Bio-Tek ELx405, Operator'S Manual, Page: 149 / 250

Clean Components
|
119
Use extra care when removing the Select , Select CW , and HT dual
manifolds . Hold the two manifolds together as a single unit when
removing or replacing.
7. Using the 9/64” (3.57 mm) hex wrench, remove the screws, washers,
and springs that hold the manifold(s) in place (see
Figures 25
,
26
, and
27 ). Carefully remove the manifold(s) and end plates.
8. Using a soft-bristled brush, thoroughly clean the outside of the
manifold(s). Clean the insides of each tube with the appropriate stylus
(aspirate/dispense). Flush hot water through the cross channels.
9. Rinse the manifold with deionized or distilled water. Check to see if
water comes out of all dispense and aspirate tubes. If not, soak the
manifold in hot, soapy water and repeat.
Caution. When reinstalling the manifold, only tighten the
screw-washer-spring assembly that holds it in place until you
feel the mechanical stop. You will damage the instrument if
you continue tightening past this point, and will void your
warranty .
10. When satisfied, reassemble the manifold and end plates, making sure
that the two o-rings are in place prior to reassembly.
Do not
overtighten the manifold screws.
11. Re-attach the mist shield; finger-tighten the two thumbscrews ( use no
tools ). Refer to
Attaching the Mist Shield
,
Chapter 2
,
Installation
.
12. Reconnect the power cable and turn on the washer.
13. Prime the system with deionized water by running DAY_RINSE or a
similar Maintenance or Prime program. Watch for leaks. If fluid leaks
out of the back of the instrument, firmly seat the tubing. If fluid leaks
from the manifold, try disassembling and carefully reassembling.
14. Verify aspirate/dispense performance visually or by performing the
Evacuation Efficiency Test
and/or
Dispense Precision Test
in
Chapter 5
,
Performance Verification/Qualification Tests
.
Replace the o-rings on an annual basis. Replace the 12 (or 24)
channel-end seals (rubber plugs) if they show signs of cracking or
drying out. See
Replacing the O-Rings and Channel-End Seals
on
page 136.
For additional cleaning, an ultrasonic bath may be used, or the
AUTOCLEAN program may be run (models with the Ultrasonic
Advantage™ only; see the AUTOCLEAN section on page 123).
DO NOT AUTOCLAVE
the manifold!
ELx405 Operator's Guide