Page 203 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 12.2: Checking exhaust gas in Diesel engine

using smoke meter

Objectives

At the end of this exercise you shall be able to
• use of smoke meter
• installation of smoke meter
• setup of instrument for measuring emission parameter
• perform free acceleration test
• measure Light absorption co efficient and Opacity in hat ridges
• examine the result.

Requirements
Tools/Instruments Equipments/Machines
• Trainee’s tool kit - 1 No. • Diesel Engine vehicle - 1 No.
• Smoke tester - 1 No. Materials
• Screw Driver - 1 No. • Cotton cloth - as reqd.
• Diesel - as reqd.

Procedure

Installation of smoke meter
Before switching on, ensure that
• The preselected mains voltage indicated on the rating plate is correct for the local voltage
• There is enough printing paper
• The correct sampling probe is connected to the exhaust pipe of the engine being tested

• The flexible exhaust gas hose is connected to both the probe and the unit. (optional)

Note: Hose should lie at an ascending gradient to the unit

• Check that the operating units properly connected to the control unit.
• Position the equipment where strong vibrations, heavy dust or soiling cannot affect it.
• The equipment should be placed on an even surface where there is no danger of it tipping over.

Note: Diesel fumes are noxious. Ensure adequate air circulation in the test room and proper
ventilation for exhaust fumes.

Pre-measurement preparations

The vehicle must attain the manufacturer’s specified operating temperature before measurement can begin.
• Carefully clean the glass of the light and detect or assemblies with as of cloth.
• Place the sampling hose at an ascending gradient from probe to sensor unit.
• Plug into mains power socket.
• Switch the equipment ON by pressing the Power Key.

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