YOKOGAWA EXA TB TB400G, Руководство пользователя

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<7. MAINTENANCE>
7-9
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
<Cleaning Procedure for the Calibration Plate>
Dust and dirt on the surface of the calibration plate should be cleaned in the following procedure:
(1) Wiping with the Silicone cloth of accessories or cleaning by washing
If there is dust on the surface, remove it in a manner of lightly wiping with the Silicone cloth. Do
not, in this case, rub hard on the surface.
If dust or dirt is not removed merely by wiping, wash the surface letting tap water flow on the
surface. After cleaning, drain off the water, and wipe up the remaining water with the Silicone
cloth or tissue. In doing this, do not rub the surface.
(2) Cleaning with detergent
If dirt is stuck on the surface through contact with your hand, or dirt cannot be removes even
with wiping as described in (1), clean the plate with a detergent. Cleaning should be done in the
following procedure:
(1) Dissolve a suitable quantity of detergent in a certain amount of tap water and immerse the
calibration plate in the solution.
(2) Swirl the calibration plate around in the solution to remove the dirt from the surface.
(3) If the dirt cannot be removed only by swirling the plate around, wipe the surface lightly with
tissue that has been dampened in the solution to remove dirt.
(4) After dirt has been removed, thoroughly rinse off the solution using tap water and drain off
well the water droplets remaining on the surface.
(5) Wipe up the remaining water with the Silicone cloth or tissue. In doing this, do not rub the
surface.
NOTE
• Avoid rubbing the surface with any material.
• For cleaning, do not use agents other than a detergent (e.g., a solvent such as ethanol,
acetone, etc.).
• For cleaning, also avoid touching the surface with your fingers.
• If the surface gets scratched, a correct turbidity reading cannot be obtained. Be sure to
exercise care in handling.
7.7.2 Span Calibration Using Standard Solution
Span calibration is carried out normally with the calibration plate. However, if the standard
solution is to be used, do it in the following procedure.
(1) Prepare 10 liters or more of the standard solution (see Subsection 7.15.2).
(2) Select FUNCTION "D." in the <PROGRAM1> mode and change the setting to "OFF".
"OFF" means calibration with the standard solution ("ON" is set upon shipment from the
factory).
(3) Select FUNCTION "4" in the <MAINT.> mode. => "Turbidity value" is displayed.
(4) Stop supplying the measuring water and once drain the measuring water into the detector.
(5) Drain several times using "zero water" and remove the dirt on the detector and header tank.
Finally, stop the "zero water" and drain off the detector and the header tank so that no water
remains in them.