2.2.5. Micro Dilutor
Micro dilutor is taking the prec
stepper motor, a motor opto board and the micro syringe.
2.2.6. Puffer reservoir
The glass puffer reservoir is directly connected to the pressure sensor.
During measurement, there is no pump activity, so the puffer reservoir maintains measuring
vacuum stable. The instrument measures atmospheric pressure and adjusts measuring
vacuum according to it.
2.2.7. Pump
Pump generates regulated vacuum and drains the fluidic system. It is connected to the PPB
and it has its own driver circuit (Darlington).
If the tube of the peristaltic pump becomes worn, it can be broken, causing Pressure error.
It is recommended to check the state of the tube, and replace it every 2 years, or
after 20 000 measurements. Always replace the peristaltic pump tube to the same
PharMed® type, with the same length.
For servicing the tube of the pump, open the peristaltic pump from its top (see picture) and
remove the tube together with the white plastic side wall (see picture):
In case of damaged tubes, it can be replaced by a new one by opening the two metal locks
located at the two ends of the tube (see picture).
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