© KROHNE 12/2000 D 31 IF10 02 D GR/PRINTO Installation and operating instructions ALTOSONIC Ultrasonic Flowmeters UFM 800 16 6 5 4 7 10 18 12 13 3 8 9 14 15 14 15 8 2 17 11 Variable area flowmeters Vortex flowmeters Flow controllers Electromagnetic flowmeters Ultrasonic flowmeters Mass flowmeters Level measuring instruments Communications engineering Engineering systems & solutions
Contents Page 1 Description of the installation 3 1.1 Material delivered for Single Beam (SB) 3 1.2 Material delivered for Double Beam (DB) 3 2.0 Sensor distance calculation 4 3.0 Mounting of the sensor supports and the square pipe 5 4 Sensor alignment 5 4.1 Fluid alignment 6 4.2 Laser alignment 7 5.0 Welding of the sensors on the sensor support 7 6.0 Mounting of the sensors 8 7.0 Cabling, connection, final mounting 8 8.0 Programming the UFC 500 converter 9 9.
1.0 Description of the installation The supplied installation is basically the same as the UFM 400F (single beam SB) or the UFM 500F (double beam DB). The difference is that the sensors are welded in an existing steel pipe. Because wet calibration is impossible, the primary constant (GK) will be calculated from the geometry. If a reference value of the flow rate is available, the installation can be calibrated on site. 1.
2.0 Sensor distance calculation For calculating the sensor distance A it is necessary to know the internal diameter Di. For centering the sensor holders it is necessary to know the wall thickness t and the external diameter D.
3.0 Mounting of the sensor supports and the square pipe ● Mark the centers of places where the sensors must be fixed on the tubes (Drawing 1/2 SB/DB). ● Drill holes at these places of diameter 40 mm (Drawing 3) ● Machine the sensor supports so that they have the right curve for the pipe (outside diameter) and the right length (Drawing 3).
4.1 Fluid alignment For a correct alignment a Service Adapter Board is required as shown in the diagram. Note: The service adapter must be connected with a flatcable to the Service connector on the converter just behind the display board.
Procedure for the liquid alignment by using the service adapter board: 1. Align the four sensors physically 2. Connect the sensor cables (1,2, 3 and 4) to the converter as described in item 7 3. Install the service adapter board 4. Connect the power supply 5. Program the converter as described in item 8 (diameter, time window etc.) 6. Select in address 5.2.6. path 1 (i.e. sensors 1 and 2) 7. Measure the DC voltage on AGCL (red) and GROUND (black) 8.
6.0 Mounting of the sensors ● Mark the connection box of sensors 1 and 4 with a "P”, mark the connection box of sensors 2 and 4 with a "N” (See Drawing 2). ● Clean the inside of the sensor holder using acetone and dry with compressed air. ● Clean the piezo crystal. ● Glue the crystal to the cupper sheet at the front end of the piezo guiding, using the acoustic coupling grease. NOTE: With a "P” type sensor: the crystal side marked with a green dot must face the piezo guiding.
● Connect the MR02 or MR04 cables to the connection box on the square pipe on one end and to the connection box under the signal converter on the other end. Connect the right connectors to the right place (numbering!). Fix the cable gland PG16 tightly to establish a good environmental protection. ● Close both connection boxes, while taking care that the gaskets are well placed. ● Connect the power supply and output cable to the converter (Installation and Operating Manual 400/500).
9.0 Zero-point measurement For ultrasonic flowmeters it is important to have a good zero-point. For making a zero-point it is very important to have a situation where the flow is absolutely zero. If that is not possible the default zero-point can be used, which is a good approximation. ● Have the fluid flow at a high flow rate for at least five minutes. Stop the flow and shut down the upstream and downstream valves (if available). ● Let the fluid stabilize until the displayed flow rate becomes stable.
