"at a set rate" is correct and usable in written English.
You can use it to refer to a specific rate or speed that is used consistently in a given situation. For example: "The assembly line runs at a set rate of one car per minute."
An interrupt (ISR) is in charge of looping through the sine table at a set rate.
By agreeing to swap currencies at a set rate, Mr. Hinrikus said he saved thousands of dollars in bank fees.
With a fixed, or term, loan, borrowers receive a lump sum that they pay off over a specific period at a set rate.
Standard garbage removal services tend to lock customers into two- to five-year contracts at a set rate, making immediate compost savings difficult to realize.
To simulate non-task-related (background) input, each neuron additionally received a common set of spike inputs from a single Poisson distribution at a set rate.
The investor puts in a lump sum, which is guaranteed for repayment, and the insurer increases this guarantee at a set rate each year.
Since then, most states (but not UP) have introduced a value-added tax at a centrally set rate, and a transition to a national goods-and-services tax has been announced.
Before and 5 (t5), 20 (t20), 35 (t35), and 50 (t50) minutes after the acute exercise bouts, the crude augmentation index (AIx) and the AIx at a set heart rate (AIx@75) were analysed by applanation tonometry.
The line of credit will be guaranteed and will grow at a set interest rate.
Instead, you're loaning that company (or government) your money, at a set interest rate.
With Scribit, publishers can pre-approve their content for syndication at a set payment rate, so it's a simple process to republish something.
