Precautions for installation and use of online pH meter electrodes
Online pH meter is widely used in continuous monitoring of pH value in thermal power, fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water solutions. More and more people use online pH meters. The following summarizes the precautions for using the electrode line of the online pH meter, as follows: The value does not fluctuate; or PH=7.00 can be adjusted in place during calibration, and PH=4.01 cannot be adjusted in place. Generally, when it drops to PH5~6, it cannot continue to drop.
(1) The junction box of the online pH meter is damp, open the cover of the junction box, check whether there is water or moisture in the box, ensure that the box is dry, and check that the sealing performance of each part of the junction box is in place, and then calibrate OK, otherwise refer to the second step .
(2) The connection point of the electrode line of the online pH meter is wrong. Open the back cover of the main unit and the cover of the junction box, and check whether the opening of the electrode wire is correct. A common problem is that the black conductive rubber in the cable is not completely peeled off. There are three in total, including two in the junction box and one in the back cover of the host. Make sure it's OK to strip it and rewire and calibrate. Otherwise, see step 3.
(3) Online pH meter electrode cable copper inner core wire translucent insulating layer black conductive rubber copper mesh wire black insulating outer layer 3. The electrode sheath is watered to remove the electrode extension wire, the electrode moves with the entire protective layer to connect the casing to the host, Connect the core wire and net wire of the electrode directly to the GLASS and REF terminals of the main unit for calibration. OK, then refer to step 5.
Reminder: Otherwise, cut off the part of the electrode wire exposed in the junction box, reconnect the wire according to the requirements of step 2, and then connect the host to calibrate OK, otherwise the electrode will be damaged by moisture, disconnect the electrode sheath and check, if the shell gets water, moisture or The electrode is damaged, please replace the electrode.
(4) Is the electrode of the online pH meter broken? The third step, check whether the electrode is damaged, if so, replace the electrode.
(5) Water damage to the online pH meter electrode extension wire: In step 3, if the first calibration is successful, cut off the exposed extension wire in the junction box, and re-open the wire according to the requirements of step 2. Correct after the connection is normal, otherwise replace the extension cable.
