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Troubleshooting
The MicroBio should give many years of trouble-free service with minimal routine maintenance.
However, below are some common questions and answers relating to the use of the MicroBio MB1
and MB2 Air Sampler.
Q. The unit will not switch on.
A. Check the batteries are inserted correctly and fully charged. If this does not resolve the
situation, please contact the manufacturer.
Q. (MB1 Only) When setting the volume to be sampled and then pressing start, the fan
seems to run slow and the display dims.
A. This may well be due to exhausted batteries, or use of low quality batteries not supplied by
the manufacturer. Some AA cells have a higher internal resistance than others, particularly
budget alkaline cells. When the fan starts in the instrument there is a high surge current that will
cause the voltage of the batteries to momentarily dip causing the fan to run slow. Try using a
new set of high quality alkaline or freshly charged NiMh cells. The brands of alkaline cells we
have found to work well are Duracell, Energizer and Varta.
Q. The sampler cuts out and switches off during sampling.
A. This is due to exhausted or low quality batteries. Replace batteries or recharge.
Q. The sampling head fits loosely.
A. There is a retaining spring inside the sampling head area that keeps the head tight. This may,
with time and use, have moved. Loosen the screw, slide the spring to the edge of the sampling
head plate and re- tighten. Try this until a secure fit is obtained.
Q. The contact plate or Petri dish fit loosely.
A. With time the springs that hold them in place may have loosened. Undo the screws, move the
springs and re-tighten until a secure hold of the plate/dish is obtained. There is variation in the
outside diameter of plates from one manufacturer to another. The MicroBio holding springs can
be adjusted to accommodate this variation.
MB2 Only
Q. Unable to adjust properly user pre-set sample volumes or sample volume and samples
records appear to be corrupted.
A. This is a rare event that may possibly happen if the unit is switched off during sampling or just
as sampling completes. The unit should never be switched off until the user acknowledges
the end of sampling or cancels sampling using the keypad. If this does occur, select
STATUS" from the menu, press START, then hold down the
until the display indicates the unit is "RESETTING". The MB2 will re-boot to factory default
values and clear any problems.
Technical Support
The first point of call for technical support should be your local distributor. If you do not have a
distributor in your country, please visit our website at http://cantiumscientific.com/Distributors.html.
June 2012
MicroBio Operating Manual [P0001W006]
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