The use of conductivity meter should pay attention to matters needing attention A operating temperature conductivity meter solution temperature exceeds 1600F/710 °C, can not be measured, otherwise damage the instrument. When the ambient temperature is lower than 0 °C, the pH meter electrode may be damaged, Be careful not to exceed the specified temperature range. Keeping the instrument near a heat source or in hot weather, the temperature can easily reach or exceed 1500F, which can result in inaccurate instrument measurements.

B Battery Replacement Dry the surface of the instrument, unscrew the back four screws, carefully open the back cover, remove the back cover, remove the battery, replace the new 9V alkaline battery, close the back cover, and tighten the screws.

Note: Because the non-erasable readable memory is installed, the recorded data and calibration change settings stored in the memory will not disappear even if the power is turned off or the battery is replaced.

CpH/ORP electrode replacement electrode type RPR, please confirm the instrument model and serial number when ordering, to ensure that the correct electrode model is selected, each instrument is equipped with the corresponding electrode model. Conductivity meter D electrode cleaning 1) The conductance/TDS/resistance conductivity cell should be kept as clean as possible. Rinse the electrode cell with enough clean water to prevent the accumulation of impurities on the electrode. However, very turbulent solutions, especially those containing squamous particles , It is easy to precipitate in the battery to form a thin film, which reduces the accuracy of the test. Once the oil film is formed or dirt is deposited on the electrode, it can be accurately tested by cleaning with an ordinary non-corrosive cleaning agent and washing it with clean water. Now.

2) pH/ORP

Neutral pH/ORP electrodes are made of non-renewable materials. The surface of the porous electrode is in contact with the sample and cannot be in a dry state. If the electrode pool is dry, clean the electrode with a liquid sprayer such as WindexTM or FantastTM. Pool and rinsing, sometimes the electrode can resume activity, can not scrub or wipe the electrode.

The following method can also be used:

a Add hot (600C) salt solution, preferably hot KCl solution, or saturated NaCl solution, and cool to room temperature, recalibrate the measurement.

b Add DL water and soak for less than 4 hours. For too long, it may cause dissolution rate to decrease or destroy the glass electrode) and recalibrate the test.

Drift may occur due to a thin film on the pH electrode, spray WindexTM or FantastTM cleaning solution, and rinse. Note that the electrode bulb is very fragile so you cannot scrub or wipe the pH/ORP electrode.

Electrolysis of electrodes with high pH (alkaline) for a long time in the pH electrode cell can also damage the electrode. Immediately after the test, pour out the solution and use MYRONL storage solution (KCl, pH=4 buffer solution or saturated salt solution). Depending on the user's own situation, rinse and refill the electrode pool, cover and store the protective cover. Chloride, sulfate, and NH4-N solutions may also cause damage to the pH electrode. If you want to test the pH of such solutions, it is recommended that after the test, rinse with clean water, then rinse and store with the storage solution. Many of the components contained in the sample have a reduction effect on silver, so many substances, especially cyanide, can easily damage the electrode.