Step 5. Creating (Edit) Calibrations - Edelbrock QwikData 2 Quick Start Manual

Getting Started

Step 5. Creating (edit) Calibrations

When calibrating a sensor you define a set of points by specifying x and y coordinates. A minimum of two
points are required to create a linear calibration curve. Ideally the calibration should include two points close to
the maximum and minimum raw values. Non-Linear type calibrations(Interpolation) for temperature sensors
require more data points.
A pressure transducer may have a output signal range of .5 volts to 4.5 volts. The LCU converts this voltage to
a Binary representation. QwikData 2 is a 12 bit system with a maximum resolution of 4096 counts(bits). At 0.0
psi the sensor output is .5 volts or 414 bits, at 100 psi the sensor output is 4.40 volts or 3605 bits. A sensor
calibration refers to voltage output as X and the bit count as Y.
A complete understanding of Sensor Calibration is not necessary. The Import Sensor Calibration
function is a simple direct procedure for calibrating most QwikData 2 sensors.
Three procedures for creating Sensor Calibrations are available in QwikData 2. Refer to the underlined links
below for more information.
1. Importing Calibrations. The simplest most direct procedure for creating sensor calibrations is to import
calibrations from a list of sensors organized by part number and accessed with the Import function in the
sensor calibration window.(Microsoft Office Excel must be loaded on computer to function)
2. Calibrating in Manual ADC Count. Follow the Manual ADC Count procedure to manually enter the X and
Y sensor calibration points from the keyboard for you sensors. This is a useful procedure if you are using a
sensor supplied with specific calibration information.
3. Calibrating from Sensor Output. If the output of the sensor is dependant on how it is installed, (a linear
potentiometer used to measure damper movement or throttle position for example) then it is easier to use
direct sensor readings from the logger for the X calibration point while communicating with the logger to
calibrate the channel.
Notes
· It is helpful to first assign Channel names and setup graph scaling's in Channel Parameters for the channels
you will be calibrating.
· Channel names must be entered under Channel Parameters in the Calibration Window. The Channel
Scales, Color and Decimal Points may also be edited in the Channel Data Window.
· Microsoft Office Excel must be loaded in computer for Import Calibration Window to open properly.
Edelbrock QwikData 2
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