User Guide

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5 PASSWORD
The Setup mode is to be accessed by entering a password code. The direct
accessed Set Point adjustment mode (SP1 and SP2) and the Calibration mode
can also be accessed through this password code procedure.
The αlpha pH 190 controller features two separate passwords:
• pH (or ORP) calibration mode and temperature offset password = 011
• Setup program password = 022
To enter the password:
1. Press the MODE key, and within 1 second, press the CAL/ENTER key. The
display reads P.WRD.
2. Press ENTER again. The display reads “P.000”. The first “0” flashes.
3. Press ENTER again to leave the first digit “0” and to scroll to the next
number.
4. Press the ▲or ▼keys to change the second digit to the desired password
number (1 or 2). Press ENTER.
5. Press the ▲or ▼keys to change the second digit to the correct password
number (1 or 2). Press ENTER. The display flashes the password that has
been entered.
NOTE: If you enter an incorrect digit, press MODE to step backward.
6. Press ENTER again. You are now in Calibration mode or Setup mode,
depending on password entered.
NOTE: In the Password Entry mode, if there is no key-press for more than 30
seconds, Controller will automatically revert to measurement mode.