INSTRUCTION MANUAL
11
•
Before use, immerse the sensor into 3.33 mol/L KCl solution (300) for 30 minutes or longer.
6.
Storage
7.
Maintenance
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Cleansing the sensing part
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Replacing the sensor
If any of the following symptoms is found after responsive-part cleaning, replace the sensor in the procedures below.
•
Sensitivity or response speeds do not recover.
•
The electrode can not be adjusted in the way mentioned in "4. Calibration" (page 10 ).
•
The electrode can not be calibrated with standard solutions.
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Replacing batteries
Note
•
Replace two batteries with new ones (CR2032) at the same time.
•
Do not touch the sensor terminal. It may be damaged by static electricity.
•
Make sure to remove the sensor prior to the converter cover. Removing the cover with the sensor attached causes
malfunction.
1
Press the power switch to turn OFF the power. The Meas. LED turns off.
2
Wash the electrode well with pure water to remove sample completely and wipe it
with filter paper, and store it in dry conditions.
Note
Avoid storing the electrode in a hot place or a highly humid place.
Keep the electrode dry and out of direct sunlight.
Dirt on the sensing part may affect the electrode response, sensitivity, or a mea-
surement precision. If the electrode is very dirty and cannot be washed clean using
pure water, clean it as follows.
1
Clean the sensing part by wiping it with cotton gauze containing cleans-
ing agent.
2
Rinse the electrode with pure water completely.
Note
Be sure to calibrate the electrode after cleansing the sensing part.
Type of dirt
Cleansing agent
Note
Do not use organic solvent (e.g. acetone, THF), strong acid or
alkali. Using these chemicals may damage the electrode.
General
Diluted neutral cleansing agent
Oily
Diluted neutral cleansing agent, or alcohol
Inorganic (AgCl, etc.)
Cleansing agent (220)
Turning off
Power switch
1
Turn OFF the power.
2
Turn the nut to the left to remove it. And pull out the
sensor from the converter.
3
Attach a new sensor referring to "
Note
Do not touch the sensor terminal. It may be damaged by static electricity.
When battery voltage is low, the Low Batt. LED blinks red.
(The LED is off during battery shutoff.) In this case, replace
batteries as follows:
1
Turn OFF the power.
2
Turn the nut to the left to remove it. And pull out the
sensor from the converter.
3
Replace batteries with new ones referring to "
Assembling sensor and converter" (page 9).
If used batteries are set, remove it by using a ball-point pen or the like.
4
Attach the sensor referring to "
Assembling sensor and converter" (page 9).
Turning off
Power switch
Nut
Turning off
Power switch
Nut
