To accurately measure the dryer section condensing rate with a vertical separator, it is necessary that all connections to the separator and all joints in piping and components be completely tight so that no condensate leakage occurs. To accurately time the condensate rise, hand valve(s) must be easily turned and provide tight shut- ff and sight glass must be clean so condensate level can be easily seen. To accurately calculate condensate flow, a calibrated pressure gauge or thermometer (or both) should be installed to determine condensate specific volume. The level control loop must be operational so level can be adjusted; specifically, it must be able to be lowered to provide a sufficient height of rise.