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TTI 1604 - Service Manual

TTI 1604
22 pages
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1604
Digital Multimeter
Service Manual
Book Part Number 48581-1290 - Issue 1

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Summary

Specifications

Accuracy

Details accuracy specifications for DC Volts, AC Volts (True RMS), and Resistance.

DC Volts

Specifies range, accuracy, resolution, and notes for DC voltage measurements.

AC Volts (True RMS)

Details accuracy, resolution, and notes for AC voltage measurements.

Resistance

Lists range, accuracy, resolution, and notes for resistance measurements.

Specifications (Continued)

DC Current

Specifies range, accuracy, resolution, and notes for DC current measurements.

AC Current (True RMS)

Details accuracy, resolution, and notes for AC current measurements.

Frequency

Lists range, accuracy, resolution, gate, and notes for frequency measurements.

Continuity and Diode Test

Describes continuity and diode test functions, voltage, and input limits.

Further Functions

Explains Hold, T-Hold, Min/Max, and Null (Relative) functions.

General Information

Display Settings

Details display type, scale length, annunciators, reading rate, and overrange indication.

Power and Interface

Specifies power requirements, RS232 interface, and operating range.

Environmental and Safety Compliance

Covers environmental conditions, safety, and EMC compliance.

Safety

Essential Earthing Warning

Emphasizes the critical importance of earthing for instrument safety.

Installation Categories

Defines Installation Categories I and II for overvoltage protection.

General Operational Safety

Advises on safe operation, avoiding misuse, and handling defective instruments.

Fuse Replacement Safety

Instructs on using correct fuses for replacement and safety.

EMC Compliance

Emissions Standards

Lists emission standards (EN55022) used for testing.

Immunity Standards

Lists immunity standards (EN60801-2, IEC801-3, IEC801-4) used for testing.

EMC Precautions

Provides precautions for EMC compliance regarding cables and case reassembly.

Installation

Mains Voltage Configuration

Explains how to change the mains operating voltage settings.

Mains Lead Connection

Details correct connection of the mains lead wires.

Critical Earthing Requirement

Reinforces the critical safety requirement for earthing when using AC power.

General Maintenance

Service Handling Precautions

Advises on handling CMOS devices and miniature surface mount components.

Instrument Dismantling Procedure

Provides step-by-step instructions for dismantling the instrument.

Power Disconnection Warning

Crucial warning about disconnecting power before any adjustment or repair.

Circuit Descriptions

Safety for PCB Work

Safety warning related to working on PCBs.

Power Supply Circuitry

Describes the power supply circuitry and voltage values.

Signal Conditioning and Protection

Explains signal conditioning and protection circuits.

A;D Converter and Current Ranges

Details the A/D converter and circuitry for current ranges.

Resistance and Diode Test Circuits

Details how resistance and diode tests are performed.

Circuit Descriptions (Continued)

Frequency Measurement Circuit

Describes the frequency measurement circuitry.

Processor, Keyboard, and Display

Explains the microcontroller, display multiplexing, and keyboard matrix.

Buzzer Circuit

Describes the buzzer oscillator circuit.

Calibration

Calibration Settings and Adjustments

Lists ranges, required inputs, and adjustment potentiometers for calibration.

Fuses

Fuse Replacement Steps

Step-by-step guide for replacing fuses.

Fuse Diagram

Diagram showing the location and rating of current range fuses.

Parts List (Main PCB)

Parts List (Main PCB Continued)

Parts List (Main PCB Continued)

Parts List (Keyboard PCB)

Case Parts

Lists various case components and their positions.

Parts List (Case Parts Continued)

Component Layouts

PCB Layout Diagrams

Shows component placement on the main and display PCBs.

Circuit Diagram

Summary

Specifications

Accuracy

Details accuracy specifications for DC Volts, AC Volts (True RMS), and Resistance.

DC Volts

Specifies range, accuracy, resolution, and notes for DC voltage measurements.

AC Volts (True RMS)

Details accuracy, resolution, and notes for AC voltage measurements.

Resistance

Lists range, accuracy, resolution, and notes for resistance measurements.

Specifications (Continued)

DC Current

Specifies range, accuracy, resolution, and notes for DC current measurements.

AC Current (True RMS)

Details accuracy, resolution, and notes for AC current measurements.

Frequency

Lists range, accuracy, resolution, gate, and notes for frequency measurements.

Continuity and Diode Test

Describes continuity and diode test functions, voltage, and input limits.

Further Functions

Explains Hold, T-Hold, Min/Max, and Null (Relative) functions.

General Information

Display Settings

Details display type, scale length, annunciators, reading rate, and overrange indication.

Power and Interface

Specifies power requirements, RS232 interface, and operating range.

Environmental and Safety Compliance

Covers environmental conditions, safety, and EMC compliance.

Safety

Essential Earthing Warning

Emphasizes the critical importance of earthing for instrument safety.

Installation Categories

Defines Installation Categories I and II for overvoltage protection.

General Operational Safety

Advises on safe operation, avoiding misuse, and handling defective instruments.

Fuse Replacement Safety

Instructs on using correct fuses for replacement and safety.

EMC Compliance

Emissions Standards

Lists emission standards (EN55022) used for testing.

Immunity Standards

Lists immunity standards (EN60801-2, IEC801-3, IEC801-4) used for testing.

EMC Precautions

Provides precautions for EMC compliance regarding cables and case reassembly.

Installation

Mains Voltage Configuration

Explains how to change the mains operating voltage settings.

Mains Lead Connection

Details correct connection of the mains lead wires.

Critical Earthing Requirement

Reinforces the critical safety requirement for earthing when using AC power.

General Maintenance

Service Handling Precautions

Advises on handling CMOS devices and miniature surface mount components.

Instrument Dismantling Procedure

Provides step-by-step instructions for dismantling the instrument.

Power Disconnection Warning

Crucial warning about disconnecting power before any adjustment or repair.

Circuit Descriptions

Safety for PCB Work

Safety warning related to working on PCBs.

Power Supply Circuitry

Describes the power supply circuitry and voltage values.

Signal Conditioning and Protection

Explains signal conditioning and protection circuits.

A;D Converter and Current Ranges

Details the A/D converter and circuitry for current ranges.

Resistance and Diode Test Circuits

Details how resistance and diode tests are performed.

Circuit Descriptions (Continued)

Frequency Measurement Circuit

Describes the frequency measurement circuitry.

Processor, Keyboard, and Display

Explains the microcontroller, display multiplexing, and keyboard matrix.

Buzzer Circuit

Describes the buzzer oscillator circuit.

Calibration

Calibration Settings and Adjustments

Lists ranges, required inputs, and adjustment potentiometers for calibration.

Fuses

Fuse Replacement Steps

Step-by-step guide for replacing fuses.

Fuse Diagram

Diagram showing the location and rating of current range fuses.

Parts List (Main PCB)

Parts List (Main PCB Continued)

Parts List (Main PCB Continued)

Parts List (Keyboard PCB)

Case Parts

Lists various case components and their positions.

Parts List (Case Parts Continued)

Component Layouts

PCB Layout Diagrams

Shows component placement on the main and display PCBs.

Circuit Diagram

TTI 1604 Specifications

General IconGeneral
BrandTTI
Model1604
CategoryMeasuring Instruments
LanguageEnglish

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