User Manual
Genevac HT-24
10-1562 Issue 3-7 March
2014
15
SampleGuard™
The SampleGuard transmitter has two input connectors for SampleGuard probes, these
must be connected for the SampleGurard system to function correctly. The numbers
1
and
2
,
embossed on the side of the SampleGuard transmitter, correspond to the
SampleGuard channels shown on the LCD screen. The third connector is for a
stuffer plug
which should not be removed (this is for use by service engineers only).
The channel 1 temperature probe must always be used, it controls the temperature of the
sample holder.
The channel 2 temperature probe monitors the temperature of a sample. Runs that use
Sample Detection
for the automated heat-off or end-of-run options, depend on monitoring
the evaporative cooling effect on samples, therefore these runs require the channel 2
temperature probe to be used. For runs that use
Heat flow
or
timed auto shut down
, the
use of SampleGuard channel 2 is optional.
SampleGuard probes are available in lengths to suit different types of sample holder.
Caution:
Risk to sample integrity; make sure the probes are long enough to allow
the sample holder to swing
channel 1
: insert the probe into the small hole (which is provided for this purpose) in
the sample holder.
channel 2
: insert the probe into one the central sample tubes (or wells) making sure the
probe rests against the bottom of the tube. During evaporation, the probe is held firmly in
place by centrifugal force.
Channel 1 probe
inserted in hole
in sample holder
SampleGuard
transmitter
Channel 2 probe
in central well of
sample holder
Note:
The illustration shows an HT-4X rotor; the same principals apply to HT-8 and HT-12
rotors.
Caution:
Risk to sample integrity; the programmed
SampleGuard Control
Temperature
can only be maintained correctly if the channel 1 SampleGuard
probe is placed in the holder block as shown.
Note:
Significant solvent cooling occurs during evaporation so samples in the central wells
can experience a thermal drain effect due to the greater number of surrounding samples.
Summary of Contents for HT-24
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