3300 RAM and NSv Proximity Transducer System

Transcription

1 33 RAM and NSv Proximity Transducer System Description The 33 RAM and NSv Proximity Transducer system is intended for centrifugal air compressors, refrigeration compressors, process gas compressors and other machines with tight installation requirements. It consists of a 33 RAM (Robust Air Machine) Proximitor Sensor, a 33 NSv (Narrow Side view) probe and a 33 NSv extension cable. The 33 RAM and NSv Proximity Transducer System replace our previous 3- series transducer system using fiberglass-tipped 19 probes. The primary uses for this transducer system are for areas where either counterbore, side view or rearview restrictions limit the use of our standard 33 and 33 XL Transducer Systems. It is also ideal for small target applications, such as when measuring radial vibration on shafts smaller than 51 mm (2 in) or axial position on flat targets smaller than 15 mm (.6 in). When replacing the 3-series 19 transducer system, all components of the transducer system (Proximitor Sensor, probe and extension cable) must be replaced. 33 NSv Probe and Extension Cable The 33 NSv probe and extension cable are mechanically and electrically compatible and interchangeable with our previous 33 RAM proximity probe and extension cable. The 33 NSv probe has increased chemical resistance, making it as robust as our 33 5 mm probe. This enables it to be used in many process chemical compressors. The 33 NSv probe also has superior side-view characteristics compared to the 3-series 19 probe when gapping the 33 NSv probe at the same distance from the probe target. See graph 3 for recommended gap settings as the counterbore decreases below the recommended counterbore size. The 33 NSv probe also incorporates many of the latest proximity probe features. It uses a polyphenylene sulfide (PPS) probe tip that is threaded into a stainless steel probe case. Our patented TipLoc TM molding method prevents the PPS probe tip from twisting and vibrating loose. Standard probe thread sizes include M8x1, M1x1, 1/4-28 UNF and 3/8-24 UNF threads. The 33 NSv probe and extension cable use 75 Ω coaxial cable, which is stronger than the 5 Ω cable used on the 19 probe. Our patented CableLoc TM design provides 22 N (5 pounds) pull strength where the cable attaches to the probe tip. The 33 NSv probe and extension cable have self-locking, gold-plated brass ClickLoc TM connectors which "click" when tightened. ClickLoc connectors allow you to tighten the connection without using tools. They lock in place when tightened, preventing intermittent signals caused by loose connectors. Part Number Rev. B (6/7) Page 1 of 16

2 33 RAM Proximitor Sensor The 33 RAM Proximitor Sensor is a highly temperaturestable proximity transducer system. It has a scale factor of 2 mv/mil, which is the most common output for eddy current transducers. Because of its enhanced sideview and small target characteristics, it has a shorter linear range than our standard transducer systems. With 6 mils of linear range, it exceeds the linear range of the 3-series transducer system. Electrical isolation of the Proximitor Sensor case is a standard feature that eliminates the need for Proximitor isolation kits required on our previous 3-series proximity transducer systems. For field wiring, a threeconductor shielded triad cable is recommended to ensure superior performance when connecting to our monitors and diagnostic equipment. Specifications Unless otherwise noted, the following specifications are for a 33 RAM Proximity Transducer System between 18 C and 27 C (64 F to 8 F) with a -24 Vdc power supply, a 1 kω load and a GE supplied AISI 414 steel target. Electrical Input: Power: Supply Sensitivity: Output resistance: Probe dc resistance (nominal) (RPROBE) Accepts one noncontacting 33 NSv or 33 RAM Proximity Probe and Extension Cable to -26 Vdc without barriers, -23 to -26 Vdc with barriers at 12 ma maximum consumption. Operation at a more positive voltage than Vdc can result in reduced linear range. Less than 2 mv change in output voltage per volt change in input voltage. 5 Ω Extension cable dc resistance (nominal) Center conductor (RCORE): Shield conductor (RJACKET): Extension cable capacitance: Field wiring: Linear Range: Recommended Gap Setting: Incremental Scale Factor: 1. m probe: 4.2 ±.5 Ω 5. m probe: 5.3 ±.7 Ω 7. m probe: 5.9 ±.9 Ω.222 Ω/m (.67 Ω/ft).66 Ω/m (.2 Ω/ft) 69.9 pf/m (21.3 pf/ft) typical Recommend using three-conductor shielded triad cable. Maximum length of 35 metres (1, feet) between the 33 RAM Proximitor Sensor and the monitor. See the frequency response graph in the 33 RAM manual (p/n ) for signal rolloff at high frequencies when using longer field wiring lengths. 1.5 mm (6 mils). Linear range begins at approximately.25 mm (1 mils) from target and is from.25 to 1.8 mm (1 to 7 mils)..89 mm (35 mils) 7.87 mv/µm (2 mv/mil) ± 9.5% worst case including interchangeability errors when measured in increments of.25 mm (1 mils) over the linear range..5 m probe: 4. ±.5 Ω

3 Deviation from best fit straight line (DSL): Performance over extended temperatures: Frequency Response: Target Size (flat target) Minimum: Recommended minimum: Shaft Diameter Minimum (standard X-Y probe configuration): Minimum (X-Y proximity probes offset axially by 23 mm (.9 in): Less than ±58µm (±2.3 mil) Incremental scale factor remains within +14/-19% worst case of 7.87 mv/µm (2 mv/mil) over probe temperature range of C to +177 C (+32 F to +35 F). to 1 khz: +, -3dB, with up to 35 m (1 ft) of field wiring. 8.9 mm (.35 in) 13 mm (.5 in) diameter Axial position measurements on shaft diameters smaller 13 mm (.5 in) will generally result in a change in scale factor. Reducing the gap between the probe and target will help limit the change in scale factor. See graph 4 for additional information. 3 mm (1.2 in) 2 mm (.8 in) Measurements on shaft diameters smaller than 3 mm (1.2 in) usually require close spacing of radial vibration or axial position transducers with the potential for their electromagnetic emitted fields to interact with one another (cross-talk), resulting in erroneous readings. To prevent cross-talk, maintain minimum separation of transducer tips of at least 25 mm (1. inches) for axial position measurements or 23 mm (.9 in) for radial vibration measurements. Radial vibration or position measurements on shaft diameters smaller than 2 mm (.8 in) will generally result in greater than a 1% change in average scale factor. See graph 5 for additional information. Counterbore Minimum: Recommended minimum: Electrical Classification: 9.5 mm (.375 in) 13 mm (.5 in) Hazardous Area Approvals: CSA/NRTL/C: Certification Number Counterbore smaller than 13 mm (.5 in) generally result in a change in scale factor at far gaps. Reducing the gap between the probe and the target will allow the transducer system to maintain its average scale factor over a reduced linear range. See graph 3 for additional information. Complies with the European CE mark. Class I Groups A, B, C & D Class II Groups E, F & G Class III Enclosure Type 4X LR EEx ia IIC II 1 G Ta = -35 C to +85 C Ta = -51 C to +1 C Part Number Rev. B (6/7) Page 3 of 16

4 Certification Number Mechanical Probe Tip Material: Probe Case Material: Probe Cable Specifications: Extension Cable Specifications: Cable Armor (optional): Tensile strength (maximum rated): Connector material: EEx na II II 3 G Ta = -35 C to +85 C Ta = -51 C to +1 C BAS99 ATEX 111 and 31U Polyphenylene sulfide (PPS). AISI 34 Stainless Steel (SST). 75 Ω coaxial, polytetrafluoroethylene (PTFE) insulated probe cable in the following total probe lengths:.5, 1, 5, or 7 metres. 75 Ω coaxial, polytetrafluoroethylene (PTFE) and fluoroethylene propylene (FEP) insulated. Flexible AISI 32 SST with FEP outer jacket. 22 N (5 lb) probe case to probe lead. 22 N (5 lb) at probe lead to extension cable connectors. 22 N (5 lb) probe case to stainless steel armor. Gold-plated brass. Probe case torque table 1/4-28 or M8x1 probes 3/8-24 or M1x1 probes 3/8-24 or M1x1 probes - first three threads Reverse mount probes Connector-toconnector torque Recommended torque: Maximum torque: Maximum Rated 7.3 N m (65 in lb) 33.9 N m (3 in lb) 22.6 N m (2 in lb) 22.6 N m (2 in lb) Connector Type Two gold ClickLocconnectors One stainless steel connector and one gold ClickLoc connector Minimum Cable Bend Radius: Total System Weight (typical): Probe: Extension Cable: Armored Extension cable: Proximitor Sensor: See table below.56 N m (5 in lb) 25.4 mm (1. in).56 kg (1.2 lb) 12 g (4.3 oz) 45 g/m (.5 oz/ft) 64 g/m (.7 oz/ft) Recommended 5.1 N m (45 in lb) 11.3 N m (1 in lb) 7.5 N m (66 in lb) 7.5 N m (66 in lb) Tightening Instructions Finger tight Finger tight plus 1/8 turn using pliers Part Number Rev. B (6/7) Page 4 of 16

5 Environmental Limits Probe Temperature Range Operating Temperature: Storage Temperature: Extension Cable Temperature Range Operating and Storage Temperature: 255 g (9. oz) -34 C to +177 C (-29 F to +351 F) -51 C to +177 C (-6 F to +351 F) -51 C to +177 C (-6 F to +351 F) Proximitor Sensor Temperature Range Operating Temperature: Storage Temperature: Relative Humidity: Probe Pressure: -51 C to +15 C (-6 F to +221 F) -51 C to +1 C (-6 F to +212 F) 1% condensing, non-submerged, with protection of coaxial connectors. 33 NSv probes are designed to seal differential pressure between the probe tip and case. The probe sealing material consists of a Viton O-ring. Probes are not pressure tested prior to shipment. Contact our custom design department if you require a test of the pressure seal for your application. Note: It is the responsibility of the customer or user to ensure that all liquids and gases are contained and safely controlled should leakage occur from a proximity probe. In addition, solutions with high or low ph values may erode the tip assembly of the probe causing media leakage into surrounding areas. Bently Nevada LLC will not be held responsible for any Patents: 5,16,343; 5,351,388 and 5,685,884 Ordering Information damages resulting from leaking 33 NSv proximity probes. In addition, 33 NSv proximity probes will not be replaced under the service plan due to probe leakage. Components or procedures described in the patents apply to this product. 33 NSv Probe, 1/4-28 UNF-2A, without armor 3391-AXX -BXX -CXX -DXX -EXX 33 NSv Probe, 1/4-28 UNF-2A, with armor 3392-AXX -BXX -CXX -DXX -EXX 33 NSv Probe, 3/8-24 UNF-2A, without armor 3398-AXX-BXX-CXX-DXX-EXX 33 NSv Probe, 3/8-24 UNF-2A, with armor 3399-AXX-BXX-CXX-DXX-EXX A: Unthreaded Length Option Note: Unthreaded length must be at least.7 inches less than the case length. Order in increments of.1 in Minimum unthreaded length: in Maximum unthreaded length: 9.2 in Example: 4 =.4 in B: Overall Case Length Option Order in increments of.1 in Minimum length:.8 in Maximum length: 9.9 in Example: 3 5 = 3.5 in C: Total Length Option 5.5 metre (2 in) 1 1. metre (39 in) 5 5. metres (16.4 ft) 7 7. metres (23. ft) D: Connector Option Connector not installed 2 Miniature ClickLoc coaxial connector E: Agency Approval Option Not required 5 Multiple Approvals 33 NSv Probe, M8 X 1, without armor 3393-AXX -BXX -CXX -DXX -EXX Part Number Rev. B (6/7) Page 5 of 16

6 33 NSv Probe, M8 X 1, with armor 3394-AXX -BXX -CXX -DXX -EXX 33 NSv Probe, M1 X 1, without armor 3395-AXX -BXX -CXX -DXX -EXX 33 NSv Probe, M1 X 1, with armor 3391-AXX-BXX-CXX-DXX-EXX A: Unthreaded Length Option Note: Unthreaded length must be at least 2 mm (.7 in) less than the case length. Order in increments of 1 mm Minimum unthreaded length: mm Maximum unthreaded length: 23 mm Example: 6 = 6 mm B: Overall Case Length Option Order in increments of 1 mm Minimum length: 2 mm Maximum length: 25 mm Example: 2 5 = 25 mm C: Total Length Option 5.5 metre (2 in) 1 1. metre (39 in) 5 5. metres (16.4 ft) 7 7. metres (23. ft) D: Connector Option Connector not installed 2 Miniature ClickLoc coaxial connector E: Agency Approval Option Not required 5 Multiple Approvals Proximitor Sensor 339-AXX-BXX A: Total Length Option 5 5. metres (16.4 feet) 7 7. metres (23. feet) B: Agency Approval Option Not required 5 Multiple Approvals Extension Cable 3393-AXXX-BXX-CXX Make sure that the extension cable length and the probe length, when added together, equal the Proximitor Sensor total length. A: Cable Length Option 4 4. metres (13.1 feet) metres (14.8 feet) 6 6. metres (19.7 feet) metres (21.3 feet) B: Armor Option Without stainless steel armor 1 With stainless steel armor with FEP jacket 2 With stainless steel armor, without FEP jacket. C: Agency Approval Option Not Required 5 Multiple Approvals Accessories NSv Reverse Mount Probe, 3/8-24 UNF threads CXX-DXX-EXX 33 NSv Reverse Mount Probe, M1 X 1 threads CXX-DXX-EXX C: Total Length Option 5.5 metre (2 in) 1 1. metre (39 in) 5 5. metres (16.4 ft) 7 7. metres (23. ft) D: Connector Option Connector not installed 2 Miniature ClickLoc coaxial connector E: Agency Approval Option Not required 5 Multiple Approvals Operation Manual Performance specification Bulk Cable (specify length in feet). 1. mm 2 (18 AWG), 3-conductor, twisted, shielded cable used between Proximitor Sensor and monitor. Bulk Cable (specify length in feet). 1. mm 2 (18 AWG), 3-conductor, twisted, shielded cable with drain wire used between Proximitor Sensor and monitor. Part Number Rev. B (6/7) Page 6 of 16

7 Aluminum probe mounting bracket AA A: Thread size Phenolic probe mounting bracket AXX A: Thread size / / M8 x 1 4 M1 x 1 Note: The aluminum probe mounting bracket is the standard mounting bracket for most probe installations. The -1 and -2 options are supplied with two 1-24 UNC-2A mounting screws. The -3 and -4 options are supplied with two M5 x.8-6g mounting screws. The mounting screws have pre-drilled holes for safety wire. 1 3/ / M8 x 1 4 M1 x 1 Note: The phenolic mounting bracket is recommended if additional electric isolation from the mounting location is required (as in some generator and electrical motor bearing locations). The -1 and -2 options are supplied with two 1-24 UNC-2A mounting screws. The -3 and -4 options are supplied with two M5 x.8-6g mounting screws. The mounting screws have pre-drilled holes for safety wire Proximitor Sensor Mounting Screws (spares). Package includes 4 each mounting screws. (Not needed if Bently Nevada Proximitor Housings are ordered.) 3/8-24 Probe Lock Nut with Safety Wire Holes. Single probe lock nut with two holes drilled through the nut in order to secure the lock nut in place with safety wire. M1 x 1 Probe Lock Nut with Safety Wire Holes. Single probe lock nut with two holes drilled through the nut in order to secure the lock nut in place with safety wire. ClickLoc Connector Kit. Used on 33 NSv probes and extension cables. Contains one set of male and female ClickLoc connectors, sleeves and one strip of silicone tape. Connector Crimp Tool Kit. Includes one set of 75 Ω ClickLoc inserts and connector installation instructions. Supplied with carrying cas Part Number Rev. B (6/7) Page 7 of 16

8 Dimensional Drawings Figure 1: 33 RAM Proximitorsensor, Part Number 339 Dimensions are in millimetres (inches) Figure 2: 33 NSv Proximity Probes, Standard Mount without Armor Part Numbers: 3391, ¼-28 UNF-2A 3393, M8 X 1 thread 3395, M1 X 1 thread 3398, 3/8-24 UNF-2A Figure 3: 33 NSv Probe English and Metric versions with Armored Cable Part Number Rev. B (6/7) Page 8 of 16

9 Part Number: 3392, 1/4-28 UNF-2A 3394, M8 x , 3/8-24 UNF-2A 3391, M1 x 1 Figure 4: 33 NSv Probe Reverse Mount versions Part Numbers: 3396, 3/8-24 UNF-2A 3397, M1 x 1 Figure 5: 33 NSv Extension Cable Part Number 3393 Notes: 1 All dimensions on figures are in millimetres (inches) unless otherwise noted. 2. Standard mount 1/4-28UNF-2A probes supplied with 7/16 inch lock nut and 7/32 wrench flats. Standard mount M8 X 1 probes supplied with 13 mm lock nut and 7 mm wrench flats. Standard mount 3/8-24 UNF-2A probes supplied with 9/16 inch lock nut and 5/16 wrench flats. Part Number Rev. B (6/7) Page 9 of 16

10 Standard mount M1 X 1 probes supplied with 17 mm lock nut and 8 mm wrench flats. 3. Reverse mount probes not available with armor option. 4. Letters inside quotation marks on figures refer to ordering options. 5. FEP jacket is standard on all non-armored probes. Part Number Rev. B (6/7) Page 1 of 16

11 Graphs 1 Gap (mm) DSL error (mils) DSL error (µ m) % 2% 1% ISF error % -1% -2% -3% -4% Output (Volts) Gap (Mils) 25 deg C (77 deg F) 67 deg C (153 deg F) 1 deg C (212 deg F) 177 deg C (351 deg F) -18 deg C ( deg F) -35 deg C (-31 deg F) Graph 1: 33 NSv Probe over temperature range Part Number Rev. B (6/7) Page 11 of 16

12 5 4 3 Gap (mm) DSL error (mils) DSL error (µ m) 15% 1% ISF Error 5% % -5% -1% -15% Output (Volts) Gap (Mils) 25 deg C deg C -34 deg C -51 deg C 7 deg C 1 deg C Graph 2: 33 RAM Proximitorsensor over temperature range Part Number Rev. B (6/7) Page 12 of 16

13 DSL error (mils) referenced to initial gap setting of 4 mils Gap (mm) DSL error (µ m) 2% 1% % ISF error -1% -2% -3% -4% Output (Volts) Gap (mils) No CB.5 in.4 in.375 in Graph 3: Effect of Counterbore Side Clearance (414 material) Part Number Rev. B (6/7) Page 13 of 16

14 DSL error (mils) referenced to initial gap setting of 4 mils Gap (mm) DSL error (µ m) 1% 5% ISF error % -5% -1% Output (Volts) Gap (mil) 1.2 in DIA.6 in DIA.5 in DIA.375 in DIA.35 in DIA Graph 4: Sensitivity to Small Flat Target Diameters Part Number Rev. B (6/7) Page 14 of 16

15 DSL error (mils) referenced to initial gap setting of 4 mils Gap (mm) DSL error (µ m) -6 2% % 1% ISF error 5% % -5% -1% -15% -2% Output (Volts) Gap (mils) 4. in DIA 2. in DIA 1. in DIA.5 in DIA.3 in DIA Graph 5: Sensitivity to Small Curved Target Diameters Part Number Rev. B (6/7) Page 15 of 16

16 Bently Nevada, TipLoc, Proximitor, NSv, and ClickLoc are trademarks of General Electric Company. Viton is a registered trademark of DuPont Dow Elastomers L.L.C. CSA is a registered trademark of Canadian Standards Association. Copyright 2 Bently Nevada LLC Bently Parkway South, Minden, Nevada USA Phone: Fax: All rights reserved. Part Number Rev. B (6/7) Page 16 of 16