Instruction manual

When the unit is first powered on, it will be placed in IDLE mode. IDLE
mode indicates the unit is powered and waiting to be placed into
STANDBY by pressing the STBY button, or placed in RUN by pressing
the START/STOP button.
Note Do not put unit into IDLE mode or turn off the Barnstead TII
during non-work hours. Doing so will allow bacterial growth and other
contamination of the water in the system. As a result, the system will
require a lengthy rinse-up period at the beginning of the workday to
achieve high-quality product water.
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In RUN mode, the pump recirculates water through the cartridges and the
UV lamp. It is recommended that the Barnstead TII be left in RUN mode
during the day. In RUN mode, the purity meter display indicates the
resistivity (temperature compensated to 25°C) of the water available for
dispensing.
1. From IDLE or STANDBY, press the START/STOP button to put the
unit in RUN mode. The Barnstead TII’s pump will begin to run and
display the purity of the product water if the water level is above 25%.
2. Allow the water’s purity to rise to the desired level before dispensing
water. Also, in the RUN mode, the RO operation automatically turns
on to fill the reservoir as needed. When the reservoir is full, the RO
system will automatically return to STANDBY.
Type II Water System 4-3Thermo Scientific
Section 4
Using Your TII
Idle Mode
Figure 4-2. Idle Mode Screen
DI Run Mode
(a) (b)
Figure 4-3. DI Run Mode Screens - a) DI system in Run and RO system in
Standby, b) RO and DI systems both in Run.