Operation
Maintenance
18
19
Operation
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Switch on colony counter by operating the mains switch.
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Put Petri dish in counting plate (possibly with reducer).
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Press Reset key (display is set to zero).
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Mark each colony with a felt tip pen (each marking is confirmed by an acoustic
signal).
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Note final result.
•
Remove counted Petri dish and insert next Petri dish.
•
Press Reset key.
•
Perform next counting.
•
After having finished working switch off colony counter.
Note:
With power failure the indication remains stored for approx. 3 seconds.
The indication in the display, however, is increased by 1.
The colony counter BZG 30 does not need a special maintenance except an
occasional cleaning and possibly a replacement of the ring lamp.
Cleaning
Clean the colony counter occasionally with a moist cloth (do not use solvents).
Aseptic cleaning
Alcohol may be used for aseptic cleaning.
Replacement of the ring lamp
Before opening the instrument disconnect mains plug!
Opening of the instrument
•
Disconnect mains plug.
•
Remove magnifying glass.
•
With a screw driver remove the 2 cheese head screws (upper housing part).
•
Remove upper part from lower part and lay aside.
Replacement of the ring lamp
•
Disconnect the 2 white (clip 4, 3) and 2 black (clip 1, 2) cable connections at the
electronic choke. For this press orange keys at the corresponding clips and pull
cable out of the clips.
•
Loosen the clamps off the ring lamp by slightly moving them.
•
Carefully lift ring lamp out of the clamps.
•
Assembly of the ring lamp in reversed sequence.
Closing of the instrument
•
Place upper part on lower part and tighten both fixing screws.
•
Assemble magnifying glass.
•
Connect mains plug.
•
Check instrument for perfect function!
