40 C 80 C Vibration Number of axes 3 Measuring range 8 g Measurement error 6 Measuring range a RMS 0 g 5...

Страница 56: ...300 1 10 0 39 28 1 1 28 1 1 6 0 24 M12 x 1 40 50 1 57 1 97 2 Pin 1 Pin 3 Pin 4 Pin 2 1 M3 threaded mounting hole 2 Connection 14 TECHNICAL DATA 56 O P E R A T I N G I N S T R U C T I O N S MPB10 80280...

Страница 57: ...rrent operating instructions for the product at www sick com To do so enter the product part number in the search field part number see the entry in the P N or Ident no field on the type label ANNEX 1...

Страница 58: ...ew block 12 4483 4485 a RMS 16 32 4483 4485 v RMS 32 4483 4539 Vibration in time range 16 4486 4488 v RMS 16 4489 4491 Variance 16 34 4491 4494 Skewness 17 4492 4494 Skewness 34 4495 4497 Kurtosis 17...

Страница 59: ...ANNEX 15 8028041 2022 08 16 SICK O P E R A T I N G I N S T R U C T I O N S MPB10 59 Subject to change without notice...

Страница 60: ...o Phone 52 472 748 9451 E Mail mexico sick com Netherlands Phone 31 0 30 229 25 44 E Mail info sick nl New Zealand Phone 64 9 415 0459 0800 222 278 tollfree E Mail sales sick co nz Norway Phone 47 67...

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