Metrohm 824 Easy Sample Changer - Manual (Page 30)

3.3 Manual operation
24
824 Easy Sample Changer, Operation
3.3 Manual operation
When it has been switched on the 824 Easy Sample Changer is in the
normal operating mode. The most important functions for manual op-
eration can be carried out by pressing a key.
3.3.1 Moving the lift
In normal operating
mode
STIR 1 STIR 2
The lift with the titration head can be easily moved up and down with
the <Ï> and <Ð> keys respectively.
Please note that the lift must be located above a valid rack position. If,
because of a possible mechanical influence, the rack is no longer in its
correct position then press the <RESET/STOP> key.
3.3.2 Rotating the sample rack
In normal operating
mode
PUMP 1 PUMP 2
The sample rack can be rotated counterclockwise with the <Í> key
and clockwise with the <Î> key.
For safety reasons the lift must be at or above the set rotating position
when the rack is rotated, so first move the lift upward or press the
<RESET/STOP> key.
3.3.3 Switching the stirrer on/off
2x <SELECT>
STIR 1 STIR 2
After the <SELECT> key has been pressed twice the <STIR 1> and
<STIR 2> keys can be used to switch the stirrers on and off. The
stirring rate of both stirrers can first be set under 'SELECT / Config’, see
below.
LEDs LED 1 and LED 2 show the status of stirrer connections 1 and 2
respectively (LED lit up = on).
3.3.4 Operating the pumps
2x <SELECT>
PUMP 1 PUMP 2
After the <SELECT> key has been pressed twice the pump connec-
tions 1 and 2 (each ±16 V) can be switched on and off with the
<PUMP 1> and <PUMP 2> keys respectively.
LEDs LED 3 and LED 4 show the status of pump connections 1 and 2
respectively (LED lit up = on).