Download Microlab 600 Basic User Manual - Sigma

CHAPTER 5: CARE AND MAINTENANCE
We recommend that you clean the instrument daily. The tubing and syringes should be purged
and primed at the end of each experiment and/or each work shift. To clean the Microlab 600,
flush the system with Hamilton Syringe Cleaning Concentrate (p/n 18311), ethanol or with 10%
chlorine bleach and deionized water solution. Avoid using caustic or acidic cleaning solutions.
Important! Leave the syringe and tubing filled with deionized water during prolonged inactivity.
This is important if you are using buffers or other salt solutions which could accumulate or
crystallize in the system. If buffers or other salt solutions are left in the fluid path overnight, crystals
may form and damage the syringe plunger tip.
5.4 Cleaning the Fluid Path
For highly critical applications the Microlab 600 should be cleaned on a regular basis. Use
Hamilton Syringe Cleaning Concentrate or ethanol to clean the fluid path. Steps on cleaning the
fluid path are listed below.
When the tubing and syringes come in contact with contaminated or hazardous samples, follow
safe laboratory practices in selecting and using a cleaning fluid to flush out the tubing and syringes.
WARNING! Follow laboratory safety procedures if the Microlab 600 instrument comes in
contact with hazardous materials.
Use a cleaner that is compatible with the fluids previously run through the system. Depending on
the sample that is being run, deionized water, urea, ethanol or 10% chlorine bleach and deionized
water solution may be used as a cleaning fluid. See Appendix D for chemical compatibility with
the Microlab 600.
Step 1. Prepare a reservoir of cleaning fluid and place the fill tubing in the cleaning fluid
reservoir. Use a tubing clip to secure the tubing in the reservoir vessel.
Step 2. Place the hand probe over the cleaning fluid reservoir.
Step 3. Press the Prime button to begin the prime cycle.
Step 4. Continue priming the system until the fluid path is clean. The number of cycles
required to clean the fluid path will depend on the size of the syringes and the level of
contamination present in the system. A good estimate is 5–10 cycles of the syringe or
5–10 times the internal volume of the fill and dispense tubing.
Microlab® 600 Basic Manual
Hardware Installation and Basic Operation
5-3