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
L @
iii

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
213 Service
V

213 Service
213 DMM Oscilloscope
vi
£. 213DMM
fl --
1
1481•5
@

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
@
1-1

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

Specifications-213 Service
TABLE 1-1 (continued)
Digital Multimeter Electrical Specifications
Characteristic Performance Requirement
Settling Time 2 seconds
for reading within 1%
Max Crest Factor1
Approximately 5
DC AND RMS CURRENT
Range
0. 1 to 1000 mA
Resolution 100 nA
at 0.1 mA full scale (reading at least 10% of full
scale)
Input Shunt Resistance (Approximate)
0.1 mA
1000 n
1 mA
100 n
10mA
10.2 n
100 mA
1.2 n
1000 mA
o.3n
Max Safe Input Current 2
Arms on any scale or 3 A peak
DC CURRENT
Accuracy (+20°C to +30°C, batteries only) Temp Coef
is (within 0.02% of reading +0.04% of full scale)
per° C
NOTE
When operating on power-line voltage, add 10°C
to the ambient temperature for internal heating
before computing accuracy
0.1 mA Range
Within 0.5% of reading ±3 counts
1 mA to 1000 mA
Within 0.25% of reading ±3 counts
SettIing Ti me
1.5 seconds for reading within 0.1 %
RMS CURRENT
Accuracy (+20°C to +30° C)
Temp Coef is (within 0.05% of reading+ 0.1 % of the full
scale) per °C
NOTE
Crest factor< 2 and reading at least 10% of full
NOTE
scale. Accuracy limits increase linearly for crest When operating on power-line voltage, add 10°C
factor over 2; up to twice indicated limit for
to the ambient temperature for internal heating
crest factor of 5 before
computing accuracy
1 Supplemental
information only.
REV APR 1982 1-3

Specifications-213 Service
TABLE 1-1 (continued)
Digital Multimeter Electrical Specifications
Characteristic Performance Requirement
Within% of reading shown ±5 counts at frequency shown:
40 Hz 4 kHz
De
to to
4 kHz 40 kHz
0.1 mA 2.5% 1.5% 4.5%
1 mA to 1000 mA
2.5% 1.5% 3.5%
Max Crest Factor1
Approximately 5
Settling Time
2 seconds for reading within 1%
DC Current Rejection1
No provision for blocking de for rms reading of ac component
only
RESISTANCE
Range 1 kn to 10 Mn
Resolution 1 non 1 kn range (reading at least 10% of full scale)
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.
1 kn
Within 0.5% of reading ±3 counts. Temp Coef is (within
0.03% of reading +0.04% of full scale) per °C
10 kD to 1 Mn
Within 0.5% of reading ±1 count. Temp Coef is (within
0.02% of reading+ 0.02% of full scale) per °C
10 M~ Within 1% of reading ±1 count. Temp Coef is (within 0.05%
of reading+ 0.02% of full scale) per °C
Accidental Voltage Input Protection 125 V max on all ranges
SettIi ng Ti me 2 seconds for reading within 2 counts
Reference Current
1
Approximately 100 µA, 100 µA, 10 µA, 1 µA, and 100 nA
for ranges 1
kn through 10 Mn respectively
NOTE
The potential across the unknown resistance is
1 V per 1000 counts on the 10 kn through
10 Mn ranges and 0. 1 V per 1000 counts on the
1 kn range. This potential is negative at the
mA-n jack with reference to common.
1
Supplemental information only.
1-4
REV. A, MAR. 1975

Characteristic
READOUT DISPLAY
Number of Digits
Display Size
Sampling Rate1
Overrange Capability
Indication
Input Amplifier Overload1
A/D Converter Overload1
RMS Converter Overload1
Characteristic
Deflection Factor
Calibrated Range
Accuracy
Uncalibrated (Variable) Range
DC Balance1
Vc:iric1blc DC Shift1
Position Range (Vertical) 1
1
Supplemental information only.
@
Specifications-213 Service
TABLE 1-1 (continued)
Digital Multimeter Electrical Specifications
Performance Requirement
3½ digits plug decimal and polari ty sign
Approximately 1 cm high and 4 cm wide (5 character
display)
Approximately 7 readings per second
At least 200% of full scale
Readout displays scrambled character segments or 8's
Indicates overrange when input signal peak> 4X seJected
range
Indicates overrange when readout display exceed 2500
within 400 counts
Indicates overrange when crest factor exceeds approximately
5
TABLE 1-2
Oscilloscope Electrical Specifications
Performance Requirement
VERTICAL DEFLECTION SYSTEM
5 mV to 100 V/div
5 µA to 100 mA/div
Within 3%
Continuously variable between calibrated settings. Extends
deflection factor to at least 2.5 times the setting of the
VOL TS-mA/D IV control
/
Adjustable to 0.2 div or less trace shift between any de-
flection factors
0.8 div or less at any setting of the VOL TS-mA/D IV VAR
control
At least 10 div from crt center
1-5

Specifications-213 Service
Characteristic
Frequency Response
5 µA to 10 µA/div
20 µA to 200 mA/div
5 mV to 10 mV/div
20 mV to 100 V /div
TABLE 1-2 (continued)
Oscilloscope Electrical Specifications
Performance Requirement
VERTICAL DEFLECTION SYSTEM (cont)
De to at least 200 kHz at -3 dB
De to at least 400 kHz at -3 dB
De to at least 1 MHz at -3 dB (6 div reference centered
vertically)
Lower -3 dB point ac coupled (voltage only)
1 Hz or less
Step Response (5
div reference centered vertically; de
coupled)1
Risetime
5 mV and 10 mV/div
875 ns or less
20 mV to 100 V /div
350 ns or less
Aberrations +5%
to -2%. Total not to exceed 5% p-p
Input Resistance (Voltage) 10
MQ within 1%
Input Shunt Resistance (current)
Approximate:
5 µA to 10 µA/div
1000 n
20 µA to 100 µA/div
100 n
200 µA to 1 mA/div
10.2 n
2 mA to 10 mA/div
1.2 n
20 mA to 100 mA/div
o.3 n
Input Capacitance (Voltage)
5 mV to 1 V/div
Approximately 150 pF
2 V to 100 V/div
Approximately 100 pF
Max Safe Input Voltage
Ac component, 1 MHz or less
5 mV to 1 V/div
DC Coupled 500 V
(de+ peak ac)
AC Coupled 800 V
(de+ peak ac). Max
ac component is 500 V peak.
1 Supplemental
information only.
1-6
-,
@

Characteristics
2 V to 100 V/div
Max Safe Input Current
DC Current Rejection
1
Input Leakage Current
1
Trigger Sensitivity
Intl AC Norm
Intl AC Auto
Ext DC
Trigger Jitter
External Trigger
Input Resistance
Input Capacitance
Maximum Usable Input Voltage
1
Maximum Safe Input Voltage
1
Sweep Rate
Calibrated Range
Accuracy Over Center 8 Div
TABLE 1-2 (continued)
Oscilloscope Electrical Specifications
Specifications-213 Service
Performance Requirement
VERTICAL DEFLECTION SYSTEM (cont)
800 V (de+ peak ac)
2 A rms on any range, 3 A peak
No provision for blocking de current for ac only reading
200 pA maximum at 30°C or less (0.4 div or less trace
shift from open to shorted probe)
TRIGGERING
0.5 div, 7 Hz to 1 MHz
Same as Intl AC Norm except the sweep free-runs and
provides a bright reference trace when the vertical input
signal is not sufficient to cause triggering
1 V, de to 1 MHz
0.5 µs or less at 1 MHz
1 M.Q ± 10%
Approximately 20 pF
± 8 volts peak at 1 MHz or less
200 V (de+ peak ac)
HORIZONTAL DEFLECTION SYSTEM
500 ms to 2 µs/div
Within 5%
Linearity of Any 2 Div Portion Within Center 8 Div
Within 5% {magnified and unmagnified)
Variable Magnifier Range
Horizontal Position Range1
1 Supplemental
information only.
@
Continuously variable between calibrated settings. Extends
fastest sweep rate to at least 0.4 µs/div. Each sweep rate
magnified by at least 5: 1
Start of sweep can be positioned to the right of center; end
of sweep can be positioned to the left of center.
1-7

Specifications-213 Service
Graticule
Type
Area
Phosphor
Trace Rotation Range1
Batteries1
Characteristic
Characteristic
TABLE 1-2 (continued)
Oscilloscope Electrical Specifications
VISUAL DISPLAY
Performance Requirement
Internal black line, non-illuminated
6 x 10 div. Each div equals approximately 0.2 inch (0.5 cm)
P43 standard
Adequate to align trace with center horizontal graticule line
TABLE 1-3
Power Requirements
BATTERY OPERATION
Performance Requirement
Two rechargeable nickel-cadmium D cells
Typical Operating Time at Maximum Display Trace
Intensity After Full Charge Cycle (Charge and opera-
tion at +20°C to +30°C)
3.5 hours
Battery Condition Indicator
Deep Discharge Protection
Typical Charge Time
Standard Voltage
Option 1 Voltage
Max Power Consumption
Line Fuse1
1
Supplemental information only.
1-8
LED extinguishes when battery voltage (to common) drops
below approximately 2.12 V within 10%
Instrument operation is automatically interrupted within 4
to 10 minutes after LED extinguishes. (When battery voltage
to common drops below approximately 2 V within 0.05 V)
16 hours
POWER LINE OPERATION
90 V to 136 V, 48 to 62 Hz
180 to 250 V de or 180 to 250 V ac, 48 to 62 Hz
Less than 8 w
0.2 A
@

Characteristic
Battery Operated (Common Input to Case)
TABLE 1-4
Common Isolation Protection
Specifications-213 Service
Performance Requirement
Common input floating voltage not greater than 500 V rms
or 700 V (de+ peak ac)
Power Line Operated (Common Input to Power Line) Common input rms floating voltage plus the power line
voltage not greater than 250 V rms
Characteristic
Temperature
Operating on Batteries
Charging or Operating from Power Line
Storage
Altitude
Operating
Storage
Humidity
Operating and Storage
Vibration
Operating and Nonoperating
Shock
Operating and Nonoperating
Transportation (Packaged Instrument)
REV. A, MAR. 1975
Common input composite (de+ peak ac) floating voltage
plus 1.4 times the power line voltage not greater than 350
V peak.
TABLE 1-5
Environmental
-15°C to +55°C
0°C to +40°C
-40°C to +60°C
Performance Requirement
To 25,000 feet (maximum operating temperature decreased
by 1°C per 1,000 feet above 15,000 feet)
To 40,000 feet
80% or less relative humidity at 40°C or less
15 minutes along each of the three major axes at a total
displacement of 0.025 inch p-p (4 g's at 55 Hz) with fre-
quency varied from 10 to 55 to 10 Hz in one-minute sweeps.
Hold for three minutes at 55 Hz. All major resonances must
be above 55 Hz.
Two shor.ks at 1!10 g's, onr.-half sinr., 2 milliser.ond duration
each direction along each major axis. Total of 12 shocks.
Ou al ifies under National Safe Transit Committee test
procedure 1A.
1-9

Specifications-213 Service
Characteristic
Dimensions
Weight ( Instrument Only)
Finish
TABLE 1-6
Physical
5.35"
(135.9 mm)
Description
See Figure 1-1. Dimensional Drawing
Approximately 3.7 lb (1.7 kg)
Blue plastic case; gray plastic side panel
I
2.10" I
~ (53.3 mm)--+-
1-10
j
i
-t
1.35"
(34.3 mm)
_i
FRONT
VIEW
213 DMM
OSCILLOSCOPE
1.65" (41.9 mm)
t
•
•
3.35"
(85.1 mm)
••
•
•
•
9.05"
(229.9 mm)
-•·
-
EZ2II
•·
SIDE VIEW
Figure 1-1 . Dimensional Drawing.
l
2.95"
(74.1 mm)
t
1.65" (41.9 mm)
•
·•
•
1481 - 32
@

Section 2-213 Service
OPERATING INSTRUCTIONS
SAFETY INFORMATION
This instrument is designed to allow the input common re-
ference to float above ground. Under this condition, the
probe common clip, COMMON input jack, mA-n input jack,
EXT TR IG jack, and the power plug prongs may be at a
dangerous potential. See Table 1-4, Common Isolation
Protection in the Specifications section.
When operated on batteries, the power line plug should be
stored in the rear-panel insulated compartment. Potentials
applied to the common connectors (probe common clip or
COMMON jack) may cause small amounts of current to
flow in the power-line circuitry creating a possible shock
hazard on the plug prongs.
The probe common clip and COMMON jack are electrically
connected to each other; therefore, any potential applied
to one is present on the other creating a possible shock ha-
zard. Also, to prevent dissimilar voltages being applied to
the probe common clip and COMMON jack, which could
cause equipment damage, only one should be connected to
the circuit under test at any given time. The probe with its
common clip, and the mA-n input jack with its COMMON
jack, should not be connected simultaneously to a circuit
under test.
Personal and equipment safety precautions are used through-
out this manual and are identified as follows:
213 DMM
OSCILLOSCOPE
Personal Safety
WARNING I
Equipment Safety
CONTROLS, CONNECTORS, AND INDICATORS
Side Panel
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mA-n-Banana-jack input for current and resistance
measurements. In then mode, this jack is negative
with respect to the COMMON jack.
EXT TRIG-Banana-jack, high-impedance input for
external trigger voltage.
DC BAL-Screwdriver adjustment to adjust for mini-
mum trace shift, or change in DMM zero reading,
when switching vertical deflection factors or DMM
range.
COMMON-Banana-jack common return path for cur-
rent and resistance measurements, or as an alternate
reference point or common return when using the
voltage probe. It is el ectrically connected to the
probe common clip.
1481-35
Fig. 2-1. Side panel.
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Operating lnstructions-213 Service
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2-2
TRIGGER-This section contains the trigger mode
and level-slope controls.
EXT DC: Selects de coupled external trigger.
INTL AC NORM: Selects internal ac coupled trig-
ger signal. There is no trace when the vertical input
signal is not sufficient to cause triggering.
INTL AC AUTO: Same as INTL AC NORM ex-
cept the sweep free-runs and provides a bright
reference trace when the vertical signal.
LEVEL-SLOPE: Selects the amplitude point and
slope of the trigger signal on which the sweep is
triggered. When the control indicator dot is to the
left of center, the sweep is triggered on the positive-
going waveform. When to the right of center, the
sweep is triggered on the negative-going slope of
the trigger signal as shown by the negative-going
waveform.
HORIZ MGF VAR-Provides continuously variable
uncalibrated sweep magnification to at least 5 times
the sweep rate indicated by the SEC/DIV control.
The calibrated detent is at the fully counterclockwise
position.
TRACE ROTATE-Screwdriver adjustment to align
trace with the horizontal graticule line.
SWP CAL-Screwdriver adjustment to set the calibra-
ted sweep timing of the SEC/DIV control when the
HOR IZ MG F VAR control is in the calibrated detent.
POS (Horizontal Arrow Line)-Controls the horizon-
tal position of the oscilloscope display.
POWER- Turns instrument on and off. When the in-
strument is connected to the power line, charging
power is provided to the batteries in either position
of the switch.
INPUT COUPLING-Selects method for coupling of
input signal from voltage probe into input amplifier.
AC: Signal is capacitively coupled and the de com-
ponent is blocked.
GND: Connects the input amplifier to common to
provide a zero reference voltage without physically
disconnecting the probe from the circuit under test.
Connects the input signal to the ac coupling capa-
citor through a 10 Mn resistor which provides pre-
charging.
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DC: All components of the input signal are passed
to the input amplifier.
INTENSITY-Controls brightness of crt display.
FOCUS-Screwdriver adjustment to provide optimum
display definition.
VOL TS-mA/DIV VAR-Provides continuously varia-
ble uncalibrated deflection factors to at least 2.5
times the calibrated settings of the VOL TS-mA/DIV
control. The calibrated detent is at the fully clock-
wise position.
VERT GAIN-Screwdriver adjustment to set the cali-
bration of the VOL TS-mA/DIV control when the
VOL TS-mA/DIV control is in the calibrated detent.
POS (Vertical Arrow Line)-Controls the vertical posi-
tion of the oscilloscope display.
Front Panel
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VOL TS-Selects voltage mode for either digital multi-
meter or oscilloscope function.
RMS (OUT: DC)-DMM only. Selects true rms cir-
cuitry (button in) or ac rejection filter (button out).
Button must be in out position when measuring resis-
tance or the reading accuracy will be degraded.
DMM (OUT:SCOPE)-Selects digital multimeter func-
tion (button in) or oscilloscope function (button out).
1481-36
Fig. 2-2. Front panel.
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