Omega Engineering OME-A8111 manual Calibration VR Description

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3.Calibration

The OME-A-8111 is calibrated to its best state of operation. For environments with large vibration, recalibration is recommended. Before calibrating the OME-A-8111, users should have the following items:

zOne 6-digit multi-meter.

zOne stable voltage source (4.9988V)

zDiagnostic program: this program is included in the delivered package and will guide the user to in proceeding with the calibration.

3.1 Calibration VR Description

There are seven VRs on the OME-A-8111. Calibration is needed to adjust all seven VRs.

VR Num.	Description
VR1	D/A Gain adjustment
VR2	D/A Offset adjustment
VR3	A/D Offset adjustment
VR4	A/D's Gain adjustment
VR5	A/D‘s PGA(Programmable Gain Amplifier) Offset Adjustment

VR4

A/D Converter

VR3

D/A Converter

VR1

PGA

VR5

8 ch. Mux

VR2

O.P.

CN1

OME-A-8111 Hardware Manual (ver.1.1, Jul/2003)

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Contents User’sGuide Czech Republic CanadaMexico BeneluxOME-A-8111 Table of Contents Calibration General Description Features3 A/D Converter SpecificationsPower Consumption Analog InputsDigital I/O DA ConverterInterrupt Channel Product Check List Programmable Timer/CounterApplications Board Layout Hardware ConfigurationDefault base address is I/O Base Address Setting1 JP1 D/A Internal Reference Voltage Selection Jumper SettingAddress Read Write I/O Register Address2 A/D Input Buffer Register 8254 Counter4 D/I Input Buffer Register 3 D/A Output Latch Register6 A/D Gain Control Register Clear Interrupt Request7 A/D Multiplex Control Register SI2 SI1 SI0 8 A/D Mode Control Register9 A/D Software Trigger Control Register 10 D/O Output Latch Register CN3 Digital I/OCounter 8254 Timer/CounterSec A/D Conversion2 A/D Conversion Trigger Modes If switching from one channel to the next secPacer Trigger Mode 1 A/D conversion flow3 A/D Transfer Modes Using software trigger and polling transferD/A Conversion Signal Shielding Analog Input Signal Connection CN1 Analog input/Analog output/Connect Pin Assignment Pin AssignmentCN3 Analog input/Analog output/Connect Pin Assignment CN2 Analog input/Analog output/Connect Pin AssignmentOME-DB-16R Daughter BoardOME-CA-4002 OME-DB-16PCalibration VR Description CalibrationD/A Calibration Steps DI/O TestingA/D Calibration Steps WARRANTY/DISCLAIMER Temperature