Casella CEL Software for the Microdust dust monitor - Manual (Page 14)

Rechargeable batteries may be supplied by Casella CEL in a discharged state.
In order to obtain maximum capacity from new NiCd batteries, several charge
and discharge cycles may be required.
Serial Number Label
Boot Mode
Normally
Disabled
Charger
Enable
Factory
Settings
00014
ON 1
2
Figure 11: Location of DIP switches
Warning !
DO NOT enable the charger circuit while non-rechargeable
batteries are installed.
The instrument has a built in
fast-charging circuit that uses
power applied via the 12 V DC
socket shown in Figure 8. This
allows rechargeable batteries to
be recharged in-situ. When
rechargeable batteries are to be
charged in situ, set the Charger
Enable DIP switch to ON as
shown in Figure 11.
Charging will terminate automatically once the batteries are fully charged,
which takes approxi- mately 3 hours for fully discharged batteries.
2.1.2 Sampling Probe*
The detachable probe houses the measurement chamber together with the
associated optics, infra red emitter and receiver. Connect the probe by
inserting the cable connector into the socket in the top end of the instrument
case, with the red dot facing the front of the instrument to ensure correct pin
location.
DO NOT pull on the cable to disconnect the probe.
Disconnect the probe and cable from the instrument ONLY by pulling out-
wards on the knurled sleeve, in the direction of the arrows shown in Figure 4.
The probe may be un-clipped from the control unit for hand held operation.
2.1.3 Supporting the Instrument
For general monitoring applications the instrument may be fitted to a suitable
tripod (available from Casella CEL).
Note*: Reading errors may be observed when using the instrument in very bright
or changing ambient light conditions because the measurement method
depends on the scattering of infra-red light. Therefore, exercise care when
using in direct sunlight. Shield the probe from direct light sources and hold
it steady while taking a reading. An aspirated or PUFF adaptor may be used
to minimise light ingress.
Page 14 of 60
Operation MICRODUST pro Aerosol Monitoring System &
WINDUST pro Application Software - Handbook