Page 12Parameter Specific Menu Functions 6202918menu.fmSection 3 Parameter Specific Menu Functions3.1 Calibration History This option allows you to review past calibration data.1. Press the MENU key to start from the Main Menu.2. Select Sensor Menu and press ENTER.3. Select the sensor by name and press ENTER.4. Select Calibration and press ENTER.5. Select Cal History and press ENTER.6. A pop-up box will appear with the calibration date and time of the sevenmost recent calibrations. Select Review Next Cal to step through thecalibration history screens. After the last calibration, press ENTER toreturn to the previous menu. To exit the Cal History Menu, press EXIT.Data displayed for the seven most recent calibrations include theconcentration (in ppm) of the 0.2 (low range) or 2 (high range) standard in thefirst column and the concentration (in ppm) of the 0.8 (low range) or 8 (highrange) standard in the second column. The values are based on the previouscalibration curve applied to the standards on the current calibration. If theprevious calibration was a default calibration (the first calibration) or ifconditions have changed (for example, if new reagents and standards havebeen introduced), then a shift is expected.3.2 Measurement OptionsThe analyzer allows several options for the display of concentration values.The units can be changed. Available options are ppm, ppb, mg/L, and μg/L.Note: If a Digital Display Module (DDM) is used, select SENSOR to DISPLAY in theNetwork Menu to set the output of the DDM.Important Note: Changing the displayed units will cause the stored data for theAquaTrend channel on which the units were changed to be erased.