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Troubleshooting
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Summary of Contents for Siemens SITRANS WFS320
- Page 1 Sensing Heads SITRANS WFS320 Operating Instructions Edition 02/2016...
- Page 2 Introduction Safety notes SITRANS Description Installing/mounting Sensing Heads SITRANS WFS320 Connecting Commissioning Operating Instructions Service and maintenance Diagnosing and troubleshooting Technical Data Dimension drawings Appendix A 02/2016 A5E32880290-AB...
- Page 3 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.
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Page 4: Table Of Contents
The manual ..........................5 Safety notes ............................... 7 General safety instructions ....................... 7 Installation in hazardous areas ....................7 Description ............................... 11 SITRANS WFS320 ......................... 11 Principle of operation ......................11 Installing/mounting ........................... 13 Sensing head .......................... 13 Sensing plate .......................... 14 Viscous damper ........................ - Page 5 Input ............................40 Output ............................ 40 Operating conditions ......................40 Approvals ..........................41 Dimension drawings ..........................43 10.1 WFS320 sensing head outline and mounting ................ 43 Appendix A .............................. 45 WFS320 part identification diagram ..................45 SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 6: Introduction
This manual covers only sensing head installation, operation, and maintenance procedures. Flowmeter and integrator instruction manuals are available for download from our web site: Siemens weighing (http://www.siemens.com/weighing) Follow these operating instructions for quick, trouble-free installation, and maximum accuracy and reliability of your device. - Page 7 Introduction 1.1 The manual SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 8: Safety Notes
Installation in hazardous areas WARNING Equipment used in hazardous areas must be Ex-approved and marked accordingly. It is required that the special conditions for safe use provided in the manual and in the Ex certificate are followed. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 9 IIA, IIB, and IIC, and temperature classes T1, T2, T3, T4, T5, and T6 in zone 2 hazardous locations. 4. The equipment is certified for use as Category 2D equipment per FM14ATEX0027X. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 10 ● The enclosure is non-conducting and, under certain extreme conditions, may generate an ignition-capable level of electrostatic charges. The user shall ensure that the equipment is not installed in a location where it may be subjected to external conditions (such as high-pressure SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 11 This shall be considered when the WFS320 is being installed in locations that specifically require Equipment Protection Level Db. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 12: Description
Description SITRANS WFS320 SITRANS WFS320 sensing head is an out-of-process sensing element used for continuous in- line weighing of powdered or granular dry bulk solid materials. It is used with the 300 tph versions of SITRANS WF330 (general purpose), WF340 (vertical material drop), and WF350 (aerated gravity conveyor) dry solids flowmeters. - Page 13 Description 3.2 Principle of operation ① ③ Impact force Moving beam travel ② ④ LVDT Sensing plate SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 14: Installing/Mounting
Ensure that the structure used to support the base mount sensing head is capable of supporting the dynamic material impact forces as well as the static weight of the sensing head. ① ③ Spirit level Supporting/levelling bolts ② ④ Moving beam (machined surface) Rigid support SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 15: Sensing Plate
5. Tighten the right taper pin nut to lock the sensing plate shaft in place. 6. Tighten the left taper pin nut. ① ③ Taper pin (flat side down) Socket ② ④ Shaft Flat side up SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 16: Viscous Damper
The damper must be full and free of air bubbles, with the damper cover in the UP position, during flowmeter operation. ① ④ Filler bottle Damper cover ② ⑤ Filler plug Check that there are no bubbles ③ Shipping screws SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 17 Installing/mounting 4.3 Viscous damper SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 18: Connecting
● BLU = ORANGE ● GRN = YELLOW LVDT Integrator (Non-hazardous) (LVDT connection) ① ⑨ Green SIG- ② No connection Black ③ ⑧ Yellow ④ ⑦ Blue EXC- ⑤ ⑥ EXC+ Note Ground shield at Integrator only. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 19: Unit With Sensing Head Mounted Lvdt Conditioner Card
Not applicable to Hazardous-rated units. LVDT to SF500 Integrator LVDT to LVDT conditioner card connections are made by Siemens. *Where separation between the integrator and LVDT conditioner exceeds 150 m (500 ft): 1. Remove the jumpers from SF500 terminals 11/12 and 13/14. - Page 20 5.2 Unit with sensing head mounted LVDT conditioner card LVDT to SIWAREX FTC LVDT to LVDT conditioner card connections are made by Siemens. Connect the shield to the spring clamp shielding element that is mounted below the FTC. See ♦...
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Page 21: Unit With Remote-Located Lvdt Conditioner Card
– from SF500 terminal 12 to conditioner terminal block marked "Integrator EXC+" – from SF500 terminal 13 to conditioner terminal block marked "Integrator EXC-" For further connection information on specific LVDTs, consult Siemens. ** For Encapsulated LVDT (hazardous) • YEL = WHITE •... - Page 22 Shields are common, but not grounded to chassis. Run cable shields through SHLD terminals ♦ and ground at Integrator only. Note Ensure that the connection between TB-2 and TB-17 is made. Note Junction box included with hazardous-rated unit. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 23 ***The LVDT can be installed in a hazardous area, but all other components must be in a non- hazardous area. Connect the shield to the spring clamp shielding element that is mounted below the FTC. See ♦ FTC manual for details. Note Junction box included with hazardous-rated unit. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 24 Connecting 5.3 Unit with remote-located LVDT conditioner card SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 25 Connecting 5.3 Unit with remote-located LVDT conditioner card SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 26: Commissioning
*For WF350 flowmeters, use 60 grams (instead of 45 grams) when calculating Test Rate or Test Weight. Example If the test weight used with a WF330 flowmeter is 7000 grams: Note Use metric tons per hour (t/h) or short tons per hour (STPH) as applicable for TPH. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 27: Lvdt Output
– Tighten the locknut, ensuring the measured value is maintained. ① ③ Locknut LVDT core ② ④ Moving beam LVDT Note Ensure the new position of the LVDT core allows free movement within the LVDT bore. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 28: Span Test
2. Remove the test weight and readjust the LVDT Output Zero, if necessary. If the level test is performed after the integrator has been calibrated, a new integrator zero and span calibration, span adjust, and factoring, should be performed. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 29: Integrator Calibration
3. Route the other end of the string over the calibration pulley. 4. Attach the free end of the string to the string fixing bolt. 5. When the calibration is complete, return the calibration bracket to the storage position. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 30 • there is no material flow during zero and span calibrations • the test weight is suspended free of any obstructions Accurate calibration is not assured until material tests and a manual span adjustment have been performed, as outlined in the Integrator operating instructions. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 31 Commissioning 6.7 Span calibration SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 32: Service And Maintenance
● sensing head outer gasket ● damping fluid ● sensing plate Contact Siemens or your distributor for spare parts ordering information. For a list of parts and part identification diagram, please see Appendix A (Page 45). Unit repair and excluded liability All changes and repairs must be done by qualified personnel and applicable safety regulations must be followed. -
Page 33: Inner Gasket Replacement
If you have any technical questions about the device described in these Operating Instructions and do not find the right answers, you can contact Customer Support: ● Via the Internet using the Support Request: Support request (http://www.siemens.com/automation/support-request) ● Via Phone: –... - Page 34 ● Information about field service, repairs, spare parts and lots more under "Services." Additional Support Please contact your local Siemens representative and offices if you have additional questions about the device Find your contact partner at: Local contact person (http://www.siemens.com/automation/partner)
- Page 35 Service and maintenance 7.4 Technical support SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 36: Diagnosing And Troubleshooting
3. With the moving beam in the static zero position, thread the range spring until the base just touches the static beam and then turn one complete revolution more. 4. Install the range spring mounting bolt and tighten the range spring locknut. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 37: Troubleshooting
To test linearity, at least 3 test weights are used. Each weight represents a different test rate. Record the integrator rate display value associated with each test weight applied to the flowmeter. If all the recorded display values are accurate, the flowmeter measurement is linear. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 38 Some integrators are equipped with a linearization function to compensate for non-linear material flow patterns. Stand-alone linearizing devices are also available for this purpose. Electronic linearization should not be used to correct non-linear test weight results. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 39 Diagnosing and troubleshooting 8.3 Linearity SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 40: Technical Data
NEMA / Type 4 / IP65 (remote mounted unit) enclosure Sensor type LVDT (linear variable differential transformer) Sensing plate construction 304 (1.4306) stainless steel Options 316 (1.4404) stainless steel • abrasion resistant lining • PTFE coating for low cohesion and low friction SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... -
Page 41: Input
0 to 0.75 V AC from LVDT LVDT conditioner card Output Output 0 to 50 mV DC to Siemens integrator; maximum 300 m (1000 ft) separation between conditioner LVDT conditioner card card and integrator Output 0 - 0.75 V AC @ 2.9 kHz... -
Page 42: Approvals
ATEX II 3G, Ex nA IIC T6 GcATEX II 2D, Europe proof Ex tb IIIC T70ºC Db IP64 IECEx FMG 13.0016X, Ex nA IIC T6 Gc, International Ex tb IIIC T70 ºC Db IP64 LVDT conditioner card General purpose CE, RCM approvals SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 43 Technical Data 9.6 Approvals SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 44: Dimension Drawings
Support plate (customer supplied) Note 1. The sensing head support plate should be rigid and independent of the flowmeter housing. 2. Ensure that the outer gasket seal to the flowmeter housing wall is dust tight. SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 45 Dimension drawings 10.1 WFS320 sensing head outline and mounting SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 46: Wfs320 Part Identification Diagram
Appendix A WFS320 part identification diagram SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB... - Page 47 Nut, Lock, RS B (1) LVDT O-Ring, Damper Shaft (1) LVDT Spring O-Ring, Damper Window (1) LVDT Retainer O-Ring, Damper Cover (1) LVDT Transformer O-Ring, Damper Fill Cap (1) Terminal Block (or 38A) Retaining Ring, Damper Spring (1) SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
- Page 48 Appendix A A.1 WFS320 part identification diagram SITRANS WFS320 Operating Instructions, 02/2016, A5E32880290-AB...
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Page 49: For More Information
For more information www.siemens.com/level www.siemens.com/weighing Siemens Canada Limited 1954 Technology Drive Printed in Canada P.O. Box 4225 Subject to change without prior notice Peterborough, ON A5E32880290 Rev. AB Canada K9J 7B1 © Siemens AG 2016 www.siemens.com/processautomation...