BUCHI Wet Digester B-440 - Manual (Page 24)

6 Operation
24 B-440 Operation Manual, Version D
6.3 Setting up application parameters
Internal program storage
The B-440 is capable of storing 9 application methods in its program storage. s
Each program has 5 steps with individual parameter pairs of time and temperature. s
Parameter name Range
Programs 1 – 9
Steps 1 – 5
Temperature ambient – 600 °C
Time (per "STEP") 0 – 240 minutes
Setting up PROGRAMs and STEPs
Switch "ON" the Wet Digester. s
๗After the bootprocess (੠ 4 seconds) the instrument will be operational.
Select a program via the right "SELECT" button (below "PROGRAM" display).
s
Press the left "SELECT" button (below "STEP" display) repeatingly to switch through every s
"TIME" / "TEMP" parameter of each "STEP" in a loop.
๗The "STEP" display shows the selected step (1—5 ).
๗
The corresponding "TIME" / "TEMP" display will flash for 10 seconds and switch to "STEP" level 1
without button action.
To change either the heating time or temperature of a step, use the "UP" and "DOWN" buttons s
while the respective display flashes.
๗As soon as the display stops flashing, the value is being stored.
NOTE
Some application methods do not require a full set of 5 steps. To disable a "STEP", set its "TIME " s
to 0.
During a running application, programming is not possible. s
6.4 How to perform a wet application
Digestion fumes can be hazardous and must be neutralized by a Scrubber or a condensate
trap / Scrubber combination. Fumes which may escape during operation must be safely withdrawn by
a fume hood! Wear personal protective equipment, see section 2.5 for general safety information!
! WARNING
Death or serious poisoning by contact or incorporation of harmful substances and fumes at use.
Before operation, check the instrument for correct assembling s
Rinse condensate trap, hoses and connectors before use s
Before operation inspect sealing surfaces and tubes for good condition and tightness s
Secure all hoses with hose clamps s
Exchange worn out or defective parts immediately s
Only operate the instrument in a fume hood s
Directly withdraw released gases and gaseous substances by a Scrubber s
Dispose of condensate in tubings and glassware safely after use s
Do not inhale digestion fumes s