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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 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.
{{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
Image:Tektronix 213DMM Attenuator and Input Amplifier.jpg
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>


===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}}




</gallery>
[[Category:200 series scopes]]
[[]]

Latest revision as of 14:21, 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 213

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

  • Tek 213 front

    Tek 213 front

  • In DMM mode

    In DMM mode

  • Tek 214 (top), 213 (center) and 211 (bottom) stacked

    Tek 214 (top), 213 (center) and 211 (bottom) stacked

  • Tek 213 size comparison with 500 series plug-in bay (in a 585)

    Tek 213 size comparison with 500 series plug-in bay (in a 585)

  • 213 with pouch

    213 with pouch

  • right side

    right side

  • without covers, bottom/left

    without covers, bottom/left

  • without covers, left

    without covers, left

  • without covers, top

    without covers, top

  • without covers, operating, top/right

    without covers, operating, top/right

  • 213_amplifier_board

    213_amplifier_board

  • 213_bottom_view

    213_bottom_view

  • 213_closeup_CRT_drive

    213_closeup_CRT_drive

  • Plastic case halves

    Plastic case halves

  • Original battery, corroded

    Original battery, corroded

  • In DMM mode

    In DMM mode

  • In scope mode

    In scope mode

  • Catalog image, front

    Catalog image, front

  • Catalog image, side

    Catalog image, side

Schematics

  • Attenuator and Input Amplifier Schematic

    Attenuator and Input Amplifier Schematic

  • GM and RMS Converter Schematic

    GM and RMS Converter Schematic

  • Battery Charger and Power Supply Schematic

    Battery Charger and Power Supply Schematic

  • HV and CRT Schematic

    HV and CRT Schematic

  • A-D Converter and Character Generator Schematic

    A-D Converter and Character Generator Schematic

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 • 606A • 607 • 624 • SC501 • R7912
155-0114-00 155-0114-00 Monolithic integrated circuit character generator 213
2N5060 151-0503-00 Discrete component 30 V, 0.8 A thyristor (SCR) CG551AP • C50 • C51 • C52 • C53 • C70 • DC505 • DC505A • DC508 • DC508A • 1240 • 1241 • 212 • 213 • 214 • 4014 • 4015 • 4025 • 4027 • 4105 • 4106 • 4107 • 4109 • 4111 • 450 • 4623 • 4631 • 4632 • 4633A • 485 • 5D10 • 5223 • 7D10 • 7D11 • 7L12 • 7L13 • 7L14 • 7L18 • 7912AD • 91HS8
Mostek MK5007 156-0409-00 Monolithic integrated circuit four-decade BCD counter with latches and output multiplexer 213 • DC505 • DC505A
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