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dynasonics TFXL, Инструкция по установке и эксплуатации

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28 

 

 

• 

Vol. Correction Sig. Str. Limit 

is a feature used to provide 

volumetric compensation for gas bubbles that can be 
present in liquid systems.  The TFXL measures the velocity 
of the liquid in the pipe and converts that velocity to volume 
by multiplying the velocity by the cross-sectional area of the 
pipe.  If there are gas bubbles within the liquid, the gas is 
displacing some of the liquid and errors can occur.  When 
Vol. Correction Sig. Str. Limit is set to zero, the 
compensation function is not operational.  To use the 
feature, enter the maximum Signal Strength observed on 
the flow meter after installation.  The maximum signal 
strength should occur with the pipe completely full of liquid 
and the flow stopped.  Signal Strength can be observed on 
the UltraLink Data Screen.  See 

Figure 12

. 

• 

Entry of data in the 

Basic

 and 

Flow 

tabs are all that is 

required to provide flow measurement functions to the flow 
meter.  If the user is not going to utilize input/output 
functions, click on the 

Download

 button to transfer the 

configuration to the TFXL instrument. 

7. ADVANCED

 TAB—See 

Figure 15 

The Advanced TAB contains several filter settings for the TFXL 
flow meter.  These filters can be adjusted to match response 
times and data “smoothing” performance to a particular 
application.  The factory settings are suitable for most 
installations. 

• 

Time Domain Filter 

adjusts the number of raw data sets 

(the wave forms viewed on the UltraLink Diagnostics 
Screen) that are averaged together.  Increasing this value 
will provide greater damping of the data and slow the 
response time of the flow meter.  This filter is not 
adaptive—it is operational to the value set at all times. 

• 

Low Signal Cutoff 

is a duplicate entry from Page 27.  

Adjusting this value adjusts the value on the Flow TAB. 

• 

Substitute Flow 

is a duplicate entry from Page 27.  

Adjusting this value adjusts the value on the Flow TAB. 

• 

Short Pulse Duration 

is a function used on pipes larger 

than 8 inches [200 mm].  Set this value to zero to disable 
the function.  Do not select the 

Auto Short Pulse 

box. 

Содержание TFXL

Страница 1: ...1 MODEL TFXL ULTRASONIC FLOW METER Installation and Operating Instructions...

Страница 2: ...2...

Страница 3: ...anations 7 Components and Terminology 8 Flow Meter Mounting Procedure 11 Electronic Connections 14 4 20mA Output Connections 16 Pulse Output Connections 18 Applying Power 20 Software Utility 22 Mainte...

Страница 4: ...mounting location with at least 10 pipe diameters upstream and 5 diameters downstream from the meter with no flow disturbances i e elbows tees needle valves etc See Figure 1 B On horizontal pipe choo...

Страница 5: ...screws DO NOT OVER TIGHTEN and DO NOT ROTATE the flow meter on the pipe once the screws have been tightened E Connect 11 30 Vdc to the power terminals within the TFXL transmitter Ensure that the power...

Страница 6: ...ents The TFXL compensates for gas content in the liquid and will remove gaseous content from flow rate and totalizer readings Outputs from the flow meter include 4 20 mA analog turbine frequency outpu...

Страница 7: ...bient Temperature General Purpose 0 to 185 F 20 to 85 C Hazardous Area 0 to 105 F 20 to 40 C Altitude Up to 2000 meters Humidity 20 to 31 C 80 max decreasing linearly to 50 at 40 C Transient Overvolta...

Страница 8: ...OW METER COMPONENTS AND TERMINOLOGY The pictures on the following two pages reference key components and their respective terminology of the TFXL flow meter These terms are utilized throughout this ma...

Страница 9: ...9 SOUND GUIDES CLAMP PC INTERFACE CABLE...

Страница 10: ...l IMPORTANT NOTE Must be operated by a power supply suitable for the location IMPORTANT NOTE Do not connect or disconnect either power or outputs unless the area is known to be non hazardous IMPORTANT...

Страница 11: ...ion would be defined as a piping system that is completely full of liquid when measurements are being taken and has lengths of straight pipe such as those described in Figure 4 The optimum straight pi...

Страница 12: ...tion due to air pockets on the top of the pipe or sediment at the bottom of the pipe It is best to plumb and orient the piping system so that it will be completely full of liquid at all times whether...

Страница 13: ...re an acoustically conductive path between the transducer face and the prepared pipe surface a coupling compound is employed Enclosed with the TFXL flow meter is a tube of silicone based grease This g...

Страница 14: ...For non hazardous location installations flow meter power and output signals can be carried by a single cable with multiple conductors Select a 20 24 AWG shielded cable with an external jacket suitabl...

Страница 15: ...11 and 30 Vdc at a minimum of 0 25 Amps or 250 milliamps With the power from the DC power source disabled or disconnected connect the positive supply wire and ground to the appropriate field wiring te...

Страница 16: ...ically to the TFXL The 4 20 mA output is designed to source current across a loop resistance that is typically located within a data acquisition system or other receiving instrument The maximum resist...

Страница 17: ...block diagram of how the 4 20 mA interfaces with the receiving device Connect the wires to the appropriate Field Wiring Terminals within the TFXL enclosure See Figure 9 TFXL Flow Meter Receiving Devi...

Страница 18: ...rfacing directly with a turbine flow meter s magnetic pickup The output is a relatively low voltage AC signal that is not ground referenced The minimum AC amplitude is approximately 500 mV peak to pea...

Страница 19: ...eter input terminals on the receiving instrument and verifying that the K factor listed on the side of the TFXL enclosure is programmed into the receiving instrument This output is not referenced to D...

Страница 20: ...the frequency input negative or DC common connection in the receiving instrument See Figure 11 J APPLYING POWER TO THE TFXL The TFXL flow meter requires a full pipe of liquid before a successful star...

Страница 21: ...rease between the flow meter transducer and the pipe a broken connection between a transducer and the main circuit board check wire terminations under the display The display may indicate a flow rate...

Страница 22: ...Installation 1 Place the enclosed diskette or CD ROM into the diskette or PC CD ROM drive 2 If the CD drive is setup to automatically launch setup files when it is closed the installation Unwise Inst...

Страница 23: ...been run on the computer UltraLink will test Communications Port 1 for connection with the TFXL meter If Comm port 1 is already in use by another application UltraLink will prompt for another Comm po...

Страница 24: ...tions button on the top bar Click on Initialize Choose the appropriate COM port and RS232 Proper communications are established when a green OK is indicated in the lower right hand corner of the PC di...

Страница 25: ...nit and rate time base from the two lists Totalizer Units are selected from pull down lists Select an appropriate totalizer unit and totalizer exponent The totalizer exponents are in Scientific Notati...

Страница 26: ...26 Exponent Display Multiplier E 1 X 1 No multiplier E0 X 1 No multiplier E1 X10 E2 X100 E3 X1 000 E4 X10 000 E5 X100 000 E6 X1 000 000 TABLE 1 Totalizer Exponent Values Figure 14 Flow Tab...

Страница 27: ...provides an error indication Low Signal Strength Error 0010 on the TFXL display when liquid conditions in the pipe have changed to the point where flow measurements may not be possible warns if the p...

Страница 28: ...user is not going to utilize input output functions click on the Download button to transfer the configuration to the TFXL instrument 7 ADVANCED TAB See Figure 15 The Advanced TAB contains several fil...

Страница 29: ...w readings and outputs Flow Filter Hysteresis creates a window around the average flow measurement reading whereby if the flow varies within that window greater Flow Filter Damping will occur The filt...

Страница 30: ...esis windows before the flow meter will use that flow value Larger values are entered into the Bad Data Rejection when measuring liquids that contain gas bubbles as the gas bubbles tend to disturb the...

Страница 31: ...to 1000Hz Multiply the maximum flow rate times 1000Hz then divide by the re quired frequency at maximum flow 3 Enter this value in the Flow 1KHz field Example Maximum Flow Rate 400 GPM Desired K facto...

Страница 32: ...ow to display flow rate only on the display Select Total to display the flow accumulator only on the display Select Both to periodically toggle between rate and accumulated flow displays Display Total...

Страница 33: ...33 Figure 17 Display Tab Display Dwell Time Enter a value between 1 and 10 seconds to establish how long the flow meter will display flow rate then accumulated total then rate and so on...

Страница 34: ...tion To initialize the three step calibration routine press the Calibration button located on the top of the UltraLink Data Screen The display shown in Figure 18 will appear The first step in the cali...

Страница 35: ...valve Wait until the delta time interval shown in Figure 19 is stable and typically very close to zero Press the Set button Press the Next button when complete then press the Finish button on the Cal...

Страница 36: ...dow and press the Set button Repeat for as many points as desired Note If only two points are to be used zero and span it is preferred that a flow rate as high as anticipated in normal operation is us...

Страница 37: ...r flow meters or may be recalled should the same pipe be surveyed again or multiple meters programmed with the same information Printing Out a Flow Meter Configuration and Calibration Report Select Fi...

Страница 38: ...layed on the Screen The flow meter is not mounted onto the pipe using an acoustic couplant The acoustic couplant is not uniform between the flow meter transducer and the pipe The liquid contains more...

Страница 39: ...ed freight prepaid by the Company Any repaired products shall be warranted for the remainder of the unexpired Warranty Period plus the amount of time the product was under repair or for a period of 90...

Страница 40: ...r service department at 800 535 3569 or 262 639 6770 to obtain an RGA number for the authority and tracking of your material and its proper inspection and return All returns of equipment must go to th...

Страница 41: ...41...

Страница 42: ...42 NOTES...

Страница 43: ...43...

Страница 44: ...44 TFXL O M REV 11 05 8635 WASHINGTON AVENUE RACINE WI 53406 TOLL FREE IN NORTH AMERICA TEL 800 535 3569 FAX 800 732 8354 TEL 262 639 6770 FAX 262 639 2267 URL www dynasonics com...

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