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The 213 Portable Oscilloscope combines a 3 1/2-digit DMM and 1MHz scope in one unit. Sweep rate of 0.4 microsec/div with x10 sweep magnifier. True RMS voltage and current measurements. Battery or AC line powered.
{{Oscilloscope Sidebar
|manufacturer=Tektronix
|series=200-series scopes
|model= 213
|summary=Miniature portable 1 MHz oscilloscope and TRMS digital multimeter
|image=Tektronix 213DMM pic 2.jpg | caption=Tektronix 213, front view
|introduced=1975 | discontinued=1988
|designers=Dave Allen;Gordon Meigs;John Pace;Jim Knowlton;Wendell Damm
|manuals=
* [[Media:070-1481-00.pdf|Tektronix 213 Service Manual, 1989 Rev.]] (OCR)
* [[Media:070-1480-00.pdf|Tektronix 213 User Manual, December 1983 Rev.]]
<small>
'''Modifications'''
* [[Media:050-0811-01.pdf|Replacement of U335 (Trigger &amp; Sweep Generator IC)]]
</small>
}}
The '''Tektronix 213''' is a miniature portable oscilloscope [[introduced in 1975]]. 
It combines a -digit DMM and a 1 MHz single channel scope in one unit.  
The maximum sweep rate is 0.4 μs/div with ×10 sweep magnifier.  


The 213 provides true RMS voltage and current measurements.
It is battery or AC line powered.
The 213 "Miniscope" was developed by a group led by [[Dave Allen]], including [[John Pace]], [[Gordon Meigs]], [[Wendell Damm]], [[Jim Knowlton]] (power supply) and others.
{{BeginSpecs}}
{{SpecGroup | ''Multimeter Section''  }}
{{Spec | DC Volts | 0.1 V to 1000 V,  Input Resistance: 10 MΩ <br />Accuracy,  0.1 V & 1 V:  ±0.1%, ±3 counts; 10 V & 100 V: ±0.15%, ±1 count; 1000 V: ±0.2%, ±1 count}}
{{Spec | True RMS Volts | DC Volts | 0.1 V to 1000 V,  Input Resistance: 10 MΩ <br />Accuracy, 0.1 V: ±2.5% (DC); ±1.5% (40 Hz – 4 kHz); ±3.5% (4 kHz – 40 kHz);  1, 10, 100 V:  ±2% (DC); ±1% (40 Hz – 40 kHz); 1000 V:  ±2% (DC); ±1% (40 Hz – 4 kHz); ±2% (4 kHz – 40 kHz) }}
{{Spec | DC Current | 0.1 to 1000 mA <br />Accuracy: 0.1 mA:  ±0.5%, ±3 counts; 1 mA – 1000 mA: ±0.25%, ±3 counts }}
{{Spec | True RMS Current | 0.1 to 1000 mA <br />Accuracy, 0.1 mA:  ±2.5%, ±5 counts (DC); ±1.5%, ±5 counts (40 Hz – 4 kHz); ±4.5%, ±5 counts (4 kHz − 40 kHz);  1 mA – 1000 mA: ±2.5%, ±5 counts (DC); ±1.5%, ±5 counts (40 Hz – 4 kHz); ±3.5%,±5 counts (4 kHz − 40 kHz) }}
{{Spec | Current range input resistance | 0.1 mA: 1000 Ω; 1 mA: 100 Ω; 10 mA: 10.2 Ω; 100 mA: 1.2 Ω; 1000 mA: 0.3 Ω }}
{{Spec | Resistance | 1 KΩ: ±0.5%, ±3 counts; 10 KΩ – 1 MΩ:  ±0.5%, ±1 count; 10 MΩ: ±1%, ±1 count }}
{{SpecGroup | ''Oscilloscope Section'' }}
{{Spec | Voltage ranges | 5 mV/Div to  – 100 V/Div, ±3% }}
{{Spec | Bandwidth (Voltage) | DC – 1 MHz (at 10 mV/Div and below, 400 kHz) }}
{{Spec | Current ranges | 5 µA/Div to 100 mA/Div, ±3% }}
{{Spec | Bandwidth (Current) | DC – 200 kHz (5 µA/Div – 10 μA/Div); DC – 400 kHz (20 μA/Div – 200 mA/Div) }}
{{Spec | Input resistance | 10 MΩ // 150 pF (5 mV/Div – 1 V/Div), 100 pF (2 V/Div to – 100 V/Div) }}
{{Spec | Rise time |  875 ns (5 mV/Div – 10 mV/Div); 350 ns (20 mV/Div – 100 V/Div) }}
{{Spec | Sweep |  500 ms/Div – 2 µs/Div, ±5% (magnified or unmagnified) }}
{{Spec | Batteries |  2 &times; “D” NiCd cells }}
{{Spec | Operating time | 3.5 hours typical at maximum intensity after full charge cycle}}
{{Spec | Charge time | 16 h}}
{{Spec | Mains power | 90 – 136 V<sub>AC</sub>. 48 – 62 Hz (Option 1: 180 – 250 V<sub>DC</sub>. or 180 – 250 V<sub>AC</sub>, 48 – 62 Hz) }}
{{Spec | Power consumption |  Less than 8 watts }}
{{EndSpecs}}
==Links==
* [https://vintagetek.org/birth-of-the-miniscope-by-david-allen/ David Allen, ''The Birth of the Miniscope''] @ VintageTek.org
<!-- * [https://w140.com/kurt/tek_new_products_mar-apr_1975.pdf New Products Mar/Apr 1975]  broken link -->
* [https://www.eevblog.com/2014/06/11/eevblog-628-tektronix-213-vintage-portable-oscilloscope-teardown/ EEVblog #628 – Tektronix 213 Vintage Portable Oscilloscope Teardown Video] and [https://www.flickr.com/photos/eevblog/14394189202/ Photo Set]
* [https://www.youtube.com/watch?v=fPmQ9Ce4TL0 Tektronix 213 DMM Repair Progress video]
{{Documents|Link=213}}
==Prices==
{| class="wikitable"
|-
! Year
! 1976
! 1977
! 1980
! 1982
! 1986
|-
! Catalog Price
| $1,200
| $1,425
| $1,750
| $2,100
| $2,830
|-
! In 2023 Dollars
| $6,500
| $7,200
| $6,500
| $6,700
| $7,900
|}
==Internals==
The 213 makes use of two Tek-made custom chips, the [[155-0048-01]] trigger sweep circuit, and the [[155-0114-00]] 7-segment character generator in the DVM circuit.  In addition, it includes some standard opamps (741, 324) and a 4-digit decimal counter ([[Mostek MK5007]]).
==Pictures==


<gallery>
<gallery>
[[Image:Tektronix 213DMM pic 1.jpg]]
Tek213-front-1.jpg | Tek 213 front
[[Image:Tektronix 213DMM pic 2.jpg]]
Tektronix 213DMM pic 2.jpg|In DMM mode
200 series compared.jpg | Tek [[214]] (top), [[213]] (center) and [[211]] (bottom) stacked
213 compared to 585.jpg | Tek 213 size comparison with 500 series plug-in bay (in a [[585]])
213-Stefan-140333.jpg | 213 with pouch
213-Stefan-140342.jpg | right side
213-Stefan-162337.jpg | without covers, bottom/left
213-Stefan-162344.jpg | without covers, left
213-Stefan-162352.jpg | without covers, top
213-Stefan-172313.jpg | without covers, operating, top/right
213_amplifier_board.jpg | 213_amplifier_board
213_bottom_view.jpg | 213_bottom_view
213_closeup_CRT_drive.jpg | 213_closeup_CRT_drive
213-Stefan-162409.jpg | Plastic case halves
213-Stefan-162419.jpg | Original battery, corroded
213-Stefan-162428.jpg
213-Stefan-162443.jpg
213-Stefan-172154.jpg | In DMM mode
213-Stefan-172309.jpg
213-Stefan-172243.jpg | In scope mode
213-Stefan-172258.jpg
Tektronix 213DMM pic 1.jpg    | Catalog image, front
Tektronix 213DMM side view.jpg | Catalog image, side
</gallery>
</gallery>
===Schematics===
<gallery>
Tektronix 213DMM Attenuator and Input Amplifier.jpg|Attenuator and Input Amplifier Schematic
Tektronix 213DMM GM and RMS Converter.jpg|GM and RMS Converter Schematic
Tektronix 213DMM Battery Charger and Power Supply.jpg|Battery Charger and Power Supply Schematic
Tektronix 213DMM HV and CRT.jpg|HV and CRT Schematic
Tektronix 213DMM A-D Converter and Character Generator.jpg|A-D Converter and Character Generator Schematic
</gallery>
==Components==
{{Parts|213}}
[[Category:200 series scopes]]

Latest revision as of 15:21, 27 October 2023

Tektronix 213
Miniature portable 1 MHz oscilloscope and TRMS digital multimeter
Tektronix 213, front view

Produced from 1975 to 1988

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 213 is a miniature portable oscilloscope introduced in 1975. It combines a 3½-digit DMM and a 1 MHz single channel scope in one unit. The maximum sweep rate is 0.4 μs/div with ×10 sweep magnifier.

The 213 provides true RMS voltage and current measurements. It is battery or AC line powered.

The 213 "Miniscope" was developed by a group led by Dave Allen, including John Pace, Gordon Meigs, Wendell Damm, Jim Knowlton (power supply) and others.

Key Specifications

     — Multimeter Section
DC Volts 0.1 V to 1000 V, Input Resistance: 10 MΩ
Accuracy, 0.1 V & 1 V: ±0.1%, ±3 counts; 10 V & 100 V: ±0.15%, ±1 count; 1000 V: ±0.2%, ±1 count
True RMS Volts DC Volts
DC Current 0.1 to 1000 mA
Accuracy: 0.1 mA: ±0.5%, ±3 counts; 1 mA – 1000 mA: ±0.25%, ±3 counts
True RMS Current 0.1 to 1000 mA
Accuracy, 0.1 mA: ±2.5%, ±5 counts (DC); ±1.5%, ±5 counts (40 Hz – 4 kHz); ±4.5%, ±5 counts (4 kHz − 40 kHz); 1 mA – 1000 mA: ±2.5%, ±5 counts (DC); ±1.5%, ±5 counts (40 Hz – 4 kHz); ±3.5%,±5 counts (4 kHz − 40 kHz)
Current range input resistance 0.1 mA: 1000 Ω; 1 mA: 100 Ω; 10 mA: 10.2 Ω; 100 mA: 1.2 Ω; 1000 mA: 0.3 Ω
Resistance 1 KΩ: ±0.5%, ±3 counts; 10 KΩ – 1 MΩ: ±0.5%, ±1 count; 10 MΩ: ±1%, ±1 count
     — Oscilloscope Section
Voltage ranges 5 mV/Div to – 100 V/Div, ±3%
Bandwidth (Voltage) DC – 1 MHz (at 10 mV/Div and below, 400 kHz)
Current ranges 5 µA/Div to 100 mA/Div, ±3%
Bandwidth (Current) DC – 200 kHz (5 µA/Div – 10 μA/Div); DC – 400 kHz (20 μA/Div – 200 mA/Div)
Input resistance 10 MΩ // 150 pF (5 mV/Div – 1 V/Div), 100 pF (2 V/Div to – 100 V/Div)
Rise time 875 ns (5 mV/Div – 10 mV/Div); 350 ns (20 mV/Div – 100 V/Div)
Sweep 500 ms/Div – 2 µs/Div, ±5% (magnified or unmagnified)
Batteries 2 × “D” NiCd cells
Operating time 3.5 hours typical at maximum intensity after full charge cycle
Charge time 16 h
Mains power 90 – 136 VAC. 48 – 62 Hz (Option 1: 180 – 250 VDC. or 180 – 250 VAC, 48 – 62 Hz)
Power consumption Less than 8 watts

Links

Documents Referencing 213

Document Class Title Authors Year Links
Tekscope 1975 V7 N1.pdf Article A Hand-held DMMiniscope Dave Allen 1975

Prices

Year 1976 1977 1980 1982 1986
Catalog Price $1,200 $1,425 $1,750 $2,100 $2,830
In 2023 Dollars $6,500 $7,200 $6,500 $6,700 $7,900

Internals

The 213 makes use of two Tek-made custom chips, the 155-0048-01 trigger sweep circuit, and the 155-0114-00 7-segment character generator in the DVM circuit. In addition, it includes some standard opamps (741, 324) and a 4-digit decimal counter (Mostek MK5007).

Pictures

Schematics

Components

Some Parts Used in the 213

Part Part Number(s) Class Description Used in
151-0261-00 151-0261-00 Discrete component dual PNP transistor AM501 AM502 CG5001 CG551AP FG501 FG502 FG503 OF150 OF151 OF152 OF235 OS261 RM502A R1140 R5030 R5031 R7912 067-0679-00 067-0807-00 1101 1140A 1141 1142 1350 145 1450 1480 1481 1482 1485 1501 1801 1900 1910 1980 213 26A1 26A2 2620 285 3A9 3A10 3S1 3S2 3S5 3S6 432 434 4501 454 4601 4602 4610 4612 4620 4632 4634 4701 475 492 492A 492AP 494 494P 496 496P 5A13N 5A20N 5A21N 5A22N 5A26 5L4N 502A 5030 5031 576 690SR 7A22 7A29 7B51 7B71 7J20 7L5 7S11 7S12 7912AD
154-0696-00 154-0696-00 CRT CRT 213
155-0048-01 155-0048-00 155-0048-01 155-0055-00 155-0055-01 Monolithic integrated circuit trigger sweep 211 212 213 214 432 433 5B12N 5B13N 5L4N 603 604 605 606 607 624 SC501 R7912
155-0114-00 155-0114-00 Monolithic integrated circuit character generator 213
Mostek MK5007 156-0409-00 Monolithic integrated circuit four-decade BCD counter with latches and output multiplexer 213 DC505 DC505A