7D13

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Tektronix 7D13
3 1/2 digit Digital Multimeter
7D13 front view

Compatible with 7000-series scopes

Produced from 1971 to 1987

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The Tektronix 7D13 is a digital multimeter plug-in for 7000-series scopes with CRT readout. It will function in any compartment.

The input section is galvanically isolated, allowing the input to float ±1500 volts with respect to chassis ground.

Specifications

Functions DC Volts, DC Current, Resistance, Temperature
Voltage Ranges 1.999 V, 19.99 V, 199.9 V, 1000 V (max. 500 V via P6058)
Input impedance 10 MΩ
Current ranges 1.999 mA, 19.99 mA, 199.9 mA, 1999 mA
Resistance ranges 199.9 Ω, 1999 Ω, 19.99 kΩ, 199.9 kΩ, 1999 kΩ
Temperature 7D13: -55 °C to +125 °C, requires P6058 voltage/temperature probe or P6430 temperature probe
7D13A: requires P6601 PT-100 probe

Internals

The 7D13 consists of an analog pulse width modulator front-end built with 741 op amps and dual FETs, and a 3½ digit counter section using standard 74xx TTL parts which is interfacing with the readout system (through a 155-0038-00 D/A converter). The front end is isolated by transformers used for pulses and a floating ±15 V supply. The Probe jack for the P6058 has contacts for the temperature sensor (a diode-connected transistor) as well as the voltage input terminals.

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