Technical data

37
“BASE” Kit
The “BASE” Offline Kit represents the basic
USP/EP compliant ERWEKA offline system
where the stainless steel (316) sample with-
draw tubes are driven into the media, to the
exact USP/EP sampling height, only while the
sample is withdrawn – not to change the hydro-
dynamics constantly.
Similar to the “BUDGET” version also this ver-
sion allows collecting into glass tubes of 10 ml
or 25ml and media replacement is available as
an option. 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 and RS 232 interface for ex-
ternal control
3.) FRL 720 7-channel “silent” Autosampler
with x/y driven arm in “corrosion reduced
design” for collection of up to 25 sampling
intervals into 10 ml glass tubes or 17 sam-
pling 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 (for glass tubes only).
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while the sample is withdrawn – not to change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.
The connected pump (8-channel peristaltic
pump) transfers the sample to collect from the
vessel into glass tubes (10ml or 25 ml maxi-
mum capacity) positioned in the rack at the
Autosampler.
For more precise dosing – after collection – the
x/y driven arm moves down to a selected sam-
ple volume level and pumps back the sample
above this level to the dissolution vessel (over-
filling/levelling principle).
To minimize cross-contamination between of
the media of various sampling intervals there’s
an automated tube cleaning routine between
the sampling intervals.
“BASE” Offline Kit, 7-channel
15-117-0000
(storage/doses into tubes only)