Table of Contents
Advertisement
I
10
I_
- RECOMMENDED CLEANING PROCEDURE
Keep the sensor reasonably clean to maintain measurement accuracy. The time
between cleanings (days, weeks, etc.) is affected by the characteristics of the
process solution and can only be determined by operating experience.
1.
2.
3.
4.
5.
6.
Remove most contaminate buildup by carefully wiping the inner electrode
rod, and the concentric outer electrode tube (inner and outer surfaces) with a
soft clean cloth. Then rinse the sensor with clean, warm water.
Prepare a mild soap solution. Use warm water and dishwashing detergent,
Borax hand soap, or a similar soap.
Soak the sensor for 2 to 3 minutes in the soap solution.
Use a small bristle brush, cotton swab (Q-tip), or pipe cleaner to scrub the
entire measuring end of the sensor, thoroughly cleaning the electrode surfaces.
If detergent solution cleaning cannot remove surface deposits, use muriatic
acid (or another dilute acid) to dissolve the deposits. The acid should be as
dilute as possible, but yet strong enough to clean. Experience will help
determine which acid to use and how dilute it can be. Some stubborn coatings
may require a different cleaning agent. For assistance in these difficult cases,
contact the OMEGA Service Department (see page 12).
Before cleaning with acid, determine if any hazardous reaction products could
form. (Example: A sensor used in a cyanide bath should not be put directly
into a strong acid for cleaning because poisonous cyanide gas could be
produced.) Acids are hazardous. Wear appropriate eye protection and clothing
in accordance with Material Safety Data Sheet recommendations.
Soak the sensor in dilute acid for no more
than 5 minutes. Rinse
the sensor
with clean, warm water and then place the sensor back into the mild soap
solution for 2 to 3 minutes to neutralize any remaining acid.
Rinse the sensor in clean, warm water.
Calibrate the analyzer using the procedure in the analyzer instruction manual.
If calibration cannot be attained, check the sensor using the procedure in Part
Three, Section
2.1.
- SERVICE AND MAINTENANCE
SECTION 1
- Service and Maintenance
PART THREE
m
CDE681 Part 3
2:14 PM Page10
7/17/03
M3594&0603-CDE681Series.qxd
Advertisement
Table of Contents
