4.11.
continuity test
Warning!
When checking continuity, be sure to disconnect the power supply from the circuit.
4.11.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.11.2. Turn the rotary switch to the position.
4.11.3. Press the Mode button (fig.1.12) to select the continuity mode.
4.11.4. Connect the test probes to the two ends of the circuit to be tested.
4.11.5. If there is a complete circuit, the analyser will beep continuously. If the circuit is open, there will be no beep and the display will show ol
(over limit).
4.12.
capacitance measurement
Warning!
When checking in-circuit capacitance, be sure to disconnect the power supply from the circuit and that the capacitors are fully
discharged. In order to obtain an accurate reading, a capacitor must be discharged before measurement begins. The meter has a built-in
discharge mode to automatically discharge the capacitor. In discharge mode, the lCd displays “dIS.C”. However discharging through the
chip is quite slow. We recommend that some other apparatue is used to discharge the capacitor.
4.12.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc.
jack.
4.12.2. Turn the rotary switch to the CAP position.
4.12.3. Touch the test probes to the ends of the capacitor and read the capacitor value on the display.
note:
The bar graph is disabled in capacitance measurement mode. However, since the measurement time in the 4mF and 40mF ranges is
quite long (3.75s and 7.5s respectively), the bar graph is used to display the time taken to accomplish the measurement.
4.13.
freQuency measurement
4.13.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.13.2. Turn the rotary switch to the Hz position.
4.13.3. Connect the negative test probe to ground.
4.13.4. Connect the positive test probe to the “signal out” wire of the sensor to be tested.
4.14.
Duty cycle measurement
4.14.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.14.2. T
urn the rotary switch to the %DUTY position.
4.14.3. Connect the negative test probe to ground.
4.14.4. Connect the positive test probe to the signal wire circuit.
4.15.
temperature measurement
Warning!
To avoid heat damage, it is important to keep the analyser away from very high heat sources. The life of the probe is also
reduced if exposed to very high temperatures. Probe operating range is -58°F to 482°F.
4.15.1. Insert the type K thermocouple plug into the analyser using the negative “CoM” jack and the positive V
ΩHz% etc. jack - ensuring the ‘+’
symbol on the plug is inserted into the positive V
ΩHz% etc. jack.
4.15.2. Turn the rotary switch to either the °C or °F position as required.
4.15.3. Place the end of the thermocouple’s tip on the object to be measured.
4.15.4. Read the temperature on the display.
4.16.
pulse WiDtH measurement
4.16.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.16.2. T
urn the rotary switch to the ms-PULSE position.
4.16.3. Press the range button until the negative (-) trigger slope is displayed on the right of the display.
note:
The applied time for most fuel injectors is displayed on the negative (-) slope.
4.16.4. Connect jumper wires between the fuel injector and the harness connector.
4.16.5. Connect negative test probe to a good ground at the fuel injector. or the negative (-) vehicle battery terminal.
4.16.6. Connect the red test probe to the fuel injector solenoid driver input on the jumper cable.
4.16.7. Start the vehicle’s engine. A pulse width in milliseconds should be displayed.
note:
Initially the reading will be ‘ol’, then the reading will descend and stabilise to the actual pulse width. If ‘ol’ remains, re-check the
connections. This can also be used to measure other automotive applications such as fuel mixture control solenoids and Idle air control
motors.
4.17.
rpm measurement
4.17.1. Insert the inductive coupler leads into the analyser. Plug the black lead into the negative “CoM” jack and the red lead into the positive
V
ΩHz% etc. jack.
4.17.2. Turn the rotary switch to either the RPM or x10 RPM position as required ( for the X10 RPM range, multiply the displayed reading times
by 10 to get the actual RPM).
4.17.3. Press the Range button (fig.1.3) to select through RPM 4 for 4-stroke, or RPM 2 for 2-stroke and dIS systems.
note:
RPM 4 for RPM of 4-stroke engines which have 1 ignition on every 4 engine strokes. RPM 2 for RPM of dIS (distributerless Ignition
System) & 2-Stroke engines which have 1 ignition on every 2 engine strokes.
4.17.4. Connect the inductive coupler to a spark plug HT lead. If no reading is received, unhook the clamp, turn it over and connect again.
note:
Position the coupler as far away from the distributor and exhaust manifold as possible. Position the coupler to within 15cm of the spark
plug, or move it to another plug HT lead if no reading or an erratic reading is obtained. The inductive coupler has an adjustable sensitivity
switch that may also be used to correct an unstable reading. Keep the analyser away from the engine to ensure a stable reading is
obtained.
4.18.
DWell angle measurement
dwell angle is the number of degrees through which the distributor cam rotates while the breaker points are closed.
4.18.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.18.2. Turn the rotary switch to the dwell position.
4.18.3. Press the Range button to select the number of cylinders (4, 5, 6 or 8 cylinders).
4.18.4. Connect the black test lead to the Ground terminal (-) on the vehicle’s battery and the red test lead to the contact breaker points or the
negative (-) terminal of the ignition coil.
4.18.5. When the vehicle’s engine is started the dwell angle will be displayed.
note:
To reduce the dwell angle reading the points gap must be increased, to increase the dwell angle the points gap must be reduced. Refer to
your vehicle manufacturer’s handbook for detailed procedures on dwell settings and adjustments.
TA303 Issue 2 (HF) 03/10/18
Original Language Version
© Jack Sealey limited
