Technical data

43
“FAST” Kit
The dosing-by-valves “FAST” Kit offers best
possible dosing results in combination with the
easy-to-use, budget 8-channel peristaltic pump
in combination with short sampling intervals
(from 2 minutes).
The system allows precision sample dosing into
glass tubes (10 ml/25 ml) or sealed/unsealed
HPLC vials (1.5 ml/4.0 ml), accurate media
replacement as well as HPLC membrane pierc-
ing. The system comprises of:
1.) Fully USP/EP compliant sampling station
with automatic sample withdraw height ad-
justment and 7 stainless steel (316) sam-
ple withdraw tubes
2.) 8-channel peristaltic pump with Verder-
prene tubing
3.) FRL 724 7-channel “silent” Autosampler
with 7x 3-way-valves and x/y driven arm in
“corrosion reduced design” for collection of
up to 25 sampling intervals into 10 ml glass
tubes, sealed 1.2/4.0 ml HPLC vials or 17
sampling intervals into 25 ml glass tubes
as well as support arm to hold a rack.
4.) Tubing/Connector Kit, Teflon
5.) System pre-configuration
6.) Upgraded micro-controller for DT 820 se-
ries to control the complete Offline System
Not included: DT 820 dissolution tester and
collection rack
Operation principle:
The stainless steel (optional Titanium) sample
withdraw tubes are driven into the media (ex-
actly midway between the top of the media and
the top of the rotating Basket or Paddle) only
while the sample is withdrawn – not to change
the hydrodynamic inside the vessel – as de-
scribed in the USP and EP.
Optional the sample withdraw system can be
equipped with electronic temperature sensors
for each vessel to archive media temperature
documentation for each test-station.
During the sample withdraw tubes are inside
the media the peristaltic pump pumps the me-
dia in a cycle from the vessel through the Auto-
sampler back to the vessel until all air inside the
tubing system is removed and the filters are
saturated.
Then the 3-way solenoid valves inside the arm
of the FRL 724 Autosampler switch and the
required amount of media is collected in either
glass tubes (10/25 ml) or sealed/unsealed
HPLC vials (1.5/4.0 ml) with an accuracy of ±
0.5 ml.
Optionally cooled racks for HPLC vials are
available.
After sample collection the 316 stainless steel
tubes (optionally Titanium) of the Autosampler
drive to and into the replacement media inside
the acrylic glass reservoir which refills after
each media replacement interval automatically
by two integrated 1-channel peristaltic pumps.
The 8-channel peristaltic pump will transfer the
desired volume to the test-stations (vessels) to
keep the media volume within the USP/EP
specified ± 1% limits.
“FAST” Offline Kit, 7-channel
15-157-0000
(storage/doses into tubes & HPLC vials, media replacement and HPLC vial mem-
brane piercing)