Operating Instructions Capacitive rod electrode for level detection VEGACAP 27 - Relay (DPDT) Document ID: 33758
Contents Contents About this document 1.1 Function............................................................................................................................ 4 1.2 Target group...................................................................................................................... 4 1.3 Symbolism used................................................................................................................ 4 2 For your safety 2.1 Authorised personnel....................
Contents Supplementary documentation Information: Supplementary documents appropriate to the ordered version come with the delivery. You can find them listed in chapter "Product description". 33758-EN-130916 Instructions manuals for accessories and replacement parts Tip: To ensure reliable setup and operation of your VEGACAP 27, we offer accessories and replacement parts.
1 About this document 1 About this document 1.1 Function 1.2 Target group 1.3 Symbolism used This operating instructions manual provides all the information you need for mounting, connection and setup as well as important instructions for maintenance and fault rectification. Please read this information before putting the instrument into operation and keep this manual accessible in the immediate vicinity of the device. This operating instructions manual is directed to trained specialist personnel.
2 For your safety 2 2.1 For your safety Authorised personnel All operations described in this operating instructions manual must be carried out only by trained specialist personnel authorised by the plant operator. During work on and with the device the required personal protective equipment must always be worn. 2.2 Appropriate use The VEGACAP 27 is a sensor for point level detection. You can find detailed information on the application range in chapter "Product description".
2 For your safety 2.5 Safety label on the instrument 2.6 CE conformity 2.7 Safety instructions for Ex areas 2.8 Environmental instructions The safety approval markings and safety tips on the device must be observed. This device fulfills the legal requirements of the applicable EC guidelines. By attaching the CE mark, VEGA provides a confirmation of successful testing. You can find the CE conformity declaration in the download area of "www.vega.com".
3 Product description 3 Product description 3.1 Configuration Scope of delivery The scope of delivery encompasses: Constituent parts The VEGACAP 27 consists of the components: • • • • • VEGACAP 27 point level switch Documentation –– this operating instructions manual –– if necessary, further documents Housing cover Housing with electronics Process fitting with electrode 1 2 3 4 5 Fig.
3 Product description Area of application 3.2 Principle of operation VEGACAP 27 is a point level sensor with fully insulated, capacitive electrode with screen segment and active tip for level detection. VEGACAP 27 is very rugged and maintenance-free and can be used in all areas of industrial process technology. Typical applications are overfill and dry run protection. Setup of the instrument is very easy because an adjustment is not necessary.
3 Product description a connected device can be operated directly (e.g. a warning system, a pump etc.). The data for power supply are specified in chapter "Technical data". 3.3 Operation The probe can be adapted to the dielectric constant of the product directly on the electronics module. A switching command can be triggered when the probe is covered or laid bare.
4 Mounting 4 4.1 Mounting General instructions Suitability for the process Make sure that all parts of the instrument coming in direct contact conditions with the process, especially the sensor element, process seal and process fitting, are suitable for the existing process conditions, such as process pressure, process temperature as well as the chemical properties of the medium. You can find the specifications in chapter "Technical data" and on the nameplate.
4 Mounting Pressure/Vacuum The process fitting must be sealed if there is gauge or low pressure in the vessel. Before use, check if the seal material is resistant against the measured product and the process temperature. The max. permissible pressure is specified in chapter "Technical data" or on the type label of the sensor. Agitators and fluidization 4.2 Mounting instructions Due to the effects of agitators, equipment vibration or similar, the level switch can be subjected to strong lateral forces.
5 Connecting to power supply 5 Note safety instructions Voltage supply Connecting to power supply 5.1 Preparing the connection Always keep in mind the following safety instructions: • Connect only in the complete absence of line voltage Connect the operating voltage according to the following connection diagrams. The electronics module CAP E31R is designed in protection class I.
6 Setup 6 Setup 6.1 General information The figures in brackets refer to the following illustrations. Function/Configuration On the electronics module you will find the following display and adjustment elements: • • • Potentiometer for switching point adaptation DIL switch for mode adjustment - A/B Control lamp Note: As a rule, always set the mode with the mode switch (5) before starting setup VEGACAP 27. The switching output will change if you set the mode switch (5) afterwards.
6 Setup To adjust VEGACAP 27, loosen first of all the four screws on the upper side of the instrument with a screwdriver and remove the housing cover. Switching point adaptation (6) You can adapt the switching point to the solid with the potentiometer. Mode adjustment (5) With the mode switch you can change the switching condition of the relay. You can set the required mode (A - max. detection or overfill protection, B - min. detection or dry run protection).
6 Setup 3. Turn the below potentiometer (6) first of all anticlockwise (max. 20 turns) until the control lamp signals "covered". Mode A (overfill protection) = control lamp lights Mode B (dry run protection) = control lamp extinguishes If this condition is already reached, you can continue with the next step. 4. Turn the potentiometer (6) very slowly (due to the damping) clockwise until the control lamp signals "uncovered".
6 Setup Level Switching status Control lamp Mode B Dry run protection 3 4 5 (6) (7) (8) Relay energized Mode B Dry run protection 3 4 5 (6) (7) (8) Relay deenergized Failure of the supply voltage (mode A/B) any 3 4 5 (6) (7) (8) Relay deenergized 33758-EN-130916 16 VEGACAP 27 • - Relay (DPDT)
7 Maintenance and fault rectification 7 Maintenance and fault rectification 7.1 Maintenance 7.2 Rectify faults If the instrument is used properly, no special maintenance is required in normal operation. Reaction when malfunctions occur The operator of the system is responsible for taking suitable measures to rectify faults. Reaction when malfunctions occur The operator of the system is responsible for taking suitable measures to rectify faults.
7 Maintenance and fault rectification Checking the switching signal Error Cause Rectification –– The instrument signals covered without covering with the medium –– The instrument signals covered with covering with the medium Wrong mode selected Set the correct mode on the mode switch (A - overflow protection, B - dry run protection). Wiring should be carried out according to the quiescent current principle. Operating voltage Check operating voltage too low Shortcircuit in the probe, e.g.
7 Maintenance and fault rectification 2 1 CPH 2 MΩ 7 3 6 2 MΩ 4 2 MΩ CM 3 Fig. 21: Check the resistance in the probe 1 2 3 Contact 1 (middle pin) Variable capacitor (phase) Capacitor Measure the resistance values between the following contacts with an ohmmeter (range MΩ). Contact 4 against contact 1 (middle pin) The resistor must be 2 MΩ. If the resistor is lower, this means moisture in the housing or a fault in the electrode insulation.
7 Maintenance and fault rectification If the resistance value is > 3 Ω, this can be due to corrosion on the thread or flange or the thread was covered e.g. with teflon tape. Check the connection to the vessel. If there is no connection, you can connect a cable from the outer ground terminal to the vessel. Keep in mind that coated flanges must always be connected via the ground terminal to the vessel.
7 Maintenance and fault rectification 6. Loosen the two screws with a Torx screwdriver. 7. Open the tensile ring on the old electronics module and pull out the old electronics module. 8. Compare the new electronics module with the old one. The type label of the electronics module must correspond to that of the old electronics module. 9. Insert the new electronics module. 10. Screw in and tighten the two screws with a Torx screwdriver. 11. Lead the connection cable through the cable gland. 12.
8 Dismounting 8 8.1 Dismounting Dismounting steps Warning: Before dismounting, be aware of dangerous process conditions such as e.g. pressure in the vessel, high temperatures, corrosive or toxic products etc. Take note of chapters "Mounting" and "Connecting to power supply" and carry out the listed steps in reverse order. 8.2 Disposal The instrument consists of materials which can be recycled by specialised recycling companies.
9 Supplement 9 Supplement 9.1 Technical data General data Material 316L corresponds to 1.4404 or 1.4435 Materials, wetted parts ƲƲ Process fitting - thread 316L, 316Ti or Aluminium ƲƲ Process fitting - bolting DN 50 316Ti ƲƲ Process fitting - Tri-Clamp ƲƲ Process seal ƲƲ insulation (fully insulated) ƲƲ Probe (rod PTFE fully insulated: ø 16 mm/0.
9 Supplement Switching current ƲƲ Min. ƲƲ Max. Breaking capacity ƲƲ Min. ƲƲ Max. Potential separation Contact material (relay contacts) Modes (switchable) Switching delay 10 µA 3 A AC, 1 A DC 50 mW 750 VA AC, 54 W DC If inductive loads or stronger currents are switched through, the gold plating on the relay contact surface will be permanently damaged. The contact is then no longer suitable for switching low-level signal circuits.
9 Supplement 1 63 bar (914psi) 2 25 bar (363psi) 100°C (212°F) 0°C (32°F) -10°C (-14°F) 3 200°C (392°F) Fig. 22: Process pressure - Process temperature - VEGACAP 27 with process fitting of 316L 1 2 3 Process pressure Process temperature Temperature range with temperature adapter 1 63 bar (914psi) 2 25 bar (363psi) -50°C (-58°F) 0°C (32°F) 100°C (212°F) 3 200°C (392°F) Fig.
9 Supplement ƲƲ Single chamber housing –– 1 x cable entry M20 x 1.5 (cable: ø 5 … 9 mm), 1 x blind plug M20 x 1.5; attached 1 x cable entry M20 x 1.5 or: –– 1 x cable entry ½ NPT, 1 x blind plug ½ NPT, 1 x cable entry ½ NPT or: Screw terminals Adjustment elements Mode switch ƲƲ A ƲƲ B Potentiometer Voltage supply Operating voltage Power consumption –– 1 x plug M12 x 1; 1 x blind plug M20 x 1.5 for wire cross-section up to 1.5 mm² (AWG 16) Min. detection or dry run protection Max.
9 Supplement 9.2 Dimensions 85 mm (3 11/32") ~ 76 mm 90 mm (3 35/64") (2 63/64") G1½ / 1½”NPT 21 mm (53/64") 28 mm (1 7/64") 20 mm (25/32") SW 60 (2 23/64") (25/32") LA L ø 20 mm Fig.
9 Supplement 90 mm (3.54") 200 mm (7.87 ") SW 60 mm (2.36") SW 60 mm (2.36") Fig.
9 Supplement 9.3 Industrial property rights VEGA product lines are global protected by industrial property rights. Further information see www.vega.com. Only in U.S.A.: Further information see patent label at the sensor housing. VEGA Produktfamilien sind weltweit geschützt durch gewerbliche Schutzrechte. Nähere Informationen unter www.vega.com. Les lignes de produits VEGA sont globalement protégées par des droits de propriété intellectuelle. Pour plus d'informations, on pourra se référer au site www.
Notes 33758-EN-130916 30 VEGACAP 27 • - Relay (DPDT)
33758-EN-130916 Notes VEGACAP 27 • - Relay (DPDT) 31
All statements concerning scope of delivery, application, practical use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing. Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2013 VEGA Grieshaber KG Am Hohenstein 113 77761 Schiltach Germany Phone +49 7836 50-0 Fax +49 7836 50-201 E-mail: info.de@vega.com www.vega.
