3 the pump, The pump, Fig. 13 – Metrohm 832 KF Thermoprep User Manual

Page 18: Needle in lowered position

4.3 The pump

832 KF Thermoprep, Operation

Loosen the red clamping lever by pressing it strongly and lower the
guide head and needle by using both hands. Penetrate the vial septum
with the needle and lower the guide head until it reaches the bottom
stop.

Fig. 13 Needle in lowered position

4.3 The pump

The 832 KF Thermoprep is equipped with a powerful air pump, with
which the released humidity of the sample can be transferred to a titra-

tion cell in a constant carrier gas stream.

Atach a 6.2724.010 dust filter to the air inlet 30 on the instrument's rear
side. Avoid the intrusion of dust particles.
The dust filter must be replaced in a regular equipment service.

If thermal unstable samples, which may decompose at higher tempera-
tures are treated, the use of nitrogen as carrier gas is highly recom-
mended. Connect the nitrogen supply pipe to the hose olive of the dust

filter. The maximum pressure of the nitrogen supply must not exceed

1 bar.