6 COOLANT
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
116
Pub. No. 291Y1-40720 Revision: 5
3 Spread a drop of water over the
surface of the prism taking care that
air bubbles will not enter it.
Fig. 6-11 LLC Concentration Measurement 3
4 Read the scale through the eye
piece.
• Rotate the eyepiece to either side to focus.
Fig. 6-12 LLC Concentration Measurement 4
5 Read the scale at the position where
the blue boundary line comes
across.
Fig. 6-13 LLC Concentration Measurement 5
• How to read the Scale
The scale of the coolant tester is for the
ethylene glycol type. When measuring a
propylene glycol type, convert the reading to
judge by using the table below.
6 Wipe the surface of the prism and
daylight plate with water-soaked
soft facial tissue.
Fig. 6-14 LLC Concentration Measurement 6
60
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
50
40
30
20
10
00
-50
-40
-30
-20
-10
Table 6-3 Scale Conversion Table
Scale
markings
0 5 10 15 20 25 30 35 40 45 50
Convert-
ed value
0 5 9 1418222631353944
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