Metrohm 717 Sample Changer - Manual (Page 18)

4.1 Prerequisites
717 Sample Changer, Swing Head 16
4 Swing Head
To ensure that the individual vessels are approached with preci-
sion even when using multiple-row sample racks, a 759 Swing
Head can be installed instead of the normal titration head. The
swing head is fitted with either a titration head (2.759.0020) or a
transfer head (2.759.0010) for pipetting the sample from the sam-
ple vessel into a bigger titrating vessel.
4.1 Prerequisites
The 759 Swing Head can be used in combination with the follow-
ing racks:
Sample rack 759 model Number of
towers
Titration 48 x 75 mL for direct titration
Article No. 6.2041.350 Article No.
2.759.0020 1, 2
Pipetting 126 x 15 mL and
2 x 150 mL for pipetting
Article No. 6.2041.400 Article No.
2.759.0010 2
If the two-row sample rack with 48 beakers is used on the 2-tower
model for direct titration, sample beakers cannot be approached
with tower 2. If the rack is used for transferring samples from 126
test tubes into two central measuring/rinsing vessels (special
beakers), all the positions can be approached with tower 1,
whereas tower 2 can only approach the two special beakers.
The swing head cannot be used in combination with other stan-
dard rack types.
4.2 Installing the Swing Head
The best procedure for installing the swing head is described be-
low. The swing head will normally be installed by our service per-
sonnel.
If a 2-tower sample changer is used, the swing head must al-
ways be connected to tower 1 (see page 4)!
With 2-tower sample changers, tower 1 is first moved into a cen-
tral lift position and tower 2 is moved into the rest position.
Turn off all mains power switches.
Install the new titration head (6.1462.020) or transfer head
(6.1462.010) on the underside of the swing head.