3
GASCOSEEKER 2-500 USER HANDBOOK
Operation
A sample of the atmosphere to be measured is drawn
through the instrument by means of a pump via a filter into
the analysing chamber. The analysing chamber contains
the detection elements which monitor the gas.
Range selection is automatic.
The total system is controlled by a microprocessor which
maintains the necessary voltage conditions on the sensing
elements, controls the pump and range selection and
displays the result on a solid state analogue and digital
display.
The microprocessor carries out some housekeeping and
status management functions for the instrument and the
instrument status is also shown on the display as is the
range selected. The display is back illuminated when used
in low ambient light conditions.
The total instrument is housed in a tough impact resistant
moulded case and is powered by size D LR20 alkaline
cells to give up to 15 hours continuous operation.