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When making background or scatter measurements, the readings may be too low to trigger a
measurement. In that case a second sensor placed in the beam can be used to trigger the measurement
which will guarantee that the ion chamber's signal is captured during the triggering period of that sensor.
A 180cc, 500cc or 1800cc chamber may be used, depending on the radiation levels to be detected. (Note,
build-up may be required for the 180cc or 500cc chamber for energies above 600 keV.) To minimize noise
or pickup, connect the chamber directly to the digitizer and avoid using extension cables. Place the ion
chamber/digitizer so it will not move by using a test stand or tripod. Position the trigger sensor, such as
the DDX6-WL or even an AGMS sensor, in the beam and use an extension cable to connect it to the
digitizer as shown. If necessary, the USB connection can be extended using active USB extensions or
even USB-over-Ethernet. NOTE: To achieve the maximum sensitivity for the measuring sensor, the dose
rate measured at the trigger sensor should not exceed 1% of its max dose rate (e.g. < 0.06 mGy/s for
the DDX6-WL). To achieve the <1% max dose rate at the trigger sensor, it may be necessary to position
it off axis from the radiation beam or add shielding to the trigger sensor.
Selecting a Display Profile
In Accu-Gold, you can view measurement data using different display profiles. The default profile is
change your display profile at any time, from the Measure views click the settings icon next to the
measurement window and select a profile from the list that appears.
Auto
AGMS General
AGMS GE AMX
Custom Profiles
which will show the appropriate measurement data for the recognized sensor(s). To
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