What are GTC's hours of operation?
  General Technologies is open Monday to Friday, 9AM - 5:30PM PST, except for provincial and national statutory holidays in British Columbia, Canada.
Where can I purchase GTC products?
  You can purchase our products either through one of our distributors, or directly from us. To locate the distributor nearest you, please review our International Distributors page, or our USA Distributors page, which provides the information needed to contact/locate them. If you are unable to find a distributor near you, or if our distributor doesn't carries what you are looking for, you may contact us by phone (toll free 800-440-5582 in Canada and USA, or 604-952-6699), email (order@gtc.ca) or by fax (604-952-6690), and we will provide you with a quote.
Should I purchase through a distributor or directly from GTC?
  We recommend purchasing our products through a distributor nearest to your location, so you can get our service and support through them. However, if you prefer we can ship it directly to you.
Is my product under warranty?
  We recommend purchasing our products through a distributor nearest to your location, so you can get our service and support through them. However, if you prefer we will take your order and ship it directly to you.
Warranty & Return Policy
  If any of our products you purchased develops some technical problem or failure within 12 month since the date of your purchase, it is cover under our warranty, and we will repair or replace it at no charge.
If not under warranty, because the warranty period has expired or has been damaged, you may send it back to us for repair or replacement or alternatively we can also offer you to replace it at a discounted price (which may be more economical that paying for the repair cost plus shipping). Visit our Warranty page for more information on our warranty policy, and our step-by-step procedure on how to claim a warranty.
Returning a product for repair or replacement (under warranty or general repairs)
In all cases, please contact us before sending any product back to us, because depending on the situation we may be able to offer speedier and less costly alternatives, for either your warranty claim or general repair needs.

Warranty Policy: 1 year for parts and workmanship. You may also download our complete 'Standard product warranty' document.

Warranty claims and general repair procedure:
1- Call (1-800-440-5582) or email (techsupport@gtc.ca) technical support before shipping back any product under warrant or for repair.
2- If shipping from the USA, it is preferable for us if you ship by prepaid USPS postal parcel. It is more economical and faster than UPS or FedEx because the simpler customs clearance procedures.
3- If shipping form the USA, write in the envelope or box: "Canadian product returned under warranty" and use declared value for customs of $ 20.00 or less.
4- Write your name and phone number in the envelope, box or paperwork so we can contact you if we need to.
5- In the case the product returned does not qualify for repair or replacement under our warranty policy ( e.g. more than 12 months since the date of purchase, damaged by improper use) or the product was returned for a non-warranty repair, we will provide with you with a cost estimate for the repair or replacement of the product, and obtain your approval before proceeding.

All returns for warranty claims or general repair should be sent to:
General Technologies Corp.
#121 – 7350 72nd Street,
Delta, BC V4G 1H9
Satisfaction warranty
  If one of our products did not meet your expectations, you can do the following in regards to returning the unit for a refund: 1- If you purchased the unit directly from us, we will fully refund your purchase price upon receiving the unit back, providing it was purchased in the last 12 months and is in good condition (i.e. not damaged). 2- In the case you purchased the unit from one of our distributors, you will have to contact them directly about a refund. As described above, we will refund our distributor upon receiving the unit back, providing it was purchased in the last 12 months from that distributor and it is in good condition (i.e. not damaged).
How does ___ product work?
  If you are unsure about how one of our products works, or want to learn more about its functionality, you can find more information in its User Manual, Parts & Accessories, Brochure, and other general information on our Products page.
Product Troubleshooting
  If you are having troubles with one of our products, you can consult your products respective user manual (all available online on our Products page), which can provide you with more information and also contain troubleshooting sections. Additionally, we have answers to more specific questions/problems, listed in the Products section of this FAQ page, which we keep updated with answers for questions we have received from our customers. If you cannot find the solution to your problem in your product's respective manual/user guide or further below in this FAQ section, please do not hesitate to contact us with your questions or any feedback by emailing us to techsupport@gtc.ca or by telephone at 800-440-5582 (Canada and U.S.A.) or 604-952-6699.
Where can I find a user manual for a product?
  We have all our product's User Manuals available for download on our Product page.
Does GTC offer manuals/brochures/etc. in any other languages?
  We offer all of our manuals in both English and French, and we are in the process of adding Portuguese and Spanish. If you have further concerns on our language availability, do not hesitate to contact us, and we will do our best to accommodate your needs.
Where can I find high definition (HD) images of GTC products?
  For HD pictures of our products, and other media, please visit our Media Center page.

Orders & Shipping

Product Inquiry
  If you are interested in learning more about a product, you can find information in the specific product's page. If you would like to receive a hard copy of our brochures, simply send us your mailing address at info@gtc.ca or call 800-440-5582 (Canada and U.S.A.) and 001-604-952-6699.
Payment Terms
  Payment terms are: Prepaid by credit card (MasterCard or Visa), PayPal or Bank transfer.
Shipping Methods
  We ship prepaid freight worldwide by UPS, DHL, TNT Express and XpressPost or using your own carrier or forwarder.
Shipping Pricing
  We offer free ground shipping to any point within the continental U.S.A. and Canada for orders above $ 500.00. For orders below this amount please contact us for a freight quote, or alternatively we can also ship freight collect using your own carrier or forwarder.
Order / Shipping Quotes
  To get a quote for your purchase and shipping, simply contact us with your order details.
Minimum Order Quantity
  You may order from us as many as you need of each part number, without any minimum order requirements.
  To locate the distributor nearest you, please review our International Distributors page, or our USA Distributors page, which provides the information needed to contact/locate them. If you are unable to find a distributor near you, or if our distributor doesn't carries what you are looking for, you may contact us by phone (toll free 800-440-5582 in Canada and USA, or 604-952-6699), email (order@gtc.ca) or by fax (604-952-6690), and we will provide you with a quote.
LCD: Stands for 'Liquid Crystal Display' which refers to a particular type of display technology.
DIS: it can be interpreted as 'Distributorless Ignition System' or 'Direct Ignition System'. In both cases it applies to ignition systems used in four cycle engines only, and in which a pair of spark plug are directly connected to one ignition coil, hence there is no mechanical distributor, and a 'waste spark' is generated in the spark plugs during their respective exhaust stroke.
CNP: Stands for "Coil Near Plug", which refers to ignition systems in which each spark plug has its own ignition coil or module (similar to COP systems), but it is connected to the spark plug by a short high voltage wire (which may or not be accessible).

Clamp Meters

CM100/600/1000: Calibration
  The CM100 is calibrated before shipping from our factory, but it may need to be re-calibrated from time to time according to your requirements. If you need to have your CM100 re-calibrated, this procedure can be performed by any properly equipped calibration lab of your preference. Please ask them contact us directly to techsupport@gtc.ca for calibration instructions.
CM100/600/1000: Line Splitter
  Unfortunately we do not offer a line splitter at this time, but any one should work fine with our CM100.
CM100/600/1000: Clamp
  To measure electrical currents with any accuracy, the clamp has to be completely closed. Clamp meters are calibrated with a close clamp, otherwise the measurements will vary widely according to the gap, and in some cases it may not be able to measure a current at all.
CM100: Analog Output Signal Characteristics
  The CM100 provides with an analog output voltage through the positive and negative socket connectors when set to measure current DCA. This output voltage is proportional to the DC + AC components of the current being measured and has a ratio of 10 mV/A and a 10 KHz bandwidth limit. Note: All measurement errors for the instrument apply as well to this voltage output.
CM100: Amp Reading Problems
  The two most common problems for not getting readings when using a current clamp meter:
1- Make sure that in the wire or cable being measured there is a current present.
2- When measuring currents, only one (1) conductor should be placed inside the CM100's jaw. If the current clamp meter jaw is placed on a power extension cable, appliance power cord, etc., the magnetic field from the live wire cancels with the one form the return or ground wire, causing the CM100 to show "0" (please refer to the CM100 User's Manual)
CM100: General Problem Solving
  If you are having some problems with your CM100, (i.e. getting stuck in power up self-test mode) you may try the following procedure to reset the CM100:
1- Open the CM100 and remove both batteries.
2- While the case is open, take a note (for warranty purposes) of the serial number in the label attached to the inside of the case, opposite to the batteries.
3- Wait for 10 to 15 min, and then replace the batteries with new ones.
The above procedure will reset all the electronics, and likely solve the issue.

Electronic / Electrical Measurement, Testing & Diagnostics

CT8002: Voltage Detection
  In order for the CT8002 to detect a voltage (like in any other voltage measuring instrument) it requires a closed circuit (+ to – or vice versa). In the CT8002 this circuit is established (closed) when a current goes through the tip (+), the internal circuit, the metal barrel of the CT8002, the body of the user and finally ground. The amount of current flowing through the CT8002 and the user's body is very small (in the order of a few micro Amperes), and the user's body acts as a "ground wire" or the negative test lead of a voltage meter. The internal circuit of the CT8002 detects this current, which is used to turn on the buzzer and light indicators.
FF310: Damage Precautions & Warnings
  The FF310 has two modes of operation:
1- Open circuits: When tracing open circuits the FF310T injects into the circuit (i.e. faulty wire) a current limited, 5 volts pulsing voltage, with is the same or below most vehicles' normal operating voltage for electronic modules and systems.
2- Short circuits: For tracing short circuits, the FF310T pulses the power (current) already present in the circuit with a current limiting protection circuit.
The caution in the user's manual regarding air bags, is a precaution to avoid accidental deployment because the pulses used by the FF310 may affect the sensing circuitry and/or sensors of the airbag system.
The FF310 has been in the market for more than 12 years, and with tens of thousands of units in use, we have never received any report or complain of the FF310 damaging any ECM, automotive module, system or circuit.
One thing to keep in mind is that the FF310 is designed to be used in circuits up to a maximum of 42 VDC, and it is internally protected by a surge arrestor which will cause an internal fuse to blow for safety reasons if connected to any voltage above the 42 VDC.
ST05: Identifying the Type of Oxygen Sensor
  There is no easy way to identify the type of oxygen sensor simply looking at it. However there are a few rules to make the process somehow less onerous: 1- 95 % of the Oxygen sensors in the market are the Zirconium type.
2- Titanium 1 V sensors (are made to) behave like Zirconium type. The easiest way to identify them is by measuring the signal circuit, because unlike the Zirconium type sensors, in order to work they need to be supplied with power (1 Volt) by the ECM or PCM.
3- Titanium 5 V are rare, and were mainly used in off-road vehicles in the late 80s and early 90's. The easiest way to identify them is by measuring the signal circuit, because unlike the Zirconium type sensors, in order to work they need to be supplied with power (5 Volt) by the ECM or PCM.
5- Zirconium and Titanium sensors may have 1, 2, 3 or 4 wires connections, while wide band (fuel/Air ratio) sensors have a 5 or more connecting wires.
The ST05 is designed to work with all types of sensors, and it will not get damaged when connected to any type of oxygen sensor (including the heater wires) even if the wrong type of sensor is selected, nor it will damage the sensor it is connected to.
ST05: Use on Air Fuel Sensors
  The ST05 can be use for checking wideband or air/fuel ratio sensors. Below is an extract of the ST05 User's Manual where it describes how to use the ST05 with this type of sensor:

4.1.4 Wide Band (Air/Fuel Ratio) dual cell sensors:
These sensors, with the Bosch LSU4 being the most popular one, use two Zirconia cells, one is used as a conventional Zirconium sensor (reference or Nerst cell), and the second is used to 'pump' oxygen into the reference cell in order to keep it at or near the stoichiometric output. The PCM measures how much oxygen (current) it needs to pump into the reference cell to keep it at a set output ( approximately 0.45 Volts), and from this calculates the actual mixture in the exhaust. A basic test can be performed on this type of sensor by simply measuring the output signal of the reference (Nerst) cell, and observing that a good sensor should output a signal level which is steady and near stoichiometric (0.45 Volts).
You may also download the complete ST05 User's Handbook from the ST05 product page.

Temperature Measurement

LTX Measurement Accuracy
  The accuracy of the LTX10 and LTX12 is specified for measurements between 0 to 199.9°C accuracy to be "± 1°C or ± 1.5% + 2°C (whichever is greater)".
This means that if for example the temperature of an object you are measuring is 21°C, a LTX10 or LTX12 displaying any reading within the following values will be performing as specification:
Maximum reading: 21°C + 0.315°C + 2°C = 23.1°C
Minimum reading: 21°C – 0.315°C – 2°C = 18.7°C
However, take into account the following (which applies to all infrared thermometers):
1- Measurements of temperatures close to ambient (which means that the thermometer, the object being measure and the surrounding objects are about the same temperature) are the most difficult to measure accurately, because of the way thermopiles sensors work.
2- When taking measurements (specially close to ambient temperatures), special care should be taken in that the whole 'field of view' of the thermometer is filled with the object under measure.
3- Rapid changes of the temperature of the thermometer itself will affect the measurement accuracy (e.g. if the thermometer was kept in a cold warehouse, it should be allowed to warm up to room temperature before measurements are made).
4- The color and texture of the object being measured also affect the measurement results.
LTX Infrared Thermometers Calibration
  I required, the LTX10 and LTX12 infrared thermometers can be re-calibrated, but it will requires to have specialized pieces of equipment (called "black bodies") costing about USD $ 9,000.00+ each, a temperature controlled room, other special equipment, and some basic knowledge of thermometry. Therefore calibration is better left to be performed by a properly equipped calibration lab.
LTX Catalytic Converter Application Note
  In normal operating conditions (engine running about 2000 RPM, and after a few minutes of warm up) the temperature at the inlet (not the catalytic converter itself) of the catalytic converter should be around 250 to 300 F. The temperature at the outlet, if the catalytic converter is working properly, should be no more than 100 to 150 F higher than the inlet (i.e. 350 to 450 F). Higher outlet temperatures may indicate an engine problem (e.g. mixture too rich) and a lower temperature may indicate a blocked catalytic converter.
At 600 F a catalytic converter will start to glow red, and probably damage beyond repair if at higher temperatures. Therefore, the models LTX10 and LTX12 infrared thermometers are capable of measuring temperatures within the normal working range of an automotive catalytic, and well above any reasonable temperature necessary to diagnose them.

Engine Testing & Diagnostics

TA100: Servicing/Calibration
  The TA100 SmarTach+ does not contains any serviceable parts (except for the battery) nor needs calibration, as the measurements are based on a crystal oscillator that maintains long term stability within its specifications.
TA100: Display Turning Off
  The TA100 has a special automatic protection mode, which temporarily shuts down the display (and other internal circuits) in order to avoid damage to its electronics. This protection mode is activated when the TA100 senses an overvoltage (usually applied to the capacitive sensor or flexible probe).
This protection mode is not activated under normal circumstances, but it will activate if the capacitive sensor or flexible probe receives direct discharges (arching) from the ignition system. This may happen if, for example, there are small cracks or damage to the insulation of the spark plug wire, spark plug boot, etc., which cause small sparks (sometimes invisible to the naked eye, except in complete darkness) to jump directly from the center conductor of the spark plug wire to the capacitive sensor or flexible probe. You may test if this is the case by applying two or more layers of electrical insulating tape to the interior of the 'U' opening of the capacitive sensor to make up for the loss of insulation of the spark plug wire or replacing the damaged spark plug wire for a new one.
TA100: RPM Reads Double.
  In some 4 cycle engines, the TA100 may read double the actual engine's RPM, because they use an ignition system which produces a spark during the exhaust cycle, usually called a waste spark. Because of this, the TA100 detects one spark per revolution (as in a 2 cycle engine), instead of the one spark every two revolutions as in a four cycles engine equipped with a conventional ignition system.
There are two ways to set the TA100 to read the correct RPM:
1- Set the number of cycles to two (because although you are measuring RPM on a 4 cycle engine, the ignition system behaves as in a 2 cycle engine).
2- Set the number of cycles to "DIS", which is a setting of the TA100 specially designed to deal with ignition systems with waste spark as described above.
TA100 use with COP Systems
  The TA100 is designed to be used with conventional ignition systems (i.e.: high voltage spark plug wires), but it may be able to measure RPM, and also provide with some kind of spark plug peak voltage reading in some types of Coil on Plug modules. To try this simply position the capacitive pickup (at the end of the flexible probe) on top or side of the Coil on Plug module.
For Coil on Plug ignition systems, we have the Model TA500, which measures RPM, spark burn time, and spark plug peak voltage when used on Coil on Plug ignition systems and other ignition systems.
For more information please visit our TA500 Smartach+COP page.
TA100 vs TA500: Comparison / Differences
Measures: RPM and spark plug peak voltage
Compatible with: All ignition systems using high voltage spark plug wires (conventional distributor/ignition coil, distributorless or direct ignition, magneto, etc.)
Mostly for use in older cars, marine, motorcycles and small engines.

Measures: RPM, spark plug burn time and spark plug peak voltage.
Compatible with: All ignition systems using high voltage spark plug wires (conventional distributor/ignition coil, distributorless or direct ignition, magneto, etc.), but specially designed for COP (Coil on Plug) y CnP (Coil near Plug)
For use in all kind of gasoline and CNG engines

TA110: Certificate of Calibration
  Click here to download a Certificate of Calibration for the TA110. The serial number goes by <yy><mm><dd>. So for example, if your serial number is "140102", it means that the instrument you have has a manufacturing date of January 2nd of 2013, and it is certified to comply with its published specifications until January 2017.
TA110: Troubleshooting
  If you are having troubles getting measurements with your TA110, we suggest the following:
1- Use the reflective tape we supply with the unit as it 'scatters" the reflected beam, and it is easier for the TA110 to detect it.
2- Although being closer to the target (rotating part) may seem better, sometime because the contrast between the reflective mark and the background is less than necessary, try moving the TA110 away in order to obtain a stable and accurate measurement.
3- Make sure the 9 volt battery is in good condition (it should have 7 V or above), and that the laser pointer is solid and bright.
4- Try aligning the TA110 with the rotating part so the laser beam and the target are as close as possible to a 90 degree angle (i.e. laser beam is perpendicular or normal to the rotating part), and the spot is at the center of the part, otherwise the reflected beam will bounce in a direction other than of the TA110 giving erroneous or no readings at all.
TA300 vs TA303: Comparison / Differences
  The TA300 is a dedicated Diesel engine tachometer, which will work only on diesel engines equipped using individual fuel injection lines (i.e. not common rail), as it uses a piezoelectric pickup that clamps onto a individual fuel line, and senses the high pressure pulses on it to measure RPM.
On the other hand, the TA303 is capable of measuring RPM on any diesel engine regardless the type of injection system it uses. The TA500 detect the ripples generated by the engine's alternator and uses them to measure RPM. Also, because it is independent from the ignition system, it is capable of measuring engine RPM not only on diesel engines but on all types of gasoline engine, as long they are equipped with an alternator.
TA303: Crankshaft & Alternator
  For the TA303 to work, it needs the alternator. The TA303 was specially designed for applications which needed a tachometer to measure RPM easily and quickly on both Diesel and gasoline engines.
How the TA303 works: During the calibration procedure, it measures (at idle speed) the changes caused by each cylinder compression and combustion on the alternator output, while keeping a count of the number of ripples corresponding to each cylinder. After this ratio of ripples per cylinder is found, the TA303 just keeps counting the numbers of ripples and uses them to calculate the engine RPM. This way the user does not have to know beforehand the relationship between crankshaft and alternator speed.
TA300-TD101: Piezo Electric Sensor Replacement
Unfortunately the piezoelectric clamp sensor used for the TD101 and TA300, because of their construction, if damaged can't be repaired, and has to be replaced.
The replacement P/N is for the standard piezoelectric sensor which ships with the TD101 and TA300 is: TD101DSU6.
There are other sizes available, and you can look at them at: http://www.gtc.ca/pdf/parts/TA300.pdf
TA500: Wrong Cycle Setting
  The wrong setting on the number of cycles will only affect the RPM readings, not the burn time nor the spark plug peak voltage measurement.
TA500: Calibration
  The calibration needs to be performed only once per engine, on any spark plug module. This calibration is only used when measuring COP ignition systems, for calibrating the spark plug voltage readings, and does not affect RPM or spark burn time measurements (which is more meaningful than spark plug peak voltage). If the calibration button is accidentally pressed, it is only necessary to redo the calibration procedure if the user want to use compare spark plug peak voltage measurements between COP ignition modules.
TA500: Diagnostic & Troubleshooting Guide
The TA500 User's manual has information on how to use the spark burn time, and peak voltage for diagnostics purposes. You may download a copy of the manual from the TA500 product page.
TA500: Display Going Blank
  There is only one possible cause for the display to go momentarily blank while performing measurements, which is when the TA500 probe receives a high voltage discharge from the ignition system (i.e. a spark jumps directly from the spark plug wire or ignition module to the TA500's probe). This may be caused by a damaged spark plug wire, spark plug boot or ignition module insulation (e.g cracks), or exposed parts of the conductor or connector. Sometime in bright light, small sparks are very difficult to see, and the TA500 will automatically go into a self-protection mode when this happens.
TA500: Display shows "----"
  The display will show "----" while the TA500 is automatically adjusting to the present signal strength, if the signal is not stable (e.g.: changing the position of the TA500's probe too quickly, widely changing spark plug voltages), or cannot detect any signal from the ignition system.
TA500: Normal Range of Burn Time and Ignition Output
  Normal ranges for spark plug burn time varies from 1 to 3 ms, and spark plug peak voltage from 8 to 15 kV.
TA500: Measuring waste spark or DIS ignition systems (i.e. one ignition coil for every two spark plugs)
  The same way you use it on a distributor system, except for: a) Set number of cycles to "DIS" in order to get the correct number of RPM, and b) The positive spark plug will have spark plug peak voltages somewhat lower than the negative one in the pair of spark plug wires connected to the same coil. Negative spark is the conventional mode used in distributor and COP ignition systems.
TA500: Spark burn time or spark plug peak voltage
  are equipped with an alternator.
TD101: Troubleshooting
  If you are having troubles getting measurements with the TD101, you can consult our troubleshooting guide located in the TD101 user's manual. Essentially, the problem may be caused by weak fuel injection pulses in the fuel injection line, and there may be three possible solutions:
1- To use the TD101 with a special type of piezoelectric sensor which instead of having an square opening for fitting to the fuel injection pipe, it has a round one that fits more tightly and generates a better signal for the TD101. The downside of this solution is that these types of sensors are made to fit a specific pipe diameter each (see P/N: TD101DS5, TD101DS6, TD101DS7 and TD101DS0 at http://www.gtc.ca/EN/TD101PA_EN.html)
2- Upgrade to the TA300, which has adjustable threshold and sensitivity level, so it allows to compensate for differences in the pressure of the fuel injection line. However unlike the TD101 it does not measures RPM or spark plug voltage on gasoline engines.
3- Upgrade to the TA303, which instead of using fuel injector lines pulses to measure RPM, it take advantage of the ripples generated by the engine's alternator to measure RPM, and it work with all type of engines regardless of the ignition system (diesel and gasoline). For more information visit the TA303 product page. If your primary use is to measure RPM, then the TA303 may be the best solution, as it was made to replace the TA300 and TD101, and avoids all problems associated with fuel injection lines. The downside is that the TA303 (like the TA300) does not measure spark plug voltage in gasoline engines, and only works on engines equipped with an alternator.