User manual EUTECH INSTRUMENTS CYBERSCAN PHION 510 PHION METER

[. . . ] Instruction Manual pH/Ion 510 Bench pH/Ion/mV Meter 68X090811 Rev. 6 08/04 Technology Made Easy . . . PREFACE Thank you for choosing the pH 510 pH/mV/Temperature or Ion 510 Ion/pH/mV/Temperature bench meter. The instruction manual functions in two ways: firstly as a step-by-step guide to help you operate the 510 series meter. The instruction manual is written to cover as many anticipated applications of the pH/Ion 510 Bench meter series as possible. [. . . ] The upper display flashes for a few seconds then "SLO" appears in the upper display with the mV indicator, the number in the lower display is the average electrode slope in mV (see Figure 6). Otherwise error message will appear in the LCD if the calibration was unsuccessful with no values stored into memory. NOTE: You may compare the average electrode slope value with the expected slope value for your electrode from your electrode manual to verify electrode operation. HINT: Minimum of 2 points and maximum of 3 points are allowed for Ion Calibration. valid calibration points are 0. 1, 1, 10 ppm or 1, 10, 100 ppm or 0. 1, 1 ppm or 1, 10 ppm or 10, 100 ppm. Figure 6: Slope value in mV Figure 7: Error message Er3 if slope not within range 10 Instruction Manual pH 510/ Ion 510 3. 3 mV Calibration 1. Make sure the meter is on and if necessary, press the MODE key to select mV mode. The [mV] indicator appears in the upper right-hand corner of the display. The [CAL] indicator appears above the upper display that displays the relative mV reading. NOTE: If you have never calibrated relative mV or if the meter has been reset, the value shown in the upper display is the same as the absolute mV value. The range of adjustment is -1999 mV to 1999 mV (resolution is 1 mV); of which from -199. 9 to 199. 9 mV the meter gives you a resolution of 0. 1 mV. 2. 3. 4. Press or key to enter the relative mV value that matches your desired reading. Press the ENTER key to confirm the reading and the meter automatically returns to the measurement mode. NOTE: New mV calibrations will override existing stored mV calibration data. The meter retains stored mV calibrations even when the meter is turned off. 11 Instruction Manual pH 510/ Ion 510 3. 4 Temperature Calibration In this calibration procedure, the ATC probe is attached to the meter and the [ATC] annunciator is displayed on the right hand side of the LCD. Dip the temperature probe into a solution of known temperature, such as a temperature bath for a few minutes until the temperature probe stabilizes. To perform temperature calibration, you must be in the pH measurement mode. Press MODE key to switch to the pH measurement mode if you are in the mV or ion measurement modes. Press or key to scroll to the correct temperature value corresponding to the known solution temperature. The meter allows a limit of ± 5 oC variation (with 0. 1 oC resolution) of the input reading, and of the original displayed reading. Once you selected the correct temperature, press ENTER key to confirm. 6. 7. 12 Instruction Manual pH 510/ Ion 510 4 MEASUREMENT 4. 1 Automatic Temperature Compensation (ATC) For ATC measurements, simply attach the temperature probe into the meter (see Section 2. 2). NOTE If you are using a temperature probe, the probe must be submersed in the liquid you are measuring so that the sample temperature can be 4. 2 Manual Temperature Compensation (MTC) Important: For MTC, you must disconnect the temperature probe. While in pH calibration mode, press the MODE key to enter temperature compensation mode. The upper display shows the current temperature setting and the lower display shows the default value 25. 0 ºC (if the meter has never been manually set for temperature) or the last manually set value if the meter has previously set for MTC. [. . . ] Record the solution temperature along with the pH value, or the measurement may be meaningless. Temperature changes also affect the signal the pH electrode sends to the meter and causes a loss of accuracy for the reading. To limit the loss of accuracy during calibration, make the temperature of the pH buffer calibrating solutions and the sample solution the same. 8. 2 Use of Standard pH Buffers Use standard buffer solutions to calibrate a pH meter before you measure the pH of a sample. They serve as reference standards for basis of comparison between measurement. [. . . ]