7-74 824 Reference Manual 9/29/09
LN Centiles Check Menu The Ln Centile view has access to the following Check
menu:
Menu Items Purpose
Ovll Exchange Sets the exchange rate that is used to
calculate the overall TWA.
Ovll Threshold Sets the threshold for computing the
overall time weighted average
(TWA)
Ovll Criterion Sets the TWA level which
constitutes 100% dose for the
overall measurement.
Criterion Time Sets how long of an exposure time
for the TWA level you can have
before 100% dose occurs for the
overall measurement.
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