Hach 900 MAX ユーザーズマニュアル

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Probes must be calibrated to the sampler each time they are cleaned or 
replaced. Regular inspection and comparison to a hand-held pH meter can 
help determine the optimum cleaning and calibration schedule for 
specific applications.

From the Main Menu, select 

Place the pH probe into the first buffer solution, then press any key 
to continue. 

Enter the temperature of the first buffer solution using the numeric 
keypad. Press 

 to continue. 

Select the pH for the first buffer solution (4, 7, or 10 pH) using the 

 key, then press 

.

Remove the probe from the first buffer solution, rinse it under distilled 
water and place it into the second buffer solution (4, 7, or 10 pH, different 
from the first buffer used). Press any key to continue.

Select the pH for the second buffer solution using the 

 

key, then press 

.

If the pH probe is damaged and cannot be calibrated or if the buffer 
solutions do not fall within an acceptable range, an error message will be 
displayed as shown below.

Another attempt at reading the second buffer solution will be made after 
pressing a key. If this fails, it is likely that you have a bad pH probe or bad 
buffer solutions. Try a new set of buffer solutions and if that fails try a 
different pH probe

The probes are shipped with a wetting cap that covers the probe tip. Remove 
the cap by turning it counter-clockwise and gently easing it off. Keep this cap 
for long-term probe storage. Rinse the probe tip with distilled water.

Store the probe in a pH 4.0 buffer (Cat. No. 22834-49) for both overnight and 
long term storage. Never store a probe in distilled or deionized water because 
this will deplete the probe filling solution.

This connector is for installing the pH or ORP pre-amp interface junction box 
or a stand-alone temperature sensor. The ORP probe is attached to a 
terminal strip in the junction box.