CEL-712 Microdust Pro Real-time Dust Monitor
14 Casella Measurement
Fitting the batteries
You do not need any special tools to fit new batteries to the instrument.
1. If necessary, press and hold the ON/OFF key to switch the instrument
OFF.
2. Remove the three exhausted batteries from the battery compartment.
3. Fit fully-charged batteries into the battery compartment, observing the
polarity markings.
4. Press and release the ON/OFF key, and check the battery symbol shows
the batteries have a full charge level.
Mains DC supply
The use of an external 12 VDC mains power supply enables the instrument to
operate for extended measurement time periods.
The instrument will automatically switch ON whenever an external 12 VDC
supply is connected.
The instrument DOES NOT include a mains DC supply as standard. Please use
the optional Casella power supply (part number -PC18).
NOTE
The Microdust Pro instrument disconnects the internal batteries whenever a mains
DC or USB power supply is applied. The batteries do not recharge when you operate
the instrument from a DC supply.
If you use rechargeable batteries with the Microdust Pro instrument, you must use an
external battery charger of the correct type to charge the batteries. Follow the
charging instructions supplied by the battery manufacturer to charge the batteries.
USB supply
When you connect the instrument to a PC through a USB cable, the instrument
receives power to operate at 5 V DC from the PC. There is no need to use a
mains DC power supply to operate the Microdust Pro instrument when you
connect it to a PC USB port.
Battery condition indicator
When the Microdust Pro instrument receives power from a mains DC power
supply or from a USB port on a PC, the battery condition symbol on the
instrument’s screen always shows a fully charged battery condition, even if the
batteries are not fully charged.
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