DA-3100D Digital Timing Light Inductive Xenon Timing Gun Diesel & Petrol Engine Analyzer Tach Dwell Volt Advance

DA-3100D is a Digital  TIMING Tester, TIMING LIGHT for automotive  ignition timing, suit for both DIESEL and  PETROL engine.

INTRODUCTION

1. Timing Light

2. Adjustable Nuts: to adjust the tightness of the Piezo Clamp onto the injector pipe

3. Piezo Clamp: The Piezo Clamp equipped with a sensing element enables to detect the fuel pressure pulse in the injector fuel pipe while fuel is injected into the cylinder and the Piezo Clamp is clamped on the #1 Injector fuel pipe.

4. Mian Cable :.

            a. Battery Clips (red & black): to supply the Timing Light powered from the vehicle battery

            b. Test Clip (green): for RPM, Dwell, Voltage tests

            c. Sensor Connector (white): to connect with Diesel sensor lead or Inductive pickup lead

1. Diesel oil sensor Lead with wire: to produce a signal to trigger the timing light

2. Inductive Pick-up Lead: to clamp onto #1 spark plug of ignition engine system

PETROL TIMING LIGHT

1. Connect the Inductive pick-up lead with the Main cable.

2. Connect Battery Clips to the vehicle battery, Red to Positive terminal and Black to Negative terminal. The vehicle chassis must be connected to the battery Negative terminal.

3. Connect the Inductive pick-up to No.1 SPARK PLUG

What is Timing?

1.   A timing light is used to check the timing on spark ignition engines. Correct timing has a positive influence on the performance and life time of an engine.

2.   At the firing point the spark plug ignites the fuel-air mixture forced into the cylinder by the pistion. The flame spreads from the point of ignition throughout the entire combustion chamber. This is the time when the greatest combustion pressure is exerted on the pistion and therefore also the greatest force is acting on the pistion. As a certain time elapses between ignition and the flame spreading over the entire combustion chamber, ignition must occur before reach the top dead centre. The correct firing point is specified by the verhicle manufacturer. Incorrect adjustment of ignition timing can damage the vehicle.

In the owner's manual, and do-it-yourself reference books and data sheets you will find much helpful information on testing and tuning your vehicle.

Important: Always switch off the ignition before doing the followings.

-connecting motor testing instruments

-replacing ignition sysytem components

While working on an electronic ignition system, be sure DO NOT touch any live parts once the ignition is on and the engine is running. With an electronic ignition system dangerous voltages can occur throughout the sysytem, not only at an individual unit such as the coil or distributor, but also at the cable harness, on pin-and-socket connectors, or connections to testing instruments etc. When testing and tuning with the timing light, be sure DO NOT touch any leads between the instrument and the vehicle.

Preparations for Adjusting the Timing

If the position of the injection pump has been modified or if timing is suspected to be incorrect.

Run the engine to operating temperature, and make certain that the contact breaker points or the dwell angle are correctly adjusted.

1. Use your owner's manual to determine the pertinent technical data of your vehicle (e.g. rpm, dwell angle)

2. Two marks are needed for adjusting the timing:

   a. A fixed mark on the engine housing, usually a pin, arrow or graduated scale

   b. A rotating mark on the flywheel or on the crankshaft pulley, mostly in the form

     of a notch, a steel ball or a graduated scale

You will find that these marks are easier to see if they are clean and you can mark them with a chalk or a white marker.

WARNING:The above marks are usually in the vicinity of hot and rotating parts. Be careful of the exhaust manifolds, fan blades, V-belts, etc.

Testing Procedures

1.Connect the timing light with the car battery, red clip to positive (+)  terminal and

black clip to negative (-) terminal (see Figure 1).

2.  The light pulse is usually triggered by the ignition pulse of the first cylinder.    This may differ in some vehicles, therefore consult your owner's manual.

3.  Clamp the Inductive pickup onto a clean ignition cable and keep the arrow mark shown on pickup points in the direction of the spark plug.

4.  Start the engine and run upto an operating temperature and adjustment speed recommended by the manufacturer.

5.  Press the switch on the handle of the timing light. The advance indicator will light on. Point the timing light at the timing marks.The two marks should normally be opposite one the other. If not, go to next step.

6.  Loosen the clamping of fastening screw on the distributor until the distributor can be turned by hand. Do not loosen too much, otherwise the distributor will turn by itself.

7.  Turn the distributor clockwise or anti-clockwise until the rotating mark is in the   position recommended by the vehicle manufacturer

8.  Re-tighten the lossen screws, to maintain the distributor setting.

9.  Re-check the timing again.

10. Turn off engine and disconnect the timing light and the vehicle.

WARNING:

If the vehicle has a positive earth electrical system, the Xenon lamp is possilbe not light up. In this case reverse the inductive pickup so that the arrow points in the direction of the distributor.

Checkingthe  -CENTRIFUGAL ADVANCE-  and  -VACUUM ADVANCE-

1. Follow the steps 1 to 4 of general procedures on page 2 except increase the engine speed to 2000 rpm.

2.Trigger the timing light and rotate the knob clockwise slowly and stop until the timing mark moves to  “T.D.C.” or “o” position.

3. Read the advance angle reading from the LED display.

4.Compare the reading with manufacturer’s specification.

TACH & ADVANCE

Dwell Angle Measurement Dwell Angle Measurement is indispensible for exact distributor adjustment. Only when the dwell angle is correctly adjusted, a powerful magnetic field can be built up within the coils, thus provides a high energy ignition spark at all engine speeds. 1.   Press the tact switch to light the Dwell indictor. (See figure 2) 2.  Connect the black clip to the negative battery terminal (-) and the red clip to the positive battery terminal(+) . 3.   Connect the green clip to terminal 1 of the ignition coil. (1, D, RUP,-). 4. Start the engine and let it run at idling speed. 5. Read the Dwell Angle reading in % from the display and compare it with the verhicle manufacturer’s recommendations. Refer to the conversion table of Dwell Angle % : on page 8. Should you find any deviations, make the appropriate adjustment. If the Dwell angle is too small, it means the point gap is too large; and the Dwell Angle too large the point gap too small.

DWELL

Tachometer

The tachometer is used to measure the engine speed. The engine speed must be known in order to

-adjust the idling speed

-check the ignition

-adjust the timing

-check the adjustment

1.Press the tact switch to light the RPM indicator.

2.Connect the inductive pick-up to the first cylinder.

3.Connect the red clip to the positive battery terminal (+) and the black clip to the negative battery terminal (-). (See figure 1).

4. Start the engine and read the RPM from the display. Compare the RPM reading  with the figure recommeded by the vehicle manufacturer. Should any deviations be found, mark appropriate adjustments.

Voltmeter

The voltmeter can be used to check the battery voltage and the supply voltage to

various electronic devices, e.g. lamps,etc.

1.Testing of battery voltage under starting current load.

a. Disconnect the ignition by pulling the plug off terminal 1 (1,D,RUP,-) on the

ignition coil.

b. Press the tact switch to light the VOLT indicator.

c. Connect the black clip to the negative battery terminal (-) and the red, green clips to the positve battery terminal (+).

d. Start the engine by another person.

e. Read the voltage from the display.

NOTE: If the battery voltage is less than 9V, strongly recommend to ask a professional techican to check the car battery again.

2. Testing of a car battery on loading (e.g. lamps).

  a. Connect the black clip to the negative battery terminal(-) and the red clip to the

positive battery terminal (+).

  b. Connect the green clip to the positive terminal of the loading device.

  c. Switch on the device and read the voltage from the LED disply.

NOTE: If the voltage is too low, this hints there is leakage through the respective leads or connections. This is frequently happened by heating of connecting terminals, switches or parts of the leads.

NOTE: When the voltage drops greater than what specified in your owner's manual, strongly recommend to ask a professional techican to check this again.

Admissible Voltage Drop

Conversion Table of Dwell Angle

SPECIFICATIONS:

Advance : 0-60 C                   (0.7%RDG + 1%RNG)

TACH : 200-9990 RPM                (0.7%RDG + 1%RNG)

DWELL : 0-99.9%                 (0.7%RDG + 1%RNG)

VOLTS: 0 -16 V                      (0.7%RDG + 1%RNG)

Operation Temperature: 0-40 C                 (0.7%RDG + 1%RNG)

DIESEL TIMING LIGHT

WARNING:

While working around injectors, make certain you should pay extreme attention. When the fuel is injected into the cylinder, the pressure required is enough to inject the fuel under the skin and into the blood stream. At that time if the fuel is injected onto people, this could result in serious injury.

Principle of the Diesel Timing Light:

This Diesel Timing Light is used with an aluminum piezoelectric device and a converter box via pressure pulses detected and converted into electrical signals to trigger this Timing Light. While the aluminum piezo clamp detects a pressure pulse in the diesel fuel injector pipe, will emit an electrical signal to the converter box, and then the converter box will trigger this Timing Light. A technician can use this helpful tool to read a diesel engine’s timing and do any necessary adjustment.

For checking:

1. Injection pump timing under operating conditions without removing any

components

1. Injection pump advance

2. Fuel pressure problems on distributor-type pumps

3. Engine RPM

4. Battery Voltage

Specifications:

-Input power: 10V-30V DC

-Trigger Point: 15% of the highest pressure in the Injector pipe.

-Size of Piezo Clamp: fits for 6mm-10mm (1/4 -3/8 ) of Injector Pipes.

Overview of the 4-Stroke Diesel Combustion Cycle

Induction: As the piston travel down the   cylinder it draws air into the cylinder.                                             

Power: Fuel injected into the cylinder and will self-ignite due to the high temperature.

Compression: As the piston rises. Pressure increases.                               

As the piston passes TDC. it is forced down by the expanding gases.

As pressure increases, temperature increases to about 500C-800C.               

The piston travels down, reducing the pressure resulting in sustained combustion over the whole power

stroke.

The self-Ignition temperature of diesel fuel is approx. 400C  .                          

Exhaust: The exhaust is forced out of the cylinder through an exhaust valve by the rising piston.

Why Diesel Combustion Timing is important?

Timing is critical to the optimal operation of the diesel engine. The fuel is required to be delivered only after temperature has reached over the self-ignition temperature. The gas expansion should begin only after the piston has passed TDC. If timing is set incorrectly, the engine will not perform efficiently.

Problems could occur if timing is set incorrectly.

-Difficult starting hot or cold

-Engine will not rev or is slow to rev up

-Hesitation/stalling/ will not rev in very cold conditions

-Shaky idle

-Excessive fuel consumption

-Black exhaust smoke

-Gray/white exhaust smoke

-Misfiring

-Abnormal knocking from engine

-Engine overheating

-Insufficient power

Testing Procedures

1. Connect Sensor Lead with Main Cable and Timing Light. (See above pic)

2.    Keep the vehicle engine off. Locate the #1 Injector fuel pipe. If the #1

Injector fuel pipe is not accessible, its companion injector’s fuel pipe can

be used for testing.

3.  Clamp the Piezo Clamp on a straight section of #1 Injector fuel pipe as close to the pump as possible (there is less noise on the pump side to interference with the pulse), and away from engine for not acquiring incorrect signal. Piezo Clamp and fuel pipe should be clean and dry. Make sure the fuel pipe is straight and is in contact with the Piezo Clamp but do not overtighten. Overtightening may cause damage on sensor element.

4.  Connect Sensor Lead clips YELLOW to one Adjustable Nut and BLACK to #1 Injector fuel pipe.

Warning: Black Sensor clip DOES NOT touch Glow Plug Plate; it may cause circuit shorten, or even worse to damage a complete circuit and disable engine operation and the connected timing tester.

5.  Connect the Power Lead clips RED to positive and BLACK to negative of the vehicle battery.

6.  Start the engine and warm up to operating temperature, then read the results from the timing light.

Model Number DA-3100NS