DM502: Difference between revisions

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Tek-DM502A-rear-interface.jpg|DM502A rear interface
Tek-DM502A-rear-interface.jpg|DM502A rear interface
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==Components==
{{Parts|DM502}}
{{Parts|DM502A}}


[[Category:TM500 multimeter plugins]]
[[Category:TM500 multimeter plugins]]
[[Category:Introduced in 1975]]
[[Category:Introduced in 1975]]

Revision as of 09:12, 12 October 2023

Tektronix DM502
basic 3½ digit digital multimeter
Tektronix DM502

Produced from 1975 to 1988

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

The Tektronix DM502 is a basic 3½ digit digital multimeter plug-in for the TM500 system.

It has an Int/Ext switch that allows alternate input connections via the rear interface to be selected.

The DM502 is available with an input for temperature measurement with a transistor temperature probe (P6430) using an NPN transistor, e.g. a 2N2484 (any NPN-Transistor with hFE >150 can be used).

The DM502A model adds an input for a PT-100 temperature probe (P6601), a True RMS converter, and offset circuits to read dB directly in all ranges. An "Option 2" instrument deletes the temperature measurement function, P6601 temperature probe, and all internal circuits associated with this function. The rear interface of DM502A is limited compared to the DM502: No current input and no reading output, see gallery below.

The 2 kΩ measurement range (+HI in DM502A) can be used for diode testing, since a current source of 1 mA is active and the reading corresponds to the (forward) voltage drop of the diode in Volts. The voltage can rise to a maximum of 10 V. A second voltmeter is needed to measure the voltage if 2 V are exceeded.

Key Specifications

Voltage ranges 200 mV to 200 V in decade steps; 1 kV (DC) / 500 V (AC) top range
Input impedance DM502 10 MΩ or direct JFET input >2 GΩ (by internal jumper)
Input impedance DM502A 10 MΩ
Current ranges 200 μA to 2 A in decade steps
Resistance ranges 200 Ω to 20 MΩ in decade steps

Links

Documents Referencing DM502

Document Class Title Authors Year Links
070-2088-00.pdf Book TM500 Series Rear Interface Data Book 1975 AF501 • AM501 • AM502 • DC501 • DC502 • DC503 • DC504 • DC505 • DC505A • DM501 • DM502 • FG501 • FG502 • FG503 • MR501 • PG501 • PG502 • PG505 • PG506 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • RG501 • SC501 • SC502 • SG502 • SG503 • TG501
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976 AF501 • AM501 • AM502 • AM511 • DC501 • DC502 • DC503 • DC504 • DC505 • DC505A • DD501 • DM501 • DM502 • FG501 • FG502 • FG503 • FG504 • LA501 • MR501 • PG501 • PG502 • PG505 • PG506 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • RG501 • SC501 • SC502 • SG502 • SG503 • SG504 • SW503 • TG501 • TR501 • TR502
070-2088-04.pdf Book TM500 Series Rear Interface Data Book 1985 AA501 • AF501 • AM501 • AM502 • AM503 • AM511 • DC501 • DC502 • DC503 • DC503A • DC504 • DC505 • DC505A • DC508 • DC508A • DC509 • DC510 • DC5009 • DC5010 • DD501 • DL502 • DM501 • DM501A • DM502 • DM502A • DM505 • DM5010 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • FG5010 • LA501 • LA501W • WR501 • MR501 • PG501 • PG502 • PG505 • PG506 • PG507 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • PS5010 • RG501 • SC501 • SC502 • SC503 • SC504 • SG502 • SG503 • SG504 • SG505 • SW503 • TG501 • TR501 • TR502 • MI5010 • MX5010 • SI5010

Documents Referencing DM502A

Document Class Title Authors Year Links
Tekscope 1979 V11 N2.pdf Article New Products 1979 A6701 • DM502A • DM505 • 8001 • 8002A • Telequipment D1016
Tekscope 1979 V11 N3.pdf Article A New DMM Family for the TM 500 Series Bill Mark 1979 DM501A • DM502A • DM505 • P6601
070-2088-04.pdf Book TM500 Series Rear Interface Data Book 1985 AA501 • AF501 • AM501 • AM502 • AM503 • AM511 • DC501 • DC502 • DC503 • DC503A • DC504 • DC505 • DC505A • DC508 • DC508A • DC509 • DC510 • DC5009 • DC5010 • DD501 • DL502 • DM501 • DM501A • DM502 • DM502A • DM505 • DM5010 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • FG5010 • LA501 • LA501W • WR501 • MR501 • PG501 • PG502 • PG505 • PG506 • PG507 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • PS5010 • RG501 • SC501 • SC502 • SC503 • SC504 • SG502 • SG503 • SG504 • SG505 • SW503 • TG501 • TR501 • TR502 • MI5010 • MX5010 • SI5010

Pictures

DM502

  • DM502 switch with cover off. The cover removes easily using a Pozidrive screwdriver.

    DM502 switch with cover off. The cover removes easily using a Pozidrive screwdriver.

  • DM502 rear interface

    DM502 rear interface

DM502A

  • DM502A right internal

    DM502A right internal

  • DM502A rear interface

    DM502A rear interface

Components

Some Parts Used in the DM502

Part Part Number(s) Class Description Used in
CA3046 156-0048-00 Monolithic integrated circuit transistor array 4601 • 7104 • 7403N • 7503 • 7B53A • 7D12 • DM502 • FG504 • S-52 • Telequipment D34 • 7603 • 7613 • 7623 • 7633 • FG507 • Keithley 227
Siliconix LD110/111A 156-0476-00 • 156-0476-00 • 156-1268-00 Monolithic integrated circuit 3½ digit A/D converter DM502 • DM502A • DM505


Some Parts Used in the DM502A

Part Part Number(s) Class Description Used in
120-1243-00 120-1243-00 Discrete component transformer DM502A
AD536 156-1259-00 Monolithic integrated circuit RMS/DC converter DM501A • DM502A • DM5010 • Keithley 177 • Keithley 179 • Keithley 195A
Siliconix LD110/111A 156-0476-00 • 156-0476-00 • 156-1268-00 Monolithic integrated circuit 3½ digit A/D converter DM502 • DM502A • DM505
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