BERG 4008728 Instructions De Montage Et De Service page 5

1. Summarize operating data
a) Change in scale colour during oil check period
--> vertical axis left
b) Operating pressure during oil check period
(max. 7 bar)
--> horizontal axis bottom
c) Check duration
2. The diagonal lines below / above the intersection of
lines "Change in scale colour during oil check period"
/ "Operating pressure" refer to a basic value (without
unit of measurement) for further calculation.
3. Calculation of the average oil load of the compressed
air during the oil check period
Oil load in mg/m³ = Basic value (from 2.)
4. Calculation of value in ppm (if required)
Oil load in ppm = Oil load (from 3.)
Ölprüfindikator
check period in hours
1.29
english
Operating pressure bar (ü)
Example :
1. a) Change in scale colour
(values 0.5 / 1.0 / 1.5 are shown on scale)
(Example) starting value:
(Example) end value
--> Change in scale colour:
b) Operating pressure 7.5 bar: use max. value 7 bar
c) Check duration 50 hours
2. Determination of basic value
Intersection of 0.3 scale colour change / 7 bar
lies between line 4 and line 5
--> Chosen basic value approx. 4.4
3. Calculation of average oil load
Oil load in mg/m³ =
4. Conversion
Oil load in ppm = 0.088 = 0.068 ppm
0.3
0.6
0.3
4.4
50 (hours)
= 0.088 mg/m³
1.29
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