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Nylon Carrying Case
The Cal 2000 LT comes with a convenient, durable, nylon
carrying case. It is adjustable to be worn as a hip pack, or the
belt strap can be reattached to be worn around the neck or
over the shoulder. The top of the carrying case is clear plas-
tic, allowing the unit to be operated while within the case, and
there is a convenient front pocket for storage of additional
cells or the delivery hose.
Mass Flow Sensor
The Cal 2000 LT has a built-in mass flow sensor that mea-
sures the flow rate of the instrument. This information is
used to control the pump to provide the desired flow-rate.
The flow meter should be calibrated against a primary mass
flow standard every 12 to 24 months.
Internal Charcoal Filter
An internal charcoal filter is provided to scrub contaminated
air and provide a clean baseline for the calibration gas
generated. This filter should be replaced on a yearly basis
and is removed by pulling out the grey plunger at the top of
the unit. Spare filter elements can be purchased through
ACD. Note: The charcoal filter must be fully installed into
the instrument for correct operation.
Page 5
"Cell Failure!"
accompanied by an audible beep.
There are two possible causes for a cell failure. One
cause is that the instrument has not detected a cell. The
other is that a high voltage has been detected across the
cell.
If the cell is not initially detected by the processor, the unit
will display cell failure and immediatly shut down (without
entering 'purge mode'). This failure can happen either
because a cell is not inserted, connection to the cell is not
made, or due to a failure of the circuit board on the generat-
ing cell.
The cell failure alarm will also engage if the microproces-
sor detects an abnormally high cell voltage condition. One
possibility for this high voltage is that one of the pins may
be making a faulty electrical connection. Another possibility
is that the electrolyte level is too low. For instructions on
how to replenish the electrolyte refer to
Section V: Maintenance.
If this message continues after the cell has been plugged
in correctly and the electrolyte level has been confirmed to
be sufficient, contact the factory and/or replace the cell.
"Cell is used up! "
accompanied by an audible beep.
The cell life has expired and the display will show no time
remaining on the cell.
Page 14
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