Instruction manual

PC27E Page 3
MODEL PC27E 16 CHANNEL 12-BIT A/D BOARD
LIST OF CONTENTS
PARA SUBJECT PAGE
1 GENERAL INFORMATION 5
1.1 General Description 5
1.2 Features 5
2 GETTING STARTED 6
2.1 Installing the PC27E 6
2.2 Requirements to Run the Software 6
2.3 Backing up the Software 6
2.4 Installing the Software on a Fixed Hard Disk 7
2.5 DASH 27 Optional Software for the PC27E 7
3 SPECIFICATIONS 8
4 USER SETTINGS 8
4.1 Board Base Address 8
4.1.1 Factory Setting 8
4.1.2 Customer Configured Base Address 8
4.2 Input/Output Address Space used by the PC27E 9
4.3 Interrupt Request Level Selection 9
4.4 Counter/Timer Clock Selection 10
4.4.1 Timing for A/D Conversions 10
4.4.2 Frequency Measurement 10
4.5 Wait State Generator Setting 11
4.6 Input Voltage Range Setting 11
4.6.1 Input Attenuators 12
5 ELECTRICAL CONNECTIONS 14
5.1 User Connections 14
5.2 EMC Considerations 14
5.3 Main I/O Bus Backplane Connections 14
6 PROGRAMMING 15
6.1 Windows DLLs and Visual Basic Example Programs 15
6.2 Pascal Demonstration Program 16
6.3 Copyright 16
6.4 Programming the 82C53 Counter/Timers 17
6.5 Programming the 7870 A/D Converter 18
6.6 Programming Hints 19
6.6.1 Multiplexer Settling Time 19
6.6.2 Aliasing 19
6.6.3 Inherent offset in Bipolar Mode 20
6.6.4 Multiplexer Inputs 20
6.7 Calibrating the PC27E 20
6.7.1 Unipolar Calibration 20
6.7.2 Bipolar Calibration ±2v 21
6.7.3 Bipolar Calibration ±4v 21
LIST OF FIGURES