Moisture Analyzer Precautions

one. Electrolyte precautions

1. In the normal measurement process, every 100ml of the electrolyte can react with not less than 1g of water. If the measurement time is too long, the sensitivity of the electrolyte decreases, and the electrolyte should be replaced.

2. The electrolyte in the cathode compartment, if a strong air bubble is found during the measurement or the electrolyte is contaminated to a reddish-brown color, the blank current will increase, the reproducibility of the measurement will be reduced, and the end point will also be reached. It takes longer to replace the electrolyte as soon as possible.

3. If the titration time exceeds half an hour, the instrument is still not stable. At this point, the stirring is stopped. Observe whether there is obvious brown iodine on the anode at the bottom of the ceramic filter plate. If there is no or little iodine production, replace the electrolyte.

4. Be careful not to inhale or touch the electrolyte by hand. If it comes in contact with skin, rinse thoroughly with water. Due to the large odor of the electrolyte and the presence of certain toxic components, the laboratory should be well ventilated.

two. Measurement Considerations

1. When the sample is injected into the titration cell, the needle of the liquid injector is inserted into the electrolyte. The liquid solid sample injector and the sample should not come into contact with the inner wall of the titration cell and the electrode.

2. The instrument's typical measurement range is 10 to 10 mg. In order to obtain accurate measurement results, the amount of sample injection should be controlled according to the sample's moisture content.

Moisture meter common faults

one. Measuring open circuit

When measuring an open circuit, the status of the display shows an open circuit, and the measurement number will show the maximum. The display screen counts excessive iodine in the anode compartment electrolyte. The following conditions should be checked at this time:

1. Measure whether the plug and socket are in good contact.

2. Measure whether the electrode lead is open and whether the plug is soldered well.

two. Electrolytic open circuit

When electrolysis opens, the electrolysis curve does not. The display does not count.

At this point you should check the following conditions:

1. Electrolytic plugs and sockets are in good contact.

2. Whether the electrolytic lead on the cathode chamber is open circuit and whether the plug welding is good (when re-welding the plug, care should be taken that the anode and the cathode cannot be soldered wrongly).

3, cathode and anode electrode platinum wire welding point is open.

three. Measuring short circuit

When the short circuit is measured, the state shows iodine excess and the digital display does not count. In this case, check the following conditions:

1. Measure whether the plug or socket is short-circuited.

2. Measure whether the two ball ends meet together or if they are short-circuited inside.

3. Measure whether the electrode leaks. When the leakage time exceeds half an hour, the instrument titration time cannot reach the end point (this time it is not an electrolyte problem and the measuring electrode should be replaced).