liquid level transmitter (float type) data sheet fnf features this is a liquid level transmitter utilizing an induction potentiometer. the vertical displacement of a flat on a liquid surface in an open tan k is conveyed by a strip of stainless steel wire rope to the transmitter body, and inputted as a rotating angle to the induction potentiometer which transmits a signal current of 4 to 20ma dc proportionate to the displacement of the liquid level. 1. high reliability use of a contactless induction potentiometer means a long life and high reliability of the instrument. 2. various specifications available the transmitter can be provided with intrinsically safe explosionproofing, various materials for its components, an arrester, an alarm unit plus other specs. 3. the operating principle and structure of the transmitter are simplified which enables easy handling, maintenance and inspection. measuring range: 0 to 0.540m (refer to standard measuring ranges) indicator: digital type (4 digits) allowance: 1.0% or 0.5% on request output signal: 4 to 20ma dc ripple content: 1.5% p-p (at approx. 25khz) allowable load resistance: 0 to 550 ? (at 24v dc) power supply: 13 to 33v dc (26v dc or less with intrinsically safe explosionproofing) (27v dc or less with arrester) 100v/24v 10% , ac 50/60hz (see "example of configuration") wiring method: 2-wire type ambient temperature: ?0 to +80 c (but not usable in freezing condition) 50 c max. with intrinsically safe explosionproofing 60 c max. with arrester ambient humidity: less than 95% rh liquid temperature : less than 45 c (when float material is pvc-vinyl chloride-) materials: float; hard pvc or sus304 (stainless steel) rope: teflon coating on stainless steel wire counterweight; iron piece coated with zinc metallikon or sus304 instrument body; aluminum alloy conduit connection: g3/4 case: splash-proof type (jis c 0920) arrester: built in on request explosionproof structure: intrinsically safe explosion- proofing i3ng5 mass {weight}: approx. 10.5kg (excluding float and counterweight) external dimensions (h w d): approx. 320 346 218mm finish color: silver (melamine paint); may be provided with acid and alkaliproof treatment optional attachment: alarm unit (limit switch) (alarm unit can't be installed with intrinsically safe explosionproof) structure); contact capacity 250v ac 5a 230/115v dc 0.2/0.4a n.o.-1a- contact 3 pieces are available in the transmitter for upper limit and lower limit specifications date EDS7-3I july. 18, 2006
fnf 2 connection diagrams installation diagram ordering information range of delivery: transmitter and standard accessories (rope, float, and counterweight) standard measuring ranges 0 to 0.5m 0 to 1.5m 0 to 2.0m 0 to 2.5m 0 to 3.0m 0 to 3.5m 0 to 4.0m 0 to 4.5m 0 to 5.0m 0 to 5.5m 0 to 6.0m 0 to 6.5m 0 to 7.0m 0 to 8.0m 0 to 9.0m measuring ranges measuring ranges measuring ranges measuring ranges 0 to 10.0m 0 to 12.0m 0 to 14.0m 0 to 15.0m 0 to 16.0m distributor 1. object to be measured ro application 2. product name 3. code symbols 4. measuring range 5. rope lenght 6. float, counterweight meterial 7. whether or not any attachments (guide pulley, alarm unit, etc.) are required 8. whether or not wxplosionproofing and other measures are required 9. other matters that demand care related device 12345678 910111213 description fnf 4 1 lenght of rope [m] 5 10 15 20 25 30 40 50 60 80 float material pvc sus304 (stainless steel) counterweight material steel sus304 (stainless steel) transmitter 4 to 20ma 4 to 20ma intrinsically safe explosionproof structure arrester with "a" alarm unit (limit switch) note: impossible when "b" specified in 7th dight of code. none upper.lower limit, 1 piece each upper.lower limit, 2 pieces each upper.lower limit, 3 pieces each guide pulley none provided with 1 pulley provided with 2 pulleys provided with 3 pulleys allowance 1% (standard instrument) 0.5% (high allowance instrument) treatment standard acid and alkaliproof treatment chlorine-proof treatment a b c d e f g h j k v s e s a b k 0 2 4 6 0 1 2 3 0 1 * * y b d codesymbols
3 principle of induction potentiometer example of configuration with 24v dc power supply with 100v/24v ac power supply when the short circuit ring is positioned at the center, the magnetic flux at left and right sides is equal and the voltages produced at detecting coils s 1 and s 2 are equal. but if the ring rotates to the right side for example, then the flux at s 1 will increase and that at s 2 will decrease. according to this difference an output voltage is provided which is proportional to the ring displacement (input rotating angle). o- o+ i- i+ o- o+ + -
approx. 218 45 20 332 180 100 50 31 27 14 approx. 160 pulley 15 float counterweight stopper 2- 18 holes 280 318 320 "a" conduit connection (2 pieces) details of "a" ?0 8 16 g 3/4 guide approx. 276 approx. 277 18 guide 16 30 250 21 38 262 216 5 175 140 3.5 hole 216 3.5 hole 150 185 sus304 (stainless steel) float hard pvc counterweight transmitter asterisked (*) items: non-standard. fnf 262 information in this catalog is subject to change without notice. printed in japan head office gate city ohsaki, east tower, 11-2, osaki 1-chome, shinagawa-ku, tokyo 141-0032, japan http://www.fesys.co.jp/eng instrumentation 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 caution on safety *before using this product, be sure to read its instruction manual in advance.
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