60Standard programs5.4.6.1 Change of the default setting of the chemical form1. In the result display, press Options>More>Chemical Form.2. A list of available evaluation forms appear. Select the newdefault setting.3. Press Save as Default.The current result and all further readings will be displayed in thenew chemical form.5.4.7 Run a reagent blankSome of the stored tests/methods include the "Reagent Blank"function. This enables the reagent blank value to be measuredand then taken into account in calculating the reading result.Reading/analysis of a reagent blank:1. Prepare the test corresponding to thespecification/procedural instructions. Use distilled waterinstead of a sample to determine the reagent blank value.2. Select the test. Insert the zero solution into the cellcompartment, if required by the procedural instructions.Press Zero.3. Insert the prepared sample cell into the cell compartment.Press Read. The result will be displayed.4. Press Options>More>Reagent Blank.5. Press On to highlight the Reagent Blank function.6. The concentration shown on the button is the reading of thereagent blank. To use this value for more analyses of thisparameter, press OK.7. To change the value displayed on the button, press thebutton. Use the alphanumeric keypad to enter the new value.8. Next press OK.Note: The "Reagent Blank" function is deactivated when the readingprogram is left. To use the same blank value later for other tests usingthe same reagent lot, enter the value per step 7.Note: The results calculated using the reagent blank value must liewithin the limits of the measuring range of the test/method.
