SE 655(X) / SE 656(X) Toroidal Conductivity Sensors

Transcription

1 User Manual English SE 655(X) / SE 656(X) Toroidal Conductivity Sensors Latest Product Information:

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3 Description 3 The SE 655(X) and SE 656(X) toroidal conductivity sensors are particularly suited for applications in the chemical industry and for process analysis. Thanks to the large measuring range over six decades and the high chemical resistance of the process-wetted parts made of PEEK or PFA, resp., almost every conceivable application is possible, such as concentration determination of acids, bases and salt solutions, monitoring of product quality or phase separation of product mixtures. The SE 655X and SE 656X sensors are approved for operation in hazardous locations. Safety Information Application in hazardous locations: Observe the EC-Type-Examination Certificate and the provisions of the current EN (Electrical installations in hazardous areas) when installing the product. Manipulations of the product other than described in the user manual are not permitted. Assembly/dismantling, installation, operation and maintenance shall only be carried out by qualified personnel as defined by the automation industry in compliance with the applicable regulations and this user manual. Be sure to observe the specified ambient conditions and installation instructions. The sensors were developed in compliance with the applicable European guidelines and standards. The models SE 655X and SE 656X are suitable for use in hazardous locations. Compliance with the European Harmonized Standards for use in hazardous locations is confirmed by the EC Declaration of Conformity (see page 12). Be sure to follow the instructions given in this user manual for connecting and operating the SE 655(X) and SE 656(X) sensors. Observe the specified ambient conditions and temperature ranges to ensure the safe operation of the sensors. Take care to maintain the IP 68 protection when installing the sensor (use original gasket, pay particular attention to the cable connections). Make sure that the gaskets are securely in place. Otherwise, the assembly is not tight. Do not dismantle the sensor as long as the process medium is under pressure. For applications in aggressive media such as highly concentrated acids or bases, use the SE 656(X) sensor with sealing sets B or C (ZU 0340N or ZU 0342N) made of particularly resistant material (PTFE). Special conditions for safe use in hazardous areas The sensors may only be used in liquid media with a conductivity of > 10 ns/cm (risk of electrostatic charging of the sensor). The sensors are suitable for use in the following ambient/process temperature ranges: Temperature class T4: C Temperature class T6: C The measuring cable must be protected from electrostatic charging when applied in Ex Zone 0 (1G). Metallic process connection parts must be mounted at the installation site so that they are electrostatically conductive (< 1 Mohm).

4 4 Table of Contents Description...3 Safety Information...3 Table of Contents...4 Specifications...5 Chemical resistance...6 Temperature and pressure resistance...6 Electrical connection...7 Identification of the sensors...7 Assembly...8 Assembly, with PTFE washer (for flange protection)...8 Assembly, without PTFE washer (flange wetted by process medium)...8 Dimension Drawings...10 Dimension Drawings of Flange...11 EC Declaration of Conformity...12 EC-Type-Examination Certificate...13 Accessories...18

5 Specifications 5 General Cell factor Transfer ratio Approx. 2 (for installation conditions, see Fig. 10 Minimum extent of the free field without change of the cell factor, page 9) Sensor coding Measuring range Resolution F ms/cm 0001 ms/cm Accuracy ( C) ± (0.005 ms/cm 0.5 % meas. value) Accuracy (> 100 C) ± (0.010 ms/cm 0.5 % meas. value) Material SE 655(X) SE 656(X) Process temperature Safe area Ex T4 Ex T6 Temperature response time t90 (DIN 746-1) SE 655(X) SE 656(X) PEEK PFA C C C Approx. 7 min Approx. 11 min (For measuring processes with rapid temperature changes, use a separate temperature detector with fast response.) Ambient temperature C Storage temperature C Process pressure SE 655(X) SE 656(X) bar bar Temperature detector Pt 100, Class A (IEC 751) Assembly G 3/4 Cable Length Connection Protection (EN 60529) Explosion protection SE 655X/SE 656X Weight 5 m (max. permissible cable length for hazardous-area applications: 55 m) Wire end ferrules IP 68 (sensor mounted, with original gasket) II 1G Ex ia IIC T4/T6 Ga Approx. 1 kg

6 6 Specifications Chemical resistance Medium Concentration [%] Nitric acid HNO 3 5 up to 40 Phosphoric acid H 3 PO 4 up to 10 Sodium hydroxide solution NaOH Temperature and pressure resistance P/T diagram (sensor version) 3 Temperature [ C] Resistance PFA / PEEK - Pressure [bar] SE 655(X), PEEK SE 656(X), PFA Temperature [ C] Fig. 1 Pressure/temperature curves for the different sensor materials P/T diagram (flange version) Pressure [bar] 16 DN 50, stainless steel (ZU 0343) 9 DN 50, PVDF (ZU 0344) 1, Temperature [ C] 125 Fig. 2 Pressure/temperature curves for the different flanges

7 Specifications 7 Electrical connection Connect the sensor to you measuring device. Refer to the user manual of your measuring device for information on the electrical connection. For further information, see Coax RD Coax WH BU RD RD BU receive hi receive lo send lo send hi Fig. 3 Wire assignment of measuring cable GN WH YE GY RTD (temp) RTD (temp) sense (temp) shield Identification of the sensors Safe-area model Hazardous-area model Fig. 4 Model designation / rating plates of SE 655(X) sensors Safe-area model Hazardous-area model Fig. 5 Model designation / rating plates of SE 656(X) sensors

8 8 Assembly Assembly, with PTFE washer (for flange protection) Max. torque 20 Nm, 36-mm wrench Nut (included with sensor) Replacement: ZU 0341 N O-ring (included with sensor) Replacement: ZU 0341N ZU 0343 flange ZU 0342N: PTFE washer DN 50 Sensor: PFA Fig. 6 Assembly, with PTFE washer Assembly, without PTFE washer (flange wetted by process medium) Max. torque 20 Nm, 36-mm wrench Nut Flange (stainless steel) DN 50 PN 16 Gasket Sensor Flange kit DN 50 PVDF PN 10 Lapped flange (UP-GF) Nut Flange (PVDF) Fig. 7 Assembly, without PTFE washer

9 Assembly 9 Min. distance 30 mm (no change of cell factor) With a distance of less than 30 mm to metallic tank or pipe walls, the cell factor will be reduced. With insulating walls, the cell factor will increase. Fig. 8 Minimum extent of the free field without change of the cell factor Make sure that the sensor is correctly positioned. Minimum water level in the pipe (sensor head completely wetted) a max 100 Fig. 9 Typical installation in a pipe Installation factor 1,40 1,20 Insulating pipe wall 1,00 0,80 Conducting pipe wall Distance a to pipe wall [mm] Fig. 10 Minimum extent of the free field without change of the cell factor

10 10 Dimension Drawings 36 A/F 98 G 3/4 Ø 39 Ø / 151 Ø 47 Ø Fig.11 Dimensions of the sensor [mm]

11 Dimension Drawings of Flange 11 Flange kit DN 50 PN 10, PVDF, ZU 0344 Lapped flange Flange (PVDF) 4 x Flange kit DN 50 PN 16, 316L, ZU x Flange (stainless steel) Fig. 12 Dimensions of the flanges [mm]

12 12 EC Declaration of Conformity

13 EC-Type-Examination Certificate 13

14 14 EC-Type-Examination Certificate

15 EC-Type-Examination Certificate 15

16 16 EC-Type-Examination Certificate

17 EC-Type-Examination Certificate 17

18 18 Accessories Flange DN 50 PN 16 Material: 316 L (When using the SE 656(X) sensor or measuring in aggressive media, you require sealing set C.) Order No. ZU 0343 Flange DN 50 PN 10 Material: PVDF ZU 0344 Sealing set A spare part for SE 655(X) Sealing set B spare part for SE 656(X) Nut FKM (Viton) O-ring (3 x) Nut FFKM (Chemraz) O-ring (2 x) Sealing set C PTFE washer DN 50 (protects ZU 0343 flange against aggressive media) ZU 0340N ZU 0341N ZU 0342N Conductivity standard KCl 0.1 mol/l 250 ml ms/cm 1.5% ZU 0348 For more accessories enabling the installation in immersion fittings or flow-through fittings, refer to the Knick Process Analytics catalog. For your notes:

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20 Knick Elektronische Messgeräte GmbH & Co. KG Beuckestr Berlin Tel: 49 (0) Fax: 49 (0) Internet: TA KNE