Summary of Contents for Nohken VQ32
- Page 1 ＴＳ０２－１０００９５ ＩＮＳＴＲＵＣＴＩＯＮ ＭＡＮＵＡＬ TUNING FORK LEVEL SENSOR MODEL: VQ32 Issued 2023-02-01...
- Page 2 Bef ore handling the equipment, read this manual caref ully. ・ Instructions in documents submitted by Nohken or its repr esentative have higher pr iorit y than t hose in this manual.
- Page 3 Do not alter or disassemble the equipment, unless you have been instructed to do so by Nohken or its repr esentative. Failur e to obser ve this may result in: - malf unction of or damage to the equipm ent or connected devices;...
- Page 4 CAUTION Handle the equipment with care. Do not drop, throw, or give a strong shock to avoid damage. Observe operat ion conditions specif ied in the manual. Use outside the specif ied conditions may result in malf unction of or damage to the equipment or connected devices, ignition, user injur y, or electric shock.
- Page 5 (1) year from the date of original shipment from Nohken’s factory. B) Nohken will not assume liability for loss nor damage resulting from the use of the equipment. C) Nohken will not assume liability for damage resulting from: C-a) not observing instructions in this manual;...
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Page 6: Table Of Contents
Table of Contents 1. PURPOSE OF USE ..............1 2. DESCRIPTION ............... 1 2.1 Product Overview ............... 1 2.2 Principle of Operation ............1 3. SPECIFICATIONS ..............1 3.1 Model Numbering ..............1 3.2 Specifications ..............2 3.2.1 Common ..............2 3.2.2 Model specific ............. -
Page 7: Purpose Of Use
The frequency changes with the medium around the fork. The sensor electronics detects this change in frequency, and gives an output to report presence or absence of the material. 3. SPECIFICATIONS 3.1 Model Numbering VQ32-□ □ □ □ Code Surface finish (blank) -
Page 8: Specifications
3.2 Specifications 3.2.1 Common Model VQ32-R□0 VQ32-R□X VQ32-F□0 VQ32-F□X VQ32-S□0B VQ32-S□XB Measured material Liquids Operating characteristics Specific gravity 0.6 to 2.0 (sensitivity Lo ≧0.8, Hi ＜0.8) Viscosity 0.2 mPa・s to 10 Pa・s Switching point Approx. 13.5 mm from tip (vertical) (water, sensitivity=Lo) Approx. -
Page 9: Model Specific
3.2.2 Model specific (1) 2 wire (VQ32-□0□) Operating characteristics LED (red) operation Output ON - Lights continuously Output OFF - 1 flash per 3 seconds Delay - 7 flashes per second Overload - 3 flashes per second twice, and then goes out for 1 second... - Page 10 (3) Relay (VQ32-□2□) Operating characteristics LED (red) operation Relay energized - Lights continuously Relay de-energized - 1 flash per 3 seconds Delay - 7 flashes per second Error - 3 flashes per second 5 times, and then goes out for 1 second...
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Page 11: Outline Drawing
3.3 Outline Drawing Threaded Flanged Sanitary Standard Extended Cover (top view) ① Cover – clear cover to check status LED with the cover closed. ② Cable inlet (G1/2, 11mm deep) ③ External earth terminal (M4) ④ Housing – has the electronics inside ⑤... -
Page 12: Handling Notes
4. HANDLING NOTES Observe instructions below when handling the sensor, or malfunctioning or injury may result. (1) Lay the sensor on a flat surface. Do not stand it to prevent it from falling. Support the sensor with wood piece to avoid rolling, or bent or damaged fork. -
Page 13: Installation
5. INSTALLATION WARNING VQ32 is not intended for use in hazardous areas . Never use it in areas where flammable or explosive gases or vapors may be present. 5.1 Unpacking (1) Carefully unpack the sensor. Do not hold it by its fork to avoid damage. -
Page 14: Switching Point
5.2 Switching Point (1) Vertically mounted, with water - approximately 13.5mm from the fork tip (2) Horizontally mounted, with water – approximately 3mm above the center Fig. 5-1 5.3 Mounting Align the fork gap with the flow direction. Use the markings when orienting the sensor. (1) Threaded version Use a tool to mount the sensor. -
Page 15: Handling Notes
5.4 Handling Notes CAUTION Never alter the forks in any way to avoid malfunctioning or damage. Do not drop or damage the sensor. Handle with care. Make sure the fork protrudes into the tank or piping. Otherwise the sensor may erroneously detect buildup on the wall. - Page 16 (1) For horizontal mounting, orient the sensor as the picture on the left in Fig. 5-4 show. Make sure the markings on the hexagon face upwards and downwards. Fig. 5-5 CAUTION When measuring sticky material, the surfaces of the fork must be vertical to reduce buildup on the fork.
- Page 17 (4) Typical installation Fig. 5-8 CAUTION Allow clearance of at least 13mm between the fork tip and the tank/pipe wall for reliable operation. (5) In sticky material, response to wet-to-dry may be slower. Response to dry-to-wet is not affected. (6) Make sure the fork protrudes for at least 27mm in any cases including small piping, and the fork tip is at least 13mm away from the piping wall.
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Page 18: Wiring
- 2 wire (VQ32-□0□): 500mA AC/DC - 3 wire (VQ32-□1□): 100mA DC - Relay (VQ32-□2□): 250V, 3A AC (resistive), 30V, 3A DC (resistive) Run the sensor cabling as far from power lines as possible to avoid induction. Use a metal conduit if necessary. -
Page 19: Cable
When connecting to a relay, the sensor may instantly change output states after power-up or recovery from power interruption. Beware that latching relays will operate in these occasions. Do not directly connect to a PLC or a timer relay. Use the relay (VQ32- □2□) or 3 wire (VQ32-□1□) version instead. Fig.6-1... - Page 20 [Bleeder resistor] If the following applies to the connected relay, connect a bleeder resistor in parallel. - rated for 12mA or less - reset current is 5mA or smaller *1 Reset current = rated current of relay [mA] x release voltage [%] x 0.01 A.
- Page 21 (2) 3 wire version (VQ32-□1□) CAUTION Always connect a load between OUTPUT 1 and 24V DC+, and between OUTPUT 2 and 24V DC-, or over current will damage the sensor. When connecting to a relay, use one with a protection circuit or add a surge protection device to protect the sensor from reverse voltage.
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Page 22: Cable Inlet
(3) Relay version (VQ32-□2□) CAUTION When connecting to a relay, use one with a protective circuit or add a surge protection device to protect the sensor from reverse voltage. Fig.6-3 6.3 Cable Inlet Cable inlet is of G 1/2 (11 mm deep). -
Page 23: Placing Cover
6.4 Placing Cover Remove dust or debris from inside the housing, and then place the cover. Hold the sensor by the housing, and rotate the cover. Keep rotating after you feel resistance until the markings on the cover and the housing are in line. The markings not in line means the cover is not properly tightened, and water or dust may enter to cause corrosion or short-circuit. -
Page 24: Adjustment
⑥ Delay trimmer (DELAY TIME) – fine tunes delay time ⑦ Status LED (OP) - 2 wire (VQ32-□0□) Lights continuously when the output is ON and flashes when the output is OFF. - 3 wire (VQ32-□1□) Lights continuously when the control output is ON, and flashes when the control output is OFF. -
Page 25: Modes Setting
7.3 Modes Setting CAUTION 2 wire version (VQ32-□0□) may instantly change its output states at power-up. Make sure this does not adversely affect connected devices. (1) Operation mode Fail-safe switch (FS) determines the operation mode. The sensor offers two modes, “H” and “L”. - Page 26 (2) Delay timer Delay timer prevents contact bounce by delaying switching for a preset duration of time. Delay switch (DELAY) selects the ON or OFF delay timer, and the trimmer sets the duration. Table 7-2: Delay timer Delay switch ON delay time OFF delay time 0.5 to 30 sec.
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Page 27: Maintenance And Inspection
(3) Sensitivity Sensitivity is factory set to “Lo”. If the specific gravity of measured material is smaller than 0.8, set the Sensitivity switch to “Hi”. Allowable specific gravity range: 0.6 to 2.0 Table 7-4 8. MAINTENANCE AND INSPECTION Perform maintenance and inspection once or twice a year. More frequent maintenance will be required depending on the measured material, temperature or other conditions. -
Page 28: Maintaining Dismounted Sensor
8.2 Maintaining Dismounted Sensor (1) See 4. HANDLING NOTES before dismounting the sensor. Ensure ample space for maintenance. (2) Remove the cover and then cabling. (3) Dismount the sensor from the tank, and place it on a flat surface. (4) Check the fork for damage such as corrosion and deformation. (5) Remove buildup on the fork. -
Page 29: Troubleshooting
LED flashes 3 times per 6.2 (pp.13-16) No load connected. Wire correctly. second twice and then goes (2 wire, VQ32-□0□) out for 1 second. LED flashes 3 times per Damaged sensor Replacement required. Contact second for 5 times and then our sales office. -
Page 30: Glossary
11.GLOSSARY Terms used in this manual are explained below. Those that have already been defined earlier in this manual are not included. Element that creates strain. Incorporated in the fork to oscillate Piezo-electric crystal Detection element. Keeps oscillating during operation, and the Fork change in oscillation frequency indicates material presence or absence. - Page 31 OSAKA HEAD OFFICE : 15-32 Hiroshiba-cho, Suita, Osaka 564-0052, Japan TEL: 81-6-6386-8141 FAX: 81-6-6386-8140 TOKYO HEAD OFFICE : 67 Kandasakumagashi, Chiyoda-ku, Tokyo 101-0026, Japan TEL: 81-3-5835-3311 FAX: 81-3-5835-3316 NAGOYA SALES OFFICE: 3-10-17 Uchiyama, Chikusa-ku, Nagoya, Aichi 464-0075, Japan TEL: 81-52-731-5751 FAX: 81-52-731-5780 KYUSHU SALES OFFICE: 2-14-1 Asano, Kokurakita-ku, Kitakyushu, Fukuoka 802-0001, Japan TEL: 81-93-521-9830...