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Delivery Hose
The instrument comes standard with a three (3) foot long, ¼ inch diameter
norprene hose for delivering the gas to the sensor or calibration adapter.
The hose has a male quick connect adapter for easy attachment to the
instrument.
Mass Flow Sensor
The Cal 2000 has a built-in mass flow sensor that measures the flow rate
of the instrument. This information is used in two ways. With the pump
engaged, it is used to control the pump to the desired flow rate over a range
of 0.2 to 1.0 LPM. With the pump disabled, it is used to measure the air flow
rate drawn through the Cal 2000 by an external pump. This information is
used to adjust the cell current to the desired ppm. 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 “zeroing” sensors. 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.
