9
AQUALAB TDL/TDL 2
Figure 7 Detailed test results screen
5. Select
OK to return to the list of tests.
6. Select
CANCEL to return to the Data tab.
2.5 SETTING UP ISOTHERM-DETERMINED MOISTURE CONTENT
The relationship between water activity and moisture content is called the moisture sorption
isotherm. This relationship is specific to the product type and can be modeled to allow
water activity measurements to be converted to moisture content. This method provides
unmatched precision when compared to traditional moisture measurement methods. All
AQUALAB water activity meters can be connected to the cloud-based SKALA platform to
unlock this functionality.
An active subscription to SKALA includes access to the METER library of existing isotherm
models, allows users to manage all quality data, and enables users to perform advanced
analytics. SKALA is compliant with CFR 21 Part 11 and audit ready. For more information,
visit
metergroup.com/food/skala-system
or contact
.
The AQUALAB
TDL
calculates moisture content values based on water activity readings
using a method known as isotherm-determined moisture content. Isotherm-determined
moisture content relies on models stored in the SKALA isotherm library or on a custom
isotherm model provided by METER Food Lab.
Because there is no standard for dryness, moisture content results vary between reference
methods. These differences are typically linear, and offsetting the model to correlate with
the preferred reference method is straightforward. METER recommends offsetting the model
to a primary reference method (
).
Once a moisture model is loaded on the AQUALAB
TDL
, it will return a moisture content
reading. Until a linear offset has been performed, this moisture content value should not be
considered precise and should be discarded (
). This reading is not a reference
value that can be used to offset the model.
To assign a model to a product, follow these steps:
1. Open
