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TP-7092 2/2170 Section 4 Scheduled Maintenance
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
- 12.2
- 6.7
- 1.1
4.4
10
21.1
26.7
32.2
37.8
43.3
48.9
54.4
60.0
65.6
71.1
15.6
+ .032
+ .030
+ .028
+ .026
+ .024
+ .022
+ .020
+ .018
+ .016
+ .014
+ .012
+ .010
+ .008
+ .006
+ .004
+ .002
0
- .002
- .004
- . 006
- .008
- .010
- .012
- .014
- .016
- .018
- .020
- .022
- .024
- .026
- .028
°
C
°
F
EXAMPLE NO. 1—
Temperature below 80
°
F (26.7
°
C)
Hydrometer Reading 1.250
Acid Temperature 20
°
F (- 6.7
°
C)
Subtract .024 Specific Gravity
Corrected Specific Gravity is 1.226
1.250 - .024 = 1.226
EXAMPLE NO. 2—
Temperature above 80
°
F (26.7
°
C)
Hydrometer Reading 1.235
Acid Temperature 100
°
F (37.8
°
C)
Add .008 Specific Gravity
Corrected Specific Gravity is
1.243
1.235 + .008 = 1.243
The temperature correction amounts to about .004 (4 points) of
specific gravity for each 10°F (5.5°C) change in temperature.
Correction
1-787
Tempera-
ture
Figure 4-13 Specific Gravity Temperature Correction
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