Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * FAX (708)331-8919
11. PRESOAKING OF INSTRUMENTS
For maximum effective cleaning, it is best if blood and other substances do not
dry on the instruments. Therefore, fill the tank with hot water and cleaning
agent and use the tank as a holding vessel for instruments until enough have
accumulated to warrant cleaning.
12. CLEANING AGENT
Use only Esma brand detergent concentrates when operating the E789
with metering pump. Esma produces 3 powerful liquid cleaning agents:
• Esma-Shine E105
• Esma-General Purpose E589
• Esma-Zyme E1240.
DO NOT use powdered detergents; some powders take too long to go into
solution. The metering pump is engineered to pump only the correct amount of
detergent concentrate into the tank during the fill cycle. Esma brand
detergents are formulated to meet the pump ratios. The metering pump has
been factory calibrated to meter in 180ml of detergent concentrate during the
fill cycle. By not using the correct cleaning agent problem can arise with final
rinsing of parts if too much suds are generated.
13. LOW LEVEL SENSOR
A low-level safety device is installed on the tank module to assure that the
ultrasonics will not come on if there is less than three inches of water in the
tank. A stainless probe is fixed in a Teflon plug mounted on the tank wall.
When the liquid in the tank covers the probe the ultrasonics will activate
during the clean or rinse cycles. Periodically, the probe should be wiped off to
prevent insulating residues from cleaning agents, etc. from accumulating.
14. PROGRAMMABLE CONTROLLER
An Omron CPM-20CDR programmable controller (PLC) is used to control the
FILL and CLEANING process. A peripheral device (C200h-PRO27-E) is available
to change the program or modify the times of the process. The memory
protection maintains the program during power interruptions and a flash
memory backup will save the program for 20 days at an ambient temperature
of 77°F. PLC status indicators, located on top of the PLC, show the operating
status according to the following table:
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