Chapter 4 Calibration Procedures© National Instruments Corporation 4-9 AT-MIO-16 User Manual• For analog output channel 0:a. Connect the voltmeter between DAC0OUT (pin 20 on the I/O connector) and AOGND(pin 23).b. Set the analog output channel to 0 V by writing 0 to the DAC.c. Adjust trimpot R7 until the output voltage read is 0 V ±1.22 mV.• For analog output channel 1:a. Connect the voltmeter between DAC1OUT (pin 21 on the I/O connector) and AOGND(pin 23).b. Set the analog output channel to 0 V by writing 0 to the DAC.c. Adjust trimpot R3 until the output voltage read is 0 V ±1.22 mV.2. Adjust the Analog Output GainTo adjust the analog output gain, measure the output voltage generated with the DAC set atpositive full scale (4,095). This output voltage should be V +fs ±1/2 LSB. For unipolar output,V +fs = +9.99756 V, and 1/2 LSB = 1.22 mV.• For analog output channel 0:a. Connect the voltmeter between DAC0OUT (pin 20 on the I/O connector) and AOGND(pin 23).b. Set the analog output channel to +9.99756 V by writing 4,095 to the DAC.c. Adjust trimpot R5 until the output voltage read is +9.99756 V ±1.22 mV, that is, between9.99634 V and 9.99878 V.• For analog output channel 1:a. Connect the voltmeter between DAC1OUT (pin 21 on the I/O connector) and AOGND(pin 23).b. Set the analog output channel to +9.99756 V by writing 4,095 to the DAC.c. Adjust trimpot R4 until the output voltage read is +9.99756 V ±1.22 mV, that is, between9.99634 V and 9.99878 V.
