thermo spectronic Helios Gamma Benutzerhandbuch Seite 53

AIR GAP
Sets the gap between the trailing meniscus of the current
sample and the leading meniscus of the next sample. The gap
is measured to the nearest centimetre.
For best results set the airgap no less than 8cm from the flowcell.
SAMPLE VOL
Sets the volume of sample to be pumped.
SAMPLE
LOW VOL
FUNCTION KEYS
VIEW CALIB Goes to the SIPPER CALIBRATION page.
CALIBRATE Starts the Sipper calibration procedure.
Sipper Calibration
This calibrates the MiniSipper to take account of variations in pump and uptake
tubing and sample viscosities. A volume is set and several sips are performed
using the appropriate solvent. The actual volume sipped is entered and a
calculation done to produce a calibration factor. This factor is then used to
adjust the pumping time to ensure that the correct volume of sample is always
used.
Details of the calibration used are displayed on the SIPPER CALIBRATION page.
CALIBRATE SIPPER Page
* CALIBRATE
NOMINAL VOL.
NO. SIPS DONE
The sipper will pump a sample and the spectrophotometer will issue a beep.
Withdraw the measuring cylinder and the sipper will pump the air gap. The values
used for sample volume and air gap are those set on the SIPPER page.
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MINISIPPER
: Enter value between 0 and 500 cm.
: Enter a value between 0.5 and 9.999 ml.
: Set to WASTE.
After measurement the sample is pumped through the flowcell
to waste by the act of pumping the next sample.
: Set to OFF.
A standard internal diameter (4.0mm) uptake tube is used.
SIPPER *
: 1.000 ml
: 5
English
Using the solvent which will be used for
the sample solutions, offer a measuring
cylinder filled to the highest gradation
to the sipper uptake tube and press the
switch.
GD Issue 1 (08/2000)