1-12 FT-100/CI and FT-170/CI Operation Guide
Document 40275-0913
6. Do not relocate or dispose of the FT-100/CI without proper
approval. A licensed technician must perform this function.
7. If you have any questions, contact filtec.
1.6.5 How filtec Measures Gamma Radiation
This section tells you how filtec measures the gamma radiation
emitted by the FT-100/CI.
• All measurements are taken with Technical Associates Model
Pug-1 survey meter. The meter was cross calibrated against
an air ionization chamber survey meter whose response was
corrected against an Americium-241 test source.
• Autoshutter closed - The radiation levels are less than 0.05
mR/HR at distances greater than 5 cm from any surface of the
gauge (including inside the tunnel).
• Autoshutter open - The extent of the main gamma beam is
completely contained within the tunnel formed by the
inspection head and shielding bar. All radiation levels outside
the main beam are less than 0.05 mR/HR.
• The exposure rate in the main beam is measured to be
approximately 60 mR/HR at 5 cm from source enclosure
containing 300 millicuries.
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