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Summary of Contents for Nohken FM-11
- Page 2 ・The specification of product mentioned in this manual may not be satisfied by the condition of environment and usage. Check and consider carefully before using. ・Contact to sales office at NOHKEN INC. for any question or comment about this manual and product.
- Page 3 (Follow the additional document and/or direction, submitted by NOHKEN INC. and our distributor or agent.) Turn off the power, before wiring and inspection. Otherwise, electric leakage, fire caused by short circuit, and electric shock may be occurred.
- Page 4 CAUTION Check and deeply consider the chemical compatibility for material of product in advance. The part especially float, which is very thin, may be malfunctioned by miner corrosion. Hold the stem very close to mounting point, when carrying, installing, and removing.
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Page 5: Warranty And Disclaimer
B) We are glad to suggest and advice for Model selection and chemical resistant of material, but final decision has to be made by the customer. C) This manual has prepared with close attention. Ask sales office at NOHKEN INC. for any question or comment about the contents of this manual. - Page 6 ＴＡＢＬＥ ＯＦ ＣＯＮＴＥＮＴＳ Page No. 1. PURPOSE OF USE ・・・・・・・・・・・・・・・・・・・・・・・・・ 2 2. PRINCIPLE OF OPERATING ・・・・・・・・・・・・・・・・・・・・・・・・・ 2 3. SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・ 3 3.1 Model and Suffix Code ・・・・・・・・・・・・・・・・・・・・・・・・・ 3 3.2 Standard Specifications ・・・・・・・・・・・・・・・・・・・・・・・・・ 3 3.3 Dimensions and internal circuit ・・・・・・・・・・・・・・・・・・・・・・・・・ 4 3.4 Switch and actuation level ・・・・・・・・・・・・・・・・・・・・・・・・・ 4 4. INSTALLATION ・・・・・・・・・・・・・・・・・・・・・・・・・ 5 4.1 Unpacking ・・・・・・・・・・・・・・・・・・・・・・・・・ 5 4.2 Installation location ・・・・・・・・・・・・・・・・・・・・・・・・・ 5 4.3 Installation method ・・・・・・・・・・・・・・・・・・・・・・・・・ 5 4.4 Installation attitude ・・・・・・・・・・・・・・・・・・・・・・・・・ 6 5. WIRING ・・・・・・・・・・・・・・・・・・・・・・・・・ 7 5.1 Technical notes of wiring ・・・・・・・・・・・・・・・・・・・・・・・・・ 7 5.2 Wiring method ・・・・・・・・・・・・・・・・・・・・・・・・・ 7 5.3 Model RE relay unit ・・・・・・・・・・・・・・・・・・・・・・・・・ 8 6. MAINTENANCE ・・・・・・・・・・・・・・・・・・・・・・・・・ 9 ...
- Page 7 １． ＰＵＲＰＯＳＥ ＯＦ ＵＳＥ The FM series level switches are manufactured specifically for clean liquid level detection, such as oils, water and chemicals. They are designed for horizontal mounting in a tank or vessel through flanged or threaded connections. They work well as high or low level alarm or control applications. For interface detection, please consult another instruction manual, model FM‑16. ２． ＰＲＩＮＣＩＰＬＥ ＯＦ ＯＰＥＲＡＴＩＯＮ The FM series level switches contain hermetically‑sealed reed switch within the stem or flange and a magnet in the end of the shaft. As the float rises or falls with the level of the liquid, the reed switch is activated by the magnet in the end of the shaft. Fig. 1 shows the high level operation (close ON rising level). (There is no liquid present.) (A switch closes as the liquid rises.) ...
- Page 9 3.3 Dimensions and internal circuit Table 3 Model: FM‑11 Model: FM‑12 Model: FM‑13 Model: FM‑14 Note: All dimensions above are in millimeters. 3.4 Switch actuation level Table 4 Model Distance from centerline of sensor Close ON rising level Close ON falling level FM‑11 ON : ‑3 mm ± 3 mm ON : +3 mm ± 3 mm FM‑13 OFF : ‑12 mm ± 3 mm OFF : +12 mm ± 3 mm FM‑14 DIFF. : 9 mm ± 6 mm DIFF. : 9 mm ± 6 mm FM‑12 Connect A and B Connect B and C ON : within ‑15 mm to +10 mm ON : within ‑10 mm to +15 mm OFF : within ‑15 mm to +10 mm OFF ...
- Page 10 ４． ＩＮＳＴＡＬＬＡＴＩＯＮ 4.1 Unpacking In case of unpacking, exercise caution and do not subject the unit to mechanical shock. After unpacking, visually check the unit's exterior for damage. 4.2 Installation Location The FM should be installed in an area where meets the following conditions: (1) The ambient temperature range is ‑10 ℃ to +60 ℃ CAUTION Install a sun shield over the housing if exposed to direct sunlight. Provide appropriate means to guard against moisture if temperature is low. Otherwise, the unit may be damaged. (2) There is a free flow of liquid both to and away from the float. CAUTION Keep the float out of the direct flow. Failure to do this may cause bending of the shaft. (3) The FM should be located away from strong magnetic fields such as those produced by motors or solenoid valves. (4) Humidity and vibration are low. (5) Ample space is provided for maintenance and inspection. 4.3 Installation method The FM is installed horizontally from the exterior of tank at the level where ...
- Page 11 Table 5 Model FM‑11 FM‑12 FM‑13 FM‑14 d = 41 mm d = 44 mm A = 60 mm + α d = 41 mm A = 60 mm α is length of extension rod. D = 120mm D = 130mm D = 120mm D = 120 mm (2) For threaded mounting nozzle. The FM is provided with R 1 1/2 or another specified male thread. The maximum ...
- Page 12 (FM‑12/22) ・ Close ON rising level: Wire A and C. ・ Close ON falling level: Wire B and C. Fig. 2 ５．ＷＩＲＩＮＧ 5.1 Technical notes of wiring (1) Contacts should be wired to relays or similar devices. Because reed switches are not designed for the direct starting of pumps, valves and alarms. They are susceptible to damage from electric surges. DO NOT EXCEED CONTACT RATINGS. We recommend the use of our relay unit model RE7000, consult another instruction manual. (2) The FM is designed for non‑hazardous application. In case of hazardous application, consult the NOHKEN technical department. (3) Use a time‑delay relay to dampen the switch operation, if there is surface wave motion. 5.2 Wiring method Proceed as follows: (1) Prepare a 2‑conductor vinyl‑insulated vinyl‑sheathed cable. The cable finished outside diameter should be 12 mm or less or conductors should be between 0.3 to 1.25 mm (22 to 18AWG or equivalent). (2) Remove approximately 50 mm of cable sheath from the end of the cable and approximately 10 mm of conductor sheath. (3) Check the position of cable inlet to allow for correct switch operation. (4) Remove the housing cover (loosen the 2 screws). (5) Bring the cable into housing. (6) Connect cables to the terminals. NOTE: In case of FM‑12 or FM‑22, connect A and C for high level operation (close ...
- Page 13 (7) The size of the cable inlet is G3/4. There are two ways for connecting the sensor cable. One is fixing the cable with a cable gland. The other is connecting a conduit to the housing. In either case, an adequate sealing should be provided to prevent water or dust ingress into the housing through the sensor cable. Secure the cable using sealing material for the conduit connection, or a proper tool when the gland is used, to protect the housing inside from dust or water. When water or moisture comes into the housing from the conduit, use putty to fill the inside of the conduit. (8) Double‑check wiring connections. (9) Replace and tighten the housing cover. 5.3 Model RE relay unit We recommend the use of our relay unit model RE. It is single level (alarm) and / or dual level (empty/fill control) relay. The latching (holding relay) feature allows pumps, valves and other devices to be turned on at one level and off at another. It also contribute to safety since it allows lower voltage and smaller currents to be used with sensor. ...
- Page 14 Ｎ Ｏ Ｔ Ｅ the following points: (1) Do not connect the plural relay unit to identical switch. Otherwise, the relay unit may be malfunction. Fig. 4 (2) Power supply must be connected in phase. Fig. 5 (3) To avoid malfunction, the wiring distance should be used within specifications. If the wring distance exceed specifications, the relay unit may be malfunction by stray capacitance between cables or noise. ...
- Page 15 ７． ＴＲＯＵＢＬＥＳＨＯＯＴＩＮＧ CAUTION Use the following chart to troubleshoot the malfunctioning sensor. If your remedies are unsuccessful, ask Nohken for repair and replacement. Table 6 Problems Possible causes Remedies Float does not rises Sediment or other foreign Clean float and shaft. or falls with the matters on float and shaft. liquid level Specific gravity of liquid Change the proper level too light (less than 0.7). switch. Viscosity of liquid too high Clean the unit at periodic (exceed 0.8 Pa・ s). intervals. Float is filled with liquid Replace float. or is collapsed. Float is collapsed by Replace float and keep 2.5MPa overpressure. Max. pressure Float is contact with ...
- Page 16 HEAD OFFICE : 15‑29,Hiroshiba‑cho,Suita‑city,Osaka 564‑0052,Japan. TEL:06‑6386‑8141 FAX:06‑6386‑8140 TOKYO BRANCH OFFICE : 67,Kandasakumagashi,Chiyoda‑ku,Tokyo 101‑0026,Japan. TEL:03‑5835‑3311 FAX:03‑5835‑3316 NAGOYA OFFICE : 3‑10‑17,Uchiyama,Chikusa‑ku,Nagoya‑city,Aichi 464‑0075,Japan. TEL:052‑731‑5751 FAX:052‑731‑5780 KYUSHU OFFICE : 14‑1,2‑chome,Asano,Kokurakita‑ku,Kitakyushu‑city,Fukuoka 802‑0001,Japan. TEL:093‑521‑9830 FAX:093‑521‑9834 ...
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