Accumet XL 20 User Manual
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57Ion Setup: Temperature Compensation/Isopotential Point/Alarm LimitsXL25, 50 and 60 metersSet Apply Temperature CompensationIon concentration is a temperature dependent measurement. Best results are obtained when thestandards and the samples are standardized and calibrated at the same temperature. However, ifyou have experimentally determined the isopotential point of your electrode then you can chooseto set ATC to YES and enter the isopotential value. This option is set to NO by default.To set Apply Temperature Compensation1. Touch YES to choose Apply Temperature Compensation.Set Isopotential PointThe isopotential point is the millivolt reading for an electrode at which temperature has no effecton the measurement. Ion Selective Electrodes, unlike pH electrodes, are not designed to achieveany particular isopotential point. If samples and standards are at different temperatures whenperforming ISE experiments, it will be necessary to experimentally determine the isopotentialpoint of your own Ion Specific Electrode.To set Isopotential Point1. Touch the Isopotential Point box and use the numeric keypad to enter the desired mVsetting for the new isopotential point.2. Touch Enter to accept this value and return to Ion Setup screen.Set Alarm LimitsThis option allows you to set alarm limits for the ion measuring mode. If the ion concentrationvalue of the measurement is outside of the boundaries set by the minimum and maximum limits,a visual warning will appear to let you know that your sample measurement was outside of the setlimits.The validity range of alarm limits is 0.000001 to 99,900,000,000.To set Alarm Limits1. Touch ON or OFF to set the status of the alarm.2. Touch the Low box and use keypad to enter the new limit values.3. Touch Enter on the keypad to accept this limit and return to the Ion Setup screen.4. Touch the High box and use keypad to enter the new limit values.5. Touch Enter on the keypad to accept this limit and return to the Ion Setup screen. |
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