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AEM 4-Channel K-Type Thermocouple Amplifier (Model 30-2204)
spenny_b posted a topic in Parts for Sale
AEM 4-Channel K-Type Thermocouple Amplifier Superb little unit to take signals from up to 4 x K-Type thermocouples, amplify and then output them as either analogue signals into an ECU or RS-232 to somewhere else. I used this to interface directly from 2x EGT probes on my exhaust secondaries into the MBE 9A9 ECU that was previously for sale. Works fantastically, accurate, no programming, just fit-and-forget. £199 incl UK mainland shipping to the Westfield community. These units are currently north of £300 (well north of £300 from UK vendors, or around £300 + shipping + import duties + VAT, with a 2-4 week wait if imported from the US) This unit is now surplus to needs, as my new ECU has this function built-in, otherwise I'd have no hesitation in keeping it. As you can see, it's as-new, unmarked and has only been used for 4 days of engine dyno calibration and approx 300-400miles of road driving (drivability calibration work). The original Deutsch plug and harness was used for the original installation, so this isn't included in this sale, but is just a simple 12-way Deutsch connector, widely available on eBay or other automotive electrical vendors. From AEM's site: The 4-Channel K-Type Thermocouple Amplifier is ideal for users who want to accurately monitor multiple engine system temperatures, including water, air, coolant, fuel, disc brake and more. Multiple channels allow you to use each amp to simultaneously read different system temperatures (one channel for EGT, one channel for CLT, etc.). Users can utilize ANY K-Type thermocouple including commonly-available miniature thermocouple connectors, and datalog the readings via an RS-232 serial data stream. K-Type sensors sold separately. Features: Uses common miniature thermocouple connectors or ANY K-Type thermocouple On-board cold junction temperature compensation for laboratory-grade accuracy Includes FOUR (4) 0-5v analog outputs 0-1,000° C(32-1,832° F) measurement range Measures up to 20? C below cold junction temperature RS-232 serial port included for datalogging (programmable EMS not required) "Fault LEDs" indicate when a thermocouple is faulty An excerpt from the AEM documentation below (available in full here >> http://www.aemelectronics.com/files/instructions/30-2204 K-Type Thermocouple Amplifier 4 Channel.pdf ) The Advanced Engine Management (AEM) 4 channel thermocouple amplifier revolutionizes temperature measurements by providing laboratory grade accuracy for your temperature measurements. The accuracy is guaranteed to be better than 1% full scale, even at the extremes of the temperature range. It is designed either for integration into vehicles already fitted with aftermarket ECU’s or other devices that can accept an analog signal for either analysis or logging. Alternately, an RS-232 output is available to allow other programmable devices to use or display the thermocouple temperature data. AEM achieves it’s accuracy by starting with a 100% surface mount PCB. The four differential temperature inputs are fed into an A/D converter then fitted using a 3 stage, 8th order polynomial curve fit. This value is then compensated using our on board cold junction temperature measurement. The temperature values are output on four seperate 0-5v analog outputs and a 232 serial datastream. The thermocouple amplifier can be mounted in the engine compartment or under the dashboard. It is very light and can easily be mounted with Velcro or via the mounting holes. CONNECTION When routing the thermocouple wires to the amplifier, make sure to only use K-type thermocouple wire and only use K-type thermocouple connectors. DO NOT use any other type of connector or material in the wiring between the thermocouples and the amplifier or massive errors will result! The required connectors to plug into the thermocouple amplifier are the “mini blade type”. The 9 wires should be hooked up as follows: Color Marking Connection Red BATT POS Switched +12v In Green TEMP 1 Temp #1 0-5v Output Pink TEMP 2 Temp #2 0-5v Output Brown TEMP 3 Temp #3 0-5v Output Orange TEMP 4 Temp #4 0-5v Output Yellow RS-232 TXD RS232 Transmit Blue RS-232 GND RS232 Ground Grey SIGNAL GND Signal Gnd (used if a differential input is required) Black BATT NEG Battery Ground Thanks for looking, any questions please ask.
