14The top line will display “Cl Calibrated to” and a number. The number displayed is the last valuesomeone entered for the calibration. The bottom line will display “Cl Sensor was” and a number. Thisnumber is the sensor reading without any calibration at the time of the last calibration. If there is a largediscrepancy between these two numbers, the sensor was calibrated improperly or there is a problem withthe analyzer. The value displayed normally on the main screen and the value the analyzer uses todetermine dosing rates is the calibrated value.24) Press OK.25) Enter the password. Press the up arrow or down arrow until the password is reached.26) Press OK.27) Press OK again.The display will now show “Calibrate Cl to” on the top line and “Sensor Reading” on the bottom line. The“Sensor Reading” is the current reading of the sensor with no calibration. The “Calibrate Cl to” value isthe new value which you want to set.28) Press the up arrow or down arrow until the value is the same as the value given by the digitalphotometer.29) Press OK to save the new calibration or Esc to abort without saving.30) Press Esc to return to the main display.3.7.2 Calibrating other Sensors and MetersCalibration of other sensors and meters is similar to the chlorine calibration and requires the use of areliable external testing device or standard solution. See the supplemental manuals for each sensor ormeter for specific information on calibration.3.8 Technician Menu SetupThe Technician menu includes advanced parameter settings that are accessible separately from theOperator menu. Anyone can view the settings, but only someone with technician password can change.This has been done to allow only those who are qualified to change the advanced analyzer settings.These are also settings that should not require frequent changes after the initial installation and set-up.