EDS7-4F

HEIGHT TRANSMITTER DATA SHEET This is a height transmitter utilizing an induction potentiometer. A wire rope is placed atop the gas holder whereby the lift of the holder moves the rope which in turn rotates the pulley. This motion is conveyed to the induction potentiometer which then provides a current signal of 4 to 20mA DC proportional to the holder lift. FNG FEATURES 1. High reliability A contactless induction potentiometer is employed which assures 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 and other specifications. SPECIFICATIONS Measuring range: 0 to 0.5.........40 m (If equipped with a reduction gear, the range of measurement can be increased up to 320m) Standard range of measurement: As listed in table on page 2 Indicator: Digital type (4 digits) Allowance: ± 1.0% Output signal: 4 to 20mA DC Ripple content: 1.5% peak to peak (at approx. 25 kHz) Allowable load resistance: 0 to 550Ω (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 AC ± 10%, 50/60 Hz (see "Example of configuration" on page 5) Ambient temperature: –30 to +80°C (Not usable in freezing condition) 50°C max. with intrinsically safe explosionproofing 60°C max. with arrester Ambient humidity: Less than 95% RH Principal materials: Wire rope; stranded mild steel wire or stranded stainless steel wire Counterweight; iron or stainless steel Instrument body; aluminum alloy Conduit connection: G3/4 Case: Splash-proof type (JIS C 0920) Arrester: Built-in on request Explosionproof structure: Intrinsically safe explosionproofing i3nG5 Mass (weight): Approx. 10.5kg External dimensions (HxWxD): Approx. 320 x 346 x 218 mm EDS7-4f Date Apr. 10, 1992 FNG Finish color: Silver (melamine paint); acid and alkaliproof treatment is available, on request CODE SYMBOLS 12345678 9 10 11 12 F NG 4 Description Length [m] of 4mm dia. wire rope 10 15 20 25 30 40 50 60 Optional specifications Alarm unit (limit switch) (Cannot be installed on a transmitter equipped 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 Reduction gear (Employed for a range of measurement exceeding 40m) 2 3 4 5 6 7 8 *9 Y *A *B *C *D *E F H J K L M 0 *1 A B K Scope of delivery: Transmitter and standard accessories; (wire rope (4mm dia.), counterweight, guide pulley (3 pcs)) Reduction gear (reduction ratio 1:8), on request; (moving pulley, fixed pulley, intermediate counterweight and wire rope (6mm dia., length as requested)) Length [m] of 6mm dia. wire rope None (no reduction gear provided) 30 40 50 60 80 100 120 140 160 180 200 Reduction gear None (standard) Provided (for high lift) Transmitter 4 to 20mA 4 to 20mA intrinsically safe explosionproof structure "A" with arrester Alarm unit (limit switch) Note: Impossible when "B" specified in 7th digit of code. None Upper/lower limit, 1 piece each Upper/lower limit, 2 pieces each Upper/lower limit, 3 pieces each Material of counterweight Iron Stainless steel (SUS304) Material of rope Stranded mild steel wire Stranded stainless steel wire (SUS304) Y B Treatment Standard Acid and alkaliproof treatment List of standard measuring ranges Measuring range [m] 0 0 0 0 0 to to to to to 0.5 1.5 2 2.5 3 Measuring range [m] 0 0 0 0 0 to to to to to 3.5 4 4.5 5 5.5 Measuring range [m] 0 0 0 0 0 to to to to to 6 6.5 7 8 9 Measuring range [m] 0 0 0 0 0 to to to to to 10 12 14 15 16 0 2 4 6 E *S E *S Note: *items:Nonstandard 2 INSTALLATION INSTRUCTION Fig. 1 When normal lift Fig. 2 When high lift (with reduction gear) Composition Transmitter ---------Guide pulley -------4mm dia. rope ----Counterweight ---- 1 3 1 1 In Fig. 1: Transmitter mounting height HT [m] > H4 + 1.5m Rope length (4mm dia. stranded mild steel wire) H 1 + 6m L4 [m] Composition Transmitter ---------Guide pulley -------6mm dia. rope --Counterweight ---Fixed pulley --------Moving pulley ----Intermediate counterweight --4mm dia. rope ----- 1 3 1 1 1 1 1 1 In Fig. 2: Transmitter mounting height H [m] HT [m] > 4 + 1.5 [m] 8 Rope length (6mm dia. stranded mild steel wire) 2xH4 + 6 [m] L6 [m] Rope length (4mm dia. stranded mild steel wire) H4 [m] + 5 [m] L4 [m] 8 Where H 4 : Holder lift variation H 1 : Holder maximum height 3 FNG OUTLINE DIAGRAM (Unit:mm) 4 PRINCIPLE OF INDUCTION POTENTIOMETER When the short circuit ring is positioned at the center, the magnetic flux on left and right sides is equal and the voltages produced at detecting coils S1 and S2 are equal. But if the ring is rotated to the right side for example, then the flux at S1 will increase and that at S2 will decrease. According to this difference an output voltage is produced which is proportional to the ring displacement (input rotating angle). EXAMPLE OF CONFIGURATION ACCORDING TO POWER SUPPLY 5 FNG CONNECTION DIAGRAMS RELATED DEVICES Distributor (PTL) ORDERING INFORMATION 1. 2. 3. 4. 5. 6. 7. Object to be measured or application Product name Code symbols Measuring range Length of wire rope Material of counterweight Whether any attachments are required (reduction gear, alarm unit) 8. Whether explosionproofing and other treatment are required 9. Other matters that demand care 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