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Summary of Contents for SATO SK-640PH
- Page 1 Instruction manual No. 6422-00 Handy type pH meter Model SK-640PH No. 3 Nishi-Fukudacho, Kanda, Chiyodaku, Tokyo 101-0037 Japan URL: http://www.sksato.co.jp/english/ N.11...
- Page 2 This product is designed to measure hydrogen ion concentration (pH) and temperature (liquid temperature). Do not use this instrument for any other purposes. Read this instruction manual before using the SK-640PH and keep it in a safe place for future references.
- Page 3 Otherwise, electrical shock or short-circuit may occur. Overview The SK-640PH pH meter is easy-to-operate instrument for measuring hydrogen ion concentration (pH) and liquid temperature. The meter can be calibrated at three points (pH4, pH7 and pH10) and provides reliable measurements by using the built-in automatic temperature compensation.
- Page 4 • Main unit ① Display : Displays measurement readings or status of the unit. ② PWR key : Press this key to turn on the unit. To turn off the unit, press the key again. ③ CAL key : Enters the calibration mode. ④...
- Page 5 • ⑫ Display of pH or mV : Displays pH values or mV values in the measurement mode. Display the calibration values in the calibration mode. ⑬ Display of temperature : Displays temperature values in all modes. ⑭ Temperature unit : Indicates the unit (°C) of temperature measured.
- Page 6 Otherwise the measurement accuracy may be affected or malfunction may occur. 2. Installing a Vinyl Cover on the Unit To protect the SK-640PH 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.
- Page 7 ② When the "n" character appears on the display, release the CAL key. This cancels the auto power-off. Note: Auto power-off is no longer cancelled once the unit is turned off. Perform the auto power-off canceling each time as necessary. Glass electrode protection bottle To prevent the glass electrode from becoming dry, the PHP-31 sensor probe is equipped with a glass electrode protection bottle which contains the phthalate pH standard solution.
- Page 8 Before measuring (1) Connect the PHP-31 sensor probe to the main unit. (2) Press the PWR key. The whole LCD lights up for three seconds to indicate that the unit has been turned on. When the temperature of the sample liquid is known, disconnect the temperature sensor connecting plug and press the SKIP key for two seconds or more to enter the manual temperature setting mode.
- Page 9 (3) Thoroughly wash the glass electrode with water (distilled, pure or tap water). (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"...
- Page 10 voltage value is negative. Note that in the LCD, the symbol for minus is not displayed. Also, values displayed are 4-digit numbers; the voltage is displayed such as XXX.X mV. Note: The table below shows the pH value range to be entered for calibration. Calibration point pH value range pH 4...
- Page 11 Relation between pH value and temperature When performing calibration, set the pH value according to the temperature of the standard solution as follows; Standard solution Name of solution Temp. pH value Temp. pH value 0 ℃ 4.00 30℃ 4.02 5 ℃ 4.00 35℃...
- Page 13 About the glass electrode (1) Storage If left unused for a long time, the glass electrode becomes too dry to measure the pH accurately. The pH electrode works best and shows accurate readings when used with moderate moisture. When using the instrument for the first time after purchasing or a long storage period, we recommend placing the glass electrode in water (distilled, pure or tap water) or the pH standard solution for at least 12 hours and performing calibration before measuring.
- Page 14 Backlight function This instrument is provided with a backlight function. Pressing the key lights the LCD in green. This permits the pH readings on the LCD to be read easily even in a dark place. The backlight is automatically turned off approx. 20 seconds after it is turned on. This prevents the battery power from being consumed due to continuous use.
- Page 15 (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 16 pH display section 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 17 RS-232C communication The communication conditions or Check the communication conditions or is not possible. protocols are not correct. protocols. (-->About the RS-232C output) The serial port on the computer is Check that the serial port is open by referring to not open.
- Page 18 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 ±2mV (±185 to 499mV)
- Page 19 6400-40 PH40 Carrying case 6400-50 PH50 Electrode protection bottle...
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