Thermo Scientific MIRAN 205B Series Instruction Manual page 83

Gas STEL Time Interval
The Gas STEL Time Interval is the interval for the STEL alarm for the application. The
last interval configured is shown on the display. If this is the interval for the present
application, press
ENTER
Press to change the interval. The STEL Time Interval Selection Display appears. Select
1
the interval for the application (Off, 5, 10, or 15 minutes). The display responds
"-ACCEPTED-" and then changes to the next parameter to be configured.
Gas Molecular Weight
Gas Molecular Weight sets the molecular weight of the gas for the application. The last
weight configured is shown on the display. If this is the weight for the present
application, press
ENTER
Press to change the weight. The Molecular Weight Enter Display appears. Key in the
1
desired weight (000.0 to 999.9) and press
responds "-ACCEPTED-" and then changes to the next parameter to be configured. This
value converts concentrations unit of measure to mg/m
Gas Liquid Density
Gas Liquid Density sets the density of the vapor for the application. The last density
configured is shown on the display. If this is the density for the present application, press
. The display changes to the next parameter to be configured. Press
ENTER
the density. The Density Enter Display appears. Key in the desired density (0.00 to 9.99)
and press . If the entry is valid, the display responds "-ACCEPTED-" and then
ENTER
changes to the next parameter to be configured. This value is for reference only, and is
not used in any calculation.
Gas TWA Weighting
Gas TWA Weighting specifies the gas group TWA weighting of the gas for a multi-gas
application. The last weight configured is shown on the display. If this is the weight of
the present application, press
configured. Press to change the weight. The TWA Weight Enter Display appears. Key
1
in the desired weight (from 0 to 10000) and press
display responds "-ACCEPTED-." If this is not the last gas in the application, the display
returns to Gas Summary for the next gas. If this is the last gas in the application, the
display changes to the next parameter to be configured, Wave Count.
The group TWA is calculated by dividing the instantaneous concentration for each gas by
their respective GTWA weighting value, and then adding up all of the results. Time is
factored into this value by logging the average concentration over the user-defined
logging interval.
. The display changes to the next parameter to be configured.
. The display changes to the next parameter to be configured.
ENTER
. The display changes to the next parameter to be
ENTER
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Chapter 7 Configuration and Setup
. If the entry is valid, the display
3
.
. If the entry is valid, the
ENTER
to change
1