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SAMPLE TRANSPORT TIME - The duration of time required to deliver a fresh sample from the
sample entry point to the MultiGard 5000 unit.
SENSOR/ANALYZER - A device that generates an electrical signal proportional to the
concentration of the specific gas it was calibrated to detect.
SPAN - Full-scale or up-scale reading on the meter display.
SPAN DRIFT - The deviation of sensor output from actual gas concentration applied.
SPAN GAS VALUE - The gas concentration that gives the instrument a full-scale or up-scale value.
This value is printed on the cylinder containing the calibration gas.
SPANNING - The process of applying span gas to a sensor/analyzer and placing a full-scale or span
gas indication on the unit during calibration.
STANDARDIZATION - The process of compensating for zero-drift and/or span-drift without re-
calibrating the sensor.
STANDARDIZATION HIGH TOLERANCE - The amount of correction to sensor output (in
sensor engineering units) that will result in a trouble condition indication by the MultiGard 5000 unit
and a disabling of the alarm functions.
STANDARDIZATION LOW TOLERANCE - The amount of correction to sensor output (in
sensor engineering units) that will result in a trouble condition indication by the MultiGard 5000 unit
while continuing to operate.
SYNTHETIC SPAN GAS - A gas that causes an up-scale reading used in place of the original span
gas for which the sensor/analyzer was calibrated.
TROUBLE - The indication that a fault condition has occurred.
USER CONFIGURED OUTPUT (UCO) - An output in the form of a solid state output or form C
relay contacts whose functionality may be defined by the end user.
WARNING - The indication that a preset warning level has been exceeded.
ZERO - A zero (0) indication on the meter display usually indicates fresh air (no gas present).
ZERO DRIFT - The deviation of sensor output when zero gas is applied.
ZEROING - The process of applying zero gas to a sensor/analyzer and placing a zero gas indication
on the unit during calibration.
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