Service manual

Section - V Repair or Replacement BT3000 PLUS Rev. 0, Soft Ver. 8 Page 2 sur 22
5-1. ACCESS TO VARIOUS MODULES - INTRODUCTION
The BT3000 PLUS chemistry analyzer requires a series of mechanical
adjustments during the production and assembly process to assure optimal
performance. The same mechanical adjustment procedures that were followed in
the production are outlined here for field maintenance and repair.
The analyzer is based on a modular construction. Each module must be correctly
inserted into its proper location. Any positioning adjustments are facilitated by the
large tolerances on the mounting holes. It is important to check that the sampling
arm movement precisely coincides with all the operating positions. A fine
adjustment of positions can be made through the software. During the production
phase of the analyzer, a special reference mask (jig) is used to correctly position
the various modules in their locations. However, during maintenance and repair,
one must take care to operate, step by step, so as not to alter the original
assembly. Therefore, it is strongly recommended not to disassemble multiple
modules at one time. Instead, the modules should be serviced and calibrated one
at a time
5-2. REPAIR OR REPLACEMENT OF THE SERUM/ISE
SAMPLING ARM
Turn off all power to the instrument before replacing or repairing the sample arm.
Remove the casing and all of the parts necessary to access the arm subassembly
(see Figures 5-2 & 5-3). Disconnect the electrical cable and the liquid heater
cable. Unscrew the liquid line connector from the appropriate diluter. Unscrew the
sampling arm assembly 3 mounting screws. Gently lift the sampling arm module
and place it on a safe location. This operation may not seem simple but the figure
here facilitates the removal. Replace the repaired or substitute sampling arm
module in its appropriate location observing the preceding steps in reverse order.