"when in operation" is correct and usable in written English.
You can use it to describe a situation when something is actively being used. For example: "The automatic doors will not open when the system is not in operation."
When in operation, its beam of X-rays stimulates material under observation to glow at various wavelengths, allowing the identification of constituent elements.
The New Yorker, May 28 , 1960 P. 23A friend of ours recently received a bill from his local gas company (he lives in Roxbury, Massachusetts) reading, "Heater makes loud humming noise when in operation - $4.00".
When in operation, the plant contributes up to 3bn yen (£16m) a year to the local economy, according to the local chamber of industry and commerce, much of it via 3,000 workers who descend on the town twice a year to conduct lengthy safety checks.
By Edward Parone and John McCarten The New Yorker, May 28 , 1960 P. 23A friend of ours recently received a bill from his local gas company (he lives in Roxbury, Massachusetts) reading, "Heater makes loud humming noise when in operation - $4.00".
Open image in new window Fig. 8 Display of Design 1.1 when in operation.
PV systems produce nearly zero carbon emission when in operation, but the manufacturing processes are not free from carbon emissions.
We show that ensemble forecasts exhibit excellent performances when compared to observations and are also satisfying when involved in operation management for electricity production.
Qualitative analysis of the density field in every part of a cylindrical cyclone suggests an optimum design that has exhibited good separation effectiveness and anti-wear performance when in commercial operation.
But how should the police respond, especially when, as in Operation Midland, the allegations are decades old, and suspects are in the public eye?
Thus, a maximum power point tracking (MPPT) controller is needed to continuously deliver the highest possible power to the load when variations in operation conditions occur.
When still in operation, the power stations appeared in films and television programs shot in the Newcastle area.
