# Keithley DMM6500 6½-Digit Bench/System Digital Multimeter (Pre-Owned) # Keithley DMM6500 6½-Digit Bench/System Digital Multimeter (Pre-Owned) ## Key Features At A Glance - 15 measurement functions including capacitance, temperature (RTD, thermistor, thermocouple), diode, and digitizing - 25 PPM basic DCV accuracy at 1 year and 30 PPM at 2 years; two-year specifications support longer calibration cycles - 5-inch (12.7 cm) capacitive multi-touch color TFT touchscreen with graphical display for waveform analysis - Expanded measurement ranges spanning 10 pA to 10 A and 1 mΩ to 100 MΩ - Built-in 1 MS/sec 16-bit digitizer captures voltage or current transients without a separate instrument - Standard USB-TMC and LXI/Ethernet; optional user-installable GPIB, TSP-Link, and RS-232 interfaces - Large internal memory stores up to 7 million readings - SCPI, TSP scripting, plus Keithley 2000 and Keysight 34401A SCPI emulation language modes; three-year warranty The DMM6500 is a 6½-digit bench/system digital multimeter built around a large 5-inch (12.7 cm) capacitive touchscreen that lets users observe, interact with, and explore measurements with pinch-and-zoom simplicity. Beyond the display, it delivers analog measurement performance of 25 PPM basic DCV accuracy for one year and 30 PPM for two years, with two-year specifications that can potentially allow extended calibration cycles. The instrument is equipped with 15 measurement functions, including capacitance, temperature via RTD, thermistor, and thermocouple, diode test with variable current sources, and up to 1 MS/sec digitizing. The digitizing function works for voltage or current and is especially useful for capturing transient anomalies or profiling power events such as the operating states of battery-operated devices. With a scanner card slot supporting up to 10 channels of switching, the unit also addresses multi-channel and scanning applications where a series of automated measurements is required. ValueTronics stocks instruments like the DMM6500 in our own 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit we sell is inspected and functionally verified in-house by our technicians before it ships, while new units leave factory-sealed exactly as received from the manufacturer. That combination of real inventory on our shelves and real verification on used equipment is what separates working directly with ValueTronics from ordering through an intermediary. ## Brand Heritage The DMM6500 is a Keithley-branded instrument; Keithley Instruments was acquired by Danaher Corporation in 2010 and integrated alongside Tektronix, and both brands moved to Fortive Corporation when Fortive was spun off from Danaher in 2016. The datasheet accordingly carries both the Keithley product identity and the Tektronix corporate trademark. ## Accessories Supplied - 1757 Pair, General Purpose Test Lead Set, 1000 V Cat II - USB-B-1 USB Cable, Type A to Type B, 1 m (3.3 ft.) - Traceable Calibration Certificate - Three-Year Warranty ## Product Core & Specifications Specification Value DC Voltage Accuracy (1 Year, TCAL ±5°C) ±(% of reading + % of range) 100 mV range (100 nV res; >10 GΩ or 10 MΩ ±1%) 0.0030 + 0.0035 1 V range (1 μV res; >10 GΩ or 10 MΩ ±1%) 0.0025 + 0.0006 10 V range (10 μV res; >10 GΩ or 10 MΩ ±1%) 0.0025 + 0.0005 100 V range (100 μV res; 10 MΩ ±1%) 0.0040 + 0.0006 1000 V range (1 mV res; 10 MΩ ±1%) 0.0040 + 0.0006 DC Voltage Characteristics Overrange 20% on 100 mV, 1 V, 10 V, and 100 V. 1% on 1000 V ADC Linearity (10 V range) 0.0001% of 10 V range Input Impedance (100 mV to 10 V Ranges) Selectable: (>10 GΩ or 10 MΩ ±1%) in parallel with <400 pF Input Impedance (100 V to 1000 V Ranges) 10 MΩ ±1% in parallel with <400 pF Input Bias Current <50 pA at 23°C Common Mode Current <600 nA peak-peak at 50 Hz or 60 Hz Earth Isolation 500 Vpeak >10 GΩ and <300 pF any terminal to chassis Common Mode Voltage 500 Vpeak LO terminal to chassis maximum Input Protection Input HI 1100 V, Sense HI (SHI) and Sense LO (SLO) 350 V referenced to LO Resistance Accuracy (1 Year, TCAL ±5°C) ±(% of reading + % of range) 1 Ω (10 mA test, 12.5 V open circuit) 0.0085 + 0.0200 10 Ω (10 mA test, 12.5 V) 0.0085 + 0.0020 100 Ω (1 mA test, 9.2 V) 0.0085 + 0.0020 1 kΩ (1 mA test, 9.2 V) 0.0075 + 0.0006 10 kΩ (100 μA test, 12.7 V) 0.0075 + 0.0006 100 kΩ (10 μA test, 12.5 V) 0.0075 + 0.0010 1 MΩ (10 μA test, 12.5 V) 0.0100 + 0.0006 10 MΩ (0.7 μA || 10 MΩ, 7.1 V) 0.0400 + 0.0010 100 MΩ (0.7 μA || 10 MΩ, 7.1 V) 0.2000 + 0.0030 Resistance Characteristics Offset Compensation Selectable on 1 Ω, 10 Ω, 100 Ω, 1 kΩ, and 10 kΩ ranges, 4-wire mode only Input Protection Input HI 1100 V, Sense HI (SHI) and Sense LO (SLO) 350 V referenced to LO DC Current Accuracy (1 Year, TCAL ±5°C) ±(% of reading + % of range) 10 μA (10 pA res; burden <0.13 V) 0.045 + 0.005 100 μA (100 pA res; <0.14 V) 0.045 + 0.005 1 mA (1 nA res; <0.17 V) 0.045 + 0.005 10 mA (10 nA res; <0.17 V) 0.020 + 0.005 100 mA (100 nA res; <0.20 V) 0.020 + 0.005 1 A (1 μA res; <0.55 V) 0.040 + 0.005 3 A (1 μA res; <1.70 V) 0.050 + 0.004 10 A (10 μA res; <0.50 V) 0.220 + 0.025 DC Current Characteristics Overrange 20% on 10 μA, 100 μA, 1 mA, 10 mA, 100 mA, and 1 A ranges; 1% on 3 A and 10 A ranges Terminal Input Protection Externally accessible 3 A, 250 V fast-acting fuse, 5 × 20 mm (FU-99-1); externally accessible 11 A and 1000 V fuse (159-0583-00) AC Voltage Accuracy (1 Year, TCAL ±5°C) ±(% of reading + % of range), ranges 100 mV / 1 V / 10 V / 100 V / 750 V 3 Hz to 5 Hz 1.00 + 0.03 5 Hz to 10 Hz 0.35 + 0.03 10 Hz to 20 kHz 0.06 + 0.03 20 kHz to 50 kHz 0.12 + 0.05 50 kHz to 100 kHz 0.60 + 0.08 100 kHz to 300 kHz 4.00 + 0.50 AC Voltage Characteristics Overrange (VRMS) 20% on 100 mV, 1 V, 10 V, and 100 V ranges. 0% for 750 V range AC Measurement Method AC-coupled digital sampling with anti-alias filter Volt\*Hertz Product ≤8 × 10⁷ V\*Hz Common Mode Rejection Ratio \>70 dB, for 1 kΩ unbalance in LO lead Input Impedance 1.1 MΩ ±2%, in parallel with <100 pF Input Protection 1100 Vpeak Maximum DCV 400 V on any ACV range AC Current Accuracy (1 Year, TCAL ±5°C) ±(% of reading + % of range) 100 μA, 3 Hz – 1 kHz 0.10 + 0.07 100 μA, >1 kHz – 10 kHz 0.15 + 0.07 1 mA, 3 Hz – 5 kHz 0.10 + 0.04 1 mA, >5 kHz – 10 kHz 0.10 + 0.04 10 mA, 3 Hz – 5 kHz 0.10 + 0.04 10 mA, >5 kHz – 10 kHz 0.10 + 0.04 100 mA, 3 Hz – 5 kHz 0.10 + 0.04 100 mA, >5 kHz – 10 kHz 0.10 + 0.04 1 A, 3 Hz – 5 kHz 0.10 + 0.04 1 A, >5 kHz – 10 kHz 0.15 + 0.06 3 A, 3 Hz – 5 kHz 0.15 + 0.06 3 A, >5 kHz – 10 kHz 0.15 + 0.06 10 A, 3 Hz – 1 kHz 0.40 + 0.06 10 A, >1 kHz – 5 kHz 1.00 + 0.07 10 A, >5 kHz – 10 kHz 1.00 + 0.07 AC Current Characteristics Overrange 20% on 100 μA, 1 mA, 10 mA, 100 mA, and 1 A ranges; 1% on 3 A and 10 A ranges AC Measurement Type AC-coupled True RMS; measures the AC component of the input; digital sampling with anti-alias filter Frequency and Period Accuracy (2 Year, TCAL ±5°C) ±(% of reading), 100 mV to 750 V 3 Hz to 10 Hz (333 ms to 100 ms) 0.100 \>10 Hz to 100 Hz (<100 ms to 10 ms) 0.030 \>100 Hz to 1 kHz (<10 ms to 1 ms) 0.010 \>1 kHz to 300 kHz (<1 ms to 3.3 μs) 0.009 Square Wave 0.008 Frequency and Period Characteristics Measurement Method Reciprocal-counting technique; AC-coupled using AC measurement functions Voltage Ranges 100 mVRMS full scale to 750 VRMS; auto or manual ranging Gate Time User definable from 2 ms to 273 ms (default 200 ms) Continuity Accuracy (2-Wire, 2 Year, TCAL ±5°C) ±(% of reading + % of range) 1 kΩ range (100 mΩ res; 1 mA test; 9.2 V open circuit) 0.010 + 0.010 Capacitance Accuracy (2 Year, TCAL ±5°C) ±(% of reading + % of range) 1 nF (0.1 pF res; 1 μA charge) 0.80 + 0.50 10 nF (1 pF res; 10 μA charge) 0.40 + 0.10 Overrange 20% on all ranges > **Important:** Input protection: Input HI 1100 V; Sense HI (SHI) and Sense LO (SLO) 350 V referenced to LO. Maximum DCV is 400 V on any ACV range. > **Important:** For specified performance, the communication accessory card slot cover or an optional KTTI interface card must be properly installed on the rear of the unit. > **Important:** Specifications are met after a 30-minute warm-up period, with autozero enabled, at a 1 PLC or 5 PLC measurement rate; for NPLC settings less than 1 PLC, add the appropriate noise error from the Measurement Noise table. > **Important:** The A99 power cord option ships the instrument with no power cord. > Recommended pairing: add the 2001-TCSCAN 9-channel thermocouple multiplexer with built-in CJC for automated thermocouple temperature scanning, or the 2000-SCAN 10-channel multiplexer for general multi-channel switching. ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 0.0 USD - 385.0 USD - **Vendor:** Keithley - **Type:** Multi Met - **Tags:** DMM6500, Inc., Keithley, Manufacturers, Meters & DAQ, Model 6500, Multimeter, Pre-Owned, product_manual_group_3, Product_used ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable With Full Data | 280.00 USD | In stock | | ISO IEC 17025 Accredited | 385.00 USD | In stock | ## Images - Keithley DMM6500 6.5 Digit Multimeter Used --- > Source: [ValueTronics](https://valuetronics.com/products/dmm6500-keithley-multimeter-used) > Updated: 2026-06-02