field test 
noun
A test carried out in the environment in which a product or device is to be used.The action plan for emergency calling hopes to get agreement from all agencies on eCall standards and specifications by the end of this year, carry out full scale field tests next year and introduce eCalling in all new vehicles from 2009....
- Still, look on the bright side for the GM companies: a huge field test of the product on human specimens conducted at no expense.
- Compared with laboratory tests, field tests are usually larger, more costly, and more difficult to control and analyze.
verb
(field-test) [with object] Test (a product or device) in the environment in which it is to be used.It is also true that the military-industrial-media complex needs a good little war periodically to keep its production going and to field-test new weaponry....
- James said that many of these devices are currently being field-tested in urban environments, and some will be routinely used within 1 or 2 years.
- We've been field-testing prototypes of Winchester's new slug for the last eight months including hunting wild boar on the Tejon Ranch north of Los Angeles.