Instruction Manual. Model SC4A 19mm Conductivity Sensors. IM 12D7J4-E-E 6th edition YOKOGAWA

Transcription

1 Instruction Manual Model SC4A 19mm Conductivity Sensors YOKOGAWA 6th edition

2 TABLE OF CONTENTS 1. GENERAL Type number General specifications SC4A-AD General specifications SC4A-SA/SB/SC General specifications SC4A-PR Labelling INSTALLATION connection Mounting Safety warning OPERATION AND MAINTENANCE Checking the cell Calibration of the cell Cleaning of the cell Spare parts list... 8

3 1 1. GENERAL 1-1. Type number The type number of the conductivity cell, shown on the cable, gives coded information on the cell constant, the materials of construction etc. 1-2.General specifications SC4A-AD Materials Wetted Parts Body & electrodes : Stainless steel AISI 316 or Titanium grade 2 or 3 O-rings : Viton Mounting adapter : PVDF or Stainless steel AISI 316 Insulation : PEEK (Poly Ether Ether Ketone) Operating Specifications (Sensor) Measuring system : 2-electrode (4-wire) Maximum pressure : 10 Bar (142 PSIG) Maximum temperature : 110 C (230 F) Temperature response : < 1 minute for 90% of a step change Sterilize : At 135 C (275 F) Shipping details Package size : wxhxd 220 x 220 x 90 mm wxhxd 215 x 150 x 55 mm package weight : Approx. 1.6 kg. 3.5 Ib Model Suffix Option Description Code code SC4A 19 mm conductivity sensor -T Titanium -S Stainless steel Fitting-type -AD For adapter mounting Sensor-length cm cm Cellconstant /cm /cm Cable length meter meter meter meter meter -T1 Pt1000 AD only /PS 3 /4 stainless steel adapter /PF 3 /4 PVDF adapter /FF SS Flowfitting (option /PS required) Certificates /Q Quality Inspection Certificate 152 (5.98") -AD -15cm 90 (3.55) Ø 19,1 (0.75") Note: 3.1 Material certificate according to EN is standard delivered with this sensor. BAR PVDF SS Operating Specifications (Adapters) ºC Ø19,1 (0.75) -AD -09cm

4 2 1-3 General specifications SC4A-SA/SB/SC Materials Wetted Parts Body & electrodes : Stainless steel AISI 316 (1.4435), Ro < 0.5 O-rings : EPDM, FDA migration tested Mounting adapter : Stainless steel AISI 316 Triclamp acc. to ISO Insulation : PEEK (Poly Ether Ether Ketone), FDA migration tested Operating Specifications (Sensor) Measuring system : 2-electrode (4-wire) Maximum pressure : 10 Bar (142 PSIG) Maximum temperature : 110 C (230 F) Temperature response : < 1 minute for 90% of a step change Sterilize : At 135 C (275 F) Operating Specifications Stainless Steel Maximum pressure Maximum temperature Shipping details Package size package weight : 10 Bar (142 psig) : 135 C (275 F) : wxhxd 220 x 220 x 90 mm wxhxd 215 x 150 x 55 mm : Approx. 1.6 kg. 3.5 Ib 95 (3.74") Ø 25 (1.00") Ø 38 x 5 (1.50 x SA Model Suffix Option Description Code code SC4A 19 mm conductivity sensor -E EPDM FDA Fitting-type -SA 25mm port -SB 1-1 1/2 tri-clamp -SC 2 tri-clamp Always -NN fixed length Cellconstant /cm /cm Cable length meter meter meter meter meter -T1 Pt1000 Certificates /Q Quality Inspection Certificate 70 (2.75") Ø50,4 (1.98") Ø19 (0.75") -SB " tri-clamp 80 (3.15") 2 " tri-clamp Ø63,9 (2.52") Ø25 (1.00") -SC Note: 3.1 Material certificate according to EN is standard delivered with this sensor.

5 3 1-4 General specifications SC4A-PR Materials Wetted Parts Body & electrodes : Stainless steel AISI 316 or Titanium grade 2 or 3 O-rings : Viton Mounting adapter : Retractable fitting Insulation : PEEK (Poly Ether Ether Ketone) Operating Specifications (Sensor) Measuring system : 2-electrode (4-wire) Maximum pressure : 10 Bar (142 PSIG) Maximum temperature : 110 C (230 F) Temperature response : < 1 minute for 90% of a step change Sterilize : At 135 C (275 F) Shipping details Package size package weight : wxhxd 220 x 220 x 90 mm wxhxd 215 x 150 x 55 mm : Approx. 1.6 kg. 3.5 Ib Model Suffix Option Description Code code SC4A 19 mm conductivity sensor -T Titanium -S Stainless steel Fitting-type -PR For retractable mounting Always -NN fixed length Cellconstant /cm /cm Cable length meter meter meter meter meter -T1 Pt1000 Certificates /Q Quality Inspection Certificate Note: 3.1 Material certificate according to EN is standard delivered with this sensor. M19x (1.89") Ø19 (0.75") -PR 1-5. Labelling In addition to the type number, information is given regarding: - The batch number (e.g. P7). This number should be quoted in any service or maintenance queries. - Individual cell constant calibration.

6 4 OP OPTIONS ca 49 (1.95") 3/4 NPT ca 49 (1.95") 3/4 NPT /PS /PF Figure 1-1. Adapters for SC4A-AD... Figure 1-2. Mounted sensor with the option /PS and /PF units in mm (inch) 3/4 NPT 1/4 NPT Ø30 55 (2.16") 100 (3.94 ) 51 (2.00") 1/4 NPT 30 (1.18 ) Figure 1-3. Flow fitting option /FF K1598 AC (incl. 3.1 certificate) Figure 1-4. Welding socket for SC4A-SA...

7 5 Tri-clamps for SC4A -SB... 12,7 (0.5") Ø25,4(1.0") /SB1 12,7 (0.5") Tri-clamp for SC4A-SC... Ø38,1(1.5") /SB2 12,7 (0.5") Figure 1-5. Tri-clamp dimensions Ø50,8(2.0") /SC1 Figure 1-6. Mounted Sensor SC4A -SB / - SC

8 6 2. INSTALLATION 2-1. Connection The cable is six wire multicore and covered with a thermoplastic TPE. The wires are also covered with thermoplastic TPE individually and coloured. The cable connections are supplied with 2 mm terminations for connection to the transmitter, or connection box: these pins quarantee a correct and simple connection to the terminals. Figure 2-0. Sensor Wiring At the instrument end the cable termination tags are numbered to correspond with their respective terminals of the transmitters. NOTE: If the cable is used with a connection box, type BA10 then special purpose cable, type WF10 must be used between connection box and transmitter connected to the same terminals as the cell cable. A maximum of 50 metres total cable length is permissable Mounting The mounting is by a compression gland or sanitary adapter, giving a simple effective method of direct insertion in process pipework. For mounting the retractable sensor refer to the instruction manual of the PR4A retractable holder. Before mounting a cell in a process plant environment the following points should be considered: - a good, representative, flow of process liquid through the cell should exist. Hence, the cell must be mounted in the process 11 Temperature 12 Temperature 13 Outer electrode 14 Outer electrode 15 Inner electrode 16 inner electrode in such a way that the flow through it represents the true composition of the liquid. The flow through the cell should be uninterrupted and the cell should not be mounted at a dead angle. - a cell must be immersed in the process liquid to a level above the outlet to ensure an uninterrupted liquid path between the electrodes. - the cell should be mounted in such a way to allow easy removal for maintenance. It is recommended that the cell is mounted in a by-pass directly behind a drain valve Safety warning For SC4A..AD to avoid the sensor shooting out, never install in application where pressure can exceed specified maximum. Never loosen mounting nut while system is pressurised Commisioning The sensor cable is marked with a label specifying complete MS mode, Serialnumber and calibrated cell constant*. This cell constant must be entered in the EXA transmitter to achive an accurate measurement. * Always specify complete MS code and serialnumber in communication with Yokogawa organisation with regards to performance issues or warranty matters. A Figure 2-1. WF10 Cable C E B D screen overall shield

9 7 3. OPERATION AND MAINTENANCE 3-1. Checking the cell If a fault occurs, first check the cell for visible damage. If damage is not apparent, check the cell resistances measuring between the cable connections. a. 11 and 12 (or connector pins 1 and 2) b. 11 and 13 (or connector pins 1 and 3) c. 12 and 13 (or connector pins 2 and 3) d. 12 and 15 (or connector pins 4 and 5) e. 15 and 16 (or connector pins 5 and 6) f. 13 and 14 (or connector pins 3 and 4) g. 13 and 15 (or connector pins 3 and 5) Celltype a, b, c, d, g e, f SC4A Pt1000 value > 100MΩ < 2Ω If the cell has become fouled resistance will be developed across the electrodes. These resistances can be measured by making contact directly with the electrode and the relevant pin of the connector Calibration of the cell The cell constant is determined under laboratory conditions. It is possible that slight variations in the cell constant may occur dependant on the installation. This possible error can be corrected by recalibrating with a solution of known conductivity value. The procedure is descibed in ASTM D1125 or OIML recommendation 56. Sensors with long cables may exhibit an offset in the temperature readings. This can be adjusted in the transmitter or converter. A calibrated thermometer should be used as reference measurement Cleaning of the cell If the cell becomes fouled an insulating layer may be formed on the electrodes and consequently, an apparent increase in cell constant may accur, giving a measuring error. This error is: (Rv) 2 x 100 % (Rcel) Where: Rv = the resistance of the fouling layer Rcel = the cell resistance. Cleaning methods 1. For normal applications hot water with domestic washing-up liquid added will be effective. 2. For lime, hydroxides, etc. a % solution of hydrochloric acid is recommended. 3. Organic foulings (oils, fats, etc.) can be easily removed with acetone. 4. For algae bacteria or moulds, use a chlorinated solution (domestic bleach*). * Never use hydrochloric acid and domestic bleach simultaneously. The liberation of the very poisonous gas Chlorine will result. NOTES: The specific conductivity value of the solution of known value must be near the value of the liquid to be measured. Specific conductivity is highly temperature dependent, therefore in the above calibration procedure the temperature of the cell and the liquid should be allowed to equalise and should be accurately measured with a calibrated thermometer.

10 SPARE PARTS AND ACESSOIRES Spare parts and acessories for SC4A-S- AD and SC4A-T-AD K1542DF K1500DY K1542CW K1598AC Compression fitting in Stainless Steel ( /PS) Ferrule set for K1542DF Compression fitting in PVDF (/PF) Flowfitting with 3.1 material certificate Spare parts and acessories for SC4A-E-SA K1542FA K1500BJ Straight welding socket and mounting nut Stainless Steel O-rings in EPDM (5), FDA migration tested Spare parts and acessories for SC4A-E-SB K1542FC K1500HN K1542FF K1500BN Tri-Clamp mounting set for 1 triclamp (welding socket, sealing gasket and clamp ring) (/SB1) Sealing gasket in EPDM for K1542FC (3), FDA migration tested Tri-Clamp mounting set for 1,5 triclamp (welding socket, sealing gasket and clamp ring) (/SB2) Sealing gasket in EPDM for K1542FF (3), FDA migration tested Spare parts and acessories for SC4A-E-SC K1542FE K1500BP Tri-Clamp mounting set for 2 triclamp (welding socket, sealing gasket and clamp ring) (/SC1) Sealing gasket in EPDM for K1542FE (3), FDA migration tested Spare parts and acessories for SC4A-T-PR and SC4A-S-PR K1500BE O-rings in Viton (10) K1500ED O-rings in Kalrez (2)

11 9

12 YOKOGAWA HEADQUARTERS 9-32, Nakacho 2-chome, Musashinoshi Tokyo 180 Japan Tel. (81) Fax (81) YOKOGAWA EUROPE B.V. Databankweg AL AMERSFOORT The Netherlands Tel Fax YOKOGAWA CORPORATION OF AMERICA 2 Dart Road Newnan GA United States Tel. (1) Fax (1) YOKOGAWA ELECTRIC ASIA Pte. Ltd. 5 Bedok South Road Singapore Singapore Tel. (65) Fax (65) Yokogawa has an extensive sales and distribution network. Please refer to the European website ( to contact your nearest representative. YOKOGAWA Copyright Subject to change without notice (A) Q Printed in The Netherlands