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Содержание 506690

Страница 1: ...SCHMIDT Flow Sensor SS 20 260 Instructions for Use ...

Страница 2: ... 2 Application range 4 3 Mounting instructions 4 4 Electrical connection 11 5 Signalization 12 6 Startup 14 7 Information concerning operation 15 8 Service information 16 9 Technical data 18 10 Declaration of conformity 19 Imprint Copyright 2020 SCHMIDT Technology GmbH All rights reserved Version 508981 02H Subject to modifications ...

Страница 3: ...tions described in these instruc tions for use will forfeit any warranty and exclude any liability The unit is designed exclusively for the use described below see chapter 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 certain purpose and cannot be held liable for accidental or seq...

Страница 4: ... precision instrument with high measuring sensitivity In spite of the robust construction of the sensor tip soiling of the inner sen sor elements can lead to distortion of measurement results see also chap ter 8 During procedures that could yield soiling like transport mounting or dismounting of the sensor it is recommended to place the enclosed SCHMIDT Technology protective cap on the sensor tip ...

Страница 5: ...lways position the sensor head if possible in the middle of the pipe or shaft Installation with low disturbance Local turbulences of the medium can cause distortion of measurement results Therefore appropriate mounting conditions must be guaranteed to ensure that the gas flow is supplied to the sensor in a quiet state and low in turbulence in order to maintain the accuracy specified see chapter 9 ...

Страница 6: ...it is not pos sible to observe the specified abatement distances increased deviations of the measurement results are to be expected or it is necessary to take additional measures4 The profile factors specified in Table 2 may become void by the use of flow rectifiers Calculation of volume flow If the cross section area of the pipe is known the output signal of the flow speed wN can be used to calcu...

Страница 7: ... 0 817 10 4 130 1 040 2 599 180 182 5 0 825 15 5 194 1 554 3 885 200 200 8 206 5 0 829 20 0 250 1 999 4 998 250 10 260 4 0 835 32 0 400 3 202 8 004 300 300 12 309 7 0 840 45 6 570 4 556 11 390 350 14 339 6 0 842 54 9 686 5 491 13 728 400 400 16 389 0 845 72 2 903 7 223 18 058 450 450 18 437 0 847 91 5 1 143 9 147 22 867 500 500 20 486 0 850 114 1 419 11 353 28 383 600 600 24 585 0 854 165 2 066 16...

Страница 8: ...ion depth in this case and this method requires access from both sides for operation Drill a bore in the wall with 13 14 mm diameter Carefully insert measuring probe with an attached protection sleeve into the bore so that the mounting block of the enclosure is in contact with the wall Screw on the enclosed fastening nut by hand on the medium side turn sensor into required position and tighten fas...

Страница 9: ...ead G resp Rp centered above the mounting opening of the pipe Recommended length of sleeve 15 40 mm If necessary wrap thread of through bolt joint with common sealing tape for example made of PTFE Screw thread of through bolt joint by hand into connecting piece then tighten it firmly with a fork wrench SW27 Remove spigot nut of through bolt joint and extract both seal halves Remove protective cap ...

Страница 10: ...angular position carefully for example by means of a spirit level at the octagonal part of the sensor enclosure Angular deviation should not be greater than 3 relative to the ideal measuring direction Otherwise the measurement accuracy may be affected In case of wrong adjustment the through bolt joint has to be loosened and the alignment procedure must be repeated Mounting accessories Type art no ...

Страница 11: ... 10 It is protected against a polarity reversal typical operating current is 40 mA at maximum 60 mA7 Only operate sensor within the defined range of operating volt age 24 V DC 10 Undervoltage may result in malfunction overvoltage may lead to irreversible damage to the sensor The specifications for the operating voltage are valid for the internal con nection of the sensor Voltage drops generated du...

Страница 12: ...ted to a maximum of 10 nF 5 Signalization Light emitting diodes The sensor is equipped with 2 light emitting diodes LED indicating its functional state Figure 5 Operating state LED 1 LED 2 Supply voltage none wrong polarity too low Sensor ready for operation Supply voltage beyond specification range or Medium temperature beyond specification range Sensor defective Table 5 LED off LED flashes appro...

Страница 13: ...nstant Voltage output wN Current interface wN 𝑤𝑁 𝑤𝑁 𝑚𝑎𝑥 10 𝑉 𝑈𝑂𝑢𝑡 𝑤𝑁 𝑤𝑁 𝑤𝑁 𝑚𝑎𝑥 16 𝑚𝐴 𝐼𝑂𝑢𝑡 𝑤𝑁 4 𝑚𝐴 Figure 6 Representation for flow velocity Representation of medium temperature The measuring range of the medium temperature is 20 to 120 C Figure 7 Falling below this temperature is still output in a linear way down to 30 C 3 mA going deeper the signal remains constant An exceeded temperature is outp...

Страница 14: ...ing of the fastening screw of the through bolt joint Correct electrical connection in the field switch cabinet or similar Prior to startup the sensor check mounting and electrical con nection Five seconds after switch on the sensor is ready for operation If the sen sor has another temperature than the ambient this time is prolonged until the sensor has reached its ambient temperature If the sensor...

Страница 15: ...le connected cor rectly Supply voltage connected to control Supply cable broken Power supply unit large enough IwN ITM 0 mA Sensor element defective Send in sensor for repair IwN ITM 2 mA Operating voltage beyond specifi cation range too low high Medium temperature beyond spec ification range too low high Check operating voltage and set it correctly Check medium temperature and set it correctly Iw...

Страница 16: ...tem During manual cleaning proceed with great care In case of persistent deposits the sensor chip as well as the interior of the chamber head can be cleaned carefully by using residue free drying alco hol e g isopropyl alcohol or soapy water with special cotton swabs Figure 8 Suitable cotton swabs with small cleaning pads For this purpose cotton swabs that have small soft cotton pads are suita ble...

Страница 17: ...f the sensor Before transport or shipment of the sensor the delivered protective cap must be placed onto the sensor tip Avoid soiling or mechanical stress Calibration If the customer has made no other provisions we recommend repeating the calibration at a 12 month interval To do so the sensor must be sent in to the manufacturer Spare parts or repair No spare parts are available since a repair is o...

Страница 18: ...120 C 0 70 C Humidity range 0 95 rel humidity RH non condensing Operating pressure Atmospheric 700 1 300 mbar Operating voltage UB 24 VDC 10 reverse voltage protected Current consumption Typ 40 mA 60 mA max Analog outputs Voltage output Current output Maximum load capacity 1 or 2 pcs short circuit protected 0 10 V RL 10 k 4 20 mA RL 300 10 nF Electrical connection Non detachable connecting cable p...

Страница 19: ...Instructions for Use SCHMIDT Flow sensor SS 20 260 Page 19 10 Declaration of conformity ...

Страница 20: ...r Use SCHMIDT Flow sensor SS 20 260 Page 20 SCHMIDT Technology GmbH Feldbergstraße 1 78112 St Georgen Germany Phone 49 0 7724 899 0 Fax 49 0 7724 899 101 Email sensors schmidttechnology de URL www schmidt sensors com ...

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