ORP-169 Portable Water Quality Monitor Digital ORP Tester Pen Detachable Water ORP Meter

ORP meter 1： Main technical indicators: Measurement range: -1999-1999mv Resolution: 1mV Accuracy: ± 5mV Working voltage: 4 * 1.5V (AG-13 battery) Working temperature: 0 ℃~50 ℃ Correction: 1 point correction Volume: 188mm * 35mm * 35mm Weight: 118g 2： Operating steps: 1. Remove the protective cover. 2. Tap the "ON/OFF" switch to turn on the power. 3. Place the electrode in the tested solution, gently shake it, and read the displayed value after it stabilizes. 4. Tap the "HOLD" key to maintain the current measured value. If you need to re measure, press the "HOLD" button again to automatically release the hold state. 5. After use, press the switch, clean the electrode with distilled water, and put on a protective sleeve. 3： Precautions: 1: White crystalline salts appear around the electrode, which is a normal phenomenon of ORP electrodes. Only by immersing the electrode in clean water can it dissolve and disappear 2: When testing the ORP value, it usually takes a few minutes to about 10 minutes. When waiting for the value to stabilize and jump very slowly or up and down, read the displayed value as the measured value 3: The display values of ORP and air are random and irregular, which is a normal phenomenon 4: After use, please turn off the power, clean the electrode with pure or distilled water, dry the water with a soft tissue, and then put on a protective cover. Battery installation: If the display is blurry or not displayed, the battery should be replaced in a timely manner. When replacing the battery, unscrew the upper cover to replace it. Pay attention to the polarity of the battery.