This is an extension of the event. In some tasks, there may be many events that are set in order, e.g. in a 10-day weather forecast, an event might be set every six hours, more than 40 events. These events are set in increasing order. By creating a meter that can have values, in this case from 0 to 240, will help to have more valid information on the display.
In a suite definition file, one would have{
task forecast meter step 0 240 240
meter name min max [colour-change]
The meter can be used in triggers in the same way as the events, except that the meter will have a value, e.g.
task plot5days trigger fc/model:step eq 120 # 5 days done
The numeric value used in the triggering means that there is an ambiguity if you have a node with the same name, let's say task "120".