Longrun LRF-3000S

LRF-3000S Ultrasonic Transit-time Flow meter

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5.7. Frequency Output ........................................................................................................................ - 18 -

5.8. Totalizer Pulse Output ................................................................................................................. - 19 -

5.9. Alarm Programming .................................................................................................................... - 19 -

5.10. 4-20mA Analog Output Calibration ............................................................................................. - 19 -

5.11. SD Card Operation ...................................................................................................................... - 20 -

5.1.1. Specifications ....................................................................................................................... - 20 -

5.1.2. Install or Remove the SD card while the meter is powered on ............................................ - 20 -

5.1.3. ESN ...................................................................................................................................... - 21 -

6. Windows Display Explanations ................................................................................................................... - 22 -

6.1. Windows Display Codes .............................................................................................................. - 22 -

6.2. Display Explanations ................................................................................................................... - 24 -

7. Error Diagnoses ........................................................................................................................................... - 44 -

7.1. Table 1. Error Codes and Solutions (during operation) ............................................................... - 44 -

7.2. Frequently Asked Questions and Answers ................................................................................... - 45 -

8. Appendix3 – Serial Interface Network Use and Communications Protocol ................................................ - 46 -

8.1. Overview...................................................................................................................................... - 46 -

8.2. Serial port definitions................................................................................................................... - 46 -

8.3. Direct connection via RS232 to the host device .......................................................................... - 47 -

8.4. Communications protocol and the use ......................................................................................... - 47 -

8.4.1. HL Protocol .......................................................................................................................... - 47 -

8.4.2. MODBUS-I Communication Protocol................................................................................. - 49 -

9. Appendix6 - Flow Application Data .............................................................................................................. -55-

9.1. Sound Velocity for Various Materials Commonly Used ................................................................ -55-

9.2. Sound Velocity in Water (1 atm) at different temperatures .......................................................... - 56 -

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Longrun LRF-3000S - Page 4

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