First, the connection and power supply of the instrument Connect the mains power socket to the mains with the power cable, and ground the instrument reliably (otherwise it is easily disturbed and cause data fluctuations); Check whether the drainage hose is firmly installed (do not put the liquid hose The end of the outlet is not in the waste liquid, so as not to discharge the liquid). Inject distilled water (reference liquid) into the cuvette and turn on the power switch of the instrument. At this time, the heat number is displayed. If you need to modify, press a digit key and press The “Execute” button ends and the channel shows the concentration value. After the power is stable for 10 to 15 minutes, zero input and full-scale adjustment can be performed.

Second, zero input and full-scale adjustment In the daily use of the instrument, it is necessary to adjust the zero and full-scale work, the general zero does not need to be adjusted frequently, and can be adjusted once after each power-on.

Press the channel key, the channel digital tube's sign bit shows “U”, the remaining 4 digits show the signal percentage (transmittance U), press the zero ammonium button (sometimes sound), the zero point is input and stored Get up, then press the zero knob to return to normal. Adjust the channel full-scale adjustment knob so that the percentage of the signal is displayed as about 100.0. Press the full-scale button again and the full-scale will be tracked to 100.0. After the channel zero input and full-scale adjustment is completed, press the “EXIT” button.