High Temperature Velocity and Acceleration Sensor

Transcription

1 359 High Temperature Velocity and Acceleration Sensor Bently Nevada* Asset Condition Monitoring Description The 359 High Temperature Velocity and Acceleration Sensor (HTVAS) provides a continuous acceleration and velocity output, allowing the customer to protect their machine with an velocity signal while simultaneously capturing the acceleration signal for machinery diagnostics. Its design is primarily for use with the 35/42M and 35/44M monitors. When attaching the HTVAS to a 35/42M or 35/44M monitor you must use the acceleration and velocity signals from the transducer on a separate channel pair (such as channels 1 and 3) or on separate monitors. The 359 High Temperature Velocity and Acceleration Sensor (HTVAS) separates the high-temperature sensing element from the signal conditioning electronics, with the two permanently connected via a hardline cable. This arrangement allows you to mount the sensing head on surfaces with temperatures as high as 482 C ( 9 F), while installing the signal conditioning electronics in a cooler location. Eliminating connections between the sensing head and its associated signal conditioning electronics also eliminates a significant source of potential transducer failures (connector problems). This achieves overall transducer system performance comparable to other case-mounted vibration transducers, but permits use at significantly higher temperatures. The main features of the 359 HTVAS are as follows: Velocity and acceleration output High temperature operation up to +482 C (+9 F) Electronics rated to +125 C (+257 F), survivable to +155 C (+311 F) Application Advisory If housing measurements are being made for overall protection of the machine, give thought to the usefulness of the measurement for each application. Most common machine malfunctions (imbalance, misalignment, etc.) originate at the rotor and cause an increase (or at least a change) in rotor vibration. For any housing measurement alone to be effective for overall machine protection, the machine must faithfully transmit a significant amount of rotor vibration to the bearing housing or machine casing, or more specifically, to the mounting location of the transducer. In addition, exercise care in the physical installation of the transducer. Improper installation can degrade the transducer s performance, and/or generate signals which do not represent actual machine vibration. Upon request, we can provide engineering services to determine the suitability of housing measurements for the machine in question and/or to provide installation assistance. Page 1 of 7

2 Specifications Specifications are between +2 C and +3 C (+68 F to +86 F) with machine casing vibration at 1 Hz (6 cpm) and with a 1 k load unless otherwise indicated. Electrical Power Requirements Input Voltage System Sensitivity over Extended Temperatures of 54 C to +399 C (-65 F to +75 F) and with the electronics between 54 C to +125 C (-65 F to +257 F), the output remains within ± 1% of 3.94 mv/mm/s (1 mv/in/s). Quiescent Current Transverse Sensitivity Amplitude Linearity -18 to -3 Vdc; -18 to 28 Vdc for hazardous area approval options. 6 ma nominal, no load. Less than 5% of axial sensitivity. Output Bias Voltage Velocity Range of 54 C to +482 C (-65 F to +9 F) and with the electronics between 54 C to +125 C (-65 F to +257 F), the output remains within ± 15% of 3.94 mv/mm/s (1 mv/in/s) Vdc. Mounted Resonant Frequency Maximum Cable Length Grounding Velocity Output Sensitivity Frequency Response 1% to 49 m/s 2 (5 g) peak overall acceleration. Greater than 15 khz. 35 metres (1 ft). Case isolated mv/mm/s (1 mv/in/s) ±5%. Broadband Noise Floor (5 Hz to 2 khz) Acceleration Output Sensitivity Frequency Response 127 mm/s (5 in/s)..5 mm/s rms (.2 in/s rms), max. 1.2 mv/m/s 2 (1 mv/g) ± 5%. 25 Hz to 4 khz (15 cpm to 24 kcpm) 5% with 35 metres (1 ft) of cable. 1 Hz to 1 khz (6 cpm to 6 kcpm) 3 db with 35 metres (1 ft) of cable. 4 Hz to 1 khz (24 cpm to 6 kcpm) 5% with 35 metres (1 ft) of cable. 25 Hz to 2 khz (15 cpm to 12 kcpm) 3 db with 35 metres (1 ft) of cable. System Sensitivity over Extended Temperatures of -54 C to +399 C (-65 F to +75 F) and with the electronics Page 2 of 7

3 between 54 C to +125 C (-65 F to +257 F), the output remains within ± 1% of 1.2 mv/m/s2 (1 mv/g). ATEX II 1 G Ex ia IIC T4 Output Bias Voltage Acceleration Range Broadband Noise Floor (5 Hz to 2 khz) of 54 C to +482 C (-65 F to +9 F) and with the electronics between 54 C to +125 C (-65 F to +257 F), the output remains within ± 15% of 1.2 mv/m/s2 (1 mv/g) Vdc. 49 m/s 2 (5 g). Hazardous Area Classification CSA/NRTL/C 147 mm/s 2 (1.5 mg) rms, max. For a detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (document 18M1756) located at the following website: Multiple approvals for hazardous areas certified by Canadian Standards Association in North America and by LCIE in Europe. Ex ia/aex ia for Class I Zone IIC Ta = 1ºC or Class I, Division 1, Groups A, B, C, and D; Class II, Division 1, Groups E, F, and G; and Class III, Division 1, when installed with an approved zener barrier per BN drawing Ex nl IIC Class 1, Zone 2 Ta = -4ºC - 1ºC II 3 G Ex nl IIC T4 Electromagnetic Compatibility (CE Mark) EMC European Community Directives EMC Directive 24/18/EC Standards: EN 61326, Electrical Equipment for Measurement, Control, and Laboratory Use, EMC Requirements. CISPR 11, Radiated Emissions EN , Electro-Static Discharge EN , Radiated Immunity EN , Electrical Fast Transient EN , Surge Explosive Atmospheres European Community Directives: ATEX 1994/9/EC Standards: EN 679- EN EN For further certification and approvals information please visit the following website: Environmental Limits Operating and Storage Temperatures Sensor Mineral Insulated Cable Electronics -54 C to +482 C (-65 F to +9 F). -54 C to +482 C (-65 F to +9 F). -54 C to +125 C (-65 F to +257 F). Class I, Division 2 (non-incendive), Groups A, B, C, and D when installed per BN drawing Page 3 of 7

4 Soak Back Temperature Shock Survivability The electronics will survive temperature exposure of +155 C (+311 F) for four hours without failure. Electrical performance will not be met during this period. Integral Electronics Dimensions See Figure 1. Mounting Patch panel hub mount. Material 3 series stainless steel. Relative Humidity 19,62 m/s 2 (2 g) peak, maximum. Connector MIL-DTL-83723/9-16N with gold-plated 3 series stainless steel. Physical Sensor Dimensions Mounting Mounting Surface Material Integral Cable Diameter Material Bend Radius 1% condensing, nonsubmerged. Case is hermetically sealed. See Figure mm (1.188 in) square mounting hole pattern, 7.2 mm (.283 in) mounting holes (4 holes). 32 microinch rms. Nickel alloy ± 1.27 mm (.25 ±.5 in) 3 Series Stainless Mineral Insulated Integral Cable with Stainless Steel Overbraid. Minimum bend radius of 51 mm (2. in). System Weight (without field wiring) Mounting Angle.545 kg +.1 kg/m cable length (1.2 lb +.6 lb/in cable length), typical. Any orientation Ordering Information For a detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (document 18M1756) located at the following website: High Temperature Velocity and Acceleration Sensor 359 AXXX A: Integral Cable Length Option inches (.58 metres) inches (.66 metres) inches (.69 metres) inches (1.12 metres) inches (1.96 metres) inches (2.11 metres) inches (4. metres) inches (6. metres) inches (8. metres) inches (1. metres) HTVAS Field Interconnect Cable 3591 AXXX A: Cable Length 1 1 ft (3.5 metres) 4 4 ft (12.2 metres) Page 4 of 7

5 1. Stainless steel overbraided MI cable diameter through (typical), 4 places 3. Length UNF-2A 5. MIL-DTL-83723/9 connector Figure 1: Transducer Dimensional Drawing Dimensions are in millimetres [inches] Page 5 of 7

6 Phase Error ( ) Sensitivity (db) Velocity Frequency Response Velocity Phase Error Figure 2: Typical Velocity Amplitude and Phase Response Page 6 of 7

7 Phase Error ( ) Sensitivity (db) Acceleration Frequency Response Acceleration Phase Error Figure 3: Typical Acceleration Amplitude and Phase Response * Denotes a trademark of Bently Nevada, Inc., a wholly owned subsidiary of General Electric Company Bently Nevada, Inc. All rights reserved. Printed in USA. Uncontrolled when transmitted electronically Bently Parkway South, Minden, Nevada USA Phone: Fax: Page 7 of 7