Owner's manual

OPERATION
A. Start up
To start measuring particle concentrations turn power switch to “on” and allow unit
to warm-up for a few minutes. Set range switch to “0-20mg/m
3
” position.
B. Battery Status and Charging.
The Haz-Dust HD-1100 is powered by NiMH batteries, which have a variable
lifetime that can range from 500-1000 hours. The batteries need to be replaced
when they do not hold a charge for 8 hours. To check to see if batteries need
charging depress “Bat” on power switch and observe reading on display. Reading
should be greater than 6.0 when range switch is in the high position to use
equipment.
NOTE: Be sure to set the switch to the “off” position when you are finished
checking the battery status batteries will discharge.
When charging batteries leave charger connected for 10-12 hours with unit “off”.
NOTE: Unit should not be connected to charger when off for more than 12 hours.
C. ZEROING
For this procedure it is very important to perform the zero adjustment in a clean
environment with respect to the environment being monitored. It is recommended
to purchase the optional accessory ZA-111 is available for zeroing monitor.
To zero the unit, turn the zero adjustment screw with the provided trim stick, so
that the display reads 0.00+/-0.02mg/m³. This process requires patience. It is
recommended to turn the zero adjustment in very small increments and wait for
one minute for readings to stabilize.
After the unit has been zeroed, the range switch can be set to the “0-200mg/m
3
”
position. Now you are ready to start monitoring for airborne particulates.
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