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Summary of Contents for Schmidt SS 20.651
- Page 1 ® SCHMIDT Flow Sensor SS 20.651 Instructions for Use...
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Page 2: Table Of Contents
Commissioning ................15 Service information ................ 16 Dimensions ..................20 Technical table ................21 Declaration of conformity ............... 23 Imprint: Copyright 2016 SCHMIDT Technology GmbH All rights reserved Version: 547608.02B Subject to modifications Instructions for Use SS 20.651 page 2... -
Page 3: Important Information
2). In particular, it is not designed for direct or indirect protec- tion of personal or machinery. SCHMIDT Technology cannot give any warranty as to its suitability for a certain purpose and cannot be held liable for errors contained in these instructions for use or for accidental or sequential damage in connection with the delivery, performance or use of this device. -
Page 4: Mounting
35 x D 5 x D change in direction) 45 x D 5 x D Shut-off valve Table 1 Minimum measuring distances depending on the flow obstacles Minimum inner pipe diameter: 25 mm Instructions for Use SS 20.651 page 4... - Page 5 Mounting method The SS 20.651 is mounted by means of a through-bolt joint (included by delivery) which clamps the sensor probe frictionally. Due to the different operating conditions (temperature and pressure range), there are differ- ent types (see Table 2): Max.
- Page 6 General note: Do not use the aligning surface of the housing for mechanical alignment, such as locking. There is a risk of damage to the sensor. Deviations > 1% of the measured value Instructions for Use SS 20.651 page 6...
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Page 7: Electrical Connection
GND of the operating voltage within the sensor. The specified wire colors are valid using a connecting cable delivered by ® SCHMIDT The appropriate protection class III (SELV) respective PELV (EN 50178) has to be considered. Instructions for Use SS 20.651 page 7... - Page 8 R , which can lead to measur- ing errors. For the voltage mode, a measuring resistance of at least 10 k is recommended. The maximum load capacity C is 10 nF. Instructions for Use SS 20.651 page 8...
- Page 9 Figure 4 below. Modus Mode R [ ] Figure 4 Depending on the set output signal, accuracy of the switching point detection can be reduced. Therefore, it is recommended to select the Instructions for Use SS 20.651 page 9...
- Page 10 Table 5 Representation specification for flow measurement The measuring range of the medium temperature T starts at 0 °C and reaches up to T = 200 / 350 °C (see Table 6). M,max In accordance with the Namur specification Instructions for Use SS 20.651 page 10...
- Page 11 (0 V or 2 mA). The signal output for T switches, contrary to standard error signaling, directly to the maximum values of 11 V resp. 22 mA. The switching hysteresis for decision threshold is approx. 5 K. Instructions for Use SS 20.651 page 11...
- Page 12 300 ms with interconnection phases of approx. 100 µs). The maximum load capacitance C is 10 nF. A higher capacitance reduces the limit of the current limiter. Overcurrent peaks are absorbed by the short circuit limiter. Instructions for Use SS 20.651 page 12...
- Page 13 Protective measures for incorrect wiring or overload are not taken for this output. Transient Voltage Suppressor Diode, breakdown voltage approx. 30 V, peak pulse capac- ity 4 kW (8 / 20 µs) Instructions for Use SS 20.651 page 13...
- Page 14 If an error occurs, 0 Hz or no pulses will be output. The current initial state remains unchanged. Note: The relay can be used as a S0-Interface according DIN 43 864. Instructions for Use SS 20.651 page 14...
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Page 15: Commissioning
Electronics temperature too low Medium temperature too low Medium temperature too high List of abbreviations LED off LED on: orange LED on: green LED flashes (approx. 2Hz): red Table 7 LED signals of sensory functions Instructions for Use SS 20.651 page 15... -
Page 16: Service Information
(calibration). Ideally, the entire characteristic line of the sensors should be calibrated by SCHMIDT Technology. If the maintenance is performed not properly or not at the re- quired intervals, the warranty will be rendered. - Page 17 Before putting the sensor head into operation again, wait until it is com- pletely dry. The drying process can be accelerated by careful blowing off. If this procedure does not help, the sensor must be sent to SCHMIDT Technology for cleaning or repair.
- Page 18 Load resistance of signal Connect load resistance to manently at maximum output connected to +U AGND Analog signal voltage per- Error signaling Eliminate errors manently at zero Short circuit against (A)GND Eliminate short circuit Table 8 Instructions for Use SS 20.651 page 18...
- Page 19 Every new sensor is accompanied by a certificate of compliance accord- ing to EN 10204-2.1. 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 20.651 page 19...
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Page 20: Dimensions
7 Dimensions Compact sensor Figure 9 Remote sensor (including wall mounting bracket) Figure 10 Instructions for Use SS 20.651 page 20... -
Page 21: Technical Table
Probe: IP54, housing: IP65 Probe length L 250 / 400 / 600 / 1000 mm (both versions) Selectable: 1 … 10 m (in steps of 10 cm) Cable (remote connection) * Under reference conditions Instructions for Use SS 20.651 page 21... - Page 22 / 21 V / 50 mA AC,eff Standard connection Housing connector Plug-in connector M12, 8-pin, male, screwed Maximum cable length Voltage signal: 15 m Current/ impulse signal: 100 m Table 9 Error signal: 2 mA Instructions for Use SS 20.651 page 22...
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Page 23: Declaration Of Conformity
9 Declaration of conformity Instructions for Use SS 20.651 page 23... - Page 24 SCHMIDT Technology GmbH Feldbergstraße 1 78112 St. Georgen Germany Phone +49 (0)7724 / 899-0 +49 (0)7724 / 899-101 Email sensors@schmidttechnology.de www.schmidt-sensors.com Instructions for Use SS 20.651 page 24...
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