04/03
347
LB 444
51
For other units of measure (e.g. °Bx, %-concentration, g/l, etc.), the temperature coeffi-
cient has to be converted accordingly. To do this, one first has to calculate the density
change/unit of measure obtained for the measuring range (e.g. %):
2
1
2
1
change
C
C
C
ion
Concentrat
change
Density
C
C
−
−
=
∆
∆
=
ρ
ρ
ρ
ρ
C1
= Density at average temperature and minimum concentration in measuring range.
ρ
C2
= Density at average temperature and maximum concentration in measuring range.
Example:
ρ
C1
at 20° C and 20 % HCl = 1.0979 g/cm
3
ρ
C2
at 20° C and 30 % HCl = 1.1493 g/cm
3
%
*
00514
.
0
%
30
%
20
1493
.
1
0979
.
1
3
cm
g
C
=
−
−
=
∆
∆
ρ
The temperature coefficient TC' for the unit % is calculated as follows:
TC
TC
C
'
.
.
.
=
=
=
1
0 00059
0 00514
011478
∆ρ
∆
Input value: 1.1478e-01
Summary of Contents for LB 444
Page 1: ...Density Meter LB 444 Id No 32816BA2 Rev No 04 22 04 03 ...
Page 2: ......
Page 9: ...04 03 347 LB 444 VII ...
Page 10: ......
Page 109: ...04 03 347 LB 444 99 13 4 Mounting Device 90 for Pipe Diameter 21 3 76 1 mm ...
Page 112: ...04 03 347 LB 444 102 ...
Page 113: ...04 03 347 LB 444 103 ...
Page 114: ...04 03 347 LB 444 104 ...
Page 117: ...04 03 347 LB 444 1 14 Ex Certificates for Evaluation Unit ...
Page 118: ...04 03 347 LB 444 2 ...
Page 119: ...04 03 347 LB 444 3 ...
Page 120: ...04 03 347 LB 444 4 15 Ex Certificate for the Detectors ...
Page 121: ...04 03 347 LB 444 5 ...
Page 122: ...04 03 347 LB 444 6 ...
Page 123: ...04 03 347 LB 444 7 ...
Page 124: ...04 03 347 LB 444 8 ...