Hach-Lange ISEF12103 User Manual - Manual (Page 10)

Option Description
Standard Units When Standard is set to Custom, sets the preferred unit for ISE check
standard—mg/L (default), µg/L, g/L, g/kg, mol/L, mmol/L, mol/kg, %, ppm or
ppb.
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 Sets the check standard reminder—On or Off (default).
The meter automatically shows the check standard screen if Reminder is On.
Allow Defer Allows the postponement of check standard reminders—Yes or No.
Measurement of the check standard can be delayed if Allow Defer is set to Yes.
6. Select Acceptance Criteria and update the settings:
Option Description
Acceptance Limits Sets the tolerance limits for check standard—1% to 20%.
Cal Expires on Failure Recalibration required if check standard fails—Yes or No.
The calibration expires if the check standard fails and Cal Expires is
set to Yes.
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 sensing
element or improper storage conditions.
• Slow response time occurs as a result of contamination on the sensing element.
• The slope is out of range as a result of contamination on the sensing element.
For general contaminants, complete the following steps.
1. Rinse the probe with deionized water. Blot dry with a lint-free cloth.
2. If harsh contaminants are attached to the probe, use a small amount of plain fluoride
toothpaste (no teeth whiteners or abrasives) and gently rub it into the crystal with a
circular motion. Continue to rub until the toothpaste film is removed. When finished,
rinse with deionized water to clean the probe.
3. Soak for 30 minutes in 1 mg/L Fluoride standard solution.
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