d. Set the Threshold to 1.60 and the Window to 0.80. This broadens the search band to 60 + 10 keV. Set the Threshold to 5.00 and Window to 2.00. This broadens the search band to 60 +10 keV. When set up in this manner, the PG-2 has a sensitivity of 3-5 epm for each pCi/gm of 241Am in soil when the sample measured is of infinite diameter and infinite depth. This may be checked by measuring the standard soil sample at the center of the bottom of the can. The value of the standard soil is approximately 20 pCi/g; therefore the reading should be about 60 cpm. For an ideal sample the reading expected would be about 80 cpm (60-100), but because the depth is only 5 em and the diameter is not infinite the reading is somewhat low. When set up in this manner, the FIDLER has sensitivity of approximately 40-60 epm for each pCi/gm of 241Am in soil when the sample measured is of infinite diameter and infinite depth. List the operating voltage (approximately), threshold and window on the calibration sticker. A-29-7