7D13

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Tektronix 7D13
3½ digit Digital Multimeter
7D13 front view

Compatible with 7000-series scopes

Produced from 1971 to 1987

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 7D13 is a digital multimeter plug-in for 7000-series scopes with CRT readout. It will function in any compartment. The 7D13 was introduced in 1971 and followed by the 7D13A in 1982, which has recessed banana sockets on the front panel and is compatible with a different temperature-only probe.

There is no analog output signal presented on the CRT, therefore it is not necessary to select the 7D13 with the oscilloscope Vertical or Horizontal Mode switches.

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

Key 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
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, that interfaces 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 (a 4-pin LEMO S-series connector) has contacts for the temperature sensor (a diode-connected transistor) as well as the voltage input terminals.

Links

Documents Referencing 7D13

Document Class Title Authors Year Links
Tekscope 1971 V3 N1 Jan 1971.pdf Article Digital Counter and Multimeter 1971
Tekscope 1972 V4 N4 Jul 1972.pdf Article Tunnel Diodes: In-Circuit Testing Using the 7D13 Digital Multimeter Plug-In 1972
7000 Series Digital Plug-In Applications.pdf Application Note 7000 Series Digital Plug-In Applications 1977

Pictures

7D13

7D13A

Components

Some Parts Used in the 7D13

Part Part Number(s) Class Description Used in
155-0038-01 155-0038-00 155-0038-01 Monolithic integrated circuit 5-bit current source D/A converter 7A42 7D13 7D14 7M13 T4005


Some Parts Used in the 7D13A