Instruction Manual
Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
Meißner Str. 58 - D-01445 Radebeul
Phone +49-351-836 2191 Fax +49-351-836 2940
Email:
[email protected]
Internet:
www.MMF.de
Charge / IEPE
Conditioners
M72 Series
Page 1: ...nual Manfred Weber Metra Mess und Frequenztechnik in Radebeul e K Mei ner Str 58 D 01445 Radebeul Phone 49 351 836 2191 Fax 49 351 836 2940 Email Info MMF de Internet www MMF de Charge IEPE Conditione...
Page 2: ...The latest version of this document can be downloaded from http www mmf de product_literature htm Manfred Weber Metra Mess und Frequenztechnik in Radebeul e K Jan 17...
Page 3: ...ff the IEPE Power Supply 8 5 Amplifier 8 6 Transducer Sensitivity M72Ax M72S1 9 7 Level Indicators 10 8 Filters and Integrators 10 8 1 Low Pass Filter 10 8 2 High Pass Filter 11 8 3 Integrators 11 9 K...
Page 4: ...The letter x in this manual stands for the channel number of the versions M72A1 M72B1 M72A3 and M72B3 2 Figure 1 M72A1 front panel Figure 2 M72A1 rear panel...
Page 5: ...oners provide the following functions Adaptation of the sensor signal and sensor supply Amplification High and low pass filtering for example anti aliasing filter Integration of the sensor signal for...
Page 6: ...o measure velocity and displacement re spectively A second amplification level follows subsequently Due to the distributed amplification before and after the filter there is an overload reserve which...
Page 7: ...nel measuring systems In most cases you will find a superimposed 50 60 Hz or 100 120 Hz voltage on the measuring signal One reason for this effect may be that the transducers are ground referenced not...
Page 8: ...ower supply 4 1 Charge Input Capacitive signal sources usually piezoelectric sensors with charge output are connected to the charge input The input stage is a capacitive feedback amplifier which trans...
Page 9: ...current must be fed into the measuring line and simultaneously separated from the subsequent amplifier stages The flow of constant current into the sensor it is indicated by the permanently lit white...
Page 10: ...100 1000 mV pC IEPE mode 1 10 100 1000 times or 0 20 40 and 60 dB The gain can be selected using buttons Gain and Gain After switching the input the lowest amplification is automatically configured Af...
Page 11: ...he sensitivity is read automatically and appears briefly on the display The most recently entered sensitivity can be viewed at any time by a short press of or It is also saved when the instrument is s...
Page 12: ...nds For display values of over 80 the gain should be decreased and for under 6 it should be increased to yield an undistorted low noise signal 8 Filters and Integrators 8 1 Low Pass Filter To eliminat...
Page 13: ...o tating machinery Single integration of vibration acceleration generates velocity whereas double integration generates displacement The HP Integrator button activates the integrators Single integrati...
Page 14: ...litudes due to their damping behavior As a result of this the modulation declines as does the signal to noise ratio As a guide value single integration should only be applied to frequencies up to 1000...
Page 15: ...rface see Chap ter 11 10 Function Check and Calibration We recommend calibrating your instrument at two year intervals Inside the housing there are no calibration points All configuration is carried o...
Page 16: ...l functions of the amplifier modules are controlled via the USB port at the rear of the rack enclosure The power supply socket is also located at the rear side of the rack enclosures It is a circular...
Page 17: ...s located on the internet site http www mmf de software_download htm m72 Unzip and save both of the enclosed files to a directory on your computer This directory will need to be entered when windows a...
Page 18: ...meters n CR Send example B1BMEASURING POINT NO 1 RMD set default parameters command acknowledgment a CR RME save all settings to non volatile memory from version 001 005 command acknowledgment a CR RM...
Page 19: ...t invalid parameters n CR Send example 00S101 2 RMX read settings Answer aaaaa hhh vvv a device type M72R1 or M72S1 nnnnnnnnnnnnnnnnnnnn h hardware version 3 numbers IiGgHhLlSsssss v software version...
Page 20: ...nder Programs Metra Radebeul on VS1x The pro gram window opens as shown in Figure 11 The rack case M72R8 or M72S8 should now be connected to the PC and the device driver in stalled as described in sec...
Page 21: ...column by OK Invalid entries are indicated as ERROR Please note that settings transferred via the digital interface are not stored in the non volatile memory of the M72 modules This means that the M72...
Page 22: ...at modulation 10 of the full scale value at the center of the frequency band Low Pass Filter 3dB 0 1 1 10 50 kHz 4 pole Butterworth damping 75 dB decade High Pass Filter 3 dB 3 Hz 2 pole Butterworth 4...
Page 23: ...egment LED display Power Supply 7 to 28 VDC 250 60 mA per channel plug connection DIN 45323 Mains Plug Adapter Input range 100 240 VAC 50 60 Hz with 2 pole plug available types EU standard or AU UK US...
Page 24: ...rranty 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 replac...
