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FDT-25 Handheld Ultrasonic Flowmeter

13

TOP VIEW OF PIPE

Upstream transducer

Sensors Spacing

Downstream transducer

§2.8.3 Z-method Installation

Z-method is commonly used when the pipe diameter is between 300 millimeters and 500 millimeters.

TOP VIEW OF PIPE

Upstream transducer

SensorsSpacing

Flow

Downstream transducer

§2.8.4 W-method Installation

W-method is usually used on plastic pipes with a diameter from 10 millimeters to 100 millimeters

TOP VIEW OF PIPE

Upstream transducer

Sensors Spacing

Downstream transducer

Flow

Flow

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Summary of Contents for FDT-25

Page 1: ...TM User sGuide Shop online at e mail info omega com For latest product manuals omega com en us pdf manuals omega com omega com en us pdf manuals FDT 25 Ultrasonic Flowmeter...

Page 2: ...r Service 1 800 622 2378 USA Canada only Engineering Service 1 800 872 9436 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com omega com info omega com The information contained i...

Page 3: ...ation 11 2 8TransducersInstallation 12 2 8 1TransducersSpacing 12 2 8 2V methodInstallation 12 2 8 3Z method Installation 13 2 8 4 W method Installation 13 2 8 5N methodInstallation 14 2 9Installation...

Page 4: ...the OCT output 19 3 20 How to modify the built in calendar 19 3 21 How to adjust the LCD contrast 20 3 22 How to use the RS232 serial interface 20 3 23 How to view the Date Totalizers 20 3 24 How to...

Page 5: ...ith power frequency transverter working nearby Other outstanding features the signal receiving circuits feature self adapting performance so as to ensure that the user can easily operate the instrumen...

Page 6: ...nsverses the pipe twice or W method where the sound transverses the pipe four times or in Z method where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once T...

Page 7: ...er Top vierw stream transduer socket stream transduer socket Front view LCD DISPLAY LED Charging Indicator Keypad Bottom view Pins for battery recharge RS 232C communication interface Transducers STD...

Page 8: ...r Cable 5m x2 Red Terminal 5m Red Terminal Blue Terminal Blue Terminal Extended Cable 5m x2 Optional Accessaries Red Terminal 5m Blue Terminal Red Terminal Blue Terminal Converted Terminal and AC DC A...

Page 9: ...ion is provided to avoid inadvertent configuration changes or totalizer resets A time keeper is integrated in the flow meter for the index of date totalizing and works as the time base of flow accumul...

Page 10: ...gurable Totalizer 7 digit totals for net positive and negative flow respectively Liquid Types Virtually all liquids Security Setup values Modification Lockout Access code needs unlocking Display 4x8 C...

Page 11: ...is nearly consumed the battery voltage drops to below 3V The user can obtain an approximate battery working time from the battery voltage A software battery working time estimator is integrated in th...

Page 12: ...rks as key when entering numbers Key is the going DOWN key when the user wants to go down sided menu window It also works as the key when entering numbers Key is backspace key when the user wants go l...

Page 13: ...less steel which has a number 1 antecedent to stainless steel on the display the user should first press the ENT key to enter into a selection modification mode then either make the selection by press...

Page 14: ...ipe materialsand standardliquids the followingdetailedstep by stepsetupis recommended 1 Press keys and then press 2 Press key press ENT key 1 1 to enter M11 window to input the digits for the pipe out...

Page 15: ...s under M00 to M09 press the ENT key and the user will go to M90 press ENT key to return Press the dot key to go to M11 When the window display is under M25 press ENT key to go to M01 2 7 Transducers...

Page 16: ...The measurement is realized by measuring the traveling time difference of the ultrasonic signals Since the difference is very small the spacing and the alignment of the transducers are critical facto...

Page 17: ...used when the pipe diameter is between 300 millimeters and 500 millimeters TOP VIEW OF PIPE Upstream transducer SensorsSpacing Flow Downstream transducer 2 8 4 W method Installation W method is usuall...

Page 18: ...r surface of the pipe and apply more coupler to increase the signal strength 3 Adjust the transducers both vertically and horizontally while checking the varying signal strength stop at the highest po...

Page 19: ...stallation If the pipe parameters are entered correctly and the transducers are installed properly the value for this ratio should be in the range of 1003 If this range is exceeded the user should che...

Page 20: ...RED transducers 3 3 How to change between units systems Use menu window M30 for the selection of unit system in English or Metric system 3 4 How to select a required flow rate unit Use menu window M3...

Page 21: ...not affect the flow measurement when the actual flow is absolutely greater than the low cutoff value 3 11 How to setup a zero point There exists a Zero Point with certain installation which means the...

Page 22: ...lly four parameters should be configured for the setups Enter the lower flow rate value in window M68 and the higher flow rate value in window M69 Enter the frequency range in window M67 For example a...

Page 23: ...can be user configurable through M73 M74 M75 M76 For example assume that the Buzzer should start beeping when the flow rate is less than 300 m3 h and greater than 2000m3 h the following steps for set...

Page 24: ...ion For example use it as a timer to show how long a fully charged battery will last Under M72 press ENT key and then select YES to reset the timer 3 25 How to use the manual totalizer Use M28 for the...

Page 25: ...the allowed range of the value M12 Window for entering pipe wall thickness M13 Window for entering the inner diameter of the pipe M14 Window for selecting pipe material Standard pipe materials that t...

Page 26: ...alue when poor signal condition occurs YES is the default setup M29 Enter a value ranging from 000 to 999 0 is the default value M30 Window for selecting unit system Default value is Metric The change...

Page 27: ...n made M46 Network environment Identification Number Any integer can be entered except 13 0DH carriage return 10 0AH line feeding 42 2AH 38 65535 Every set of the instrument in a network environment s...

Page 28: ...lue is entered M72 Working timer It can be cleared by pressing ENT key and then select YES M73 Enter Lower Flow Rate value that will trigger the 1 Alarm There are two virtual alarms in the system By v...

Page 29: ...gram M95 Not used M96 Not used M97 Command to record the pipe parameters entered by the user either to the built in data logger or to RS 232C serial interface M98 Command to record the diagnostic info...

Page 30: ...unter measures should be taken Error message causes Counter measures ROM Testing Error Segment Test Error Problemwith the software 1 Power on again 2 Contact with factory Stored Data Error The paramet...

Page 31: ...signal detected 2 Transducers installed improperly 3 Too much fouling 4 The pipe liners are too thick 5 Problemwith transducers cords 1 Relocate measuring place 2 Clean the spot 3 Check the cords 4 Ch...

Page 32: ...b Problem with transducer installation c Thereis a Zero Point Tryto zero theinstrument byusingM42 and make sure that the flow inside the pipe should be standstill 3 The battery can not work as long a...

Page 33: ...format ending with a carriage CR and line feed LF Commonly used commands are listed in the following table Command Function Data Format DQD CR Return flow rate per day d ddddddE dd CR LF DQH CR Retur...

Page 34: ...is a single byte value ranging 00 255 P Prefix before any command Command connector to make a longer command by combining up to 6 commands Notes CR stands for Carriage Return and LF for Line Feed d st...

Page 35: ...mming much easier For example assume that the measurement of an instrument with IDN 4321 are going to be returned and then all the following 3 values 1 flow rate 2 velocity 3 POS totalizer will be ret...

Page 36: ...y OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limite...

Page 37: ...s M U Turbine Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U...

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