DATA PRECISION 5740 User Manual

72-1002
Model 5740 COUNTER
CONTENTS
1. INTRODUCTION
1.1 General
1.2 Specifications
2. OPERATION S CALIBRATION
2.1 General
2.2 Controls £ Indicators
2.3 Measure Frequency
2.3.1 General
2.3.2 Step-by-Step Procedure
2.U Measure Period
2.4.1 General
2.4.2 Step-by-Step Procedure
2.5 Totalizing Events
2.5.1 General
2.5.2 Step-by-Step Procedure
2.6 Stopwatch
2.6.1 General
2.6.2 Step-by-Step Procedure
2.7 Ontions
2.7.1 BCD Outputs
2.7.2 BCD Interfacing
2.7.3 Remote STOP/STOP
2.7.4 External CLOCK
2.8 Calibration
2.8.1 General
2.3.2 Step-by-Step Procedure
3. PRINCIPLES 6 THEORY OF OPERATION
3.1 General
3.2 Simplified Block Diagrams
3.2.1 Measuring FREQUENCY
3.2.2 Measuring PERIOD
3.2.3 Counting Time Increments
(SECONDS)
3.2.4 Totalizing EVENTS
3.3 Gating Controls
3.3.1 Counter Gate
3.3.2 Divider Gate
3.4 Counter-Latch-Display Controls
3.4.1 Intercycle Control
C Repetitive)
3.4.2 Manual Control
3.5 Input Signal Conditioning
3
3
3.8
3.9
6 Time Base Generation
7 Programmable Divider
8 Counter Gating
3.8.1 Counter Gate
Intercycle Control
3.9.1 Repetitive Measurement
3.9.2 Manual Measurement
10 Counter-Latch-Overflow
11 Display
3.12 BCD Option
MAINTE5JANCE
4.1
4.2
General
4.1.1 Technician Qualification
Trouble-Shooting Strategy
4.2.1 Overall Flow Diagram
4.2.2 Display Symptoms
Test Equipment
Overall System Performance Check
4.4.1 General
4.4.2 Set-Up
Power Supply Check
4.5.1 General
4.5.2 Procedure
Crystal Time Base Check
Counter-Latch-Display Check
4.7.1 Set-Up
4.7.2 Procedure
Input Signal Conditioning, Pro
grammable Divider, and Decimal
Point Check
4.8.1 Set-Up
4.8.2 Procedure
5. PARTS LISTS
5.1 Display Assembly
5.2 Main Assembly
6. REFERENCE SCHEMATICS
6.1 Main PC Board
6.2 Display
6.3 BCD Option
4.5
4.6
4.7
4.8
ILLUSTRATIONS
2-1 Model 5740 Front Panel Controls and Indicators
2-2 Model 5740 Rear Panel
3-1 Model 5740 FREQUENCY Measurement Simplified Block Diagram
3-2 Model 5740 PERIOD Measurement Simplified Block Diagram
3-3 Model 5740 SECONDS Measurement (STOPWATCH) Simplified Block Diagram
3-4 Model 5740 EVENTS Totalizing Simplified Block Diagram
3-5 Model 5740 Input Signal Conditioning, Schematic
3-6 Model 5740 Programmable Divider, Schematic
3-7 Model 5740 Counter Gating, Schematic
3-8 Model 5740 Intercycle Control, Schematic
3-9 Model 5740 Intercycle Control, Timing Waveforms
3-10 Model 5740 High Speed LSD Timing Waveforms
4-1 Overall Trouble-Shooting Flow Diagram
4-2 Power Supply Trouble-Shooting Strategy and Test Sequence
4-3 Model 5740 Main PC Board Assembly Test Points and Components
4-4 Crystal Time Base Check Test Sequence
4-5 Input Signal Conditioning 6 Decimal Point Test Sequence
4-0 Input Signal Conditioning £ Attenuator Test Check
4-7 Programmable Divider Test Sequence
4-8 Intercycle Control Test Sequence
COPYRIGHT 1975 DATA PRECISION CORPORATION. PRINTED IN THE USA.

DATA PRECISION 5740 Specifications

General

Brand	DATA PRECISION
Model	5740
Category	Cash Counter
Language	English