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Summary of Contents for SATO KEIRYOKI SK-620PH
- Page 1 Instruction manual No. 6400-00 Handy type pH meter Model SK-620PH No. 3 Nishi-Fukudacho, Kanda, Chiyodaku, Tokyo 101-0037 Japan URL: http://www.sksato.co.jp/english/ M.09...
- Page 2 PHP series is connected. Doing so could damage the electronic circuit of this instrument. Read this instruction manual before using the SK-620PH and keep it in a safe place for future references. Important safety instructions The SK-620PH is not explosion-proof.
- Page 3 Cautions before use Check that the instrument has not been damaged during transport. If damage is found, contact the store where you purchased the instrument or our service network. Do not dispose of the carrying case until you have confirmed that the instrument works properly. The carrying case will be needed when returning the instrument for repair or replacement.
- Page 4 (6) pH/mV key : Press this key to switch the pH and mV in the upper LCD in measurement mode. Increases (↑) the pH values to be calibrated in the calibration mode. Increases (↑) the set temperature value in the manual temperature measurement mode.
- Page 5 (32) Glass electrode protection bottle: Contains the phthalate pH standard solution (set at the factory). Precautions in use For proper use of the SK-620PH, be sure to observe the followings: - This is a precision instrument. Be careful not to drop or knock it.
- Page 6 - This instrument is not waterproof. Do not place it in water or use it where it may be splashed with water. - When used outdoors, keep the unit out of rain or water splashes. If it becomes wet, the unit may fail. - If the unit will not be used for a long period of time, always remove the battery.
- Page 7 Installing a Vinyl Cover on the Unit To protect the SK-620PH main unit from water splashes, we recommend putting the vinyl cover on the unit before use. The cover also prevents the unit from becoming dirty. (1) Open the cover mouth and place the unit inside. When the unit is in the cover, its back side should be aligned with the Velcro closure side on the vinyl cover.
- Page 8 After replacing the battery c) When very accurate measurement is necessary For more accurate measurement, calibration of about once a day is recommended. For calibrating the SK-620PH, prepare the following items. pH 4 standard solution (phthalate solution): pH 4.01 (at 25°C) pH 7 standard solution (neutral phosphate solution): pH 6.86 (at 25°C)
- Page 9 (4) Absorb the water on the glass electrode, and then press the CAL key to enter the calibration mode. Check that [4.00] is displayed on the LCD and "CA: Voltage" appears on the display. Note: "Err" is displayed on the voltage section of the LCD, if the sensor probe is not connected to the unit or the glass electrode is dry.
- Page 10 Note: The table below shows the pH value range to be entered for calibration. Calibration point pH value range pH 4 3.50 to 4.50 pH 7 6.50 to 7.50 pH 10 9.50 to 10.50 Note that it is not possible to perform calibration using the oxalate standard solution (pH 1.68 at 25°C) or borate standard solution (pH 9.18 at 25°C) CAL key REC key...
- Page 11 (2) Press the PWR key to turn on the unit. The whole LCD lights up for approximately three seconds. The unit enters the measurement mode. (3) Remove the glass electrode protection bottle from the sensor probe. (4) Immerse the sensor probe at least 3 cm deep into the material to be measured. (5) Read the pH value when the reading becomes stable.
- Page 12 (The cable is available as an option.) (1) Insert the plug of the optional RS-232C cable all the way into the RS-232C jack on the SK-620PH. (2) Next, connect the other side of the cable to the serial port on the computer.
- Page 13 * Communications protocol (1) pH display and the temperature (positive) display: (2) pH display and the temperature (negative) display: (3) mV display (positive voltage) and the temperature (positive) display (4) mV display (negative voltage) and the temperature (positive) display (5) mV display (resolution: 1 mV) and the temperature (positive) display (6) The sensor probe is not connected (pH display: error, temperature display: 25.0) Example) When the pH is 7.55 and the temperature is 25.2°C, the RS-232C output is as follows.
- Page 14 If the problem remains after checking the connection between the main unit and the sensor and after washing the glass electrode, the sample to be measured may be pH 14 or higher. Error code The pH value set in the calibration Set the same value for the calibration value and mode and the standard solution pH the pH standard solution value (-->...
- Page 15 Specifications Cat. No. 6400-00 Handy type pH meter Model SK-620PH Measuring factors Hydrogen ion concentration (pH), Voltage, Temperature (liquid temp.) Voltage Temperature Display Range 0.00 to 14.00pH -499 to 499mV -6.9 to 92.4℃ (Main unit) ±1mV (±0.1 to 195mV) ±0.1℃(at 10 to 40℃) Accuracy ±0.02pH...
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