palintest Macro 900 Operation Manual

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palintest Macro 900 Operation Manual Manual pdf 76 page image

Macro 900 Operation Manual V3© 2013 Palintest Ltd. www.palintest.com Page 76 of 147The dates shown to the right of each point are the dates of the lastsuccessful calibration.7. Select Pt-1. The screen will change to:PLEASE WAITStabilising000%The Meter will wait until the readings are stable, then it will sendthe calibration command to the Probe, where the calibration takesplace. During calibration, the Calibrating screen is displayed and theprogress counter counts up. If the calibration is successful, thecounter will reach 100% and the following screen will be displayed.Offset:2500mVCalibrating100%Press [OK]The Calibration Report on the top line displays the voltage outputfrom the probe in millivolts (mV). This value is not stored inmemory so should be noted down in a calibration record book forthe probe.15.4.7. Calibrating Point 2Remove the Probe from the calibration bottle, shake off any excess water thendry the outer sleeve with a soft cloth.Fill a calibration bottle with freshly mixed Rhodamine calibration solution anddrop the Probe in all the way. Again, bang the Probe against the bottom of thebottle several times in order to remove any air bubbles that may be clinging tothe probe.Follow the procedure detailed above for Zero point calibration as far as step 6,then select Pt-2. Wait while the Meter stabilises and calibrates.After successful calibration, the ‘Calibrating 100%’ screen will be displayedalong with the Calibration Report, which will show the voltage output from theprobe in millivolts (mV). Press the OK key to continue. The reading on theMacro 900 Meter directly after calibration should be approximately 118 μg/L at20ºC (this value will vary with temperature).Calibration is now complete.15.4.8. Errors During CalibrationIf a problem occurs during calibration, an error message will be displayed.Refer to Error! Reference source not found. in section 10 for error messagehandling.