VR Assignment, A/D Adjustment, Bipolar Calibration | HP 9112

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

Image 76

HP 9112 manual VR Assignment, A/D Adjustment, Bipolar Calibration, Unipolar Calibration, 68 ∙ Calibration

Contents

Page ALL Rights Reserved Trademarks Detailed Company Information Adlink Technology IncQuestions Page Contents Conversion Conversion Digital Input and Output9112DO 9112DA 9112ADSetChannel 9112ADSetRange 9112DblBufferTransfer 9112GetOverrunStatus Appendix A. Demo. Programs Product Warranty/Service What do you need VR Assignment AdjustmentSoftware Utilities PCI Scan Utility How to Use This Guide T r o d u c t i o n FeaturesIntroduction ∙ Specifications ApplicationsAnalog Input A/D Analog Output D/A Digital 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 Controller CPCI-9112 Layout PCB Layout of the PCI-9112 Analog Input Channel Configuration Jumper Settings10 ∙ Installation Clock Source Setting D/A Reference Voltage Setting Internal Reference Voltage Setting 12 ∙ Installation CN 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 ∙ Installation Daughter Board Connection Connect with ACLD-8125Connect with ACLD-9137 Connect with ACLD-9182 Connect 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 Format D/A Output Register Mode A/D control Register22 ∙ Registers Format Auto-Scan Bit MUX Register Bit8 ~ Bit5 24 ∙ Registers Format A/D Status Register Software Trigger Register Digital I/O register 26 ∙ Registers Format High 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 Theorem Differential input mode Single-ended ModeOperation Theorem ∙ 4 Floating source and differential input 30 ∙ Operation Theorem 1 A/D Conversion Procedure Timer Pacer Trigger2 A/D Trigger Modes Software trigger 3 A/D Data Transfer Modes External TriggerSoftware Data Transfer Drdy Interrupt Transfer Intx D/A Conversion DMA Transfer Dmax Digital Input and Output 34 ∙ Operation Theorem Timer/Counter Operation Counter General Purpose Timer/ Counter Pacer Trigger SourceAddress 36 ∙ Operation Theorem Control Byte Mode Definitions 38 ∙ Operation Theorem + + L i b r a r y Libraries Installation++ Library ∙ Programming Guide Naming ConventionData Types 40 ∙ C/C++ Library 9112Initial SyntaxArgument Return Code 9112DI 9112DI ChannelDescription 42 ∙ C/C++ Library 9112DO 9112DA 44 ∙ C/C++ Library 9112ADSetChannel 9112ADSetRange 46 ∙ C/C++ Library 10 9112ADSetMode Cardnumber the card number of PCI-9112 11 9112ADSetAutoscan 48 ∙ C/C++ Library 12 9112ADSoftTrig 13 9112ADAquire 50 ∙ C/C++ Library 14 9112ADDMAStart 52 ∙ C/C++ Library 15 9112ADDMAStatus 16 9112ADDMAStop 54 ∙ C/C++ Library 17 9112ContDmaStart 18 9112CheckHalfReady 56 ∙ C/C++ Library 19 9112DblBufferTransfer 20 9112GetOverrunStatus 21 9112ContDmaStop 58 ∙ C/C++ Library 22 9112ADINTStart 23 9112ADINTStatus 60 ∙ C/C++ Library 25 9112ADTimer 24 9112ADINTStop 2MHz / c1 * c2 62 ∙ C/C++ Library 26 9112TIMERStart 27 9112TIMERRead 28 9112TIMERStop 29 9112AllocDMAMemArgument cardnumber countervalue 64 ∙ C/C++ Library 30 9112FreeDMAMem 32 9112GetSample 66 ∙ C/C++ Library What do you need CalibrationCalibration ∙ A/D Adjustment VR AssignmentBipolar Calibration Unipolar Calibration Reference 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 ∙