Aim K-type Operator's manual

Sensor documentation: Cylinder head thermocouple – CHT – Version 1.01 1
SENSOR DOCUMENTATION 21/04/2004 TEMPERATURE
Notes: Cylinder head thermocouple technical documentation, dimensions and pinout – Version 1.01
Cylinder head
thermocouple
Figure 1: Cylinder head thermocouple (top and side view)
Introduction
Aim instruments can measure and record cylinder head temperature using a sensor (thermocouple)
positioned under the spark plug. The thermocouple presents a turn in the lower part to make
installation and disinstallation easier.
All Aim thermocouples are K-type sensors.
Installation notes
The head temperature sensor sits between the spark plug and the cylinder head. To keep the sensor
in contact with the cylinder head, it is necessary to remove the washer from the plug when
installing the thermocouple.
While running the thermocouple cable along the chassis, be careful to keep it as far as possible
from other cables (such as RPM or lap receiver cables) in order to minimize interferences between
the cables.
ATTENTION: Before screwing back the spark plug inside the cylinder head, ensure that the
sensor is firmly mated with the cylinder head and, when tightening and loosening the spark plug,
minimize movement of the sensor. Failure to observe this precaution may result in damage to the
sensor
For a correct installation, please watch Figure 2:
Figure 2: Cylinder head thermocouple installation
Spark
CHT thermocouple
Cylinder head

Sensor documentation: Cylinder head thermocouple – CHT – Version 1.01 2
Software
Once the thermocouple has been installed, it is necessary to configurate it. In order to correctly
configurate the sensor, please use Race Studio 2, the software properly developed by Aim to
configure your data logger and to analyze stored data.
Race Studio 2
In Race Studio 2 main window, reported here above, is
possible to choose your Aim instrument. Once selected your
gauge, please press “System manager” button.
Please note: MyChron 3 Basic automatically recognizes the
sensor and needs no temperature sensor configuration.
Sensor configuration
Once reached “System manager” main window, please press
“Channels” button to configure the sensor you have installed
on your vehicle. The following screenshot appears.
To configure the sensor is necessary to double-click in the
box corresponding to “Sensor type” column and to “Ch_x”
row (where x represents the channel number where you wish
to install the sensor): a menu like the one reported in the
previous screenshot appears.
Please, select “K Thermocouple” sensor.
Once selected the correct thermocouple type, is necessary to
configure the visualization’s lower and upper boundary
values.
In order to set these values, please double-click in the row
corresponding to the channel where you have installed the
thermocouple and in the columns corresponding to lower
and upper boundary and fill the boxes with the correct
temperature value.
K-type thermocouples do not need to be calibrated.
Transmitting the configuration
Once the sensor has been correctly configured, please
transmit the configuration to your gauge pressing
“Transmit” button.
During transmission, please do not to switch the gauge
off.

Sensor documentation: Cylinder head thermocouple – CHT – Version 1.01 3
Dimensions
85 [3,34]
45 [1,77]
22,45 [0,88]
Dimensions in millimeters [inches]
Dimensions table – “A”
Applications Internal Diameter
Air cooled Kart 12 mm
Air cooled Kart /Bike 10 mm
Connector details
Pin Function
1 Temperature signal 0-50 mV
2 GND
3 Not connected
13
2
3 pins male Binder 712 connectors pinout: solder termination view
Technical characteristics
Description Value
Temperature range From 0° to 300°C [32°
to 572°F]
Cable length 1400 mm [ 55” ]
Cable type Compensated
Note 1: CHT thermocouple is supplied with a 1400 mm long
compensated cable