Metrohm 717 Sample Changer - Manual (Page 16)

3 Sample Racks
717 Sample Changer, Sample Racks 14
3 Sample Racks
A sample rack is a sort of turntable for the positioning of beakers
which are to be placed on the 717 Sample Changer. Because for
titration, various sizes of beakers are common or required, many
kinds of racks can be used and are easily interchangeable. The
rack offers space for various numbers of samples depending on
the diameter of the beakers. Metrohm delivers the following pre-
defined types of standard racks:
*) Parallel titration at two towers possible.
If desired, other user-defined racks can be delivered. Irregular ar-
rangements of beaker positions are also possible.
Every single rack can be identified by a unique magnetic code.
Rod magnets which are attached to the bottom of the rack can be
combined to form a 6-place binary code. The sample changer can
then automatically recognize the mounted rack. This is possible
when the rack is positioned with the first rack position in front of
tower 1. When changing a rack, the sample changer should first
be reset to the normal position. This way the save recognition of a
rack and therefore the correct beaker positioning is made possi-
ble. An internal position table containing the unambiguous defini-
tion of the turning angles and beaker positions is assigned to each
rack type.
This position table is stored in the control device.
Type Number of
beakers Type of beaker Predef.
Code Order
Number
M12-0 12 *) 250 mL Metrohm glass beaker 000001 6.2041.310
M12-0 12 *) 150 mL glass beaker or
200 mL disposable beaker (Euro) 100000 6.2041.360
M14-0 14 200 mL disposable beaker (Euro) 000011 6.2041.370
M14-0 14 8 oz disposable beaker PP (US) 000101 6.2041.380
M16-0 16 150 mL glass beaker 000010 6.2041.320
M16-0 16 120 mL disposable beaker (US) 100001 6.2041.390
M24-0 24 *) 75 mL Metrohm glass beaker 001000 6.2041.340
M48-1 48 75 mL Metrohm glass beaker 010000 6.2041.350
M128-2 126
2 15 mL test tubes
250 mL Metrohm glass beaker 001010 6.2041.400