Malvern MPT-2, User Manual, Page: 15 / 85

Introduction and hardware Chapter 1
MPT-2 & Degasser Page 1-9
Dispersing area
Warning!
For safety reasons the dispensing area cover must always be in place during
a measurement sequence.
The dispensing area houses the dispensing syringes, titrant bottles, valves and the
pump head. The main features of the dispersing area are described below.
ill 8739

Dispensing syringes and syringe drive
The syringes are the mechanism for dispensing precise amounts of titrants from
the titrant containers to the sample container. When a titrant is requested the
syringe drive will descend to first obtain the titrant from the container, and then
ascend to deliver the titrant to the sample container; this is done in conjunction
with the manifold assembly and solenoid valves described below.

Manifold assembly and solenoid valves
The manifold assembly and solenoid valves control the flow of sample through the
cell. These valves are either opened or closed depending on the requirements of the
prime and titration sequences.
The solenoid valves open and close to control the flow of the titrant from the con-
tainer, through the manifold assembly, to the sample container.
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MAN0318-4.0 - MPT-2 Autotitrator-Degasser.book Page 9 Tuesday, September 4, 2012 12:15 PM