EDS7-11D

IMMERSION TYPE LEVEL METER DATA SHEET This level meter is used for measuring the level of underground water, river, clean water, sewage or industrial waste water. It measures the level in the from of water head pressure, converts it into a current signal and then transmits it to a receiving instrument. The detector is either suspended in the water or placed on the bottom of the water. The water head pressure acting on the diaphragm is measured via a diffusion type silicon strain gage. Transmitter FQK FEATURES 1. Compact, lightweight and highly reliable Use of a diffusion type silicon strain gage in the pressure receiving section makes the instrument compact, lightweight, and strong against vibration and shock, and it can be installed anyplace. 2. Easy to install Since the detector is small and light, it can be readily lowered into or lifted out of the water via a cable; use of a chain is unnecessary. For placing it at the bottom of the water, the detector can be attached to a stand to keep it stable. 3. Easy to install The construction of the instrument enables easy adjustment of zero point, span and damping in the field. 4. Usable for any kind of water This level meter can be used for clean water, sewage water, industrial water, agricultural water, industrial waste water, river water or underground water etc. 5. Arrester is builted-in. Damping: Detector Power supply: 24V± 10%DC, 0.48W (100V or 24V± 10%AC, 50/60Hz, is also usable. See “Example of configuration”.) Wiring system: 2-wire system Liquid temperature: 0 to 30˚C Ambient temperature: -20 to +60˚C Ambient temperature: Less than 90% RH No damping, or damping with time constant of 0.8, 2.2, 6 sec; selectable in 4 steps Zero adjustment, span adjustment width:+1.5m Upper limit of span: 30 m SPECIFICATIONS Measuring range: 0 to 3, 5, 10, 20, 30m Material: (water density: level message of “one”) Detector; Pressure receiving diaphragm 316L stainless steel Other wetted parts 304 stanless steel Cable Stand Transmitter: PVC covering 304 stainless steel ( Lower limit of span: 3 m ) Transmitter waterproof structure: JIS C 0920 immersion-proof type External dimensions: Detector: φ43 x 185mm Transmitter(H x W x D); 110 x 160 x 185mm Mass {weight} approx: Detector; 0.8 kg Transmitter; 3.5 kg Cable; 0.3 kg/m Mounting method: Detector; Suspended in water or placed at water bottom Aluminum alloy (epoxy-polyurethan double coating, silver) (Field indicator cover; black N3) Output signal: 4 to 20 mA DC Allowable load resistance: 0 to 550Ω(at power supply of 24V DC) EDS7-11d Date July. 20, 1994 FQK Transmitter; Mounted horizontally or vertically on 50A(2B) pipe with U-boit Conduit connection: JIS G1/2 Arrester: Built in Protective perfomance: Voltage limit; Between lines: 50V or less For earth and line: 200V or less Operation delay; Less than 0.5µs Max. discharge current; 8 x 20µs, 2000A Repetitive discharge; 400 times at 8 x 20µs, 100A 15 sec intervals Earthing resistance; Less than 100Ω Optional specifications Field indicator: Built in transmitter case, class 1.5, 0 to 100% linear scale or actual-value scale Detector stand: For installing detector at water bottom; 304 stainless steel, approx. 1.8 kg Characteristics Accuracy: ± 0.5% max.(under standard conditions) Sensitivty: ± 0.05% max. Allowable over-pressure: 150% of measuring range OPERATING PRINCIPLE OF DETECTOR CODE SYMBOLS 12345678 9 10 F QK W 2 Description 1 2 3 4 5 Measuring range [m] 0 to 3 0 to 5 0 to 10 0 to 20 0 to 30 Hollow cable length L [m] (total length=measuring range + L) Measuring range + 5 (basic) Measuring range + 10 Measuring range + 20 Measuring range + specified value (total length must be 100m or less) A D E Transmitter and flied indicator 4 to 20mA A with flied indicator (0 to 100% linear scale) A with flied indicator (m actual-value scale) 0 1 Y *B Option None With detector stand Treatment None Acid and alkali-proof treatment (transmitter and mounting parts) 1 *2 *3 *Z FUNDAMENTAL BLOCK DIAGRAM Detector Level (input pressure) Pressure receiving diaphragm Resistance Mesauring Silicon diaphragm, diffusion type strain gage change circuit Atmospheric pressure Voltage change Transmitter Zero and span adjusting circuit Conversion circuit (damping adjusy circuit) Arrester Output current OUTLINE DIAGRAM (Unit:mm) FQK EXAMPLE OF CONFIGURATION EXTER CONNECTION DIAGRAM + – E O– O+ RELATED DEVICES Opener Distributor Check terminals Hollow cable To detector Load 0 to 550Ω 24V DC ORDERING INFORMATION 1. Measuring object of application 2. Product name 3. Code symbols 4. Measuring range 5. Special specifications requirement 6. Other necessary items *Asterisked items; Non standard Caution on Safety *Before using this product, be sure to read its instruction manual in advance. Head Office 6-17, Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan http://www.fesys.co.jp/eng Sales Div. International Sales Dept. No.1, Fuji-machi, Hino-city, Tokyo, 191-8502 Japan Phone: 81-42-585-6201, 6202 Fax: 81-42-585-6187 http: //www.fic-net.jp/eng Information in this catalog is subject to change without notice. Printed in Japan