Malvern MPT-2, User Manual, Page: 16 / 85

Chapter 1 Introduction and hardware
Page 1-10 MAN 0318
If only one titrant is requested to dispense, its respective solenoid valve will open to
allow the titrant to be delivered when the syringe ascends. The other two solenoid
valves will stay closed so any titrant dispensed will return to the correct titrant con-
tainer.
ill 8737

Titrant containers
The titrant containers contain the solutions that will be added to the sample during
a titration measurement sequence. Each container can hold either acid, base, salt, or
an additive. The tubing connectors from the top of the titrant containers are colour
coded at the manifold to match LED indicators (below) and the colours in the
Titrants SOP dialogue.
How to fill, change and insert the titrant containers is described in Chapter 4 .

Titrant indicators
Each titrant container has an LED indicator alongside that illuminates whenever
that titrant is being dispensed. The three LEDs are colour coded (red, yellow and
green) to reflect the colour coding in the
Titrants SOP dialogue.

Pump head
The pump head is used to pump the sample (or cleaning fluid) through the cell.
The speed of the pump is set through the
Titrants dialogue.
Syringes
To sample container
From
Degasser
MAN0318-4.0 - MPT-2 Autotitrator-Degasser.book Page 10 Tuesday, September 4, 2012 12:15 PM