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Summary of Contents for Schmidt SS 20.415 LED
- Page 1 ® SCHMIDT Flow Sensor SS 20.415 LED Instructions for Use...
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Page 2: Table Of Contents
Service information ................ 16 Technical data ................18 Declarations of conformity ............. 19 Imprint: Copyright 2022 SCHMIDT Technology GmbH All rights reserved Version: 551742.02D Subject to modifications ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 2... -
Page 3: Important Information
2). In particular, it is not designed for direct or indirect protection of personal and 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 unit. -
Page 4: Application Range
2 Application range ® The SCHMIDT Flow Sensor SS 20.415 LED (551490) is designed for stationary use in cleanrooms under atmospheric pressure conditions and clean environmental conditions. The sensor measures the flow velocity of the measuring medium as stand- ard velocity (unit: m/s) relative to standard conditions of 1,013.25 hPa... -
Page 5: Mounting Instructions
Only the torsional angle of the sensor arm (parallel to ceiling) has to be aligned. Then tighten the assembly screw using the key wrench until the sensor is secured against twisting (hold sensor, if necessary). ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 5... - Page 6 (deviation > 1 %). After finishing adjustment tighten the assembly screw using the fork wrench until the sensor is secured against twisting. ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 6...
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Page 7: Electrical Connection
4 Electrical connection Plug-in connector ® The SCHMIDT Flow Sensor SS 20.415 LED is equipped with a plug-in connector firmly integrated in the housing. The connector has the following data: Number of connection pins: 7 (plus shield connection on the metallic housing) - Page 8 EN 50178) has to be considered. Operating voltage ® The SCHMIDT Flow Sensor SS 20.415 LED is protected against a po- larity reversal of the operating voltage. It has a nominal operating voltage range of U = 24 V ±...
- Page 9 The specific resistance of the lead of the nominal cable (0.14 mm at L = 10 m a current of I = 150 mA can cause a voltage drop up to 240 mV. B,max ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 9...
- Page 10 Switching outputs ® The SCHMIDT Flow Sensor SS 20.415 LED is equipped with two cur- rent limited and short-circuit proved switching outputs with following tech- nical data: Type: Low side driver, open collector Maximum switching voltage U 26.4 V S,max Maximum switching current I 55 mA (typ.
- Page 11 30 V, negative impulses are short-circuited against GND (conducting-state voltage of a diode). Basic current of the switching transistor can be neglected. Transient Voltage Suppressor diode ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 11...
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Page 12: Signalizing
5 Signalizing Analog output ® The following is valid for all output versions of the SCHMIDT Flow Sen- sor SS 20.415 LED: Representation of measuring range: The measuring range of the flow velocity (0 … w or ±w ) is... - Page 13 Response time (damping of measured values): By default the response time of flow measurement is 1 s. Optionally it could be configured in the range of 0.01 … 10 s. ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 13...
- Page 14 (ordering). By default the middle of the positive measuring range is considered as the threshold value. Error signaling: Both switching outputs are conducting independent of their configured switching polarity ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 14...
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Page 15: Startup
6 Startup ® The SCHMIDT Flow Sensor SS 20.415 LED is ready within 5 seconds after switch-on. If the sensor has a temperature different from that of the place of use, this time will increase until the sensor has reached ambient temperature. -
Page 16: Service Information
Inappropriate cleaning agents may leave residues on the sen- sor element and therefore lead to faulty measurements or re- sult in permanent damage to the sensor element. ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 16... - Page 17 To do so, the sensor must be sent in to SCHMIDT Technology. Spare parts or repair No spare parts are available, since a repair is only possible at SCHMIDT Technology. In case of defects, the sensors must be sent in to the sup- plier for repair.
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Page 18: Technical Data
150 / 270 mm x 300 mm - Screw nut Stainless steel 1.4404 Under reference condition Including all signal output currents Only with correctly attached connecting cable ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 18... -
Page 19: Declarations Of Conformity
10 Declarations of conformity SCHMIDT Technology GmbH herewith declares in its sole responsibility, that the product SCHMIDT Flow Sensor SS 20.415 LED Part-No. 551 490 is in compliance with the appropriate European guidelines and standards UK statutory requirements and designated standards. - Page 20 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 www.schmidttechnology.de ® Instructions for Use - SCHMIDT Flow Sensor SS 20.415 LED Page 20...
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