Service manual

Section - V Repair or Replacement BT3000 PLUS Rev. 0, Soft Ver. 8 Page 18 sur 22
When replacing the cuvette wheel, position the small guide hole in the cuvette
wheel that coincides with the locating pin on the cuvette rotor.
Gently push the cuvette wheel downward onto the rotor. Fasten the cuvette wheel
securely by screwing the 6 socket head screws back onto the cuvette rotor. To
ensure that pressure is applied uniformly, first tighten all of the screws finger-tight
and then tighten them in a crosswise pattern. Do not use excessive force. Gently
push downward each cuvette until it bottoms against the depth of the rotor. Attach
any disconnected tubing to the appropriate ports. A thorough washing procedure
should be performed through the analyzer program before any testing is
performed on the analyzer.
NOTE: Another efficient method for cleaning the cuvettes may be used without removing the cuvettes
plate from its original position. Disconnect the aspiration tube located on top of the washing piston
carriage and insert it into the bottom of the cuvette for few seconds to aspirate any dirt or
contaminants. Repeat this procedure after manually rotating the cuvette wheel to clean off the
desired cuvettes. The high power suction produced by the vacuum pump will quickly eliminate any
dirt or contamination.
CAUTION
: It is required that a complete FCC procedure be performed after replacement of one or
more cuvettes. If the removal and replacement of cuvette wheel required no replacement of cuvettes,
only the "zeroing" procedure is required.
5-4.7. PHOTOMETER REPLACEMENT
The box containing the photometer module is mounted on the underside of the
base plate of the light source. Turn off the power to the analyzer before replacing
the photometer. The photometer module can be easily removed by unscrewing
the 4 mounting screws on the base plate. The new generation photometers (since
July 2004) are equipped with an additional connecting cable (having a pare of
male/female connectors) for the Reference Channel (Figure 5-23).
Caution: It is required that a complete FCC procedure be performed after replacement of the
photometer.
5-5 INTRODUCTION TO THE COMPUTER BOX
The LCD Display module, with fully integrated touch-screen, is on the front of the
computer box. An on/off switch for the analyzer is located on the bottom left of the
display. The peripherals, CD-ROM player and the floppy disk drive are accessed
through a cover just below the display.