MSA MultiGard 5000 - Page 15

7
3103-1001 Rev. 0
1.3 Terminology
The following terminology is used throughout this manual. Read and become familiar with the
definitions.
ACTUAL DWELL TIME - The actual time sample is being drawn from a specific sample line and
applied to the sensor(s)/analyzer(s). This value is a function of the dwell time parameters.
ALARM - The indication that a preset alarm level has been exceeded.
ALARMING - The indication of a WARNING, ALARM, or TROUBLE by the MultiGard 5000
unit.
ANALYSIS TIME – the amount of time that a gas sample from the sample location is run past the
sensors independent of any associated transport times. This time is dictated by the slowest
responding sensor on the common sample path.
BYPASS EXHAUST - In this look-ahead system, the bypass gas volume is drawn from the next
area to be sampled and vented.
BYPASS (VALVE, MANIFOLD, PUMP HEAD, FLOW SWITCH) - The plumbing required to
draw on the next point to be sampled.
CALIBRATION - The process of zeroing and spanning a sensor/analyzer.
COALESCER - A filter designed to eliminate condensate from the sample stream.
CONDITION ACKNOWLEDGE - Eliminating a Latched alarming condition indicated by the
MultiGard 5000 unit by depressing the “Condition Acknowledge” button on the Overview screen
after the condition has cleared.
CORRELATION FACTOR - A sensor’s response to a synthetic span-gas in units of sensor reading
per concentration of synthetic span gas.
DEFAULTS FORCED - A condition resulting from the loss of the program memory requiring a
back-up from flash memory. In this state, the MultiGard 5000 unit reverts to functioning as
configured by MSA and all user modifications are nullified.
DRAIN - The volume of sample gas that continuously bypasses the sensor(s) to eliminate
condensate from the sample stream.
DWELL TIME PARAMETERS - The parameters that are used to determine the actual dwell time
of the system on a sample line; analysis time, extended analysis time, sample transport time and
internal transport time.
END OF LINE FILTER - A filter used at the sample entry point to eliminate particulates from the
sample stream.