DM501

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Tektronix DM501
4½ digit True RMS (DM501A only) multimeter
Tektronix DM501

Compatible with TM500 system

Produced from 1972 to 1984

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix DM501 is a 4½ digit True RMS (DM501A only) multimeter plug-in for the TM500 system.

It also has a temperature input, requiring the P6058 or P6430 temperature probe (DM501A: P6601 PT-100 probe).

The DM501 MOD718D variant replaced the temperature range with a 200 mV input range providing 10 μV resolution (see Physical Measurements Handbook).


Specifications

Specification according to manual, see discussion page
Range DM501 (15°C...35°C) DM501A (18°C...28°C)
Accuracy DC Voltmeter
200  mVDC N/A 0.05% + 0.015% FS
2  VDC 0.1% + 0.01% FS 0.05% + 0.01% FS
20  VDC 0.1% + 0.01% FS 0.05% + 0.01% FS
200  VDC 0.1% + 0.01% FS 0.05% + 0.01% FS
1000 VDC 0.1% + 0,02% FS 0.05% + 0.02% FS
Charactersitics DC Voltmeter
Input Resistance 10 MΩ
CMRR >100dB at DC; 80dB at 60Hz; 1  kΩ unbal. >100dB at DC; 80dB at 50 & 60 Hz; 1  kΩ unbal.
NMRR ≥30dB at 60Hz +20dB/decade 60dB at 50Hz or 60 Hz +0.2 Hz
Accuracy AC Voltmeter 40 Hz ... 10 kHz Sine Wave True RMS
200 mVAC N/A 0.6% + 0.05% FS True RMS
2 VAC 0.7% +0.01% FS @ sine wave 0.6% +0.05% FS True RMS
20  VDC 0.7% +0.01% FS @ sine wave 0.6% +0.05% FS True RMS
200  VDC 0.7% +0.01% FS @ sine wave 0.6% +0.05% FS True RMS
500  VDC 0.7% +0.01% FS @ sine wave 0.6% +0.2% FS True RMS
Charactersitics AC Voltmeter
Input Impedance 10 MΩ paralleled by <70 pF 10 MΩ paralleled by 160 pF
CMRR Unknown 60dB @ 50Hz and 60Hz with 1 kΩ unbalance
Accuracy Ohmmeter
200 Ω N/A 0.15% + 0.015% FS @ 1 mA
2 kΩ 0.3% + 0.01% FS @ 1 mA 0.15% + 0.015% FS @ 0.1/ 1 mA
20 kΩ 0.3% + 0.01% FS @ 0.1 mA 0.15% + 0.015% FS @ 10/ 100 µA
200 kΩ 0.3% + 0.01% FS @ 10 μA 0.15% + 0.015% FS @ 1/ 10 µA
2 MΩ 0.3% + 0.01% FS @ 1 µA 0.15% + 0.015% FS @ 1 µA (0.3%+0.015%FS @ 0.1 µA)
20 MΩ 0.5% + 0.01% FS @ 0.1 µA 0.5% + 0.015% FS @ 0.1 µA
Accuracy DC Ammeter
200 µA N/A 0.2%0.015%FS @ 1 kΩ
2 mA 0.2%+0.05%FS @ 100.1 Ω 0.2%0.015%FS @ 100 Ω
20 mA 0.2%+0.05%FS @ 10.1 Ω 0.2%0.015%FS @ 10.2 Ω
200 mA 0.2%+0.05%FS @ 1.1 Ω 0.2%0.015%FS @ 1.2 Ω
2000 mA 0.2%+0.05%FS @ 0.2 Ω 0.2%0.015%FS @ 0.4 Ω
Accuracy AC Ammeter 40 Hz...1 kHz sine wave 20 Hz...10 kHz sine wave / Imeas>5%FS
200µA N/A 0.6%+0.05%FS @ 1 kΩ
2 mA 0.6%+0.01%FS @ 100.1 Ω 0.6%+ 0.05% FS @ 100 Ω
20 mA 0.6%+0.01%FS @ 10.1 Ω 0.6%+ 0.05% FS @ 10.2 Ω
200 mA 0.6%+0.01%FS @ 1.1 Ω 0.6%+ 0.05% FS @ 1.2 Ω
2000 mA 0.6%+0.01%FS @ 0.2 Ω 0.6%+ 0.05% FS @ 0.4 Ω
Accuracy Temperature P6058 Probe (VBE) P6601 (PT100) Probe calibrated to instrument
-62°C...-55°C N/A ±2°C (±4°C any probe, uncal.)
-55°C...125°C ±1.5°C ±2°C (±4°C any probe, uncal.)
125°C...150°C ±2.5°C ±2°C (±4°C any probe, uncal.)
150°C...240°C N/A +0°C/-6°C (+2°C/-8°C any probe, uncal.)

Pictures

DM501

DM501A