Advantech PCI-1710 user manual D/A Calibration

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A/D code		Mapping Voltage

Hex.	Dec.	Bipolar ± 5V	Unipolar 0 to 10V

000h	0	-4.9971V	0V

7FFh	2047	-0.0024V	4.9947V

800h	2048	0V	4.9971V

FFFh	4095	+4.9947V	9.9918V

5.4 D/A Calibration

In a way similar to the ADCAL.EXE program, the DACAL.EXE program leads you through the whole D/A calibration procedure.

You can either use the on-board -5 V (-10 V) internal reference voltage or use an external reference. If you use an external reference, connect a reference voltage within the range ±10 V to the reference input of the D/A output channel you want to calibrate. Adjust the full scale (gain) of D/A channel 0 and 1, with VR4 and VR5 respectively.

Note! Using a precision voltmeter to calibrate the D/A outputs is recommended.

Set the D/A data register to 4095 and adjust VR3 until the D/A output voltage equals the reference voltage minus 1 LSB, but with the opposite sign. For example, if Vref is -5 V, then Vout should be +4.9959 V. If Vref is -10 V, Vout should be +9.9918 V.

48 PCI-1710/1710HG User's Manual

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Contents PCI-1710/1710HG Multifunction DAS Card for PCI Bus Http/support.advantech.com Contents Appendix a 82C54 Counter Chip Functions General Information Flexible Inputs Types and Ranges Setting IntroductionPCI-bus Plug and Play On-board Fifo First In First Out MemoryFeatures On-board Programmable CounterSpecifications Analog InputLinearity error ±1 LSB Input impedance 1 GΩ Digital Input Analog OutputDigital Output Programmable Timer/Counter GeneralBlock Diagram PCIInstallation Initial Inspection UnpackingInstallation Instructions Page Signal Connections Overview I/O ConnectorPin Assignment I/O connector pin assignments for the PCI-1710/1710 HG card Connector Signal Descriptions InputConnector Signal Descriptions part Digital Output signalsSignal Reference Direction Description Name Analog Input Connections Single-ended Channel ConnectionsDifferential Channel Connections Single-ended input channel connectionAignd Differential input channel connection floating signal source Analog Output Connections 10VInternal Pacer Trigger Connection Trigger Source ConnectionsExternal Trigger Source Connection Field Wiring Considerations Page Register Structure and Format I/O Port Address Map Base Read DI9 DI8 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 Base Write DO9 DO8 DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0 Channel Number and A/D Data BASE+0 and BASE+1 Software A/D Trigger BASE+0A/D Channel Range Setting BASE+2 PCI-1710 PCI-1710HG MUX Control-BASE+4 and BASE+5 Example Control Register BASE+6 Status Register BASE+6 and BASE+7 Clear Interrupt and Fifo BASE+8 and BASE+9 10 D/A Output Channel 0 BASE+10 and BASE+11 11 D/A Output Channel 1 BASE+12 and BASE+1312 D/A Reference Control BASE+14 Digital I/O Registers BASE+16 and BASE+17 Read Digital Input Calibration VR Assignment PCL-1710/1710HG VR assignmentA/D Calibration Following list shows the function of each VRD/A Calibration Self A/D Calibration Page 82C54 Counter Chip Functions Counter Intel 82C54Counter 1 Counter Read/Write Control Registers DescriptionRW1 & RW0 STA = Mode 0 Stop on Terminal Count Mode 1 Programmable One-shot PulseMode 2 Rate Generator Counter Operating ModesMode 4 -Software-Triggered Strobe Mode 3 Square Wave GeneratorMode 5 Hardware-Triggered Strobe Counter Operations Counter Read-back CommandRead/Write Operation Counter Latch Operation