AEM 4-Channel K-Type Thermocouple Amplifier - Model 30-2204
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. Essential when working on engine tuning projects, being close to the source, EGT's react far quicker to something being wrong than Lambda (which is often downstream).
These units are currently north of £300 (well north of £300 from UK vendors, or around £300 imported from the US with shipping + import duties + VAT, with a 2-4 week wait)
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). I only used the first two channels, as I was monitoring 2x exhaust gas temperature probes, one on the secondary for each bank.
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.
Selling for £199 + shipping
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 20º C below cold junction temperature
RS-232 serial port included for datalogging (programmable EMS not required)
"Fault LEDs" indicate when a thermocouple is faulty
Full AEM PDF is available from 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 "
Of course, any questions please ask (feel free to PM me as well)
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. Essential when working on engine tuning projects, being close to the source, EGT's react far quicker to something being wrong than Lambda (which is often downstream).
These units are currently north of £300 (well north of £300 from UK vendors, or around £300 imported from the US with shipping + import duties + VAT, with a 2-4 week wait)
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). I only used the first two channels, as I was monitoring 2x exhaust gas temperature probes, one on the secondary for each bank.
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.
Selling for £199 + shipping
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 20º C below cold junction temperature
RS-232 serial port included for datalogging (programmable EMS not required)
"Fault LEDs" indicate when a thermocouple is faulty
Full AEM PDF is available from 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 "
Of course, any questions please ask (feel free to PM me as well)
