As-Needed/As-Required Maintenance
Sample Rack Decontamination
Maintenance UniCel DxC Systems Instructions For Use A13914
Page 10-118 October 2005
Sample Rack Decontamination
Clean sample racks as needed to decontaminate.
Decontaminating the Instrument
This procedure provides instructions for cleaning and decontaminating system tubing,
waste sumps, and reservoirs. Perform this procedure when microbial contamination is
either evident or suspected. This procedure should take about 1.5–2.0 hours.
Material Required:
• 10% bleach solution (1 part sodium hypochlorite 5.25% and 9 parts deionized
water) - 8 Liters
Step Action
1 Prepare a 10% bleach solution (one part sodium hypochlorite 5.25% and
nine parts deionized water). Use within 24 hrs.
2 Using a large container or sink, immerse all sample racks in the bleach
solution.
3 Allow the sample racks to soak at room temperature in the 10% bleach
solution for 15–20 minutes.
4 Remove the racks, rinse with deionized water or tap water, and allow to
dry.
NOTICE
Repeated decontamination of racks may result in rack label damage. If
the label starts to bubble or peel, remove and replace with a new label.
CAUTION
All biohazard precautions should be observed when doing maintenance,
service, or troubleshooting on the system. This includes but may not be
limited to wearing gloves and eye shields, and washing hands after working
on contaminated portions of the system.
Step Action
1 Shut down the hydropneumatic system as follows:
• Select the Utils icon from the icon menu bar.
•Select <5> Hydropneumatic Maintenance.
• Proceed to Step 2 only when the system shows the following message:
"The Hydropneumatic system has been shut down."
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