Ran zero count and flow rate tests on dust monitors EX Loc#1, EY Loc#1, CS Loc#6, Loc#10, Optics Lab Lab#1, Lab#2, Diode Room DR Loc#1. Will check the two monitors in the PSL enclosure next week, when in for cleaning. All zero counts and flow rate tests passed, except as noted below. Optics Lab Loc-#1- lowered the flow down to the 2.8L/M rate. Diode Room DR Loc#1 - The flow is down to about 2.7L/M This is close to the 2.6L/M lower operating limit. This unit does not have adjustable flow rate. If the flow drops any lower will need to swap the unit out and send it back for service. Closing FAMIS #12979