Adhesive Tracking System
D-6
Part 1128350_02
E 2020 Nordson Corporation
Useful Calculations and Conversion Formulas
These calculations and conversion formulas are provided for your reference
as needed.
Specific Gravity Calculation
The specific gravity (SG) of adhesive is the ratio of the adhesive density over
water density:
SG
a
= ρ
adhesive
/ ρ
water
For the adhesive density (ρ
adhesive
), refer to the adhesive manufacturer's
Safety Data Sheet (SDS) or Technical Data Sheet (TDS).
NOTE: Some adhesive manufacturers provide specific gravity on the SDS,
some provide it on the TDS, and some do not provide it all. If you cannot find
the specific gravity, contact the adhesive manufacturer. If you are unable to
obtain the specific gravity, you can use the default specific gravity value to
calibrate using the K-factor. Note, however, that if you eventually update the
specific gravity value, you will need to recalibrate the system.
For water density (ρ
water
), refer to the following table:
Water density
[26.7 _C(80_F) at sea level]
0.997 g/cm
3
997 g/L
0.997 kg/L
62.24 lb/ft
3
8.320 lb/US gal
Refer to the SDS/TDS to obtain the density of the adhesive in kg/L or lb/gal.
You can use the density to calculate the specific gravity.
K-Factor Calculation
Refer to Calibrate the Flow Meter under System Setup for an explanation of
how to use the K-Fact or parameter to fine-tune the accuracy of flow meter
measurement results.
Old K-Factor times (*) the displayed Add-On/Product divided ()bythe
actual total add-on weight equals (=) the new K-Factor.
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