Summary of Contents for TLV VFM-T2
- Page 1 172-65256M-00 (VFM-T2) 7 September 2001 ISO 9001/ ISO 14001 Manufacturer Kakogawa, Japan is approved by LRQA LTD. to ISO 9001/14001 Vortex Flowmeter Counter VFM-T2 Copyright © 2001 by TLV CO., LTD. All rights reserved...
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Page 2: Table Of Contents
Modifying the Pulse Width Output Signal (Optional) ..........14 Operation and Adjustment for Setting and Modifying the Analog Output Circuit (Optional)......................15 Operation ................ 17 Preparations Before Operation ..............17 Operation......................17 Troubleshooting .............. 17 Standard Specifications........... 18 Product Warranty ............19 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 3: Introduction
Please keep this manual in a safe place for future reference. Please read this manual in conjunction with the VFM Vortex Flowmeter Transmitter “Instruction Manual”. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 4: Safety Considerations
• The three types of cautionary items above are very important for safety: be sure to observe all of them as they relate to installation, use, maintenance and repair. Furthermore, TLV accepts no responsibility for any accidents or damage occurring as a result of failure to observe these precautions. -
Page 5: Handling Precautions
Ÿ A location in which it will not be exposed to rain or water. Ÿ A location in which it is subjected to minimal vibration or impacts. Ÿ A location in which it will experience only slight fluctuations in temperature ° and humidity (approximately 25 C and 65%). 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 6: General Description
NOTE: Though the acceptable operating temperature range is − 10 ° C to + 50 ° C, whenever possible select a location that is of typical room temperature. 3) Secure sufficient space to the rear of the counter for ease of wiring and maintenance. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 7: Installation Method
If inductive interference is suspected, use devices such as capacitors or surge suppressors where necessary. 3) Use spade terminals to ensure good electrical connections. The terminals for connections are located on the rear of the unit. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 8: Description Of The Field Wiring Terminal Block
MUST be connected using a Output wire link. If they are not linked, 3: + analog voltage does not reach 1 – 5V DC 3, 4 4: − terminals 3 and 4. Input Signal Connection Current Pulse 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 9: Configuration Block Diagram
* When the full scale frequency is in the range of 2 – 4Hz and the waveform ratio of the input pulse is 1:1: J1 CLOSE. • F/I Circuit: converts an input frequency of 4 – 20mA or 1 – 5V to an analog signal 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 10: Functions And Operation
0: 1/1, 1: 1/10, 2: 1/100 ⇒ Meter Factor* 0.0001 - 1.9999 ⇒ Number of Sampling Cycles* 1 - 128 NOTE: For items marked with an asterisk*, set points can be selected only within the ranges shown. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 11: Calculating Total And Instantaneous Flow Rates
Unless it is necessary to change the preset settings in the field, further adjustment should not be required. NOTE: It is necessary to remove the internal components (motherboard) of the unit when setting, modifying or adjusting jumpers, switches or volumes. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 12: Internal Construction
*3: A microprocessor input speed with a maximum of 200Hz is required. It may be necessary to set “hard” dividing prior to the processor input. Divide by one of the following: 1/1, 1/10 or 1/100. →→ See the next section. 172-65256M-00 (VFM-T2) 7 Sep 2001... - Page 13 (2) Scaled (display units): standard (B – C) Power Board (underside) Setting “Hard” Dividing: J4 (1) Dividing 1/1 (2) Dividing 1/10 (3) Dividing 1/100 Setting the Pulse Input Specifications Selection Jumper: J2 (1) 3 – C Power Board (topside) 172-65256M-00 (VFM-T2) 7 Sep 2001...
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Page 14: Functions To Establish Factors
5. Press the [RESET] button 9 times to change the second digit to “9”. The LCD display reads F0.0009 6. Push the [MODE] button one time to move the “09” one place to the left. The LCD display now reads F0.0090 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 15: Modifying The Pulse Width Output Signal (Optional)
5. Connect an instrument capable of measuring pulse width, such as an oscilloscope, between terminal blocks 4 and 5 (PULSE OUT). 6. The pulse width is adjusted by turning the P1 volume. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 16: Operation And Adjustment For Setting And Modifying The Analog Output Circuit (Optional)
The items in the following section can be set and modified by switching the jumper J1, SW1 and SW2 on the F/I board. The analog output signal is adjusted by controlling the P1 (SPAN) and P2 (ZERO) volume. P1 (SPAN) Volume P2 (ZERO) Volume F/I Board 172-65256M-00 (VFM-T2) 7 Sep 2001... - Page 17 Adjust the analog signal to the maximum value (20mA or 5V) P1 (SPAN) corresponding to the input frequency maximum value. Adjust the analog signal to the minimum value (4mA or 1V) P2 (ZERO) corresponding to the input frequency minimum value. 172-65256M-00 (VFM-T2) 7 Sep 2001...
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Page 18: Operation
IMPORTANT u If the problem is suspected to be other than one listed above, contact the TLV service network. When contacting TLV, be prepared to provide details such as the product name, model and symptoms of the problem. 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 19: Standard Specifications
10MΩ or greater at 500V DC Between power terminals and ground Withstand Voltage 1500V AC for 1 minute Power Consumption 7VA max. Weight Approximately 0.6 kg Case Molded resin and aluminum Frame Color Munsell N1.5 or equivalent 172-65256M-00 (VFM-T2) 7 Sep 2001... -
Page 20: Product Warranty
One year following product delivery. 2. Warranty Coverage TLV CO., LTD. warrants this product to the original purchaser to be free from defective materials and workmanship. Under this warranty, the product will be repaired or replaced at our option, without charge for parts or labor.
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