Справочник Пользователя для alpha-industries mtk005

sTeP 8

After 60 to 72 hours, remove the dome with a razor. Retrieve the dish with the

calcium chloride and immediately place the lid back on and reseal using saved

vinyl tape. Re-weigh the container on the same gram scale used at the start of

the test. record weight, date and time (W2) (T2).

Note the weight as final weight (W2). Do not spill any of the calcium chloride

crystals from the container. If any crystals are spilled, the test must be rerun with

a new test kit.

CalCulaTIoNs

1. Determine the Exposure Time in hours.

Exposure time in hours: T = T2 - T1

(Time = End Time - Start Time)

2. determine the weight gain of calcium chloride.

Weight gain in grams; ∆W = W2-W1

(Weight Change = End Weight - Start Weight)

Moisture Vapor Emission Rate (pounds/1000 sq. ft/24 hours)

Moisture Vapor Emission Rate = 120 x ∆W

alpha Professional Tools

also provides on-line calculator at www.alpha-tools.

com/mcalc.aspx.