Operation Manual / 4 Product description / A100-L
4
Monitoring during operation
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HZTL4034_EN
Revision H
November 2016
4.3
Low pressure measurement at the filter silencer
4.3.1
Introduction
The low pressure measurement with a U-tube manometer is used for the following purposes:
During acceptance test of the engine: Measurement of the correction factor for the calcula-
tion of the turbocharger efficiency
When using a filter mat: An increased pressure loss indicates an increase in the fouling of
the filter material.
4.3.2
U-tube manometer at the filter silencer
Figure 10: U-tube manometer at the filter silencer
81000
Filter silencer
81050
U-tube manometer
A [mm H
2
O]
Pressure loss / pressure difference
If the turbocharger is operated at maximum engine power and pressure loss (A) reaches the
value of 200 mm H
2
O:
Clean filter mat.
NOTICE
Reading of pressure loss
For simple reading of the pressure loss (A), the dipstick at the U-tube ma-
nometer can be pulled out to the level of the lower water level.
Better readability of the U-tube manometer can be achieved by filling with
slightly coloured water.
