DI MPU01 Manuel utilisateur
825B122A
DI MPU01 Transit time ultrasonic lowmeter
Features
• Pipe dimension range: DN20 ÷ DN4000
• Transmitter protection class: IP66
•Transducer protection class: IP68
• Display: backlighted 2x20 alphanumeric digit
• Keypad: 4 keys
• Housing material: printing aluminium
• Displayed data: instantaneous owrate;
ow totalizer
• Mounting: wall
• Analog Output: Sel. 4÷20mA or 0÷20mA
• Accuracy: ±1%
• Repeatability: ±0,2%
• Linearity: ±0,5%
• Basic measurement period: 500ms
• Serial port: RS485
• Communication protocol: MODBUS RTU
or ASCII+ (opt.)
•Programmable frequency output: 0÷5000Hz
•Relay output: n.1 for pulse totalizer or alarm
• Medium speed range: ±12m/s
• Unit working temperature: -20÷60°C
• Instrumenthumidity: noncondensing85%RH(40°C)
• Sensors working temperature:
TS-2/TM-1/TL-1 -30 ÷ +90°C
TS-2 HT/TM-1HT -30 ÷ +160°C
TC1/TLC-2 -40 ÷ +160°C
• Sensor cable std. length: 5m
• Power s.: 230Vac or 10÷30Vdc (depending on model)
• Dimensions: 200x120x77mm
•Weight without sensors: 1Kg
Pag. 2 of 52
- Working principle
Where:
= sonic section angle
M = sonic section length
D = pipe internal diameter
T1 = sound transit time from the upstream transducer to the transducer downstream
T2 = sound transit time from the downstream transducer to the transducer upstream
∆T = Tup-Tdown
1. WORKING PRINCIPLE
The meter is designed to measure the uid velocity inside a pipe.
The clamp-on transducers models allow an easy installation.
The transit time ow meter uses two ultrasonic transducers that function as transmitters and receivers.
They are installed externally to the pipe at a specic distance from each other. They can be installed at Vmode (2
sonic section), at W mode (4 sonic section) or at Z mode (1 sonic section). The installation method choice depends
on the pipe and the uid characteristics. The instrument measures the transit time via the two transducers that
alternatively transmit and receive a sound pulses sequence. The difference in the measured transit time is directly
related to the uid velocity in the pipe, as shown in gure 1
Compact system for conductive and
non-conductive fluids, even with the
suspendedmaterialpresence(<10g/l;<Ø1mm)
Measuringrangesfrom<0,2m3/hto>30000m3/h
Applicable to various pipes mate-
rials (eg. SS316, copper, plastic,
etc.), with or without an inner lining
Power supply 85 ÷ 265Vac or 10÷30Vdc
The instrument is composed by a digital converter and two clamp-on or insertion type ultrasonic transducers.
The instrument calculates the instantaneous ow rate value by measuring the ight time difference of the ultrasonic
pulses.
Fig. 1
Pag. 3 of 52
- Features
2. FEATURES
Pipe
Material Carbon Steel; Stainless Steel; Cast Iron; Ductile Iron; Copper; PVC; Aluminium;
Asbestos; FiberGlass-Epoxy; Other
Pipe Ø range 20÷4000mm
Inner lining None, No Liner; Tar Epoxy; Rubber; Mortar; Polypropylene; Polystyrol; Polysty-
rene; Polyester; Polyethylene; Ebonite; Teon; Other
Pipe length Upstream pipe straight section of 10÷40D. Downstream pipe straight section
greater than 5D.
NB - The pipe straight section, downstream of a pump, must be greater than 20D.
Measured
uids
Kind Water (General); Sea Water; Kerosene; Gasoline; Fuel Oil; Crude Oil; Propane
(-45°C); Butane (0°C); Other Fluid; Diesel Oil; Castor Oil; Peanut Oil: Gasoline
#90; Gasoline #93; Alcohol; Water (125°C)
Suspended solids Homogeneous uids, even with material in suspension with a concentration less
than 20g/l and particle size less than 1mm.
NB - Avoid the ice formation inside the pipe at low temperatures
Temperature Depending on the used ultrasonic transducer model (see pages 4 and 5)
Flow velocity ±0,01m/s ÷ ±12m/s
Direction Direct and reverse ow rate measurement and separate totalization
Data
Converter
Unit
Accuracy ±1%
Working
conditions Temperature: -20°÷+85°C; humidity: 85% non-condensing (for applications in
conditions different from the standard, specify when ordering)
Analog output Opto-isolated with congurable mode: 4÷20mA; 0÷20mA; 0÷20mA Via RS232; 4÷20mA
vs Sound; 20÷4÷20mA; 0÷4÷20mA; 20÷0÷20mA; 4÷20mA vs vel.
Max. load: 1000ohm
OCT output
Passive opto-isolated: Vmax: 30Vdc; Imax 100mA
Alarm output or pulse output from ow totalizer with settable pulse width in
6÷1000ms range
Relay output N.1; Max. 125Vac 1A; 30Vdc 2A
Alarm output or pulse output from ow totalizer
Serial port RS485. Comunication protocol: MODBUS RTU; MODBUS ASCII
keyboard 4 keys
Display backlighted 2x20 alphanumeric digit LCD
Display data Simultaneous display of:: instantaneous ow rate (-99999.99÷+99999.99m3/h); ow to-
talizers (-19999999.99÷+19999999.99m3); total operating time displayable via
keyboard command
Data storage Flow Totalizer, total operating time and all system conguration parameters. Stor-
age on E2PROM
Power supply
(dependingonmodel) 230Vac ±15% 50÷60Hz; consumption: 3VA.
10÷30Vdc; consumption: 2W
Protection IP66; the transparent protective cover use is recommended (p.n. 546A103N)
Tab. 1
Pag. 4 of 52
- Transducers
3. TRANSDUCERS
Transducer Type Caratteristiche
TS-2
Dimensions
Pipe Ø range 20÷100mm (¾” ÷ 4”)
Temperature -30 ÷ +90°C
Menu 23 >19. Clamp-On TS-2
TS-2-HT
Dimensions
Pipe Ø range 20÷100mm (¾” ÷ 4”)
Temperature -30 ÷ +160°C
Menu 23 >19. Clamp-On TS-2
TM-1
Dimensions
Pipe Ø range 50÷700mm (2” ÷ 40”)
Temperature -30 ÷ +90°C
Menu 23 >16. Clamp-On TM-1
TM-1-HT
Dimensions
Pipe Ø range 50÷700mm (2” ÷ 40”)
Temperature -30 ÷ +160°C
Menu 23 >16. Clamp-On TM-1
Tab. 2
Pag. 5 of 52
- Transducers
Transducer Type Caratteristiche
TL-1
Dimensions
Pipe Ø range 300÷4000mm (3” ÷ 160”)
Temperature -30 ÷ +900°C
Menu 23 >20. Clamp-On TL-1
TC-1
(standard)
Dimensions
Pipe Ø range 80÷4000mm (3” ÷ 160”)
Temperature -40 ÷ +400°C
Max pressure 1.6Mpa (16bar)
Menu 23 >17. Insertion TC-1
TLC-2
(for
non-metallic
pipes)
Dimensions
Pipe Ø range 80÷4000mm (3” ÷ 160”)
Temperature -40 ÷ +400°C
Max pressure 1.6Mpa (16bar)
Menu 23 >21. Insertion TLC-2 Tab. 3
Pag. 6 of 52
- Dimensions/Electrical connections
5. ELECTRICAL CONNECTIONS
5.1 Connections
1) Separate the engine control cables or power cables from the DIMPU connection cables.
2) Remove the caps from the cable glands and open the cover by unscrewing the screws.
3) Lead the cables into the transmitter through the cable glands
4) Close the cap and tighten the cable glands
The immunity to electromagnetic interference is in accordance with directives
Fig. 2
Fig. 3
Pag. 7 of 52
- Electrical connections
5.3 POWER CONNECTION
5.3.1 Supply voltages in AC
5.2 Recommendations for external mounting
- or electrical connections, use a cable with a 6÷10mm outer diameter and fully tighten the M18 cable gland
- Securely close the cover
- position the cable so that it forms a downward curve at the M18 output (Fig.4); in this way the condensation and/or
rain water will tend to drop from the curve bottom
- place the transparent cover for protection
Fig. 5
Pag. 8 of 52
5.4 TRANSDUCER CONNECTION
- Electrical connections
5.3.2 Supply voltage in 10÷30Vdc
Fig. 6
Fig. 7
Pag. 9 of 52
- Electrical connections
5.5 OUTPUT SIGNALS CONNECTION
5.5.1 Analog output
5.5.2 Pulse output
Fig. 8
Fig. 9
Pag. 10 of 52
- Electrical connections
5.5.3 Relay output
5.5.3 MODBUS port
Fig. 10
Fig. 11
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