Technical data

31
2. Autosampler
2.1. Autosampler, FRL 720
Valve-free Autosampler for 7-, 8 or 14
channel operation
The 7-channel FRL 720 with x/y-driven sam-
pling arm was designed for silent operation and
maximum corrosion resistance.
To archive that the unit is mainly made from
corrosion free materials such as alloy and plas-
tics and features a gentle and precise spindle
drive.
The alloy rack-holder is made to carry various
racks (glass tubes of 10 ml and 25 ml capacity
as well as HPLC vials of 1.5 ml and 4.0 ml
maximum volume) to store max. 25 sampling
intervals of 8 vessels or 12 sampling intervals of
14 test stations (FRL 720-2 version to operate
with DT 1420). For temperature sensitive sam-
ples a cooled rack for HPLC vials is available.
HPLC membrane piercing is realised by using a
2
nd
spindle drive of the y-axis of the sampling
arm. The high-torque gear allows piercing of
either split- or even none-split septum.
The medium replacement (if equipped) is per-
formed by a 2-part container of which the re-
placement media section is constantly refilled
by two 1-channel peristaltic pumps from an
external heated or unheated flask. This feature
permits a) nearly unlimited amount of replace-
ment media and b) sucking from a heated con-
tainer not to lower the media temperature inside
the test station by cold replacement media.
In standard configuration the 7 filling-tubes are
made of 316 stainless steel but also are avail-
able from Titanium to eliminate any possibility
of corrosion even inside the tubes.
For 8-channel operation the FRL 820, for 14-
channel operation the FRL 720-2 are available.
In combination with an ERWEKA SP syringe
pump and an optional 3-part container (instead
standard 2-part) the Autosampler 720 allows
dilution of the collected samples with an accu-
racy of ± 0.1 ml. Therefore, in combination with
10 ml or 25 ml glass tubes, a 1:1, 1:2, 1:5 or
even 1:10 dilution can be obtained.
While in combination with a syringe pump the
precise dosing of the collected sample is ar-
chived by the syringe, at the “BUDGET” and
“BASE” Offline Systems (peristaltic pump) the
FRL 720 is responsible for the dosing accuracy
itself: the glass tubes are overfilled with media –
then the stainless steel filling tubes move down
to the height level of the desired sample
amount and returns the sample above this level
back to the vessel inside the dissolution tester.
15-207-1000
 Additional price 8-channel version, FRL 820
15-208-1000
 Additional price 14-channel version,
FRL 720-2 15-214-1000
 Additional price media replacement (incl. two
1-channel peristaltic pumps, 2-part acrylic
glass container and replacement routine) 15-2xx-x1xx
 Additional price media replacement and
automated dilution (incl. two 1-channel peri-
staltic pumps, 3-part acrylic glass container
and replacement-/dilution routine)
15-2x7-x2xx
 Additional price for Titanium filling tubes
(instead 316 stainless steel); for FRL 720
15-207-xx1x
 Additional price for Titanium filling tubes
(instead 316 stainless steel); for FRL 820
15-208-xx1x
 Additional price for Titanium filling tubes
(instead 316 stainless steel); for FRL 720-2
15-214-xx1x