Thermo Scientific thermoscientific Vanquish Pumps C, Operating Manual

Page: 71 / 296

5 • Installation
Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual Page 71
5.7 Seal Wash System
The flow path of the seal wash system passes through the metering
device head in the autosampler and the pump heads in the pump. The
seal wash system comprises the following parts:
• In the pump: Seal wash pump (peristaltic pump), seal wash lines,
and seal wash detector (drop detector)
• In the autosampler: Seal wash lines
• Reservoir for the seal wash liquid
Both, the autosampler and pump are shipped with the seal wash
components installed and the lines connected within each of the two
modules.
To complete the setup, interconnect the seal wash paths of the
modules, connect and fill the seal wash reservoir, and flush the seal
wash system (see
Setting Up the Seal Wash System (
}
page 72) ).
NOTICE
If you want to use normal-phase compatible solvents and additives in a
Vanquish Core system, you must modify the VC-pump and VC-
autosampler with the components from the Normal-Phase (NP) kit. See
Normal-Phase Compatible Solvents and Additives ( } page 249) .
5.7.1 Choosing the Seal Wash Liquid
Use seal wash liquid that fulfills the following requirements:
• The seal wash liquid is miscible with the solvent that is used in the
pump.
• The seal wash liquid is compatible with the seal wash tubing.
• The seal wash liquid provides certain conductivity for reliable
performance of the seal wash detector.
¨
HPLC-grade water with 10% methanol is an appropriate choice.
¨
With a Vanquish Core system that has been modified for using
normal-phase compatible solvents and additives, observe the
information in
Normal-Phase Compatible Solvents and Additives
(
}
page 249) .