3. Rinse the electrode with clean water and wipe it dry.
Dip the electrode into the buffer solution pH 4.01 as
previous steps.
4. After slope calibration, pH 4.01 or pH 10.01, the
display will indicate the percentage of slope (PTS) to
show the status of the electrode. If the PTS is below
70% or above 130%, the electrode must be replaced.
A slope of 100% is ideal.
Note:
1. Calibration error indicator icon will appear, and “Err”
instead of “SA”, if calibration fails.
2. When doing a 2 or 3 point calibration, Calibrate with
buffer pH 7 first, and then follow with buffer pH 4 or pH
10.
3. pH calibration type “USA” or “NIST” can be changed in
advanced setting.
4. The calibration points of “USA” are 1.68, 4.01, 7.00,
10.01 and 12.45.
5. The calibration points of “NIST” are 1.68, 4.01, 6.86,
9.18 and 12.45.
<ORP>
Calibration is not necessary for ORP. However, it could be
tested with specific ORP standard solution to check
whether the electrode is good.
<COND, TDS, Salt>
1. Make sure the probe is Conductivity cell.
2. Dip the cell into the standard solution 1413
µS/cm. Stir
gently and wait until the reading is stable. Press and
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