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213 DMM
Tektronix 213 DMM User Manual
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Theory
of
Operation-213
Service
3-6
CLOCK
INTEGRATOR
OUTPUT
U260
PIN
8
U250C
PIN
9
0254
U250D
12
U260
PIN
5
U250o/
U250C
13
8
U250D/
U250C
1
1
10
+
HI
LO
HI
LO
ON
OFF
HI
LO
HI
LO
HI
LO
HI
LO
0
0
0
0
n
I
I
r
I
I
I
I
I
r
V
Fig.
3-4.
A/D
Converter
timing
diagram.
0
0
0
0
n
I
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r
I
I
I
I
!
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r
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L
I
1481-12
@
29
31
Table of Contents
Table of Contents
3
List of Illustrations
6
Specifications
9
Operating Instructions
19
Safety Information
19
Controls, Connectors, and Indicators
19
Side Panel
19
Front Panel
20
Rear Panel
21
Probe Storage
21
Probe Characteristics on 200-Series Instruments
21
Operating Power Information
22
Internal Battery Operation
22
Battery Charging
22
Power Line Operation
23
Operating Temperature
23
Operators Adjustments and Basic Displays
23
Operators Adjustments
23
Digital Multimeter Displays
24
Oscilloscope Displays
24
Theory of Operation
25
Digital Logic
25
Block Diagram Description
25
Circuit Description
26
Input Switching
26
Voltage Coupling and Attenuation
26
Current Shunt Resistors
26
Ohms Converter
26
Input Buffer Amplifier
27
Digital Multimeter Functions
27
Active Filter
27
Gm Converter
27
THEORY of OPERATION (Continued)
27
RMS Converter
28
A/D Converter
28
Character Generator
29
Polarity Sign Control
31
Overrange Circuitry
31
Oscilloscope Functions
33
Preamplifier
33
Sweep Generator and Trigger
34
Output Section
34
Vertical Output Amplifier
34
Horizontal Output Amplifier
34
2-Axis Amplifier
34
Crt Circuit
34
Power Supply
35
Inverter and Regulator
35
Low-Voltage Shutdown Circuit
36
Low-Voltage Rectifier-Filter
36
High Voltage
37
Battery Charger
37
Line Input
37
Battery Charger Converter
37
Battery Charger Regulator
37
Maintenance
39
Tektronix Field Service
39
Preventive Maintenance
39
Recalibration
39
Cleaning
39
Visual Inspection
39
Lubrication
39
Corrective Maintenance
40
Obtaining Replacement Parts
40
Soldering Techniques
40
Component Removal and Replacement
41
Troubleshooting
51
Troubleshooting Equipment
51
Troubleshooting Aids
52
Troubleshooting Procedure
53
Instrument Repackaging
55
Performance Check
57
Equipment Preparation
57
Equipment Required
57
Index to Performance Check Procedure
57
Display
58
Check/Adjust Focus
58
Check/Adjust Trace Rotation
58
Vertical System
59
Check/Adjust DC Balance
59
Check Vertical Deflection Accuracy
59
CHECK VOL TS-Ma/DIV VAR RANGE
59
Check/Adjust Attenuator Compensation
59
Check Bandwidth
60
Horizontal System
61
Check Sweep Timing Accuracy
61
Check Sweep Magnifier Range
61
Check Sweep Linearity
61
Check Internal Trigger
62
Check External Trigger
62
Digital Multimeter Measurement System
63
Check Decimal Point Position
63
Check Input Leakage Current
63
Check Character Generator
63
Check Polarity Indication
63
Check DC Voltage Measurement
63
Check RMS Converter DC Voltage
63
Check DC Current Measurement
64
Check Resistance Measurement Accuracy
64
Check RMS Voltage Measurement Accuracy
64
Check RMS Current Measurement Accuracy
65
Calibration
67
Preliminary Information
67
Calibration Interval
67
Tektronix Field Service
67
Using this Procedure
67
Equipment Required
67
Special Calibration Fixtures
67
Calibration Equipment Alternatives
67
Equipment Preparation
69
Index to Calibration Procedure
69
Table of Contents
70
Check/Adjust Sweep Timing
76
Check Sweep Magnifier Range
76
Check Sweep Linearity
77
Horizontal System
76
Check Internal Trigger
77
Check External Trigger
78
Check/Adjust DC Calibration
79
Check/Adjust Decimal Point Position
79
Check Input Leakage Current
79
Digital Multimeter Measurement System
79
Check Character Generator
80
Check Polarity Indication
80
Check DC Voltage Measurement Accuracy
80
Check DC Current Measurement Accuracy
80
Check/Adjust Ohms Calibration
80
Check Resistance Measurement Accuracy
81
Check RMS Converter DC Voltage Response
81
Check/Adjust Rms Converter
81
Alternate Check of RMS Voltage Measure- Ment Accuracy
82
Check RMS Voltage Measurement Accuracy
82
Check RMS Current Measurement Accuracy
83
Instrument Options
85
Replaceable Electrical Parts
87
4
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Tektronix 213 DMM Specifications
General
Brand
Tektronix
Model
213 DMM
Category
Test Equipment
Language
English
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