Flow Sensors - Proxitron GmbH - #5

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Air Flow Controller FKM 230.18 G S4 17.11.98 Details are subject to change without notice. WG 800 Proxitron GmbH - Gärtnerstr. 10 - D-25335 Elmshorn - Tel. 04121/2621-0 - Fax. 04121/24404 - mail@proxitron.de F22E This air flow controller controls two independently adjustable limit values upto a flow velocity of 30 m/s. Short-circuit-proof normally open and normally close outputs as well as two-colour LEDs indicate when the values exceed or fall below the desired range. So troubles such as flow failure, hose rupture and required exchange of filter can be monitored in installations of inflow technique. Normally open (LED and potentiometer at the left, 20 pitches): output connected through and given green light at min. flow existing; red LED flow failure. Normally close (LED and potentiometer at the right, 20 pitches): output connected through and LED giving green light at value fallen below the max. flow; red LED = flow too high. Technical Data Type FKM 230.18 GS4 Art.-Nr. 8041A Output PNP n. o. + n. c. Adjusting range normally open 1 - 30 m/s Adjusting range normally close 8 - 30 m/s Measuring principle calorimetric Response time < 10 s Readiness delay after applying the supply voltage both outputs are connected 30 s during this time both LEDs give green intermittent light. Supply voltage 24 V DC +10 / -15% Ripple voltage max. 15% Load current max. 0 - 400 mA Short-time load current 4 A / 100 ms Short circuit protection yes, pulsing No-load current 50 mA Voltage drop 1,5 V Switching hysteresis 0,5 - 2 m/s Ambient temperature -10 ... +60 °C Protection class IP 65 Connection plug Lumberg M12 Function display 2 LEDs 2-colour Housing material sensor part electronic part with flange plastic aluminium Weight 200 g The air flow controller is mounted in such a way that the air can flow onto the plane measuring surface (diameter 20 mm) from random direction. For effective temperature compensation the cylindrical part must be exposed to the same ambient temperatures 30 mm upto the measuring surface. Quick changes of temperature can result in misswitchings for a short time. Diagram of Connections