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Radiation Safety:
Every Heuresis Pb200i Lead Analyzer is designed to be safe as possible. As with any device that
produces ionizing radiation, you should follow basic radiation protection precautions to ensure the
maximum safety for you and those around you.
The Heuresis Pb200i is approved for a 370 MB1 (10 mCi)
57
Co sealed radioisotope; typically, the device
is supplied to customers with a 185 MBq (5 mCi) source. The radioactive material is contained in a sealed
capsule (referred to as a “sealed source capsule”). The capsule is fully contained by the shutter
mechanism and cannot be accidentally (or deliberately) removed from the device without disassembling
the instrument.
The sealed source capsule is located in the instrument’s snout. When the shutter is open, gamma rays
and x-rays from the source are emitted in the forward direction from the front of the device.
There are two controls that need to be activated before the shutter will open. First, the proximity sensor
at the front of the snout must be depressed. To do this, press the front of the instrument against the
surface to be measured. Second, the trigger on the handle must
be
pressed. Opening the shutter starts
the reading. Releasing the trigger or lifting the snout of the instrument from the sample so that the
proximity sensor is not fully depressed will stop a reading in progress.
In a Action Level Mode where the measurement stops automatically, the shutter will automatically close
when the reading is complete.
Caution: The proximity switch must be pressed before the trigger is pressed, or the shutter will not open.
The shutter of the device will automatically close when a reading is complete, even if you continue to hold
the instrument against the sample. The large majority of the instrument readings will take less than two
seconds.
The Pb200i is designed so you cannot accidently open the shutter. The instrument requires a password
to operate the shutter. Be sure to release the trigger before you remove the instrument from the surface
being tested. If you accidentally keep the trigger depressed when you lift the instrument, the shutter will
close automatically, as the proximity switch will not be activated.
The shutter should only be opened when the instrument is placed against the sample. Do not hold the
sample to be measured, or any body parts, in the path of the primary x-ray beam. When measuring a
surface such as a wall or door, make sure no one is located within 1m (approximately 36”) on the direct
opposite side of the surface being measured.
During testing, a strong beam of radiation (gamma-rays and x-rays) is continuously emitted through the
aluminum faceplate at the front of the Pb200i. Some radiation is produced at the top, sides, and bottom of
the snout of the instrument. There is also negligible radiation where your hand holds the instrument.
Warning: Always treat radiation with respect. Do not put your hand on the front end of the Pb200i
while taking a measurement. Never point the Pb200i at yourself or anyone else when the shutter is
open
.
Caution: When testing the exterior of a window from the inside of a room, avoid standing in the
path of the Pb200i's radiation beam. The beam emits upwards from the front of the instrument.
Summary of Contents for Pb200i
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