Innovate Motorsports DL-32 - Manual (Page 21)

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11. Measuring external 5V sensors
Each of the 5 channels on the DL-32 can be configured to accept input from an external 0..5V
sensor. Hookup is very straight forward, with ground going to the ‘-‘ input for the channel and the
positive sensor signal going to the ‘+’ input for the channel. Raw sensor data can be converted
into meaningful units and values using the input configuration features of LogWorks on a PC.
11.1 Calibrating external 5V inputs
DL-32 external inputs are factory calibrated. However, depending on a number of factors it is not
unusual to see a small discrepancy between values read on an external voltmeter and those read
by LogWorks from an DL-32. If higher precision is required, the DL-32 can be field calibrated.
The following calibration instructions all assume that the input being calibrated has already been
configured for external input. Either using LM Programmer or the front panel interface.
11.1.1 Calibrate using built-in sensor power
In order to calibrate using the built-in sensor power, the following steps must be taken.
• Connect the DL-32 to external 12V power
• Connect a jumper wire between the 5V sensor output and the ‘+’ terminal for the input to
be calibrated
• Press the Channel button until the channel number to be calibrated is displayed
• Press and hold the Calibrate button while the channel number is still displayed
The DL-32 will either display a lower case ‘c’ to indicate the Calibration has occurred for the
selected channel or an upper case ‘E’ to indicate that the calibration could not occur. Normally
an E indicates that the voltage being input is .1V or more off from 5V.
11.1.2 Calibrate using external sensor power
In order to calibrate using external sensor power, the following steps must be taken.