Equipment information

Data Precision 3400R Digital multimeter
Manufacturer:
Model:
3400R
Date:
1978
Category:
Group:
Description:
4-1/2 DIGIT PROGRAMMABLE MULTI METER

Information

Data Precision Model 3400DMM is a local-or remote-programmable 4-1/2 digit digital multimeter, providing up to 12 conversion measurements per second with high accuracy performance. It incorporates Data Precision's Tri-Phasic"^ A/D Conversion, Isopolar^ referencing, and 2- or 4-wire Ratiohmic resistance measurements, as well as auto-zero circuitry that compensates for instrument drift before each and every conversion. Each Model 3400DMM includes all Interface signals for remote programming of range (selected range or auto-range) and mode of signal measurement (DCV, ACV, k i2, or Voltage Ratio), for external trigger control or holding function, and for BCD-formatted output data. All output data signals, as well as conversion status (for remote recording or display) are available as DTL/TTL compatible voltage levels. Complete measurement and control instrumentation is provided as part of the standard Model 3400DMM equipment.

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Service and User Manual
Manual Type:
Service and User Manual
Pages:
49
Size:
4.58 Mbytes (4803421 Bytes)
Language:
english
Revision:
2
Manual-ID:
32-5005-D
Date:
1978 09 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2016 12 29
MD5:
1eabba067e6ff165625345beb7352c84
Downloads:
879

Information

1. INTRODUCTION AND SPECIFICATIONS 1.1 General Description 1.2 Brief Operation Description 1.2.1 Tri-Phasic A/D Conversion 1.2.2 Iso-Polar Referencing 1.2.3 Ratiohmic Referencing 1.3 Specifications 1 .4 Scope of Instruction Manual 2. OPERATION 2.1 Unpacking 2.2 Preparation for Use 2.3 Local & Remote Operation 2.3.1 Guard Connections 2.4 Front Panel (LOCAL) Operation 2.4.1 DCV Measurement 2.4.2 ACV Measurement 2.4.3 Resistance Measurement 2.4.4 Voltage Ratio Measurement 2.5 Remote (PROGRAMMED) Operation 2.5.1 System Connections 2.5.2 Programmed Mode and Range Scale Selection 2.5.3 Remote Trigger and Hoid 2.5 Mixed Local (Front Panel) and Remote (Rear Panel) Operation 3. CALIBRATION 3.1 Calibration Verification 3.2 Preliminary Set Up Conditions 3.3 Calibrating Equipment Table 3.4 Access to Calibration Adjustments 3.5 Calibrating Sequence 3.5.1 Clock Frequency Adjustment 3.5.2 Zero Baseline Adjustment 3.5.3 Reference Voltage Adjustment 3.5.4 Buffer XI0 Gain Adjustment 3.5.5 Input Divider Network Adjustments 3.5.6 AC Frequency Response Adjustments 3.6 Post Calibration 4. PRINCIPLES & THEORY OF OPERATION 4.1 General, Chapter Plan 4.2 System Block Diagram (Figure 4-1) 4.2.1 Signal Conditioning Subsystem 4.2.2 Mode & Range Control Subsystem 4.2.3 Analog A/D Conversion Subsystem 4.2.4 Digital Programming Subsystem 4.2.5 Display Subsystem 4.2.6 Input Control & Output Status Subsystem 4.2.7 Power Supply Subsystem 4.3 System Timing & Waveforms (Figure 4-2) 4.4 Signal Conditioning 4.4.1 DCV Measurement Mode (Figure 4-3) 4.4.2 ACV Measurement Mode (Figure 4-4) 4.4.3 Resistance Measurement Mode (Figure 4-5) i i i 4.4.4 Ratio Measurement (Figure 4-6) 4.5 Tri-Phasic A/D Convers ion (Figure 4-7) 4.5.1 Phase 1 Operation (Auto-Zeroing) 4.5.2 Phase 2 Operation (Input Integ.) 4.5.3 Phase 3 Operation (Ref. Integ.) 4.5.4 Out-of-Range Control Signals 4.6 Digital Programming Subsystem 4.6.1 The Programming Counters 4.6.2 Trigger Generation (Figure 4-11) 4.6.3 First Carry after Trigger (Figure 4-12) 4.6.4 Second Carry after Trigger 4.6.5 Comparator Level Change at End of Reference Integration, In Range 4.7 Out-of-Range 4.8 Range Control & Auto-Ranging Subsystem (Figures 4-13, 4-14) 4.8.1 .Decision Logic Action on Out-of- Range Signal (Under Range) 4.8.2 Range Counter and Decoder Action (Figure 4-14) 4.8.3 Range Counter-to-Relay Actuation 4.9 Display Subsystem 4.9.1 Input to Display 4.9.2 Display Schematic (Dwq. 35-1038) 4.10 Power Supply (Dwg. 35-1042) 4.10.1 Sourcing the Model 3400 DMM 4.10.2 Isolated Analog Supply 4.11 Digital Logic Waveform generation 5. MAINTENANCE 5.1 General 5.2 Parts Grouping and Test Stand Offs 5.3 Trouble Shooting Strategy 5.3.1 Overview 5.3.2 Personnel Considerations 5.4 External/Interface Checks 5.5 Closed-Case Operational Checks 5.5.1 Display 5.5.2 Ranging Circuits 5.5.3 Front-End Analog Circuit Check 5.6 Power Checks 5.6.1 Opening the Case 5.6.2 Regulated Voltage Checks 5.6.3 Unregulated Voltage Checks 5.7 Digital or Analog? 5.8 Digital Circuit Trouble Shooting 5.8.1 Clock & Timing Logic Program 5.8.2 Display Logic 5.8.3 Ranging Ci rcui t 5.9 A/D Analog Circuit Si gnal Tracing 5.9.1 A.D Auto-Zero Check 5.9.2 A/D Phase 2 Checks 5.9.3 A/D Phase 3 5.10 Recalibration 6. PARTS LISTS 6.1 Main PC Board Assembly 6.2 Display Assembly

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