Hach ORBISPHERE G1100 User Manual

Also see for ORBISPHERE 410: Basic user manual Quick operator's guide User manual Basic user manual Basic user manual

Contents

60Calibration Menu7.2.3 Zero calibration7.2.4 High-level adjustmentWith this method, the sensor should be exposed to pure N 2gas using the specially designed flow chamber. Provided thesensor is attached to the flow chamber, this calibrationmethod can also be automated. Refer to Configure automaticcalibration on page 59.Press Start to start the calibration.A screen is displayed showing the measured values andlength of time the sensor has been under calibration. Thesevalues are continually refreshed.The value % last calibration displayed in the top box is aninformational message showing the difference between thecurrent and previous sensor calibrations.The Signal within range and Stability reached boxes in thetop right corner indicate whether the calibration is withinacceptable limits. When both boxes indicate YES, pressFinish to accept the new calibration. A confirmation screenthen asks to accept and store the new parameters.If one or both boxes show NO, you can still perform acalibration but it is not recommended, and the calibrationshould be aborted by pressing the Cancel button.In the case of a calibration failure, attempt a secondcalibration after about 5 minutes. If the second attempt alsofails, then refer to your Hach Lange representative for advice.Note: If the Auto-End parameter is set (refer to Calibrationconfiguration on page 58), then the calibration will be deemedsuccessful when the parameters defined in Stop parameters aremet. You will then be asked to confirm the calibration.If you have not accepted or cancelled the calibration after anelapsed time of 10 minutes then the process will time-out, andthe warning message illustrated left will be displayed.This calibration exposes the sensor to a gas or a liquidsample with a known gas concentration. You also have theoption to reset the sensor’s calibration parameters to factorysettings (from drop-down list for Cal. sample).The screen example illustrated is for calibrating using a liquidsample. The screen for calibration using a gas bottle differsonly slightly.Press Start to start the calibration. The process is then thesame as for the zero calibration described previously.