Note that Revision F of the M1k is calibrated in the Factory and does not need the user to perform any calibration. The purpose of this Document is codify the steps required if the factory settings need to be changed or updated and for the legacy Revision D of the M1k hardware.
The ADALM1000 device can be calibrated by the user to achieve more accurate measurements and signal generation. The calibration procedure requires a Digital Multimeter (DMM) and a resistor with a value anywhere between 2.5Ω and 25Ω.
The device is calibrated by taking a set of measurements according to the procedures described in the sections below. The measurement results must be hand written into a calibration file that will be afterwards used by the calibration software to compute all the calibration parameters and write them into the device.
Calibration support is available only stating from Pixelpulse v0.88 and firmware version v2.06 (You don't need to look at the firmware unless you want to - it's only added here for completeness).
Make sure to update the firmware on your device and Pixelpulse before starting the calibration procedure.
The calibration files contains <reference, value> data pairs for all the measurement and source channels. Below is an example of how a default calibration file looks like.
# Channel A, measure V </> <0.0000, 0.0000> <2.5000, 2.5000> <\> # Channel A, measure I </> <0.0000, 0.0000> <0.1000, 0.1000> <-0.1000, -0.1000> <\> # Channel A, source V </> <0.0000, 0.0000> <2.5000, 2.5000> <\> # Channel A, source I </> <0.0000, 0.0000> <0.1000, 0.1000> <-0.1000, -0.1000> <\> # Channel B, measure V </> <0.0000, 0.0000> <2.5000, 2.5000> <\> # Channel B, measure I </> <0.0000, 0.0000> <0.1000, 0.1000> <-0.1000, -0.1000> <\> # Channel B, source V </> <0.0000, 0.0000> <2.5000, 2.5000> <\> # Channel B source I </> <0.0000, 0.0000> <0.1000, 0.1000> <-0.1000, -0.1000> <\>
The calibration file must contain for each channel at least the data points shown in the example above. It is possible to add as many data points as desired, the only constraint is that the measurement for offset calibration (0V or 0A reference) has to be the first data pair in the data set. A data set for a channel is delimited by the </> and <\> tags. The order of the data sets in the calibration file must be as in the example and the calibration file must contain all the shown data sets otherwise it is not valid.
The example calibration file can be downloaded from the link below. This file assumes perfect device operation - no offset or gain errors, and can be used to reset your device calibration in case an inaccurate calibration file was loaded into the device.
If an inaccurate calibration file was loaded into the device this can be erased by writing into the device the default calibration file.
When you want to re-calibrate your device, before starting the calibration process write into the device the default calibration file and power cycle the device. This will erase the previous calibration and will ensure correct re-calibration.
To store the calibration data into the device:
The smu binary also supports displaying and resetting calibration for all supported, attached devices via the following:
Make sure that Pixelpulse is closed when running the smu binary.
To acquire the smu binary, use the libsmu installer below in addition to installing the correct architecture support for Microsoft's Visual C++ Redistributable for Visual Studio 2015.
Instructions on how to build, install and use libsmu can be found here.
libsmu installer: libsmu-setup.exe
If you have multiple ADALM1000 devices make sure that just one device is plugged in when trying to store the calibration data.
The procedures below describe all the required steps to perform and record the calibration measurements. The Voltage Source of the ADALM1000 is very precise and normally does not require calibration so it can be left to the default values in the calibration file.
Voltage measurement calibration requires at least 2 data points - 0V and 2.5V. The steps below describe the calibration procedure:
Voltage source calibration requires at least 2 data points - 0V and 2.5V. The steps below describe the calibration procedure:
Current measurement calibration requires at least 3 data points - 0A, 100mA and -100mA. Channels A and B must be calibrated sequentially. The steps below describe the calibration procedure:
Current source calibration requires at least 3 data points - 0A, 100mA and -100mA. Channels A and B must be calibrated sequentially. The steps below describe the calibration procedure:
The ALICE 1.3 DeskTop Software includes a semi-automated method to calibrate the ADALM1000 using the AD584 precision 2.5 V reference from the ADALP2000 Analog Parts Kit. Just wire up an AD584 for a 2.5 V output, powered from the fixed 5V supply from the ALM1000 and follow the steps as outlined in the ALICE desktop user's guide. No DMM needed (except to maybe verify the output of the AD584).