Tektronix 213 DMM User manual

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TektronD<®
COMMITTED TO EXCELLENCE
WARNING
THE FOLLOWING SERVICING INSTRUCTIONS
ARE FOR USE BY QUALIFIED PERSONNEL ONLY.
TO AVOID PERSONAL INJURY, DO NOT
PERFORM ANY SERVICING OTHER THAN THAT
CONTAINED IN OPERATING INSTRUCTIONS
UNLESS YOU ARE QUALIFIED TO DO SO.
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL.
213
DMM
OSCILLOSCOPE
WITH OPTIONS
SERVICE
INSTRUCTION MANUAL
Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077
070-1481-00
Product Group 40
Serial Number _____ _
First Printing JAN 1975
Revised JUL 1989

Copyright © 1975 Tektronix, Inc. All rights reseNed. Contents of this
publication may not be reproduced in any form without the written
permission of Tektronix, Inc.
Products of Tektronix, Inc. and its subsidiaries are covered by U.S. and
foreign patents issued and pending.
~
TEKTRONIX, TEK, SCOPE-MOBILE, and ~ are registered trademarks
of Tektronix, Inc.
Printed in U.S.A. Specification and price change privileges are reseNed.
INSTRUMENT SERIAL NUMBERS
Each instrument has a serial number on a panel insert, tag, or stamped on
the chassis. The first numberor letterdesignatesthe country ofmanufacture.
The last five digits of the serial number are assigned sequentially and are
uniqueto each instrument. Those manufactured inthe United States have six
unique digits. The country of manufacture is identified as follows:
8000000 Tektronix, Inc., Beaverton, Oregon, U.S.A.
HK0OO00 TEKTRONIX, INC., Hong Kong
G100000 Tektronix Guernsey, Ltd., Channel Islands
E200000 Tektronix United Kingdom, Ltd., Marlow
J300000 Sony/Tektronix, Japan
H700000 Tektronix Holland, NV, Heerenveen,
The Netherlands

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TABLE OF CONTENTS
List of Illustrations
List of Tables
SECTION 1 SPECIFICATIONS
SECTION 2 OPERATING INSTRUCTIONS
Safety Information
SECTION 3
REV A JAN 1980
Controls, Connectors, and Indicators
Side Panel
Front Panel
Rear Panel
Probe Storage
Probe Characteristics on 200-Series Instruments
Operating Power Information
Internal Battery Operation
Battery Charging
Power Line Operation
Operating Temperature
Operators Adjustments and Basic Displays
Operators Adjustments
Digital Multimeter Displays
Oscilloscope Displays
THEORY OF OPERATION
Digital Logic
Block Diagram Description
Circuit Description
Input Section
Input Switching
Voltage Coupling and Attenuation
Current Shunt Resistors
Ohms Converter
Input Buffer Amplifier
Digital Multimeter Functions
Active Filter
Gm Converter
PAGE
iv
V
1-1
2-1
2-1
2-1
2-1
2-2
2-3
2-3
2-3
2-4
2-4
2-4
2-5
2-5
2-5
2-5
2-6
2-6
3-1
3-1
3-1
3-2
3-2
3-2
3-2
3-2
3-2
3-3
3-3
3-3
3-3
213 Service

213 Service
TABLE OF CONTENTS (CONT.}
SECTION 3 THEORY OF OPERATION (continued)
RMS Converter
A/D Converter
Character Generator
Polarity Sign Control
Overrange Circuitry
Oscilloscope Functions
Preamplifier
Sweep Generator and Trigger
Output Section
Vertical Output Amplifier
Horizontal Output Amplifier
2-Axis Amplifier
Crt Circuit
Power Supply
Inverter and Regulator
Low-Voltage Shutdown Circuit
Low-Voltage Rectifier-Filter
High Voltage
Battery Charger
Line Input
Battery Charger Converter
Battery Charger Regulator
SECTION 4
MAINTENANCE
Tektronix Field Service
Preventive Maintenance
Recalibration
Cleaning
Visual Inspection
Lubrication
Corrective Maintenance
Obtaining Replacement Parts
Soldering Techniques
Component Removal and Replacement
ii
PAGE
3-4
3-4
3-5
3-7
3-7
3-9
3-9
3-10
3-10
3-10
3-10
3-10
3-10
3-11
3-11
3-12
3-12
3-13
3-13
3-13
3-13
3-13
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-3
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213 Service
TABLE OF CONTENTS (CONT.)
PAGE
SECTION 4 MAINTENANCE {continued}
Troubleshooting 4-13
Troubleshooting Equipment 4-13
Troubleshooting Aids 4-14
Troubleshooting Procedure 4-15
Instrument Repackaging 4-17
SECTION 5 PERFORMANCE CHECK 5-1
Equipment Required 5-1
Equipment Preparation 5-1
Index to Performance Check Procedure
5-1
SECTION 6
CALIBRATION
6-1
Preliminary Information
6-1
Calibration Interval 6-1
Tektronix Field Service 6-1
Using This Procedure 6-1
Equipment Required 6-1
Special Calibration Fixtures
6-1
Calibration Equipment Alternatives 6-1
Equipment Preparation
6-3
Index to Calibration Procedure 6-3
SECTION 7 INSTRUMENT OPTIONS 7-1
SECTION 8 REPLACEABLE
ELECTRICAL PARTS
SECTION 9 DIAGRAMS
SECTION 10 REPLACEABLE MECHANICAL PARTS
CHANGE INFORMATION
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213 Service
iv
LIST OF ILLUSTRATIONS
FIGURE NO.
Frontispiece 213 DMM Oscilloscope.
1-1 Dimensional Drawing
2-1
Side panel.
2-2
Front panel.
2-3 Rear panel.
2-4 Probe storage.
2-5 Probe Body Assembly identification.
3-1 Ohms Converter detailed block diagram.
3-2 RMS Converter detailed block diagram.
3-3 A/D Converter detailed block diagram.
3-4 A/D Converter timing diagram.
3-5 Character Generator Z-axis output.
3-6 Overrange circuitry simplified schematic diagram.
3-7 Overrange timing diagram.
3-8 Power Supply detailed block diagram.
4-1 Typical cam switch.
4-2 Circuit board locator.
4-3 Location of screw securing cabinet halves.
4-4 Power cord and
probe lead routing.
4-5 Power Supply Board disassembly.
4-6 Attenuator and Function Board disassembly.
4-7 Secondary Power Supply disassembly.
4-8 Power-I ine fuse location.
4-9 Current (mA)
input fuse location.
4-10 Terminal connector holder.
4-11 Installation
of extender cards.
4-12 EIA color code example.
Section 9 figures are located near their associated diagrams on the foldout pages.
9-1
9-2
9-3
9-4
9-5
9-6
9-7
9-8
Semiconductor lead configurations.
Power Supply test points and adjustment locations.
Side Panel adjustment locations.
A/D Converter circuit board adjustment locations.
Block Diagram.
A1 Attenuator circuit board (grid locator).
A2 Function circuit board (grid locator).
A1 Attenuator circuit board voltage and waveform test points.
PAGE
vi
1-10
2-1
2-2
2-3
2-3
2-4
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-12
4-2
4-3
4-4
4-4
4-7
4-8
4-9
4-11
4-11
4-12
4-14
4-16
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FIGURE NO.
9-9
9-10
9-11
9-12
9-13
9-14
9-15
9-16
9-17
9-18
9-19
9-20
9-21
9-22
9-23
9-24
TABLE NO.
1-1
1-2
1-3
1-4
1-5
1-6
2-1
3-1
4-1
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11
LIST OF ILLUSTRATIONS (CONT.)
A2 Function circuit board voltage and waveform test points.
A2 Function circuit board (grid locator)
A2 Function circuit board voltage and waveform test points.
A3 A/D Converter circuit board (grid locator)
A3 A/D Converter circuit board voltage and waveform test points.
A4 Amplifier circuit board (grid locator)
A1 Attenuator circuit board (grid locator)
A4 Amplifier circuit board voltage and waveform test points.
A5 Power Supply circuit board (grid locator).
A6 Secondary Power Supply circuit board (grid locator).
A5 Power Supply circuit board voltage and waveform test points.
A6 Secondary Power Supply voltage and waveform test points.
A5 Power Supply circuit board (grid locator).
A5 Power Supply circuit board voltage and waveform test points.
A4 Amplifier circuit board voltage and waveform test points.
Troubleshooting Chart.
LIST OF TABLES
Digital Multimeter Electrical Specifications
Oscilloscope Electrical Specifications
Power Requirements
Common Isolation Protection
Environmental
Physical
Battery Charge Capacity
NAND Gate Logic Chart
Power Supply Operating Tolerances
Vertical Deflection Accuracy
Sweep Timing Accuracy
Sweep Linearity
DC Voltage Measurement Accuracy
DC Current Measurement Accuracy
Resistance Measurement Accuracy
RMS Voltage Measurement Accuracy
RMS Current Measurement Accuracy
Equipment Required
Power Supply Voltage Tolerance
Vertical Deflection Accuracy
Sweep Timing Accuracy
Sweep Linearity
DC Voltage Measurement Accuracy
DC Current Measurement Accuracy
Resistance Measurement Accuracy
RMS Voltage Measurement Accuracy
Alternate RMS Voltage Measurement Accuracy
RMS Current Measurement Accuracy
PAGE
1-1
1-5
1-8
1-9
1-9
1-10
2-5
3-1
4-16
5-3
5-5
5-6
5-8
5-8
5-8
5-9
5-9
6-2
6-5
6-8
6-11
6-11
6-14
6- 14
6-15
6-16
6-17
6-17
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213 Service
213 DMM Oscilloscope
vi
£. 213DMM
fl --
1
1481•5
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Section 1-213 Service
SPECIFICATIONS
The 213 DMM Oscilloscope is a portable measurement instrument that is designed to be used as either a digital multimeter or
an oscilloscope. Function selection is made with a front-panel pushbutton switch. Voltage measurements are made with the
integral high-impedance probe, while current and resistance measurements are made through a low-impedance banana jack in-
put on the side panel. Operating power is provided by internal rechargeable batteries or from power-line voltage. An integral
battery charger recharges the batteries whenever the instrument is connected to the power lin~.
The digital multimeter measures ac or de voltage and current, and resistance. It features true rms responding circuitry when
making ac voltage or current measurements. Full scale measurement ranges are 0.1 to 1000 V, 0.1 to 1000 mA, and 1 kn to
10 Mn with a 200% full scale overrange on all ranges except 1000 V. The crt readout is a 3½-digit display containing an auto-
matic polarity indicator, and a decimal point which is positioned by the range selector switch. Overrange is indicated by an
unblanked readout display consisting of scrambled character segments.
The oscilloscope function provides a single channel, de to 1 MHz vertical deflection system with calibrated deflection factors
of 5 mV to 100 V /division with a reduced bandwidth of de to 400 kHz on the 5 mV and 10 mV ranges. Current deflection
factors are 5 µA to 100 mA/division from de to 400 kHz with a reduced bandwidth of de to 200 kHz on the 5 µA and 10 µAl
division ranges. The horizontal deflection system provides calibrated sweep rates from 0.5 s to 2 µs/division, with a variable
sweep magnifier that provides uncalibrated sweep rates to at least 5 times faster than the selected rate. The trigger input is
either internal or external and provides stable triggering over the full bandwidth of the vertical defl~ction system. The oscillo-
scope crt display is a 6 x 10 division graticule with each division approximately 0.2 inches (0.5 cm).
The following instrument specifications apply over an ambient temperature range of -15° C to +55° C unless otherwise speci-
fied. Warm up time for specified accuracies is 10 minutes. If the instrument is already stabilized at the ambient temperature,
warm up time is 10 seconds.
TABLE 1-1
Digital Multimeter Electrical Specifications
Characteristic Performance Requirement
DC AND RMS VOLTS
Range 0.1 V
to 1000 V
Resolution 100 µVat 0.1 V full scale (reading must be at least 10% of
full scale)
Input Resistance
10 Mn within 1%
Input Capacitance
0.1 V to 10 V Approximately 150 pF
100 V to 1000 V
Approximately 100 pF
Input Leakage Current
200 pA max at 30°C or less with 2 mV or less change from
open to shorted probe
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Specifications-213 Service
TABLE 1-1 (continued)
Digital Multimeter Electrical Specifications
Characteristic Performance Requirement
Max Safe Input Voltage Ac component 1 MHz or
less
0.1 V to 10 V
De Coupled 500 V
(de + peak ac).
Ac Coupled 800 V
(de+ peak ac). Max
ac component is 500 V peak
100 V and 1000 V 800 V
(de+ peak ac)
DC VOLTS
Accuracy (+20°C to +30°C, batteries only)
NOTE
When operating on power-line voltage, add 10°C
to the ambient temperature for internal heating
before computing accuracy
0.1 V Within 0.1%
of reading ±3 counts. Temp Coef is (within
0.015% of reading+ 0.04% of full scale) per °C
1 V
Within 0.1% of reading ±1 count. Temp coef is (within
0.01% of reading+ 0.01% of full scale) per °C
10 V and 100 V Within 0.15%
of reading ±1 count. Temp Coef is (within
0.015% of reading+ 0.01% of full scale) per °C
1000 V Within 0.2%
of reading ±1 count. Temp Coef is (within
0.02% of reading+ 0.01% of full scale) per °C
Settling Time 1.5 seconds
for reading within 0.1 %
Normal Mode Rejection Ratio
-60 dB at 60 Hz, -3 dB at 1 Hz
RMS VOLTS
Temp Coef is (within 0.05% of reading+ 0.1% of full scale)
per °C
Accuracy (+20°C to +30°C, batteries only)
NOTE
When operating on power-line voltage, add 10°C
to the ambient temperature for internal heating
before computing accuracy
NOTE
Within% of reading shown ±5 counts at frequency shown:
Crest factor< 2 and reading at least 10% of
40 Hz 1 kHz
full scale. Accuracy limits increase linearly
for crest factor over 2; up to twice indicated
to to
limits for crest factor of 5
De 1 kHz 40 kHz
0.1 V 2.5% 1.5% 3.5%
1 V 2%
1% 1%
10 V
2%
1%
5%
100 V
2%
1% 1%
1000 V
2%
1% 5%
1-2 REV APR 1988