Hach-Lange PHC10115 User Manual - Manual (Page 9)

4. Select Check Standards Options and update the settings:
Option Description
Standard Sets the temperature compensated buffer value for check standard—
• 4.01pH—25 °C
• 4.65pH—25 °C
• 6.86pH—25 °C
• 7.00pH—25 °C
• 9.18pH—25 °C
• 9.23pH—25 °C
• 10.01pH—25 °C
• 12.45pH—25 °C
• Custom
The standard value is shown on the Check Standard Options screen.
No temperature compensation for custom buffers.
Standard
Value When Standard is set to Custom, enter the standard value using the up/down
arrow keys.
5. Select Check Standard Reminder and update the settings:
Option Description
Reminder Repeat Sets the time interval for the check standard reminder—Off, 30 minutes,
2 h, 4 h, 8 h, 12 h or 24 h.
Allow Defer Allows the postponement of check standard reminders—Yes or No.
6. Select Acceptance Criteria and update the settings:
Option Description
Acceptance Limits Sets the tolerance limits for check standard—0.005pH (default) to
1.000pH.
Cal Expires on Failure Recalibration required if check standard fails—Yes or No.
7. If prompted, enter a name for the new method settings. Additional changes made to
the settings of an existing method are automatically saved with the same method
name.
8. Push EXIT until the meter returns to the measurement mode.
Maintenance
Clean the probe
Clean the probe when:
• Drifting/inaccurate readings occur as a result of contamination on the glass sensor or
the probe being left dry for extended periods of time.
• Slow stabilization time occurs as a result of contamination on the glass sensor.
• A calibration error occurs as a result of contamination on the glass sensor.
Before a rugged probe can be cleaned, the shroud must be removed (refer to Remove
the shroud on page 10). Install the shroud after the probe is clean (refer to Install the
shroud on page 10).
For general contaminants:
1. Rinse the probe with deionized water and blot dry with a lint-free cloth.
2. Soak the glass bulb for 12 to 16 hours in Hach Electrode Cleaning Solution.
3. Rinse or soak the probe for 1 minute in deionized water.
4. Soak the probe in pH 4 buffer for up to 20 minutes, then rinse with deionized water.
5. Blot dry with a lint-free cloth.
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