HP 9112 manual VR Assignment, A/D Adjustment, Bipolar Calibration, Unipolar Calibration

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6.2VR Assignment

There are five variable resistors (VR) on the PCI-9112 board to allow you making accurate adjustment on A/D and D/A channels. The function of each VR is specified as Table 6.1.

VR1	A/D bipolar offset adjustment
VR2	A/D full scale adjustment
VR3	D/A channel 1 full scale adjustment
VR4	D/A channel 2 full scale adjustment
VR5	A/D unipolar offset adjustment
VR6	D/A reference voltage adjustment
VR7	A/D programmable amplifier offset adjustment
	Table 6.1 Function of VRs

6.3A/D Adjustment

6.3.1Bipolar Calibration

1.Set the analog input range as : +/- 5V, i.e. the gain = 1 and input mode = Bipolar.

2.Short the A/D channel 0 (pin 1 of CN3) to ground (GND), and connect the TP1 (+) and TP2 (-) with your DVM. Trim the variable resister VR7 to obtain a value as close as possible to 0V.

3.Apply a +5V input signal to A/D channel 0, and trim the VR2 to obtain reading between 4094~4095.

4.Apply a +0V input signal to A/D channel 0, and trim the VR1 to obtain reading flickers between 2048~2049.

5.Repeat step 3 and step 4, adjust VR2 and VR1.

6.3.2Unipolar Calibration

1.Set the analog input range as : 0 ~ 10 V, i.e. the gain = 1 and input mode = Unipolar.

2.Short the A/D channel 0 (pin 1 of CN3) to ground (GND) and connect TP1 (+) and TP2 (-) with your DVM. Trim the VR5 to -5V reading in the DVM.

68 ∙ Calibration

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Contents Page ALL Rights Reserved TrademarksDetailed Company Information Adlink Technology IncQuestions Page Contents Conversion Conversion Digital Input and Output9112DO 9112DA 9112ADSetChannel 9112ADSetRange 9112DblBufferTransfer 9112GetOverrunStatusAppendix A. Demo. Programs Product Warranty/Service What do you need VR Assignment AdjustmentSoftware Utilities PCI Scan UtilityHow to Use This Guide T r o d u c t i o n FeaturesIntroduction ∙ Specifications ApplicationsAnalog Input A/D Analog Output D/ADigital I/O DIO General SpecificationsProgrammable Counter Programming Library Software SupportingPCIS-LVIEW LabVIEW Driver PCIS-VEE HP-VEE Driver DAQBenchTM ActiveX ControlsDASYLabTM PRO PCIS-DDE DDE Server and InTouchTM∙ Installation InstallationWhat You Have Installation ∙ Device Installation for Windows SystemsUnpacking PCB Layout PCI-9112 LayoutConverter PCI -Bus ControllerCPCI-9112 Layout PCB Layout of the PCI-9112Analog Input Channel Configuration Jumper Settings10 ∙ Installation Clock Source Setting D/A Reference Voltage SettingInternal Reference Voltage Setting 12 ∙ InstallationCN 3 Analog Input / Output & Counter/Timer Connectors Pin AssignmentsPin Assignments of PCI-9112 CN 2 Digital Signal Output do 0 CN 1 Digital Signal Input DI 014 ∙ Installation Pin Assignments of cPCI-9112 Hardware Installation Outline 16 ∙ InstallationDaughter Board Connection Connect with ACLD-8125Connect with ACLD-9137 Connect with ACLD-9182Connect with ACLD-9185 18 ∙ InstallationConnect with ACLD-9138 and ACLD-9188 I/O Registers Map G i s t e r s F o r m a tRegisters Format ∙ A/D Data Registers 20 ∙ Registers FormatD/A Output Register Mode A/D control Register22 ∙ Registers Format Auto-Scan Bit MUX Register Bit8 ~ Bit524 ∙ Registers Format A/D Status Register Software Trigger RegisterDigital I/O register 26 ∙ Registers FormatHigh Level Programming Internal Timer/Counter RegisterLow Level Programming Analog Input Signal Connection E r a t i o n T h e o r e mA/D Conversion 28 ∙ Operation TheoremDifferential input mode Single-ended ModeOperation Theorem ∙ 4 Floating source and differential input 30 ∙ Operation Theorem1 A/D Conversion Procedure Timer Pacer Trigger2 A/D Trigger Modes Software trigger3 A/D Data Transfer Modes External TriggerSoftware Data Transfer Drdy Interrupt Transfer IntxD/A Conversion DMA Transfer DmaxDigital Input and Output 34 ∙ Operation TheoremTimer/Counter Operation CounterGeneral Purpose Timer/ Counter Pacer Trigger SourceAddress 36 ∙ Operation TheoremControl Byte Mode Definitions 38 ∙ Operation Theorem+ + L i b r a r y Libraries Installation++ Library ∙ Programming Guide Naming ConventionData Types 40 ∙ C/C++ Library9112Initial SyntaxArgument Return Code9112DI 9112DI ChannelDescription 42 ∙ C/C++ Library9112DO 9112DA 44 ∙ C/C++ Library9112ADSetChannel 9112ADSetRange 46 ∙ C/C++ Library10 9112ADSetMode Cardnumber the card number of PCI-911211 9112ADSetAutoscan 48 ∙ C/C++ Library12 9112ADSoftTrig 13 9112ADAquire 50 ∙ C/C++ Library14 9112ADDMAStart 52 ∙ C/C++ Library 15 9112ADDMAStatus 16 9112ADDMAStop 54 ∙ C/C++ Library17 9112ContDmaStart 18 9112CheckHalfReady 56 ∙ C/C++ Library19 9112DblBufferTransfer 20 9112GetOverrunStatus21 9112ContDmaStop 58 ∙ C/C++ Library22 9112ADINTStart 23 9112ADINTStatus 60 ∙ C/C++ Library25 9112ADTimer 24 9112ADINTStop2MHz / c1 * c2 62 ∙ C/C++ Library26 9112TIMERStart 27 9112TIMERRead28 9112TIMERStop 29 9112AllocDMAMemArgument cardnumber countervalue 64 ∙ C/C++ Library 30 9112FreeDMAMem 32 9112GetSample66 ∙ C/C++ Library What do you need CalibrationCalibration ∙ A/D Adjustment VR AssignmentBipolar Calibration Unipolar CalibrationReference Voltage Calibration D/A Adjustment2 D/A Channel Calibration Software Utility Software Utilities70 ∙ Software Utility System Configuration Running the UtilityCalibration Software Utility ∙PCI Scan Utility Functional Testing72 ∙ Software Utility P e n d i x a . D e m o O g r a m s DOS SoftwareWindows 95 DLL Appendix a Demo Programs ∙74 ∙ Appendix a Demo Programs Product Warranty/Service Product Warranty/Service ∙