Model 9-4 and 9-4RF Overview
The Ludlum Model 9-4 and Model 9-4RF are rugged air ionization chamber meters for measuring beta-gamma dose rates. The Model 9-4RF has improved components and shielding to pass RF susceptibility tests at military levels up to 18 GHz.
For more information about training on Ludlum instruments, contact [email protected].
For more information about Ludlum products, visit our website https://ludlums.com/ or contact [email protected].
0:00 Introduction
2:08 Controls
3:38 Battery Check
5:03 Zeroing the Meter
5:34 Operational Test
6:44 Checking the Desiccant
7:35 Carrying Case