2.3.11 Calculate as Flux Monitor
Choosing the Options # Calculate as Flux Monitor menu item toggles between calculation of J-values and ages. This is possible since ArArCALC requires the input of both the standard age and J-value (and their uncertainties) for every analysis (see also: Your First Calculation ... How to Start). This functionality may be useful to you, when you are reducing data from flux monitor standards, for which both the resulting standard age and J-value are of interest.