DM501

Tektronix DM501
4½ digit True RMS (DM501A only) multimeter Tektronix DM501 Produced from 1972 to 1984 Manuals Tektronix DM501 Manual (PDF) Tektronix DM501A Manual (PDF, complete with schematics) Tektronix DM501A Manual (PDF, no schematics) Tektronix DM501A Schematics (PDF) (All manuals in PDF format unless noted otherwise)

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 mV_DC	N/A	0.05% + 0.015% FS
2 V_DC	0.1% + 0.01% FS	0.05% + 0.01% FS
20 V_DC	0.1% + 0.01% FS	0.05% + 0.01% FS
200 V_DC	0.1% + 0.01% FS	0.05% + 0.01% FS
1000 V_DC	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 mV_AC	N/A	0.6% + 0.05% FS True RMS
2 V_AC	0.7% +0.01% FS @ sine wave	0.6% +0.05% FS True RMS
20 V_DC	0.7% +0.01% FS @ sine wave	0.6% +0.05% FS True RMS
200 V_DC	0.7% +0.01% FS @ sine wave	0.6% +0.05% FS True RMS
500 V_DC	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 / I_meas>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 (V_BE)	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.)