213
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.
Specifications
Digital Multimeter
Key Specifications
DC Volts | 0.1 V to 1000 V, Input Resistance: 10MΩ Accuracy, 0.1v & 1v: ±0.1%, ±3 counts; 10v & 100v: ±0.15%, ±1 count; 1000v: ±0.2%, ±1 count |
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True RMS Volts |
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Current range input resistance | 0.1mA: 1000Ω; 1mA: 100Ω; 10mA: 10.2Ω; 100mA: 1.2Ω; 1000mA: 0.3Ω |
DC Current |
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True RMS Current |
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Resistance |
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Oscilloscope
Key Specifications
Voltage ranges | 5 mV/Div to – 100 V/Div, ±3% |
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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 (5mV – 10mV/DIV); 350 ns (20mV – 100v/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
- EEVblog #628 – Tektronix 213 Vintage Portable Oscilloscope Teardown Video and Photo Set
- Tektronix 213 DMM Repair Progress video
Pictures
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In DMM mode
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Attenuator and Input Amplifier Schematic
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GM and RMS Converter Schematic
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Battery Charger and Power Supply Schematic
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HV and CRT Schematic
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A-D Converter and Character Generator Schematic