9
1. Liquid Crystal Display (LCD)
2. SETUP key, to enter/exit setup mode
3. CFM key, to confirm values
4. CAL key, to enter/exit calibration mode
5. Up arrow key, to manually increase the value of
temperature or other parameters
6. Down arrow key, to manually decrease the value of
temperature or other parameters
7. SHIFT key, to activate the key alternate function
(press and hold first the SHIFT key and then the
second desired key)
8. “lock” key, to freeze current EC range on the LCD
or to clear pH calibration parameter
9. RANGE/MODE key, to select measurement unit
or switch the focused data and to select measure-
ment mode or pH resolution
10. ON/OFF key, to turn the instrument ON and OFF
11. HOLD/GLP key, to freeze the first stable reading
on the LCD and to display GLP information
12. Power supply socket
13. Conductivity probe connector
14. Reference input socket
15. BNC connector for pH or ORP electrode
16. Temperature probe socket
52
drops of AD70300 storage solution.
Note: NEVER STORE THE ELECTRODE IN DIS-
TILLED OR DEIONIZED WATER.
PERIODIC MAINTENANCE
Inspect the probe and cable. The cable used for con-
nection to the instrument must be intact and there must
be no points of broken insulation on the cable or cracks
on the pH electrode stem or bulb.
Connectors must be perfectly clean and dry. If any
scratches or cracks are present, replace the probe. For
pH electrodes, rinse off any salt deposits with water.
For refillable electrodes:
Refill the electrode reference chamber with fresh
AD7082 electrolyte solution. Allow the electrode to
stand upright for 1 hour. Follow the storage procedure.
pH ELECTRODE CLEANING PROCEDURE
Soak the electrode tip in deionized water for approxi-
mately 30 minutes.
IMPORTANT: After performing a cleaning procedure,
rinse the electrode thoroughly with deionized water and
soak it in AD70300 storage solution for at least 1 hour
