Level Switch LFFS. Description

Transcription

1 R Level Switch LFFS Wetted parts in acidproof, stainless steel and PEEK Compact, food compatible, hygienic design Hygienic connections conform to 3A standards, FDA demands and EHEDG guidelines Precise switching point without calibration Process temperature C Measures media with DKvalues >.5 Not influenced by foam LED switch indicator Maintenance free Suitable for media separation measurement Configurable by FlexProgrammer 970 ATEX approval for gas and dust Description The Level Switch LFFS designed to detect levels in tanks, media separation and provide emptypipe detection or dryrun protection for pumps. A high frequency sweep signal is radiated from the sensor tip into the tank. The media will act as a virtual capacitor, which together with a coil in the sensor head, will form a circuit creating the switch point signal. This virtual capacity will depend of the dielectric value of the media. By means of the FlexProgrammer 970 the output can be confi gured to either NPN, PNP or digital output signal. A damping of the output signal can be activated in case of a fl uctuating media level, e.g. during tank fi lling. The measurement is precise and unaffected by the mounting position in the tank. In the Flexsoftware a compensation for foam, bubbles and condensate as well as viscous media can be set. The Flexsoftware also features an adjustment facility making the user able to adjust the sensor to a specifi c media. The Level Switch LFFS measures liquids such as water and beer as well as viscous, sticky fl uids, such as honey, youghurt, toothpaste and ketchup. Even dry medias can be measured, eg. sugar or fl our. The Level Switch LFFS is resistent against CIP and SIP agents. Hygienic installation is also possible with the comprehensive range of accessories, see the overview at page 6. Page

2 Technical Data Sensor Radiated signal Process connection MHZ Adapters Refer to page 6 Insulating material PEEK Natura Mechanical data Hygienic: G/, 3A/DN38 or sliding connection Housing Stainless Steel, W.430/AISI 304 Process connection Stainless Steel, W.4404/AISI 36 L Amb. temperature C Process temperature Sliding connection C (See curve ) Std. & 3A/DN C (See curve ) < hour, T amb < 60 C C Protection class IP67 (IEC 59) Media pressure Sliding connection: Max. 6 bar Std. & 3A/DN38: Max. 40 bar Vibrations IEC 686, GL test (Std. & 3A/DN38) Installation Any position Conformity 3A standards (Std. & 3A/DN38) Electrical connection Cable gland M6 Plug M Other electrical data Power supply Damping Powerup time Hysteresis Repeatability Reaction time Plast or Nickelplated brass Nickelplated brass, 35 ma max sec. < sec. ± mm ± mm Dimensional Drawings [mm] ø55 0. sec. max. Disposal of product and packing According to national laws or by returning to Baumer EMC data Immunity EN 636 Emission EN 636 Ex data (ia) Internal inductivity L i < 0 µh Internal capacity C i < 33 nf Barrier data U < 30 VDC ; I < 0. A ; P < 0.75 W Approval Ex ia IIC T5, ATEX II G (See table ) Supply range VDC Temperature class T...T5: 40 < T amb < 85 C Approval Ex td A0 IP67 T00 C, ATEX II D (See table ) Supply range...30 VDC Temperature class T00 C: 40 < T amb < 85 C Approval Ex na II T5, ATEX II 3G (See table ) Supply range...30 VDC Temperature class T...T5: 40 < T amb < 85 C Output Output (active) Output type Output polarity Active Low Active High Three State Output Factory Settings Max. 50 ma, shortcircuit and hightemperature protected PNP, NPN or Digital output (Pushpull) See drawing NPN and Digital output (VDC.5V) ± 0.5V ; Rload kohm PNP and Digital output (VDC.5V) ± 0.5V ; Rload kohm ± 00µA Max. Output PNP Measure DK value > Damping 0. sec. 58 M6 gland M plug Safety chain G/ Hygienic sliding nipple Sliding connection length, refer to ordering data 44 AF G/ 9 Washer ring kit, items Type no included G/ Hygienic connection 3A/DN38 Hygienic connection Oring EPDM incl. G/ Hygienic, Sliding connection Page

3 Electrical Connection Output Teachin Sensor or () or () Case Mplug M plug: : Brown : White 3: Blue 4: Black Electrical Installation Normally Open PLC 0 ma Active High 50 ma LED PNP Output NPN Output Digital Output Normally Closed PLC 50 ma 0 ma LED PNP Output NPN Output Digital Output Active Low Page 3

4 Ordering Details Level Switch LFFS Safety Standard Ex ia IIC T5, ATEX II G (Gas) Ex td A0 IP67 T00 C, ATEX II D (Dust) Ex na II T5, ATEX II 3G Electrical Connection Plug, M Cable gland, M6 brass Cable gland, M6 Polyamid Process Connection G/, PEEK tip, 3A conform, Note{} 3A/DN38 Hygienic connection, 3A conform, Note {} G/, PEEK tip, sliding connection, 00 mm adjustable, incl. washer ring kit G/, PEEK tip, sliding connection, 50 mm adjustable, incl. washer ring kit Configuration Confi guration according to customer specifi cations The washer ring kit for sliding connection, type no Can be ordered separately. Baumer recommended to replace this kit if deformed. 5 digit 6 digit 7 digit 8 digit LFFS xxx (c) c Cable type no.: pol M plug with 5m cable pol M angle plug wiht 5m cable M plug female with screw terminals Adaptor cable M for FlexProgrammer 970 3A Conformity Note {}: The 3A mark is valid only when the product is mounted in a 3A marked counter part and installed according to the installation manual. Use also a 3A marked Oring or gasket if relevant. The 3A marked products conforms to the 3A Sanitary Standard criteria. Materials and surfaces fulfi ll the FDA demands and follow the EHEDG guidelines regarding design, materials and fi nishing. Level Switch LFFS, example EPDM Orings supplied with 3A marked products are conform to Sanitary Standard Class II (8% milk fat max.) EPDM gaskets supplied with 3A marked products are conform to Sanitary Standard Class I (8% milk fat max.) Refer to the 3A marked counter parts in the data sheet Accessories Universal. PEEK natura Angle > 35 deg. Configuration FlexProgrammer 970 Red clip Accessories Black clip Note: Ambient temperature range C The FlexProgrammer 970 is a dedicated tool to confi gure all Baumer confi gurable Flexproducts. Disconnect the power supply before connecting the FlexProgrammer 970 to the Level Switch LFFS Type No comprises: FlexProgrammer interface unit CD with the FlexProgram software and product drivers (DTM) USB cable Cable with alligator clips Page 4

5 The Sliding Connection (Figure ) ) External length of sliding connection Insulation ) 4) Lumpy or sticky media 3) The drawing shows how the sliding connection can be used for at least 4 applications: ) Mounted at the top of a tank to adjust to a maximum level. ) Serving as a cooling neck in high media temperature applications. 3) Adjusted to place the sensor tip deeper inside the tank. 4) To reach in through insulation material. It is essential that the max. ambience temperature for the electronics is never exceeded. For ATEX approved products please refer to table. The working conditions for the sliding connection in different media temperatures and specifi ed ambient temperatures can be found in curve. Media Temperature C Example, how to read Curve : A 50 mm sliding connection is mounted in a tank with a total insert length of 50 mm. Hence the external length of the sliding connection will be = 00 mm. The media temperature will be max. 60 C. Read the xaxis at 00 mm an the yaxis at 60 C and fi nd that the ambient temperature must be kept below 40 C. In case the radiated heat from the tank will cause a higher ambient temperature at the housing effi cient insulation of the tank must be established. Media Temperature versus External Length of Sliding Connection (Curve ) T amb max. 40 C T amb max. 60 C T amb max. 75 C T amb max. 85 C External length of sliding connection (mm) See figure NB: Std. 3A/DN38 = 35 mm external length Page 5

6 Accessories Overview LFFSxx LFFSxx LFFSxx3/4 CAM0x MAM0xxxx PM0x Welding part 3A/DN38 hygienic and VAM 0x LAM00 PM0 Please refer to the data sheet FlexBar Accessories for these accessories. SAM0005 PM0x RAM00 PM05 RAM00 Please refer to the data sheet Accessories Universal for these accessories. Page 6

7 Ex ia G Installation A Level Switch LFFSxx is Ex ia IIC T5, ATEX II G approved for application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing guidelines for zone 0 with a barrier. Ex td Installation A Level Switch LFFSxx is Ex td A0 IP67 T00 C, ATEX II D approved for application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing guidelines for zone 0 without a barrier. Ex na Installation A Level Switch LFFS3xx is Ex na II T5, ATEX II 3G approved for application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing guidelines for zone without a barrier. Conditions for ExCertification (Table ) Connection Type Tamb C Media Temp. max. C Note Std. & 3A/DN {} {} Sliding 00 mm {} {} Sliding 50 mm {} {} {3} Note {}: Provided that the sensor tip at the instrument is the only part in contact with the media. Note {3}: Max. allowed media temperature. Page 7

8 UK/00077 This data sheet may only be reproduced in full. Page 8