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Current Meter Maintenance Model OSSPC1

Current Meter Maintenance Model OSSPC1. Hydrographic Training Bandar Seri Begawan Brunei August 2010. Why Is This Important?. Ensures that induced errors in measurement from ‘mechanical’ sources are eliminated Prolongs life of current meter and components. Section 1 Prior to Gauging.

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Current Meter Maintenance Model OSSPC1

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  1. Current Meter Maintenance Model OSSPC1 Hydrographic Training Bandar Seri Begawan Brunei August 2010

  2. Why Is This Important? • Ensures that induced errors in measurement from ‘mechanical’ sources are eliminated • Prolongs life of current meter and components

  3. Section 1Prior to Gauging

  4. Procedure

  5. Important Points • Dispose of used current meter oil in a thoughtful manner • Place components on lint free cloth or paper • Ensure components do not come into contact with dust • Use ONLY approved HS current meter oil (PYG-17)

  6. Spin Test • Prior to spin test hold the current meter in the horizontal position, with fan facing directly to your mouth • Blow air forcefully and allow fan to spin for approx. one minute (to minimise any hydraulic pressure ) DO NOT SPIN BY HAND

  7. Spin Test Shaft Diameter 4.0mm • Spin test the meter against time (as per table shown) • Connect current meter to the counter and test operation Shaft Diameter 2.5mm

  8. Section 2During and After Discharge Measurements

  9. General Rule After every discharge measurement, (or one hour of use), the current meter should be disassembled, cleaned, re-filled with oil and reassembled, if continuing a discharge measurement.

  10. Procedure • Remove fan from meter shaft and dispose of used oil from meter body • Disassemble meter as shown in Section 1 • Undo the cleaning jar cap and ‘¾ fill’ with white spirit

  11. Place components on lint free cloth or paper (do not place in contact with dirt particles) • Place shaft in cleaning jar and agitate in order to flush out used oil • Fill body of meter with white spirit, place thumb over opening and shake • Empty and dispose of white spirit from meter body

  12. After Discharge Measurements • Refill with oil if continuing a gauging • Blow dry the shaft assembly, fan carrier and fan. • Assemble ‘dry’ if meter going into storage

  13. After Discharge Measurements • Spin test the current meter against time as shown in Section 1 • After the spin test is performed connect your current meter to the counter using the lead, to test the lead, reed switch and counter.

  14. Section 3Office Service

  15. When? • Once per month (if current meter is used regularly (daily?) How? • Use same procedure described under Section 2

  16. Section 4Calibration

  17. Calibration • •         Re-calibrate the current meter every 300 hours of use or once a year which ever comes first (see Hydrological Services calibration certificate for details) • •         To minimise freight costs, send only the body and fans requiring re-calibration • Note: Hydrological Services provides a re-calibration and repair service for all types of current meters.

  18. Section 5Troubleshooting

  19. MECHANICAL PROBLEMS

  20. ELECTRICAL PROBLEMS (Closed Circuit Fault)

  21. ELECTRICAL PROBLEMS (Open Circuit Fault)

  22. Questions?

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