PCB Piezotronics IMI SENSORS 627A71, Installation And Operating Manual

Page 1: ...l Accelerometer Installation and Operating Manual For assistance with the operation of this product contact PCB Piezotronics Inc Toll free 800 959 4464 24 hour SensorLine 716 684 0001 Fax 716 684 3823 E mail imi pcb com Web www imi sensors com ...

Page 2: ...ialized tests including sensitivity at elevated or cryogenic temperatures phase response extended high or low frequency response extended range leak testing hydrostatic pressure testing and others For more information contact your local PCB Piezotronics distributor sales representative or factory customer service representative Returning Equipment If factory repair is required our representatives ...

Page 3: ...ation on particular operating steps The following symbols may be found on the equipment described in this manual This symbol on the unit indicates that high voltage may be present Use standard safety precautions to avoid personal contact with this voltage This symbol on the unit indicates that the user should refer to the operating instructions located in the manual This symbol indicates safety ea...

Page 4: ...E 住房 O O O O O O PCB板 X O O O O O 电气连接器 O O O O O O 压电晶体 X O O O O O 环氧 O O O O O O 铁氟龙 O O O O O O 电子 O O O O O O 厚膜基板 O O X O O O 电线 O O O O O O 电缆 X O O O O O 塑料 O O O O O O 焊接 X O O O O O 铜合金 黄铜 X O O O O O 本表格依据 SJ T 11364 的规定编制 O 表示该有害物质在该部件所有均质材料中的含量均在 GB T 26572 规定的限量要求以下 X 表示该有害物质至少在该部件的某一均质材料中的含量超出 GB T 26572 规定的限量要求 铅是欧洲RoHS指令2011 65 EU附件三和附件四目前由于允许的豁免 CHINA RoHS COMPLIANCE ...

Page 5: ... O Wires O O O O O O Cables X O O O O O Plastic O O O O O O Solder X O O O O O Copper Alloy Brass X O O O O O This table is prepared in accordance with the provisions of SJ T 11364 O Indicates that said hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement of GB T 26572 X Indicates that said hazardous substance contained in at least one of t...

Page 6: ...ION A ECN NUMBER 49766 Operating Guide with Enclosed Warranty Information 3424 Walden Avenue Depew New York 14043 2495 Phone 716 684 0003 Fax 716 684 3823 Toll Free Line 1 800 959 4IMI Piezoelectric ICP Accelerometers Operating Guide ...

Page 7: ...pply low frequency and high frequency measurements Shear design sensors are preferred because of their inherent insensitivity to adverse environmental influences such as case or base strain and thermal transients Internal case isolation and shielding is important in avoiding erroneous signals resulting from ground loops and pick up of electromagnetic and radio frequency interference Other critical...

Page 8: ...ower gain which is extremely close to unity and independent of input voltage Also the diode can be changed to supply higher currents for driving long cable lengths Constant current diodes as shown in Figure 3 should be used in ICP signal conditioners The correct orientation of the diode within the circuit is critical for proper operation Except for special models standard ICP sensors require a min...

Page 9: ...onics However when operating AC coupled signal conditioners with readout devices having an input impedance of less than one megaohm thelow frequencyrangemaybeaffected 4 1 STANDARD STUD MOUNT This mounting technique requires smooth flat contact surfaces for proper operation and is recommended for permanent and or secure installations Stud mounting is also recommended when testing at high frequencie...

Page 10: ...nderside of the mounting base Firmly press down on the assembly to displace any extra adhesive remaining under the base See Figure7 METHOD 2 Direct Adhesive Mount For restrictions of space or for convenience most sensors with the exception of integral stud models can be adhesive mounteddirectlytothe machine surface STEP 1 Prepare a smooth flat mounting surface A minimum surface finish of 63 µin 0 ...

Page 11: ...ic interference or radio frequency interference EMI or RFI To avoid ground loops thereshouldonlybeonegroundin the system It is recommended for permanent installations that the sensor becase isolatedand internally shielded witha dual case design and use a two conductor shielded cable to insure clean vibration signal transmission Two conductor shielded cables allow the signal and the signal return c...

Page 12: ...er rate Also any current not used by the cable goes directly to power the internal electronicsandwillcreateheat Thismaycausethesensorto exceed its maximum temperature specification For this reason donotsupplyexcessivecurrentovershortcableruns orwhentestingatelevatedtemperatures 5 1CABLECONNECTORPROCEDURE Care and attention to installation is essential as the reliabilityandaccuracy of your system i...

Page 13: ...ner the meter or LED and allow the sensor to power up If a faulty condition is monitored first check all system connections then check the functionality of the cable and signal conditioner If the system still does not operate properly consult an IMI Application Engineer Note Always operate the accelerometer within the limitations listed on the Specification Sheet of your sensor Operating the devic...

Page 14: ...former MIL STD 45662A and uses equipment directly traceable to NIST This assures an accurate calibration of relevant specifications The following includes a broad overview of the Back to Back Calibration technique normally used when calibrating accelerometers This technique provides a quick and easy method for determining the sensitivity of a test accelerometer over a wide frequency range 8 2 BACK...

Page 15: ...mA of constant current to extend battery life while continuous monitoring systems offer more current in order to drive longer cables Figure 16 shows a typical system for a sensor with integral electronics The signal output of a sensor with integral electronics is a low impedance voltage signal proportional to the dynamic measurement such as force pressure or vibration This voltage signal is carrie...

Page 16: ...ceive assistance via e mail at imi pcb com or visit our website at www pcb com 11 0 CUSTOMER SERVICE WARRANTY IMI a division of PCB Piezotronics guarantees Total Customer Satisfaction If at any time for any reason you are not completely satisfied with any IMI product IMI will repair replace or exchange it at no charge You may also choose to have your purchase price refunded IMI instrumentation is ...

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