Ion Calibration Procedure - Oakton pH 5 Instruction Manual

Instruction Manual
available include 0.1, 1.0, 10.0, 100.0 ppm. Recalibrate and ensure that consecutive
calibration points are 1 decade apart from each other.
Ensure that you use new or fresh standard solutions during calibration. Do not reuse ion
standard solution as it may be contaminated and affect the calibration and accuracy of
measurements. Store standard solutions in a dry, cool environment if possible. Check
that ISE's and ion standard solutions are kept in good condition for best results.
Before use, remove any plastic protective cap of ISE (at the tip of sensor) and refer to
electrode instruction manual for proper operation. Rinse probes before and after each
calibration or sample measurement to avoid cross-contamination.
3.2.1

Ion Calibration Procedure

The Ion 6+ can measure various ions. Ion measurement requires ion selective
electrodes (ISE)—(sold separately) which measure a specific ion of interest—such as
ammonia or fluoride.
The available ion calibration values for the Ion 6+ are 0.1, 1.0, 10.0, and 100.0 ppm.
Pick any 2 or 3 consecutive values to use and prepare the corresponding ion calibration
solutions. Turn on the meter and select ion mode by pressing MODE key if necessary.
For best results, always begin with your lowest standard value, followed by the
next lowest standard.
1. Dip the ISE into your standard solution. Add ISA if required. Swirl it gently. Press
CAL key to begin calibration mode.
2. The display shows "CA" (to indicate calibration mode) momentarily followed by "0.1"
flashing. To select the appropriate standard, use and
-10-
pH 5+, pH 6+, Ion 6+
keys.