【Replenishment timing】
As a general rule, replenish the internal liquid when its level becomes about 2cm away from the replenishment port of electrode,(The structure differs depending on the electrode, so please judge the estimated replenishment timing depending on the location of the internal electrode element, etc.)

【Replenishment amount】
If the electrodes are connected to the device, please be sure to turn the device’s power off and disconnect the electrodes.
Next, please take off the cap from the replenishment port and replenish the internal liquid, filling it to about 5mm below the replenishment port of electrode in a perpendicular state (to the extent that it will not overflow from the replenishment port if the electrode is slightly shaken).

If you let the internal liquid of the electrode run out it will not only be impossible to conduct proper detection but also may damage the electrode, so please check the amount of internal liquid regularly.