Metrohm 844 UV/VIS Compact IC - Manual (Page 44)

Table of contents
3 Mount CO
2
absorber tube
• First place a piece of cotton wool 89 followed by CO
2
absorber 88 (e.g. Merck soda lime pellets with indicator, no.
6839.1000) in the large opening of absorber tube 91 and then
close it with the plastic lid.
• Fasten absorber tube 91 to bottle attachment 85 with the aid
of SGJ clip 90.
4 Connect aspirating tubing to pump
• Lead the free end of aspirating tubing 82. through opening 2
into the inner compartment of the 844 UV/VIS Compact IC.
• Pull aspirating tubing 82 sufficiently far into the interior of the
844 UV/VIS Compact IC, cut off to the required length and
push at least 5 mm of it onto aspirating capillary 30 of the
high-pressure pump (it may be necessary to use emery
paper).
• If necessary, fix aspirating tubing 82 in the required position
in the interior with the aid of the Y.107.0150 self-adhesive
strap.
Figure 16: Connection of eluent bottle
2.6.4 Deaerating the pump and rinsing the pulsation dampener
The first time that it is started up the high-pressure pump must be de-
aerated. Proceed as follows:
1 Prepare for deaeration
• Open the rotary knob on purge valve 32 by approx. ½ turn in
the counterclockwise direction.
• Remove the plastic stopper from connection 6 on the front
panel of 844 UV/VIS Compact IC.
• Push 6.2816.020 Syringe (without needle) into connection 6
until the stop is reached.
82 Aspirating tubing (6.1834.010)
83 Tubing nipple (4.420.4300; M8)
with E.301.0021 O-ring
84 Threaded stopper (6.1446.040; M6)
85 Bottle attachment (6.1602.105)
86 Eluent bottle (6.1608.070)
87 Aspirating filter (6.2821.090)
88 CO2 absorber
89 Cotton wool
90 SGJ clip (6.2023.020)
91 Absorber tube (6.1609.000)
87
91
90
89
88
82
83
84
85
86