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Summary of Contents for Itm Accutek III
- Page 1 1.800.561.8187 information@itm.com www. .com...
- Page 2 SECTION 1 INTRODUCTION Thank you for purchasing the ACCUTEK III Capacitive Discharge Ignition Analyser. The ACCUTEK III works with most ignition systems and their components to bring you reliable and accurate test information on component integrity and function. Listed below are some features of the ACCUTEK III analyser: •...
- Page 3 NOTICE The ACCUTEK III analyser and information in this document are sub- ject to change in order to improve reliability, design, or function without prior notice. Information or descriptions in this manual do not represent a commitment on the part of this company.
- Page 4 ACCUTEK III. DO NOT USE IN AN EXPLOSIVE ATMOSPHERE No tests should be performed with the ACCUTEK III unless the opera- tor is fully capable of protecting himself from electrical shock. Do not exceed the input or output specifications of the ACCUTEK III.
- Page 5 USING THE ACCUTEK III Section 3 D.C. Power Supply Power supply stability can be detrimental to proper operation of any D.C. powered equipment. Most manufacturers will supply a maximum amount of power supply instability (referred to as peak to peak noise) for their equipment.
- Page 6 Section 4 Ignition Coils The ACCUTEK III is designed to test most industrial ignition coils by discharging a storage capacitor at 1.0 Hz across the primary side of the ignition coil. The voltage stored on this capacitor is user adjustable from approximately 100 V.D.C.
- Page 7 (section 15) to determine if the coil is within specs. VERY IMPORTANT, PLEASE READ CAREFULLY The information below deals with negative ground systems. Always observe ignition coil polarity before connecting the ACCUTEK III to ignition coils. 4.2 Firing Unshielded ignition coils Note: A shock hazard exists if the following procedure is not followed carefully.
- Page 8 DO NOT EXCEED IGNITION COIL MANUFACTURER’S INPUT VOLTAGE 4.27 Connect the leads from the HV-TEST and COMMON out- puts of the ACCUTEK III to the primary side of the ignition coil while observing proper polarity. 4.28 Place the MEASUREMENT switch to the TRANSFER posi- tion and depress the PUSH TO TEST switch.
- Page 9 To minimize potential electrical shock, only test leads supplied by I.T.S. should be used to test shielded and unshielded ignition coils. • Place the ignition coil so that the secondary tower is at a comfort- able viewing angle. • Follow steps 4.21 to 4.28 1.800.561.8187 information@itm.com www. .com...
- Page 10 When firing ignition coils, a displayed reading of HHH will force the internal oscillator to shut down for safety precautions. Oscillator output can be re-established by turning the TEST switch from the COIL/IGN position to any other position and then returning it back to the COIL/IGN position. 1.800.561.8187 information@itm.com www. .com...
- Page 11 Testing Shielded Secondary Leads The ACCUTEK III, in conjunction with a properly operating ignition coil, can be used to test the integrity of the insulation in a shielded igni- tion lead. Testing a shielded secondary lead is generally safe as the spark path should return to ground through the shielded lead.
- Page 12 Determine the engine firing order and wiring pattern. 6.13 Place one lead of the ohmmeter to pin “A” from main the connector of ignition harness and the other lead to its termi- nation point (ie. “A” or “+” of cylinder #1 ignition coil). 1.800.561.8187 information@itm.com www. .com...
- Page 13 A LEAKAGE test should also be performed at this time. (See Leakage Testing). 6.3 Ground Returns 1.800.561.8187 information@itm.com www. .com Connect the negative lead of the ohmmeter to a good, clean engine ground.
- Page 14 LEAKAGE test (approximately 200 to 900 volts). With the TEST switch in LEAKAGE and the MEASUREMENT switch in any posi- tion except PEAK, the behavior is as follows: The Accutek III turns on the high voltage for 2 minutes in the LEAKAGE position once the PUSH TO TEST switch is depressed.
- Page 15 PEAK VOLTS. The reading displayed is the maximum D.C. volt- age your wiring insulation can withstand. Should the wiring be unable to carry 200 V.D.C., the ACCUTEK III will display a reading of less than 100. Section 8...
- Page 16 8.2 Testing other CD powered instruments: Perform Step 8.11 to 8.13 In this case, the ACCUTEK III will only be providing power to the C.D. powered instrument. The input signal (eg. thermocouple) to the device under test must also be supplied to the instrument and must be verified for proper operation as per instrument manufacturer’s instructions.
- Page 17 While observing polarity, connect the leads from the HV- TEST to the shutdown lead of the ignition system. The ACCUTEK III will now be displaying the primary peak out- put level being delivered from the ignition source. If it is safe to do so, disconnect all devices connected to the shutdown lead.
- Page 18 Resistance in the wiring harness downstream of the test point would result in higher that normal readings. This test should be made at the ignition coil if possible. The following tests will be performed with the “PUSH TO TEST” switch depressed - (ON) 1.800.561.8187 information@itm.com www. .com...
- Page 19 BE OPERATED IN SINGLE STRIKE MODE WHEN TESTING WITH THE ACCUTEK III. The ACCUTEK III has the ability to display a reading of how long (in microseconds) the primary voltage pulse being supplied to the ignition coil remained over 40 volts. Assuming identical (functional) ignition...
- Page 20 10.2 Connect the common lead from the ACCUTEK III to a good, clean engine ground. 10.3 Connect the HV-TEST output to the point to be monitored (i.e. ignition coil positive terminal, terminal strip, ignition coil junction box, etc). With the engine running the ACCUTEK III should be displaying in microseconds how long the primary voltage associated with the point being tested remains over 40 volts.
- Page 21 (Zero if fully shorted.) Readings below 5 microseconds will cause the ACCUTEK III display to alter- nate between actual reading and “LLL”.
- Page 22 WHEN TESTING WITH THE ACCUTEK III. 11.1 When the MEASUREMENT switch is placed in the ENER- GY position, the ACCUTEK III will display a relative read- ing of energy being delivered to the ignition coil under test. 11.2 Place the TEST switch in the COIL/IGN position and the MEASUREMENT switch in the ENERGY position.
- Page 23 OPERATED IN SINGLE STRIKE MODE WHEN TESTING WITH THE ACCUTEK III. The ACCUTEK III has the ability to anticipate firing events on an engine operating at a relatively constant R.P.M. This is very useful in determining if an intermittent engine miss is being caused by a problem with the ignition system.
- Page 24 MEASUREMENT switch to the MISSING PULSE position. 12.2 Connect the COMMON output of the ACCUTEK III to a good, clean engine ground. Connect from the HV-TEST output to the (primary lead positive) point to be monitored. This could be...
- Page 25 Replace the exhausted batteries with fresh alkaline AA cells, taking care to insert the new cells in the correct orientation. Calibration and Adjustments All of the functions of the ACCUTEK III are controlled by the onboard microprocessor system. The instrument should retain its full accuracy providing it is treated with care and the batteries are replaced when the LO BAT indicator illumi- nates.
- Page 26 ACCUTEK III. Except where required by applicable legisla- tion, this warranty is not transferrable. This warranty is void if the ACCUTEK III is used for anything other than its intended purposes or if any modifications or alterations are made to the ACCUTEK III. Innovative Technical Solutions Inc.’s liability under this agreement shall be limited to...
- Page 27 PPT2477AD 0.2 - 0.5 11.0 - 13.0 PPT2477ADL 0.35 - 0.4 12.0 - 15.0 PPT2477M 5.5 - 7.5 9.5 - 11.0 1.800.561.8187 information@itm.com ® AMERICAN BOSCH www. .com TCD90A1 0.2 - 0.3 3.0 - 3.4 TCD90A4 0.2 - 0.3 3.0 - 3.4 TCG90A3 0.5 - 0.6...
- Page 28 (40 VDC) < 5 micro seconds alternates between “LLL” and actual reading. > 500 micro seconds alternates between “HHH” and actual reading Maximum Transfer Measurement (Approx 20 ms) Energy Function Modified product of Transfer and Volts 1.800.561.8187 information@itm.com www. .com...
- Page 29 Innovative Technical Solutions offers the following items for use with the Accutek III. 24BP-ALT Used for testing Altronic ® 3 pin shielded coils 24BP-FM Used for testing Fairbanks Morse/Holley ® 2 pin shielded coils 24BP-BS Used for testing Bosch ®...
- Page 30 INNOVATIVE TECHNICAL SOLUTIONS INC. 1.800.561.8187 information@itm.com www. .com 7127 18 St. S.E. Calgary, Alberta T2C 1K2 Ph (403) 236-4116 • Fax (403) 279-1812 www.intechnical.com...
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