If temperature and conductivity are both being calibrated, always calibrate the
temperature first.
Be careful not to damage (avoid excessive twisting, bending, etc.) the sensor
leads when removing the sensor from the pipe fitting.
The conductivity standard solution may be used for temperature calibration when
combining the temperature and conductivity calibrations.
Step Two
– Go to the appropriate Settings data entry screen (25 or 26). Enter the
temperature of the calibration solution via the keypad. Press ENTER. A new
measured value will appear on the screen.
If the value displayed on the screen does not match the value entered for the
calibration solution, let the sensor equalize for a few more minutes and repeat Step
Two.
Troubleshooting
If problems occur during calibration, please check the following:
Ensure that the Settings screen corresponds to the sensor being calibrated.
Check the condition of the sensor. Make sure that the electrode surfaces are not
damaged, corroded, or fouled.
Make sure that the sensor is suitable for use with the AL250-V2. Verify that the
sensor is equipped with the proper temperature element (1000-Ohm Pt RTD).
Check the condition of the sensor wiring and that the sensor leads are properly
connected to the AL250-V2 terminals.
Refer to the Troubleshooting Section of the manual for more information.
SETTINGS [>]=[.]
>25< RW=xx CO=xx
FTemp Calibration
OLD=20 New=?
RW = Uncorrected Temperature
CO= Corrected Temperature After
Calibration is Applied
(Updates Only When "ENTER" is Pressed)
Settings Screen
Index Number
Calibration Value (Deg C) Previously
Used for Calibration
Enter Temperature of Calibration
Solution (Deg C) Via Keypad
4-3
