BUCHI Extraction System B-811 LSV - Manual (Page 39)

6 Operation
39 B-811 Operation Manual, Version G
Function key Display Description
Display H: MIN blinks Select the extraction time (0 - 99:99 h) using the / keys
In the Hot Extraction Mode the only stop criterion used is
the extraction time. When the extraction time has expired the
program switches to the next step
Display STEP 2 blinks (STEP 2 = Rinsing)
Display HEATING
blinks
Select the heating level (1 - 20) using the / keys
Select level 13 for toluene
In case of oxygen-sensitive analytes, the gas supply must be
activated by pressing the INERT GAS key
The inert gas valve is automatically opened up while the step
starts
Display H: MIN blinks Select the rinse time (0 to 99:99 h) using the / keys
Display STEP 3 blinks (STEP 3 = Drying)
Display HEATING
blinks
Select the heating level (1 - 20) using the / keys
Select level 4 for toluene
Display H: MIN blinks Select the drying time (0 to 99:99 h) using the / keys
In case of oxygen-sensitive analytes, the gas supply must be
activated by pressing the INERT GAS key
The inert gas valve is automatically opened up while the step
starts
SELECT No display blinks The entered program is stored as program 0.
To store this program under a different program number, please
see chapter 6.7
6 .6 Continuous Mode - programming example
Program description:
In the continuous mode, known as Twisselmann Extraction, the magnetic valve is opened during the
entire extraction step.
The sample is always extracted with fresh solvent. Solvent: petroleum ether 40/60, for other heating
levels see chapter 5.12.
Function key Display Description
SELECT The Mode display
blinks
Select the Continuous Mode using the / keys
Display STEP 1 blinks (STEP 1 = Extraction)
Display HEATING
blinks
Select the heating level (1 - 20) using the / keys
Select level 9 for petroleum ether 40/60
Display H: MIN blinks Select the extraction time (0 - 99:99 h) using the / keys
The only stop criterion used for STEP 1 is the extraction time
Display STEP 2 blinks (STEP 2 = Rinsing)