IM-93/UD, 12 cGy.
IM-93A/UD, 12 cGy.
IM-147/PD, 1 cGy.
PART C: REPORT RADIATION DOSAGE READINGS TAKEN WITH A
2-12. General. The standard tactical dosimeter, the IM-93/UD, is issued on the general basis of two per
platoon. If elements of a platoon-size unit operate separately under conditions to warrant it, a wider issue
a. The unit assigns primary and alternate dosimeter wearers for each dosimeter. This allows the
dosimeter to remain with the platoon when the primary wearer leaves the platoon area. When selecting
personnel to wear the dosimeter, you should select personnel who will be doing the same tasks as most of
the other soldiers. The unit dosimeter wearer uses a charged dosimeter to take during-operation readings
or after suspected exposure.
b. Use the following procedures to read the calibrated scale:
(1) Look at a light source through the dosimeter's eyepiece lens.
(2) Rotate the dosimeter until the calibrated scale is in the horizontal position.
(3) Note the position of the shadow (indicating fiber) on the calibrated scale.
(4) Determine the amount of radiation detected.
For example, if the reading on the IM-93/UD or the IM-93A/UD dosimeter's calibrated scale is 75 cGy at
the first reading and 110 cGy at the second, the total radiation exposure for the period is 35 cGy.
c. When the dosimeter is read, the dosimeter wearer makes a note of the reading. The next time
the dosimeter is read, the wearer again makes a note of the reading and reports only the difference
between the two readings. The readings can be jotted down in a pocket notebook and kept until the next
reading. There is no requirement to keep this information as a permanent record. Dosimeters are read
and the readings reported before recharging the dosimeter. The amount of radiation detected in Figure 2-
15 is 125 cGy.