Introduction to DCLF Thermal Measurments
Lesson 1 The Thermocouple
Figure 1-1. Basic thermocouple
Figure 1-2. Seebeck effect
Learning Event 2: Describe Thermocouple Materials and Types
Describe Thermocouple Materials and Types cont'd
Figure 1-4. Typical thermocouple circuits
Figure 1-5. Directly heated thermocouple
Figure 1-6. Indirectly heated thermocouples
Learning Event 3: Describe Thermocouple Applications
Figure 1-7. Thermocouple ammeter
Describe Thermocouple Applications cont'd
Describe Thermocouple Applications cont'd - MM045670020
Describe Thermocouple Applications cont'd - MM045670021
Lesson 1 Practice Exercise - MM045670022
Lesson 1 Practice Exercise cont'd - MM045670023
Lesson 2 DCLF Thermal Transfer Standards
Figure 2-1. AC voltage calibration using AC-DC transfer technique
Figure 2-2. Model 540B Thermal Transfer Standard and Model A54-2 Voltage Plug-in Unit
Percent Input
Protection Disable
Protection Disable cont'd
Sensitivity Switch to Medium
Theory of Operation - MM045670031
Figure 2-4. Model 540B block diagram
Figure 2-5. Search circuit
Protection Amplifier
Figure2-7. Protection amplifier
Figure 2-8. Simplified balance network
Figure 2-10. Nulling circuit
Magnetic Modulator
Figure 2-11. Battery check circuits
Figure 2-12. Model 1395 coaxial thermal converter set
Figure 2-13. Model 1395 schematic
To measure the RMS value of an unknown AC voltage
Figure 2-14. AC voltage measurement
Figure 2-15. Model B7842 Thermal Converter
Practice Exercise - MM045670045
Practice Exercise cont'd - MM045670046
Lesson 3 Reference Standards
Figure 3-1. Model 1600A transfer standard
Figure 3-2. Model 11600A Transfer Assembly
A positive action peak-sensing overload system
Figure 3-3. Model 1600A controls, indicators and connectors
Table 3-1. Controls, indicators, and connectors
Table 3-1. Controls, indicators, and connectors (cont.) - MM045670053
Table 3-1. Controls, indicators, and connectors (cont.) - MM045670054
Thermal EMF in DC output system
Attenuator heating
Learning Event 2: Explain the Model 1600A Operation Modes
Figure 3-4. Equipment interconnection diagram
Explain the Model 1600A Operation Modes cont'd
Explain the Model 1600A Operation Modes cont'd
Figure 3-5. External thermal converter connection
Figure 3-6. Model 1600A block diagram
Figure 3-7. Model 1600A simplified input circuitry
Learning Event 4: Describe the NBS Thermal Voltage Converter Set
Figure 3-9. TVC circuit
Describe the NBS Thermal Voltage Converter Set cont'd
Practice Exercise - MM045670067
Practice Exercise cont'd - MM045670068
Answer to Practice Exercise - MM045670070
DC Low Frequency Thermal Measurments
Lesson 1 The Thermocouple
Figure 1-1. Basic thermocouple
Figure 1-2. Seebeck effect
Learning Event 2: Describe Thermocouple Materials and Types
Describe Thermocouple Materials and Types cont'd
Figure 1-4. Typical thermocouple circuits
Figure 1-5. Directly heated thermocouple
Figure 1-6. Indirectly heated thermocouples
Learning Event 3: Describe Thermocouple Applications
Figure 1-7. Thermocouple ammeter
Describe Thermocouple Applications cont'd
Describe Thermocouple Applications cont'd - MM045670020
Describe Thermocouple Applications cont'd - MM045670021
Lesson 1 Practice Exercise - MM045670022
Lesson 1 Practice Exercise cont'd - MM045670023
Lesson 2 DCLF Thermal Transfer Standards
Figure 2-1. AC voltage calibration using AC-DC transfer technique
Figure 2-2. Model 540B Thermal Transfer Standard and Model A54-2 Voltage Plug-in Unit
Percent Input
Protection Disable
Protection Disable cont'd
Sensitivity Switch to Medium
Theory of Operation - MM045670031
Figure 2-4. Model 540B block diagram
Figure 2-5. Search circuit
Protection Amplifier
Figure2-7. Protection amplifier
Figure 2-8. Simplified balance network
Figure 2-10. Nulling circuit
Magnetic Modulator
Figure 2-11. Battery check circuits
Figure 2-12. Model 1395 coaxial thermal converter set
Figure 2-13. Model 1395 schematic
To measure the RMS value of an unknown AC voltage
Figure 2-14. AC voltage measurement
Figure 2-15. Model B7842 Thermal Converter
Practice Exercise - MM045670045
Practice Exercise cont'd - MM045670046
Lesson 3 Reference Standards
Figure 3-1. Model 1600A transfer standard
Figure 3-2. Model 11600A Transfer Assembly
A positive action peak-sensing overload system
Figure 3-3. Model 1600A controls, indicators and connectors
Table 3-1. Controls, indicators, and connectors
Table 3-1. Controls, indicators, and connectors (cont.) - MM045670053
Table 3-1. Controls, indicators, and connectors (cont.) - MM045670054
Thermal EMF in DC output system
Attenuator heating
Learning Event 2: Explain the Model 1600A Operation Modes
Figure 3-4. Equipment interconnection diagram
Explain the Model 1600A Operation Modes cont'd
Explain the Model 1600A Operation Modes cont'd
Figure 3-5. External thermal converter connection
Figure 3-6. Model 1600A block diagram
Figure 3-7. Model 1600A simplified input circuitry
Learning Event 4: Describe the NBS Thermal Voltage Converter Set
Figure 3-9. TVC circuit
Describe the NBS Thermal Voltage Converter Set cont'd
Practice Exercise - MM045670067
Practice Exercise cont'd - MM045670068
Answer to Practice Exercise - MM045670070
DC Low Frequency Thermal Measurments
