BUCHI Inert Loop B-295 - Manual (Page 53)

6 Operation
53 B-290 Operation Manual, Version I
6 .7 Operation with the Inert Loop B-295
! Danger
Death or serious poisoning by gases or particles due to O
2
– sensor or filter malfunction
• Exchange defective O
2
– sensor immediately
• Exchange O
2
– sensor regularly within the specified maintenance intervals
• Exchange clogged filters immediately
• Exchange filters regularly within the specified maintenance intervals
• Dispose of filter immediately
! Danger
Death by suffocation or serious poisoning by inhalation of inert gases.
• Do not inhale inert gases
• Directly withdraw released gases and gaseous substances by sufficient ventilation
• Only operate the instrument in ventilated environments
• Before operation, check all parts, connections and sealings involved in the gasflow for proper
sealing
• Exchange worn out or defective parts immediately
a Switch on
b Switch off
c Temperature up
d Temperature down
e Display
f Signal lamp oxygen
g Signal lamp pressure
h Signal lamp operation
i Signal lamp power
Fig. 6.6: Display of the Inert Loop B-295
To operate the instruments, proceed as follows:
1. Switch on the Mini Spray Dryer B-290 Advanced. The instrument automatically detects the
connected periphery. Both signal lamps f and g at the Inert Loop B-295 are lit on. If the
oxygen signal lamp f is off, there might still be enough inert gas in the loop. In this case, open
one tube connection wherever possible and let the aspirator run for 2 minutes, as ambient
oxygen concentration is required to check the oxygen sensor prior to each process. The Inert
Loop B-295 starts immediately to cool down to the set temperature. If the instrument should not
yet cool please press the button a, if the instrument should be started again, press button b.