Instruction Manual
Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
Meissner Str. 58 - D-01445 Radebeul
Tel. +49-351 836 2191 Fax +49-351 836 2940
Email:
[email protected]
Internet:
www.MMF.de
4-20 mA
Vibration Sensor
Type
KSI84xx
v1.32.034
Страница 1: ... Manfred Weber Metra Mess und Frequenztechnik in Radebeul e K Meissner Str 58 D 01445 Radebeul Tel 49 351 836 2191 Fax 49 351 836 2940 Email Info MMF de Internet www MMF de 4 20 mA Vibration Sensor Type KSI84xx v1 32 034 ...
Страница 2: ... update rate for PEAK measurement 0 5 s New sensor types KSI84D 3 300 xx for displacement measurement 13 06 2022 v1 32 034 Update rate at types KSI84AR 1k 10k xxx 62 5 ms Published by Manfred Weber Metra Mess und Frequenztechnik in Radebeul e K Meißner Str 58 D 01445 Radebeul Tel 0351 836 2191 Fax 0351 836 2940 Email Info MMF de Internet www MMF de Note The latest version of this document can be f...
Страница 3: ...set Current and Noise 11 4 5 4 Linear Measuring Range xmin xmax 12 4 5 5 Dynamic Range 12 4 6 Overload Display 13 4 7 Measurement Acquisition 13 4 7 1 Number of Averages N 13 4 7 2 Settling Time T 14 4 8 Total Accuracy 14 4 9 Error Messages 15 4 9 1 Steps to Fix a LOOP Error 15 5 Technical Data 16 5 1 Technical Characteristics of the 4 20mA transducer 16 5 2 Electrical Characteristics 16 5 3 Mecha...
Страница 4: ...16 ISO 20816 2 Measurement of bearing vibrations according to VDI 3832 3 Measurement of vibrations in defined frequency ranges The sensors are suitable for use in harsh environmental conditions The housing is double shielded electrically isolated and complies with protection grade IP68 2 Function The sensors of the KSI84xx family are piezoelectric vibration sensors A piezoelectric accelerometer is...
Страница 5: ...ration Velocity Displacement Mode M RMS PEAK RMS PEAK PEAK PEAK Furthermore the types differ in the measured frequency range HP LP and in their measuring range 3 1 Frequency Range HP LP The used frequency range of a sensor type is described by the values HP and LP in the type table HP is the 3 dB cutoff frequency of the high pass filter and determines the lower cutoff frequency of the sensor LP is...
Страница 6: ...e maximum current amplitude is only 1 of the measuring range 3 2 Measuring Range The Range value specified in the type table corresponds to the value of the measured quantity at which the sensor current is 20 mA At this value the sensor output is set to 100 The measurement result should always be within the linear measuring range of the sensor It ranges from 4 16 mA 1 to 22 mA 112 5 If 22 mA canno...
Страница 7: ...ISO 10816 1 gives some recommendations for suitable measuring points The KSI84xx is mounted via the M8 threaded hole in the sensor base The sensor can either be mounted directly using the M8 mounting stud type 043 or with the help of the mounting pad type 229 with M8 stud by epoxy cementing on the object Alternatively the senor can also be fixed by the magnetic base type 208 M8 or type 008 M5 in c...
Страница 8: ...ry Type 080G W Binder 713 female straight G or angled W with screw terminals for connection an existing sensor cable protection grade IP67 Type 082 B713G PIG x or type 082 B713G PIG x Shielded sensor cable x m length with Binder 713 female straight G or angled W and cable end sleeves protection grade IP67 Make sure that the cable is not routed alongside AC power lines and in adequate distance to p...
Страница 9: ...or cable with moulded plug connect shield toground on device side 4 3 Measuring the sensor current The following figures show possibilities to measure the sensor current The sensor current can be measured either directly by a current meter connected in series or indirectly by measuring the voltage drop across the load resistance RL between PIN 3 and the negative terminal Choose the connection show...
Страница 10: ...ts the maximum sensor current 22 mA1 and the offset current of 4 mA for a duration of 2 seconds These currents can be measured with an ampere meter to ensure proper function If there is no error the normal measuring operation starts afterwards in which the sensor current corresponds to the current measured value There is a LOOP error if the sensor is not able to drive 22 mA1 In this case the senso...
Страница 11: ...e measured quantity a v or d is determined from the sensor current as follows 𝒂 𝒗 𝒅 1 𝑩𝒊 𝒊𝑺𝒆𝒏𝒔𝒐𝒓 𝟒 𝒎𝑨 𝑅𝑎𝑛𝑔𝑒 16 𝑚𝐴 𝒊𝑺𝒆𝒏𝒔𝒐𝒓 𝟒 𝒎𝑨 4 5 3 Offset Current and Noise The offset current Ioff of the sensor is 4 mA This is the zero point in measuring mode The calibrated value is output while sensor elf test for control A slightly larger current value is measured when no vibration excitation is present the cu...
Страница 12: ... constant at 22 mA1 A sensor with a larger measuring range must be selected 4 5 5 Dynamic Range The dynamic range is the maximum peak amplitude value that can be processed without overdriving the signal processing It is shown in the following table for the acceleration or velocity signal and the different measuring ranges The following table contains the maximum acceptable peak value of the accele...
Страница 13: ...nge must be used 4 7 Measurement Acquisition The current output of the sensor is updated every 0 5 seconds The only exceptions are the types KSI84AR 1k 10k xx where the update rate is 62 5 ms The RMS measurement is based on all samples within this time window The PEAK measurement uses the samples from two consecutive time windows This results in a PEAK hold time of 1s 4 7 1 Number of Averages N To...
Страница 14: ...ation measurement laboratory Systematic errors caused by temperature are largely corrected by signal processing The following overview contains the most important error quantities to estimate the total accuracy of the sensor Error quantities Max Importance Basic accuracy of the nominal range 2 Accuracy of the sensor sine calibration at a certain amplitude and frequency at T 23 C Linearity 2 Additi...
Страница 15: ...remains in self test after restart follow steps 4 9 1 SENSOR Error Die Signalverarbeitung des Sensors arbeitet nicht normal Restart the sensor There is a SENSOR Error if the Sensor does not start with the self test The sensor constantly outputs 3 75 mA Replace sensor 22mA1 Overload OVL Vibration signal too high Use a sensor type with a higher measuring range Replace sensor 4 9 1 Steps to Fix a LOO...
Страница 16: ...ity Gain error Bix xmin xmax 23 C 2 Temperature coefficient of sensitivity TC Bi 0 015 K Max offsetdriftover temp Ioff Tmin Tmax 4 µA Max offset drift over time Ioff 5 000 h 1 µA Resolution noise see type table Transverse sensitivity G90max 5 5 2 Electrical Characteristics Current output IOUT 4 22 3 mA Loop supply voltage US 10 30 V Settling time 5 T fHP 1kHz RMS all types 0 125 5 s s Load resista...
Страница 17: ...20 20 KSI84AR 1 5k 20 0 020 50 KSI84AR 1 5k 50 0 030 100 KSI84AR 1 5k 100 0 060 200 KSI84AR 1 5k 200 0 080 500 KSI84AR 1 5k 500 0 160 10k 20 KSI84AR 1 10k 20 0 050 50 KSI84AR 1 10k 50 0 090 100 KSI84AR 1 10k 100 0 180 200 KSI84AR 1 10k 200 0 200 500 KSI84AR 1 10k 500 0 250 3 10 30 100 1001 300 1 1k 5 KSI84AR HP LP 5 0 005 10 KSI84AR HP LP 10 0 005 20 KSI84AR HP LP 20 0 005 50 KSI84AR HP LP 50 0 00...
Страница 18: ...84AP 1 10k 100 0 180 200 KSI84AP 1 10k 200 0 200 500 KSI84AP 1 10k 500 0 250 3 10 30 100 1001 300 1 1k 10 KSI84AP HP LP 10 0 005 20 KSI84AP HP LP 20 0 005 50 KSI84AP HP LP 50 0 007 100 KSI84AP HP LP 100 0 007 200 KSI84AP HP LP 200 0 008 500 KSI84AP HP LP 500 0 016 1k 10k 50 KSI84AP 1k 10k 50 0 090 100 KSI84AP 1k 10k 100 0 180 200 KSI84AP 1k 10k 200 0 200 500 KSI84AP 1k 10k 500 0 250 1 The conditio...
Страница 19: ...ements of ISO 2954 5 5 4 Velocity PEAK Q M HP Hz LP Hz Range mm s pk Type code Noise mm s pk v Peak 10 100 300 1k 20 KSI84VP 10 LP 20 0 010 25 4 KSI84VP 10 LP 25 40 KSI84VP 10 LP 40 50 8 KSI84VP 10 LP 50 30 300 1k 10 KSI84VP 30 LP 10 0 005 12 7 KSI84VP 30 LP 12 20 KSI84VP 30 LP 20 25 4 KSI84VP 30 LP 25 40 KSI84VP 30 LP 40 50 8 KSI84VP 30 LP 50 5 5 5 Displacement Q M HP Hz LP Hz Range mm pk pk Type...
Страница 20: ...20 5 6 Dimensions Measuring axis ...
Страница 21: ...lity under this warranty does not apply to any improper or inadequate maintenance or modification and operation outside the product s specifications Shipment to Metra will be paid by the customer The repaired or replaced product will be sent back at Metra s expense Declaration of Conformity According to EMC Directive 2014 30 EC Product Vibration Sensor Type KSI84xx It is hereby certified that the ...
