Casella CEL Microdust Pro real time dust monitor - Manual (Page 14)

MicroDust Pro Aerosol Monitoring System
14 Casella CEL
You should also carry a spare set of batteries.
How to fit new batteries
Before you begin:
Read the caution notice about Batteries on page 6.
You should fit new or fully-charged batteries into the instrument before you
start a set of measurement.
Fitting the batteries
If necessary, press the power ON/OFF key to switch the instrument OFF.
Figure 5. Fitting new batteries
1. Lift and slide the battery cover towards the bottom of the instrument
and lift the end to release the cover.
2. Remove the four exhausted batteries from the battery compartment and
fit new ones, observing the correct polarity.
3. Press the power ON/OFF key, and check the battery symbol shows the
batteries have a good charge.
Mains DC supply
If you need to operate the instrument for a long period, you should operate the
instrument from a Casella -PC18 DC power supply if possible. This avoids the
run being interrupted by battery failure. When you use a DC power supply to
operate the MicroDust Pro, the instrument can operate without batteries
installed.