14
It is necessary to configure temperature compensation coefficient of sample and converted
temperature in advance.
10 coefficients for temperature compensation can be stored.
Comp. No.
: Select out of 10 stored values.
Comp. Temp
: Set compensation temperature.
α×
1000
: Set value of (Temp. comp. coefficient of sample
×
1000)
The Comp. Density for Comp. Temp is obtained from the following formula based on the Density at
measurement temperature (Temp.):
Comp. Density = Density
×
{1 +
α
×
(Temp – Comp. temp)}
On the temperature compensation coefficients for typical solutions and how to determine the
coefficients, refer to Appendix 2.
How to obtain temperature compensation coefficient: (depends on sample)
(1)
Using your unit, obtain density at measurement temperature at different ambient condition
(indoor and outdoor), and calculate density change (
α×
10
3
) per 1
°
C from density difference at
different temperature.
(2)
Temperature compensation coefficient can be obtained, using Hydrometer or Oscilation-type
meter (e.g. KEM’s DA-500), by changing measurement temperature.
The preset
α
value can be selected on the measuring screen.
While Comp. Density, SG, Conc. is selected, press [
α
] key for more than 2 seconds.
The
α
value appears on upper left on the screen. Pressing [
+
], [
−
] key displays
α
0 to
α
9 one after
another. Choose desired
α
value and confirm by [ok/meas.] key.
(3) Measurement of specific gravity
Measurement of true specific gravity at displayed measurement temperature
(4) Measurement of specific gravity temperature compensated
ok
Measurement of true specific gravity at preset temperature
It is necessary to configure temperature compensation coefficient of sample and two reference
temperature degrees in advance.
10 coefficients for temperature compensation can be stored
On the temperature compensation coefficients for typical solutions and how to determine the
coefficients, refer to Appendix 2.
For how to obtain temperature compensation coefficient, refer to “(2) Density measurement at
temperature compensated.”
