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fault |
Analysis |
Repair method |
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Temp shows 50℃ |
1. Temp part of electrode is damaged |
Change electrode or do the temp compensation manualy |
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2. Temp wire of electrode cable is damaged |
Change electrode cable |
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3. Instrument electric is damaged |
Return back to factory for repair |
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4. Manual temp is 50 ℃ |
Change to auto |
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5. Calibration wrong |
Calibrate again |
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6. Transmitter or electrode connector is damp. |
Dry it and store it in the clean and dry place next time. |
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Test value is 0.00μg/L |
1. The measurement part of electrode is damaged |
Change electrode |
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2. Measurement part of electrode cable is damaged |
Change electrode cable |
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3. Electrode did not connected or bad connected |
Reconnect electrode |
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4. Instrument electric is damaged |
Return back to factory for repair |
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5. The zero-Calibration is not qualified. |
Calibration the ZERO again. |
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Polarization electrode valve too big and reaction too slowly |
1. Electrolyte exceed the time limit |
Change electrolyte |
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2. Membrance is damaged |
Change membrance |
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3. Data in disorder |
Clean history data and recovery system |
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4. Electrode is damaged |
Change electrode |
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5. Electrode connector is damp. |
Dry it |
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Charege abnormal |
1. Battery is damaged |
1. Charge battery |
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2. Charge circuit damaged |
Change charge circuit |
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3. Charge block is damaged |
Repair charge block |
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4. 220V/50Hz cannot supply power normally |
Change power supply |
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5. Charge contact oxidated or bad connect |
Clean, repair or maintain |
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Measurment in a bad condation, sometime normal, sometime abnormal |
1. Electrode connect badly |
Reconnected well the electrode cable |
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2. Electric damaged |
Return back to factory for repair |
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3. Water sample temp or flow rate abnormaly |
Check water sample temp or flow rate |
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4. Pipe or connector seals badly |
Repair or seal again |
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On-site measurement value too big |
1. Oxygen leaks from pipe |
Check pipe for leak place and repair it |
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2. Bubble in the flow cell |
Remove the bubble |
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3. Water sample has a high oxygen concentration |
Control oxygen contentration |
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4. Electrode aging |
Recalibrate the instrument or change electrode |
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5. Membrace is damaged or calibration is wrong |
Change membrace, electrolyte or calibrate again |
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6. Transmitter or electrode is bad |
Maintenance or change it. |