3.A reference material for calibrating and verifying the calorimeter of propellant explosion heat is composed of nitrocellulose(NC),nitroglycerine(NG),centralite and vaseline.
4.California Instruments joins AMETEK as part of its Electronic Instruments Group (EIG) -- a provider in advanced monitoring, testing, calibrating, and display instruments.
5.As a consequence of the drift of inclinometer's mechanicalness and electrical circuit during the long-dated observation,the lattice value of the inclinometer's record trunk must be calibrated termly.