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Note To interrupt the calibration procedure press SETUP to restart
the procedure, or CAL to exit to normal operational mode.
Note If the process meter has never been calibrated or an EE-
PROM reset has occurred, the meter continues to perform
measurements. However, the user is informed of an EC or
TDS calibration requirement by a blinking “CAL” indication
(see “Startup” section).
Note The device must be calibrated within the temperature range
specified for the EC or TDS buffer solution.
CELL CONSTANT DIRECT SELECTION
Whenever the EC/TDS probe cell constant is known, it is
possible to directly calibrate the meter using that value.
• Press CAL to enter calibration mode. The LCD will show
the default offset of 0.
• Press LCD to display the current cell constant on the pri-
mary LCD (factory default value is 2.000 cm
-1
).
• Press SETUP key.
• Using , and , enter the probe cell constant (the
value must be between 1.333 and 4.000 cm
-1
) and con-
firm by pressing CFM.
Note If the entered cell constant value is invalid, the “ERROR” indi-
cator blinks on the LCD.
Note Press SETUP before CFM to exit without changing the cell
constant.
CALIBRATION BUFFER DIRECT SELECTION
This feature allows to set a user-defined calibration point, in
order to perform calibration at a point different from the memo-
rized standards.
• Press CAL to enter calibration mode. The LCD will show 0.
