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Condensation Particle Counter


DOS AND DON'TS

DO remember to top up the butanol. This can only be done when the instrument is in Standby mode (see Care and Maintenance).

DO remember to insert an external fuse for safe, correct operation. This should be just a low voltage fuse for the battery within the CPC.

DO remember that it is necessary for the aerosol to be stable for at least 1 minute for an accurate CPC measurement.

DON'T forget to keep the instrument upright whenever possible. If it is kept in the wrong position for long periods of time, the butanol sponge will drip and damage the instrument. The instrument should never be put on its side unless it has been dried out.

DON'T forget to dry out the instrument thoroughly before transport in order to avoid flooding and damaging the instrument. To switch to Dryer mode from Charge mode, press set-up and standby. The Dryer mode runs automatically for approximately 12 hours, after which time the instrument will switch itself off.

DON'T operate the instrument without the condensor reservoir attached or condensation will lead to dilution of the butanol and inaccurate measurements.

DON'T CHANGE ANY SETTINGS IN THE SERVICE MODE UNLESS YOU ARE ABSOLUTELY CERTAIN OF THE OUTCOME.

CARE AND MAINTENANCE

The butanol level should be monitored and topped up when necessary. A green LED at the rear of the device displays the level. To top up the butanol level, attach the external refill bottle and remove the cap. The internal butanol tank should only be filed up when the instrument is in standby mode. If the bottle is attached otherwise then the instrument will take any butanol it requires directly from the bottle, but will not refill the internal tank.

The reservoir for removal of condensation from the condensor walls should always be attached before use and emptied regularly.

The instrument should be kept upright as much as possible. When being transported the CPC should be kept in its carry case which should be pulled along using the handle at the top of the case and NOT the handle on the side.

The instrument should always be dried out before long periods of transportation.

The instrument should never be operated without the attachment of a fuse.

Earth Observation Data Group, Department of Physics, University of Oxford. Page last updated: @21:11 GMT 13-Apr-2014