Metrohm 2.850.2230, Manual, Page: 54 / 150

3.12 High pressure pump
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44
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850 Professional IC–Anion – MSM-HC – MCS – LP Gradient
1
2
3
Figure 22 Mixing coil for low pressure gradients connection
1 Inlet valve holder 2 PEEK pressure screw, short 6.2744.070
3 Mixing coil for low pressure gradients
6.2758.020
3.12.3 Deaerating the high pressure pump
The high pressure pump will only operate perfectly if the pump head con-
tains no more air bubbles. Therefore it must be deaerated during initial
start-up and after every change of eluent.
CAUTION
The high pressure pump must not be deaerated before the initial start-
up (see Chapter 4.1, page 74) .
Deaerate the high pressure pump as follows (see Figure 23, page 45) :
Deaerating the high pressure pump
The instrument must be connected to the PC and switched on to deaerate
the high pressure pump.