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Summary of Contents for Schmidt SS 20.260
- Page 1 ® SCHMIDT Flow Sensor SS 20.260 Instructions for Use...
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Page 2: Table Of Contents
Information concerning operation ..........15 Service information ................ 16 Technical data ................17 EC Declaration of conformity ............18 Imprint: Copyright 2011 SCHMIDT Technology GmbH All rights reserved Version 508981.02E Subject to modifications Instructions for Use SS 20.260 Page 2... -
Page 3: Important Information
2). In particular, it is not designed for direct or indirect per- sonal protection. SCHMIDT Technology cannot give any warranty as to its suitability for certain purpose and cannot be held liable for accidental or se- quential damage in connection with the delivery, performance or use of this unit. -
Page 4: Application Range
The SCHMIDT® flow sensor SS 20.260 is designed for the use inside closed rooms and is not suitable for outdoor use. 3 Mounting instructions General information on handling The SS 20.260 is a precision instrument with high measuring sensitivity. - Page 5 (see Figure 2) is held absolutely straight and without dis- turbances (such as edges, seams, bends etc.). It is also necessary to pay attention to the design of the run-out distance because disturbances also generate turbulences against the flow direction. Instructions for Use SS 20.260 Page 5...
- Page 6 Thus, it is possible to calculate the standard volumetric flow of the medi- um using the measured standard flow velocity in a pipe with known inner diameter: Alternatively flow rectifier could be used, e.g. honeycomb ceramics Considers parabolic flow profile and sensor obstruction Instructions for Use SS 20.260 Page 6...
- Page 7 0.847 91.5 1.143 9.147 22.867 0.850 1.419 11.353 28.383 0.854 2.066 16.527 41.317 0.857 2.834 22.673 56.683 0.859 3.723 29.781 74.452 0.862 4.740 37.920 94.800 1000 1000 0.864 5.865 46.923 117.308 Table 2 Instructions for Use SS 20.260 Page 7...
- Page 8 3,6E+06 Table 3 SCHMIDT Technology provides a convenient calculation tool to com- pute flow velocity or volume flow in pipes for all its sensor types and measuring ranges. This “Flow Calculator” can be directly used on or downloaded from SCHMIDT homepage: http://www.schmidttechnology.de/de/sensorik/download/FlowCalculator.zip...
- Page 9 Insert probe in threaded part of the compression fitting, attach poetry halves and screw on fitting nut manually to such an extent that sen- sor probe can be inserted without jamming. Instructions for Use SS 20.260 Page 9...
- Page 10 Compression fitting - Immersion sensor Brass - Pipe (typ.), wall - Screwing into a welding 517 206 stud - Material: Brass PTFE, NBR SW24 Atmospheric pressure use! SW27 Table 4 Must be welded Instructions for Use SS 20.260 Page 10...
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Page 11: Electrical Connection
2 current interfaces. Either type of analog outputs exhibits permanent short-circuit protection against both rails of the operating voltage U It is recommended, to use AGND as measuring reference potential for tension output. Instructions for Use SS 20.260 Page 11... -
Page 12: Signalization
Ready for operation Supply voltage too high Medium temperature beyond specification range Sensor defective Table 6 LED off LED flashes (approx. 2 Hz): green LED on: green LED flashes (approx. 2 Hz): red Instructions for Use SS 20.260 Page 12... - Page 13 For a correct temperature measurement, the flow velocity on the sensor head must be > 2 m/s. An excessive tem- perature value is output if flow velocity is < 2 m/s. In accordance with NAMUR specification Instructions for Use SS 20.260 Page 13...
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Page 14: Startup
6 Startup ® Prior to switching on the SCHMIDT flow sensor SS 20.260, the follow- ing checks have to be carried out: Immersion depth of the sensor probe and alignment of the housing ... -
Page 15: Information Concerning Operation
Check the voltage supply fluctuating Mounting conditions: Check mounting conditions Sensor head is not in optimal position Run-in/run-out distance is too short Strong fluctuations of pressure or Check operating parameters temperature Table 7 Instructions for Use SS 20.260 Page 15... -
Page 16: Service Information
Every new sensor is accompanied by a certificate of compliance accord- ing to EN10204-2.1. Material certificates are not available. Upon request, we shall prepare, at a charge, a factory calibration certifi- cate, traceable to national standards. Instructions for Use SS 20.260 Page 16... -
Page 17: Technical Data
Table 8 Under alignment conditions and with regard to the reproducibility of the reference Error messaging: 2 mA; exceeding measuring range: up to 22 mA With cable end sleeves **** According EN 50178 Instructions for Use SS 20.260 Page 17... -
Page 18: Ec Declaration Of Conformity
10 EC Declaration of conformity Instructions for Use SS 20.260 Page 18... - Page 19 Notes: Instructions for Use SS 20.260 Page 19...
- Page 20 SCHMIDT Technology GmbH Feldbergstrasse 1 78112 St. Georgen / Germany Phone +49 (0)7724 / 899-0 +49 (0)7724 / 899-101 sensors@schmidttechnology.de www.schmidttechnology.de Instructions for Use SS 20.260 Page 20...
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