HACH LANGE 2100N User Manual
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Contents
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7. Use the oiling clothto apply the oil equallyto the surface of thevial. Remove theexcess oil. Make surethat the vial is almostdry.8. Put the vial in thesample cell holder withthe triangle on the vialaligned with thereference mark on thesample cell holder.Close the cover.9. Push ENTER.The instrument displaycounts down, thenmeasures the standard.The next expectedstandard (e.g., 20.00) isshown. The S1 lightturns on.10. Remove the vialfrom the sample cellholder.11. Do steps 5–10 forthe other StablCal vials(from lowest to highestNTU standard).The S0 light turns onafter the last vial ismeasured.12. Push CAL.The instrument savesthe new calibration dataand goes back toMeasurement mode.StablCal standards storage• Do not move a StablCal standard to a different container for storage.Keep StablCal standards in the plastic case provided with the coverclosed.• Store at 5 to 25 °C (41 to 77 °F).• For long-term storage (more than one month between use), keep at5 °C (41 °F).Using Gelex secondary standardsThe Gelex secondary standards are used when a calibration check or anoptical system check is done. Refer to Calibration verificationon page 16 and Optical system check on page 16.Gelex notes• Measure the Gelex secondary standards on the instrument on whichthey will be used. The measured values can only be used for oneinstrument due to small differences in glass and instrument opticalsystems.• Do not keep a Gelex vial in the instrument for more time than isnecessary to complete measurement. The heat from the lamp canchange the turbidity value of a Gelex vial.• Keep the Gelex standards at room temperature. Do not let Gelexstandards freeze or become warmer than 50 °C (122 °F). Hightemperatures may cause Gelex suspensions to divide.• Make sure that the Gelex standards are at ambient instrumenttemperature before measurement.English 13 |
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