 |
| At the end of 60 to 72 hours of exposure
time, cut open the plastic dome and carefully retrieve the calcium
chloride dish. Immediately replace the lid and reseal the dish with the
blue tape. Then reweigh the dish as soon as possible. While the
tape-sealed dish is slow to change weight over time, it is critical to the
integrity of the test that the dish unit be reweighed right away. Using
the Tanita portable electronic gram scale, the test can be reweighed
moments after resealing the dish.
Write down the time at which the dish was retrieved, as well as the post-exposure weight, on the dish label and on the instruction booklet. To compute to Pounds per 1,000 sq.ft./24 hrs., simply multiply the change in weight by 118.932 and divide by hours. |