# Keithley 2001-TCSCAN 9-Channel Thermocouple/General Purpose Scanner Card # Keithley 2001-TCSCAN 9-Channel Thermocouple/General Purpose Scanner Card ## Key Features At A Glance - Plug-in scanner cards for Keithley 2000, 2001, 2002, and 2010 multimeters — integrates switching and measurement in a single instrument - 2000-SCAN: 10 channels of 2-pole relay input, configurable as 5-channel 4-pole - 2001-SCAN: 8 relay channels plus 2 solid-state channels enabling high-speed ratio and delta measurements - 2001-TCSCAN: 9 analog channels with built-in cold-junction reference for thermocouple measurements - Contact potential typically less than 500 nV per contact (1 µV maximum) for measurement integrity on low-level signals - Thermocouple scan speed up to 43 channels/second at 1°C resolution (2001-TCSCAN) - Screw terminal connections accept #22 AWG wire; isolation greater than 10⁹ Ω between any two terminals - Compact form factor: 21mm × 72mm × 221mm, adds 0.4 kg to host multimeter The Keithley 2000 Series Scanners are plug-in scanner cards designed to install in the back-panel option slot of Keithley Model 2000, 2001, 2002, and 2010 digital multimeters. Three card variants are available: the 2000-SCAN general-purpose 10-channel card, the 2001-SCAN high-speed multiplexing card with solid-state channels, and the 2001-TCSCAN thermocouple/general-purpose card with built-in cold-junction reference. These scanner cards transform a host multimeter into a multipoint test and measurement system suited to applications involving up to ten measurement points. Combining scan and measurement capabilities in a single instrument reduces the need for extra equipment, eliminates complexities of triggering, timing, and processing issues, and helps reduce test time. The 2001-TCSCAN supports cold-junction compensated temperature measurements alongside voltage, resistance, and frequency measurements on the same card. ValueTronics International has supplied new and pre-owned test and measurement equipment from our Elgin, Illinois facility since 1992. Every {{CONDITION}} 2000 Series Scanner card we sell is inspected by our technical staff at our 20,000 square foot warehouse at 1675 Cambridge Drive before it leaves the building. Customers reach a live test equipment specialist by phone and receive the same instrument they were quoted — with the condition, accessories, and documentation confirmed in writing. ## Brand Heritage Keithley Instruments was founded in Cleveland, Ohio in 1946 and built its reputation on precision low-level electrical measurement instruments. Keithley was acquired by Danaher Corporation in 2010, joining Tektronix in the same portfolio. In 2016, Danaher's industrial businesses — including both Keithley and Tektronix — were spun off into Fortive Corporation, where the Keithley brand continues today. ## Compare Other Models in This Series The Keithley 2000 Series Scanners comprise three plug-in scanner cards — the 2000-SCAN, 2001-SCAN, and 2001-TCSCAN — that all install in the back-panel option slot of the Keithley Model 2000, 2001, 2002, and 2010 digital multimeters. The datasheet groups these three cards as a family because they share the same host-instrument compatibility, the same compact mechanical form factor, and the same screw terminal input architecture. Within the family, each card targets a different measurement focus. The 2000-SCAN is the general-purpose 10-channel relay scanner. The 2001-SCAN adds two solid-state channels to enable high-speed ratio and delta measurements. The 2001-TCSCAN trades one channel for a built-in cold-junction reference to enable thermocouple temperature measurements alongside voltage, resistance, and frequency. Each new 2000 Series Scanner card listed below is its own dedicated product page with condition-matched pricing. Click into the specific card variant that fits your application and host multimeter to see the current quote, accessories included, and availability. The 2000-SCAN is the entry point in the family: 10 channels of 2-pole relay input, configurable as 5-channel 4-pole, suited to general-purpose multiplexing into the host multimeter without the solid-state speed enhancements or thermocouple reference of the other two cards. The three cards differ in channel architecture and measurement capability. The 2000-SCAN provides ten 2-pole relay channels with no solid-state or thermocouple capability. The 2001-SCAN provides eight relay channels plus two solid-state channels, with the solid-state channels supporting DCV, ACV, and frequency measurements at faster actuation times (150 µs on / 100 µs off versus 2.5 ms for the relay channels). The 2001-TCSCAN provides nine analog channels plus a dedicated cold-junction reference channel for thermocouple work, with scan speeds up to 43 channels per second at 1°C resolution. Function coverage also differs across the family. The 2001-SCAN relay channels handle DCV, ACV, 4-wire and 2-wire resistance, RTDs, frequency, and (on two channels with user-supplied shunt resistors) DCI and ACI. The 2001-SCAN solid-state channels are limited to DCV, ACV, and frequency. The 2001-TCSCAN supports DCV, ACV, 4-wire resistance, thermocouple, 2-wire resistance, 4-wire RTD, 2-wire RTD, and frequency — mixable channel to channel. Model Channels Switching Type Signal Range **2001-TCSCAN** 9 analog input + 1 cold-junction reference Relay (2-pole) 500nV to 125V 2000-SCAN 10 (2-pole), configurable as 5 (4-pole) Relay (electromechanical) Up to 110V DC / 125V AC rms, 1A 2001-SCAN 10 (8 relay + 2 solid-state) Relay + Solid-State Hybrid 500nV to 125V; 110V DC, 1A (relay); 50mA (solid-state) Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Test Leads ## Product Core & Specifications Parameter Specification Thermocouple Accuracy (Total Absolute Error, 1 Year, with Model 2001 Multimeter) Type J Range: −100° to 760°C; Default Resolution: 0.1°C; 18°–28°C: ±0.65°C; 0°–18°C & 28°–50°C: ±1.08°C Type K Range: −100° to 1372°C; Default Resolution: 0.1°C; 18°–28°C: ±0.70°C; 0°–18°C & 28°–50°C: ±1.32°C Type T Range: −100° to 400°C; Default Resolution: 0.1°C; 18°–28°C: ±0.68°C; 0°–18°C & 28°–50°C: ±1.22°C Type E Range: −100° to 1000°C; Default Resolution: 0.1°C; 18°–28°C: ±0.67°C; 0°–18°C & 28°–50°C: ±1.11°C Type R Range: 0° to 1768°C; Default Resolution: 1.0°C; 18°–28°C: ±1.31°C; 0°–18°C & 28°–50°C: ±3.06°C Type S Range: 0° to 1768°C; Default Resolution: 1.0°C; 18°–28°C: ±1.30°C; 0°–18°C & 28°–50°C: ±3.02°C Type B Range: 350° to 1820°C; Default Resolution: 1.0°C; 18°–28°C: ±1.65°C; 0°–18°C & 28°–50°C: ±4.14°C Accuracy Notes Specifications apply to channels 2–6. Add 0.06°C for each adjacent channel away from channel 6. Extended range (Types J, K, T, E): −200.0°C to −100.1°C add ±0.1°C. Excluding thermocouple error. General Channels 9 channels of 2-pole analog input, 1 cold junction sensor Functions DCV, ACV, 4-wire Ω, Thermocouple, 2-wire Ω, 4-wire RTD, 2-wire RTD, Frequency (can be mixed from channel to channel) Thermocouple Scan Speed 25 channels/second @ 0.1°C resolution; 43 channels/second @ 1°C resolution Capabilities Multiplex one of nine 2-pole or one of four 4-pole analog signals into Model 2001 DMM and/or any combination of 2- or 4-pole analog signals Reference Output +200µV/°C (+54.63mV at 0°C) All Inputs — Maximum Signal Levels DC 110V DC, <1A switched, 30VA maximum (resistive load) AC 125V AC rms or 175V AC peak, 1A switched, 62.5VA maximum (resistive load) Contact Life \>105 operations at maximum signal level; >108 operations cold switching Contact Resistance <1Ω at end of contact life (Channels 5 and 10 maximum power = 0.25 VA maximum — factory installed 120Ω, 5%, 1/4W resistors; user may replace with jumper) Actuation Time 2.5ms maximum on/off Contact Potential <±500nV typical per contact, 1µV max (Channels 5 and 10: ±1µV typical, 2µV max) Connector Type Screw terminal, #22 AWG wire size (0.062 O.D.) Isolation Between Any Two Terminals \>109Ω, <75pF Common Mode Voltage 350V peak between any terminal and earth Maximum Voltage Between Any Two Terminals 110V DC, 125V AC rms Physical Dimensions 21mm high × 72mm wide × 221mm deep (0.83 in × 2.83 in × 8.7 in) Net Weight 283g (10 oz) **Important:** Maximum voltage between any two terminals: 200 V peak (2000-SCAN and 2001-SCAN). Maximum voltage between any terminal and Model 2001 Input LO: 200 V peak. Common mode voltage: 350 V peak between any terminal and earth.**Important:** The 2000-SCAN, 2001-SCAN, and 2001-TCSCAN are plug-in scanner cards designed for use with Keithley Model 2000, 2001, 2002, and 2010 DMMs. A compatible DMM mainframe is required and is not included with the scanner card.**Important:** Model 2000 DMM provides built-in linearization support for J, K, and T-type thermocouples only. The Model 2010 has built-in support for J, K, T, and N thermocouples. Automatic linearization of types J, K, E, R, S, B, and T thermocouples is provided only when the 2001-TCSCAN is installed in the Model 2001 or 2002.**Important:** For the 2001-TCSCAN, channels 5 and 10 are limited to 0.25 VA maximum power because of factory-installed 120Ω, 5%, 1/4W resistors. The user may replace these with jumpers; see the product manual for complete instructions.Recommended pairing: install the 2000 Series Scanner card in a Keithley Model 2000, 2001, 2002, or 2010 digital multimeter to create the multipoint measurement system described in the datasheet. **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:** 1280.0 USD - **Vendor:** Keithley - **Type:** Module - **Tags:** Card, Keithley, Manufacturers, Other Equipment, product_manual_group_1, Product_new, Switch ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1280.00 USD | In stock | ## Images - Keithley 2001-TCSCAN 9-Channel Thermocouple/General Purpose Scanner Card --- > Source: [ValueTronics](https://valuetronics.com/products/2001-tcscan-keithley-switch-card-new) > Updated: 2026-05-30