USING THE MILLI-Q
Milli-Q Synthesis/Synthesis A10 48
5-2 STANDBY, PRE OPERATE AND PRODUCT MODE
WHAT IS STANDBY MODE?
STANDBY Mode is selected before attempting maintenance on the system. For example, you would
select STANDBY Mode before removing the Q-Gard Pack. The Inlet Solenoid Valve is closed in STANDBY Mode.
The Milli-Q will not have an hourly 5 minute recirculation of water in STANDBY Mode. A
Milli-Q Synthesis A10 will not perform a TOC analysis during STANDBY Mode.
In STANDBY Mode, you can move the POU Dispenser Trigger forward and then close it. This will open the POU
Dispenser Electric Valve for 10 seconds. This will allow the system to depressurise. An example of when this would
be needed is when you are about to remove a Q-Gard Pack.
WHAT IS PRE OPERATE MODE?
PRE OPERATE Mode is selected when the system is not dispensing water. For example, the Milli-Q
would be left in PRE OPERATE Mode during the evenings and weekends and during other periods of non use. The
Inlet Solenoid Valve is closed during PRE OPERATE Mode.
The Milli-Q will have an hourly 5 minute recirculation of water in PRE OPERATE Mode. This will
enhance the quality of the Product Water delivered from the Milli-Q. A Milli-Q Synthesis A10 will perform a single
TOC analysis immediately following the hourly 5 minute recirculation of water. The Inlet Solenoid Valve is open
during RECIRCULATION Mode.
The Milli-Q will have a 30 second FAST FLUSH mode every 3 hours of PRE OPERATE Mode. The FAST FLUSH
mode cleans the feedwater side of the UF Cartridge. This aids in reducing any built up layers of bacteria, pyrogens
and colloids.
WHAT IS PRODUCT MODE?
PRODUCT Mode is selected when you want to dispense water or when you want to get ready to
dispense water from the Milli-Q. PRODUCT Mode is when you can see the resistivity and temperature of the
Milli-Q product water. This is when you can see the Resistivity and Temperature of the Milli-Q Product Water. This
is when you would see the TOC values with Milli-Q Synthesis A10 systems.
PRODUCT Mode occurs because the POU Dispenser Trigger was moved forward. The Inlet Solenoid Valve is open
in PRODUCT Mode.
The Milli-Q will dispense for a maximum of 30 continuous minutes in PRODUCT Mode. Contact Millipore if you
need to dispense for more than 30 continuous minutes.
During PRODUCT Mode, there is no water coming out of the UF Reject tubing on the back of the Milli-Q system.
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