4 Units Description 
4-
Precautions
: 
1.  The synchronous belt wheel which is fixed to stepping motor should keep the same 
installation height with the matched belt wheel so that the belt does not bear twisting 
force. 
2.  Use the BA30-K22 fixture to get appropriate tensile force of horizontal synchronous belt 
and  use  the  the  BA30-K21  fixture  to  get  appropriate  tensile  force  of  vertical 
synchronous belt. 
3.  The direction of horizontal and vertical stepping motors’ plug should face outside and 
upside respectively.   
4. 
Disconnect  correlative  power  cables,  data  cables  and  liquid  connecting  before 
performing the above steps.
 
4.3  Sample/Reagent Disk Unit 
4.3.1  Function Introduction 
The sample/reagent disk unit holds the sample tubes and reagent bottles and carries them 
to the specified position for aspirating sample or reagent. At the same time it is capable of 
refrigerating so as to keep the reagent stable and prevent it from volatilization.   
1.  Holding  sample  tubes:  Sample  containers  (tube,  microtube,  etc)  are  placed  on  the 
sample/reagent  disk  unit,  and  then  the  sample  probe  unit  aspirates  sample  and 
dispenses them into reaction cuvette. 
2.  Holding reagent bottles: Reagent bottles are placed on the sample/reagent disk unit, 
and then the sample probe unit aspirates reagent and dispenses them into reaction 
cuvette. 
3.  Programmed feeding: The sample/reageng disk unit carries specified sample tubes or 
reagent bottles to the aspirating position for aspirating according to the programmed 
period. The sample/reagent disk is driven by the drive assembly. 
4.  Reagent  refrigerating:  The  sample/reagent  disk  unit  is  capable  of  refrigerating  and 
keeping the reagents at 4-15°C for 24 hours a day so that the reagents are always 
stable and not volatilized. 
4.3.2  Components of Sample/Reagent Disk Unit 
The  sample/reagent  disk  unit  consists  of  reagent  refrigerating  assembly,  disk  drive 
assembly and disk assembly. See Figure 4-10.