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Functional Description
Divert/Inject Valve
16 TSQ Series Hardware Manual Thermo Scientific
You can start and stop the syringe pump from the EZ Tune window, which is available by
choosing Start > All Programs > Thermo Instruments > TSQ > TSQ Tune. Refer to
EZ Tune Help for instructions on operating the syringe pump from the data system. You can
also start and stop the syringe pump by pressing the syringe pump button. By holding down
the button, you can run the syringe pump in Purge mode, where the flow rate is five percent
of the syringe volume per second.
The syringe pump light-emitting diode (LED) (see Figure 9 and Figure 10) illuminates green
whenever the syringe pump is pumping. The LED illuminates yellow if the syringe pump is at
the end of its travel.
Figure 6. Syringe pump
Divert/Inject Valve
The Rheodyne™ 7750E-185 divert/inject valve is a motorized, stainless steel, six-port valve
that switches between two positions: Load and Inject. The divert/inject valve is located on the
front of the TSQ mass spectrometer above the API source. See Figure 7. You can configure
(plumb) the divert/inject valve as a loop injector (for flow injection analysis) or as a divert
valve. See Figure 8. The divert valve enables switching the solvent front, gradient endpoint, or
any portion of the LC run to waste. The TSQ Series Getting Started Guide provides procedures
for plumbing the valve in the loop injector or divert valve configuration.
You can control the divert/inject valve from the data system. You specify the parameters of the
divert/inject valve on the Divert Valve page, accessible from the Instrument Setup window.
For instructions on operating the divert/inject valve from the data system, refer to the Help.
Pusher block
Syringe holder
Syringe
Needle
LC union
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