Level measurement Guided microwave Product Information VEGAFLEX ma/hart. Level Switching Pressure

Transcription

1 Level measurement Guided microwave Product Information VEGAFLEX ma/hart Level Switching Pressure

2 2 VEGAFLEX ma/hart

3 Contents Contents 1 Product description Configuration Principle of operation Adjustment Connection to power supply Preparing the connection Wiring plans... 6 Supplement...8 Technical data... 8 Dimensions VEGAFLEX ma/hart 3

4 Product description 1 Product description 1.1 Configuration Scope of delivery The scope of delivery encompasses: the VEGAFLEX 62 level sensor documentation - operating instructions manual - Ex-specific safety instructions (with Ex versions) and, if necessary, further certificates. Components VEGAFLEX consists of the following components: process connection with electrode housing with electronics housing cover with indicating and adjustment module PLICSCOM (option) Housing cover with adjustment module PLICSCOM (option) 1.2 Principle of operation Area of application VEGAFLEX 62 is a level senor with cable or rod electrode for continuous level measurement. It is designed for industrial use in all areas of process technology and is suitable for the measurement of liquids and solids. Physical principle High frequency microwave impulses are guided along a steel cable or rod. The microwave impulses are reflected when they reach the product surface. The impulse running time is processed by the integrated electronics and outputted as distance. Power supply VEGAFLEX has a two-wire electronics 4 20 ma/hart for power supply with V DC. Housing with electronics Process connection 1.3 Adjustment VEGAFLEX can be adjusted with three different media: the indicating and adjustment module PLICSCOM the adjustment software acc. to FDT/DTM standard, e.g. PACTware TM and PC a HART handheld. Fig. 1: Example of a VEGAFLEX 62 in cable version with plastic housing 4 VEGAFLEX ma/hart

5 Connection to power supply 2 Connection to power supply 2.1 Preparing the connection Take note of safety instructions for Ex applications In hazardous areas you should take note of the appropriate regulations and type approval certificates of the sensors and power supply units. The sensors must only be operated on intrinsically safe circuits. The permissible electrical values are stated in the certificate. Anschlusskabel auswählenselect connection cable VEGAFLEX is connected with standard two-wire cable. An outer diameter of 5 9 mm ensures the seal effect of the cable entry. If strong electromagnetic interference is expected, shielded cable is recommended. The screen should be applied on both ends. Select voltage supply VEGAFLEX requires a supply voltage of V DC. Power supply and current signal are led via the same two-wire connection cable. Select connection cable for Ex applications Take note of the corresponding installation regulations for Ex applications. Provide a reliable separation between the external energy source and the mains circuits acc. to DIN VDE 0106 part 101. The VEGA power supply units VEGATRENN 149AEx, VEGASTAB 690, VEGADIS 371 as well as all VEGAMETs meet this requirement. When using one of these instruments, protection class II is ensured for VEGAFLEX 62. Bear in mind the following factors regarding supply voltage: Reduction of the output voltage of the power supply unit under nominal load Influence of additional instruments in the circuit (see load values in Technical data). VEGAFLEX ma/hart 5

6 Connection to power supply 2.2 Wiring plans Single chamber housing Overview Double chamber housing Overview Connection compartment Electronics compartment Plastic Aluminium Stainless steel Fig. 2: Overview of the three materials of the single chamber housing Cable entry (pressure-tight with Exd) Fig. 5: Double chamber housing Top view, electronics and connection compartment Contact springs for adjustment module PLICSCOM Top view, electronics compartment Contact springs for adjustment module PLICSCOM Typ: FX60H mA Display Com. Plug connector for VEGACON- NECT 3 Typ: FX60H mA Display Com. Plug connection for VEGACON- NECT 3 Spring-loaded terminals for 4 20 ma connection Spring-loaded terminals for connection of VEGADIS 61 Ground terminal 1) Fig. 3: Top view of the electronics and connection compartment Wiring plan Internal connection cable to connection compartment Fig. 6: Top view of the electronics compartment of the double chamber housing PC with PACTware TM Display Power supply V DC/ 4 20 ma Plug connection Fig. 4: Wiring plan, single chamber housing VEGADIS 61 1) Connect cable screen here, connect ground terminal on housing exterior to ground as prescribed (low-impedance). The two terminals are galvanically connected. 6 VEGAFLEX ma/hart

7 Connection to power supply Top view, connection compartment Contact springs for adjustment module PLICSCOM Top view, connection compartment Exd 1) Spring-loaded terminals for 4 20 ma connection mA Display Plug connection for VEGACON- NECT mA Com. Ground terminal Spring-loaded terminal for 4 20 ma connection Ground terminal 1) Fig. 7: Connection compartment, double chamber housing Fig. 9: Connection compartment, double chamber housing Exd Wiring plan Exd Wiring plan Power supply V DC/ 4 20 ma 1 2 Plug connection VEGA- CON- NECT 3 Fig. 8: Wiring plan, double chamber housing PC with PACTware TM Power supply V DC/ 4 20 ma 1 2 Screen 2) Fig. 10: Wiring plan, double chamber housing Exd 1) Connect cable screen here, connect ground terminal on housing exterior to ground as prescribed (low-impedance). The two terminals are galvanically connected. 1) The indicating and adjustment module PLICSCOM can be used with Exd only in the electronics compartment. 2) Connect cable screen here, connect ground terminal on housing exterior to ground as prescribed (low-impedance). The two terminals are galvanically connected. VEGAFLEX ma/hart 7

8 Supplement Supplement Technical data General data Materials, wetted parts rod ø 16 mm (316L)/Hastelloy C cable ø 6 mm with gravity weight seal Viton, Kalrez 6375, EPDM and plastic process fittings (316L) and PCTFE; Hastelloy C and PCTFE Materials, non-wetted parts housing plastic PBT, Alu-die casting powder-coated, Stainless steel (316L) inspection window Polycarbonate (Makrolon) ground terminal Stainless steel (316L) Basic weight plastic housing 1580 g Aluminium housing 1990 g Aluminium double chamber housing 2290 g stainless steel housing 2350 g rod (ø 16 mm) approx g/m cable (ø 6 mm) approx. 170 g/m gravity weight (only with cable version) 730 g Process conditions Process pressure bar ( kpa) Process temperature Viton C EPDM C Kalrez C Ambient temperature C C Product temperature Output variable Output signal 4 20 ma/hart Resolution 1,6 µa Fault signal 22 ma; 20.5 ma; 3.6 ma (selectable) Current limitation 22 ma Integration time 1) s, adjustable Rise time 6 sec (ti : 0 s, 0 63 %) 1) The time required by the output signal to reach 63 % of the actual height after a jump of the input variable. 8 VEGAFLEX ma/hart

9 Supplement Ambient conditions Ambient temperature C with PLICSCOM (readability) C Storage and transport temperature C Max. tensile load cable-ø 6 mm 30 KN Lateral load (rod) 30 Nm Tensile load Dependent on the vessel diameter and the level, different tensile forces are acting in solids. In the following charts you will see the values for some typical solids. Metal silo with smooth walls diameter 12 m diameter 9 m diameter 6 m diameter 3 m Cereals 30 Sand Tensile force, 6 mm cable (kn) Tensile force, 6 mm cable (kn) Cable length (m) Cable length (m) Plastic granules Cement Tensile force, 6 mm cable (kn) Tensile force, 6 mm cable (kn) Cable length (m) Cable length (m) VEGAFLEX ma/hart 9

10 Supplement Characteristics Min. span between full and empty adjustment 10 mm Min. dielectric value ε r > 1.7 Sensor length Rod 500 mm 6 m blocked distance top 150 mm blocked distance bottom 0 mm Cable 1 m 60 m blocked distance top 300 mm blocked distance bottom 250 mm 100% 0% % 0% Fig. 11: Measuring ranges of VEGAFLEX VEGAFLEX ma/hart

11 Supplement Accuracy Reference conditions acc. to IEC temperature C relative moisture % air pressure mbar ( kpa) Reference reflector metal plate ø 1 m Installation conditions: flange DN 100 min. distance to obstacles 1 m Temperature drift 0,015 %/10 K relating to the max. meas. range mm Meas. error ,5 0,3 60 m Meas. distance - 10 Reference conditions acc. to IEC Power supply Power supply V DC EEx d ia instrument V DC EEx ia instrument V DC Permissible residual ripple < 100 Hz U ss 1 V 100 Hz 10 khz U ss 10 mv Load see diagram Ω Line resistance + HART resistance Voltage limit non-ex sensor 250 HART load Exd Voltage limit Ex sensor V Output voltage power supply unit Electromechanical data Cable entry and terminals single chamber housing M20 x 1.5 (cable-ø 5 9 mm)/½ NPT double chamber housing M20 x 1.5 (cable-ø 5 9 mm)/½ NPT M16 x 1.5 (cable-ø 4 8 mm) Spring-loaded terminals for wire cross-section up to 2.5 mm² VEGAFLEX ma/hart 11

12 Supplement Electrical protective measures Protection IP 66/IP 67 Overvoltage category III Protection class II Approvals 1) ATEX II 1G, 1/2G, 2G EEx ia IIC T6, ATEX II 1/2G, 2G EEx d ia IIC T6, ATEX II 1/2D IP6X T, ship approvals 1) Deviating data with Ex applications: see separate safety instructions. 12 VEGAFLEX ma/hart

13 Supplement Dimensions VEGAFLEX 62 SW60 G1 1/2 / 1 1/2 NPT , ø 30 ø ø ø 54 VEGAFLEX ma/hart 13

14 Supplement Plastic housing Stainless steel housing Aluminium double chamber housing Aluminium housing ~ 69 ø 77 ~ 69 ø 77 ~ 79 ø 84 M16x1,5 ~ 116 ø 84 M20x1,5 112 (*123) 112 (*123) 112 (*123) 112 (*123) ½ M2 ½ N M20x1,5/ ½ NPT * with display M20x1,5/ ½ NPT Low cover without PLICSCOM High cover with PLICSCOM 23,6 34,5 14 VEGAFLEX ma/hart

15 Supplement VEGAFLEX ma/hart 15

16 VEGA Grieshaber KG Am Hohenstein Schiltach Germany Phone Fax You will have on our homepage under VEGA online Downloads of the following operating instructions manuals menu schematics software certificates approvals and many of other things.