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Set Default pH Cal.
Process pH Cal.
Buffer pH Cal.
Cal. Date :01/01/01
It is recommended to perform pH calibration when the probe is replaced and after any cleaning action.
The analyzer can perform 2 points calibration, 1 point calibration or process pH calibration.
To perform any pH calibration enter in “pH Menu” - “Cal. pH Probe”.
In this menu the last calibration date is displayed on the “Cal. Date” line. If the probe calibration is
older than 1 month, a warning is displayed.
Initial Preparation
Pour small quantities of pH 7.01 (
HI7007
) and pH 4.01 (
HI7004
) or pH 10.01 (
HI7010
) solutions
into individual beakers. If possible, use plastic beakers to minimize any EMC interference. Also NIST
buffers of pH 6.86 or 9.18 could be used.
pH CALIBRA
TION (PCA320, PCA330, PCA340)
For accurate calibration use two different beakers for each buffer solution, the first one for rinsing the
probe and the second one for calibration. By doing this, contamination between buffers is minimized.
Unscrew the probe from its position. Take care to stop the sample flow before removing the probe. If
necessary, disconnect the probe from analyzer to prevent the damage of the probe cable.
ONE POINT CALIBRATION
Immerse the pH probe into the buffer solution (e.g. pH 7.01) until the metal ring is
immersed, then stir gently.
Select the “pH Menu” - “Cal. pH Probe”-“Buffer pH Cal.”.
• The analyzer will prompt to select the first buffer. Select the buffer (e.g. pH 7.01)
using up or down arrow keys and confirm.
• The analyzer checks for readings stability. During this period, the “Wait for stabilize” message is
displayed.
Buffer 1 pH:
7.01
Measured pH:
7.02
Temp.
[ºC]:
25.1
Wait for stabilize
pH 7.01
Probe
