17
5.4 Back Panel and Belt Clip
The back panel consists of a label with important user information on safety
procedures and certifications, model and serial numbers, etc. and is provided with
mounting hardware for the attachment of the belt clip kit (see Figures 5 or 6 for
mounting configuration of the belt clip).
5.5 Sensing
Chamber
Referring to Figure 1 or 2, the upper mid-section of the
personal
DataRAM contains
the optical sensing chamber. This chamber is the only internal section that the user
should access for maintenance purposes (see Section 12.2).
On the model
p
DR-1000AN, air enters the sensing chamber through the two slot
shaped inlets (one on the front and other on the back) under the protective bumper.
During instrument operation those two openings should remain unobstructed in order
to ensure free access of the surrounding air. When the model
p
DR-1000AN is used
as personal monitor, i.e., clipped to a person’s belt, the rear air inlet opening may be
partially obstructed, but care should be exercised in ensuring that the front air inlet
remains free of any obstructions.
On the model
p
DR-1200, air enters the sensing chamber through the opening in the
cyclone receptacle cup (black cup on right side of sensing chamber), passes through
the photometric stage, and exits through the opening in the filter holder receptacle
cup (black cup on left side of sensing chamber), after which the air passes through
the filter.
6.0
PREPARATION FOR OPERATION
6.1 Battery
Installation
When shipped from the factory, the
personal
DataRAM will arrive without its
replaceable 9V battery installed. Two fresh alkaline batteries (Duracell® type
MN1604) are factory packed separately in the carrying case, one of which should be
installed in the
personal
DataRAM when preparing it for operation.
NOTE: Whenever the
personal
DataRAM is to be left unused for an extended time
(i.e. longer than a month), the 9V battery should be removed from the unit.
Removing the battery will lose neither the program, time/date keeping, nor stored
data.
To install the battery proceed as follows:
•
Hold the
personal
DataRAM upside down.
•
Loosen thumbscrew that secures the battery compartment cover (see Figure 3 or
4), and remove that cover.