KROHNE OPTIMASS Sensors Concentration Measurement EN - Manual (Page 9)

CONCENTRATION MEASUREMENT
3
9
OPTIMASS
www.krohne.com 01/2014 - 4000733002 - AD OPTIMASS Concentration R04
The concentration flow is calculated using the formula:
3.2.5 Sodium Hydroxide (NaOH)
The NaOH algorithm fits the true characteristics of the product to one decimal place (±0.1).
However, the fit is limited to a temperature range of 10...40°C / 50...104°F and a solution range of
0...50%. For information regarding the suitability of measuring tube materials, please refer to
the supplementary instructions relating to corrosion and abrasion.
Concentration total is the accumulation of concentration over time.
3.2.6 API
API gravity is a measure of specific gravity developed by the American Petroleum Institute (API)
for measuring the relative density of various petroleum liquids.
MFC 300 MFC 300 MFC 300 MFC 300
The formula used is: API Gravity = (141.5 / SG
15°C
) - 131.5
SG
15°C
is calculated from the measured density and temperature at a referred temperature of
15°C. The calculation is based on an API correction method for gasoline (petrolium spirit). The
calculation is reliable when used to measure gasoline but can be unreliable when used to
measure other hydrocarbon products. Where the product is not gasoline, use menu option
C2.2.2 or C2.3.2 to enter an offset value. For more information on offset values, please contact
the manufacturer.
MFC 400 MFC 400 MFC 400 MFC 400
The formula used is:
For correct API measurement, set the Density Mode to Standard Density. Configure the Referred
Density temperature to 15°C and set the k terms for the type of liquid being measured. For
further information regarding configuration, please refer to the handbook for the MFC 400.
C
F
concentration flow
Bé Baumé
M
FR
mass flow rate
API g API gravity
ρ density
AD_Concentration_en_140124_4000733002_R04.book Page 9 Tuesday, January 28, 2014 9:28 AM