330500-00-02傳感器
說明應用
這些加速度計適用于需要外殼加速度測量的關鍵機械應用，如齒輪嚙合監測。330400旨在滿足美國石油學會標準670對加速度計的要求。它提供50g峰值的振幅范圍和100mV/g的靈敏度。330425是相同的，只是它提供了更大的振幅范圍（75g峰值）和25mV/g的靈敏度。如果為了機器的整體保護而進行外殼測量，則應考慮測量對每個應用的有用性。最常見的機器故障（不平衡、未對準等）源于轉子，并導致轉子振動增加（或至少發生變化）。為了使任何外殼測量單獨對整個機器保護有效，大量的轉子振動必須忠實地傳遞到軸承外殼或機殼，或更具體地說，傳遞到傳感器的安裝位置。此外，在傳感器的物理安裝過程中應小心。安裝不當可能導致傳感器性能下降，和/或產生不代表實際機器振動的信號。輸出與速度的積分可能會使情況惡化。如果積分到速度，應格外小心。對于高質量的速度測量，應使用330500 Velomitor傳感器。根據要求，我們可以提供工程服務，以確定有關機器的外殼測量的適當性和/或提供安裝幫助。330400和330425加速計加速度傳感器數據表B規格參數規定為+20至+30°C（+68至+86°F）和100 Hz，除非另有說明。超出規定限值的操作可能導致錯誤讀數或機器監控丟失。電氣330400靈敏度10.2 mV/m/s2（100 mV/g）±5%。加速度范圍490 m/s2（50 g），10 Hz至15 kHz頻率范圍內的峰值總加速度。頻率高于15 kHz時的振動，尤其是換能器共振時的振動將顯著降低該范圍。
振幅線性度
±1%至490 m/s2（50 g）峰值。寬帶噪聲本底（10 Hz至15 kHz）0.039 m/s2（0.004 g）rms。330425靈敏度2.5 mV/m/s2（25 mV/g）±5%。加速度范圍：10 Hz至15 kHz頻率范圍內的735 m/s2（75 g）峰值總加速度。頻率高于15 kHz的振動，尤其是換能器共振時的振動，將顯著降低該范圍。振幅線性度±1%至735 m/s2（75 g）峰值。寬帶噪聲本底（10 Hz至15 kHz）0.098 m/s2（0.01 g）rms。兩臺機組的頻率響應均為10 Hz至15 kHz（600 cpm至900000 cpm）±3dB；30 Hz至10 kHz（1800 cpm至600000 cpm）±10%溫度靈敏度-工作溫度范圍內典型的11%至+3%。橫向靈敏度小于軸向的5%。安裝諧振頻率大于30 kHz。共振峰值振幅最大為20 dB。基礎應變靈敏度對于字母“G”前面的序列號（包括所有新傳感器49 mm/s2/mstrain（0.005 G/mstrain）對于字母“G”前面的系列號（2004年4月之前裝運）980 mm/s2/ms train（0.100 G/mstrain；4.9 mm/s2/mstrain（0.0005 g/mstrain），安裝底座（API適配器）與加速計一起提供。Bently Nevada建議與安裝底座一起安裝，以最大限度地降低序列號前沒有字母“G”的底座應變敏感性。最大電纜長度305米（1000英尺），信號無退化。電源要求輸入電壓-24±0.5 Vdc。偏置電流2 mA標稱值。輸出偏置電壓：-8.5±0.5 Vdc。接地外殼已隔離。
Explain the application
These accelerometers are suitable for critical mechanical applications that require enclosure acceleration measurement, such as gear engagement monitoring. The 330400 is designed to meet the requirements of American Petroleum Institute Standard 670 for accelerometers. It provides an amplitude range of 50g peak value and a sensitivity of 100mV/g. 330425 is the same, but it provides a larger amplitude range (75g peak) and a sensitivity of 25mV/g. If enclosure measurements are made for the overall protection of the machine, the usefulness of the measurements for each application should be considered. The most common machine failures (unbalance, misalignment, etc.) originate in the rotor and cause an increase (or at least a change) in rotor vibration. In order for any enclosure measurement to be effective for the protection of the whole machine alone, a large amount of rotor vibration must be faithfully transmitted to the bearing housing or enclosure, or more specifically, to the installation position of the sensor. In addition, care should be taken during the physical installation of the sensor. Improper installation may result in poor sensor performance and/or generate signals that do not represent actual machine vibration. The integration of output and speed may make the situation worse. Take extra care if integrating to speed. For high quality speed measurements, use a 330500 Velomitor sensor. On request, we can provide engineering services to determine the appropriateness of the enclosure measurements for the machine concerned and/or to provide installation assistance. The 330400 and 330425 accelerometer accelerometer data sheet B specifications are specified as+20 to+30 ° C (+68 to+86 ° F) and 100 Hz, unless otherwise noted. Operation beyond the specified limits may result in incorrect readings or loss of machine monitoring. Electrical 330400 sensitivity 10.2 mV/m/s2 (100 mV/g) ± 5%. Acceleration range 490 m/s2 (50 g), total peak acceleration in the frequency range of 10 Hz to 15 kHz. Vibration at frequencies above 15 kHz, especially when the transducer is resonant, will significantly reduce this range.
Amplitude linearity
± 1% to 490 m/s2 (50 g) peak. Broadband noise background (10 Hz to 15 kHz) 0.039 m/s2 (0.004 g) rms. 330425 sensitivity 2.5 mV/m/s2 (25 mV/g) ± 5%. Acceleration range: 735 m/s2 (75 g) peak total acceleration in the frequency range of 10 Hz to 15 kHz. Vibration with a frequency higher than 15 kHz, especially when the transducer is resonant, will significantly reduce this range. Amplitude linearity ± 1% to 735 m/s2 (75 g) peak. Broadband noise background (10 Hz to 15 kHz) 0.098 m/s2 (0.01 g) rms. The frequency response of both units is 10 Hz to 15 kHz (600 cpm to 900000 cpm) ± 3dB; 30 Hz to 10 kHz (1800 cpm to 600000 cpm) ± 10% temperature sensitivity - typical 11% to+3% in the operating temperature range. The transverse sensitivity is less than 5% of the axial sensitivity. The installation resonant frequency is greater than 30 kHz. The maximum resonant peak amplitude is 20 dB. The foundation strain sensitivity is 980 mm/s2/ms train (0.100 G/mstrain; 4.9 mm/s2/mstrain (0.0005 g/mstrain) for the serial number before the letter "G" (including all new sensors 49 mm/s2/mstrain (0.005 G/mstrain) for the serial number before the letter "G" (shipped before April 2004). The mounting base (API adapter) is provided with the accelerometer. Bently Nevada recommends installing with the mounting base to minimize the strain sensitivity of the base without the letter "G" before the serial number. The maximum cable length is 305 meters (1000 feet), and the signal has no degradation. The power supply requires an input voltage of - 24 ± 0.5 Vdc. Bias current 2 mA nominal. Output bias voltage: - 8.5 ± 0.5 Vdc. The grounded enclosure has been isolated.
