The Keithley 7059 is a 10-channel low-voltage scanner card engineered for plug-in integration into Keithley Model 705 and Model 706 mainframes. It delivers high-density switching of low-level signals with minimal thermal voltage error, making it ideal for thermocouple and low-level transducer measurements in automated test systems. The card expands channel capacity cost-effectively while maintaining signal integrity through exceptional isolation and low contact potential.
## Technical Specifications
**Channel Configuration**
• 10 channels per card
• Z-pole Form A contact arrangement with common guard connection
• Switches any one of ten signals to a single output or one signal to any of ten outputs
**Signal Handling**
• Maximum signal level: 200 V peak, 100 mA, 2 VA peak (resistive load)
• Recommended operation: less than 10 V or 10 mA for extended relay life
• Relay drive current: typically less than 1 µA per relay
**Contact Performance**
• Contact resistance: less than 0.2 Ω to rated life; typical less than 0.5 Ω per contact
• Contact potential (thermal offset): less than 1 µV input to output with copper leads; typical less than 200 nV within 1 minute of actuation
• Contact life: 10⁸ closures (cold switching); 10⁶ closures at maximum signal levels (200 V/100 mA)
**Isolation & Timing**
• Channel isolation: greater than 10¹² Ω; less than 10 pF capacitance
• Input isolation — differential: greater than 10⁹ Ω, less than 40 pF
• Input isolation — common mode: greater than 10⁹ Ω, less than 150 pF
• Common mode voltage: less than 200 V peak
• Actuation time: less than 2 milliseconds
• Warm-up time: 1 hour for thermal stability
**Environmental & Physical**
• Operating temperature: 0°C to 50°C (up to 35°C at 70% RH)
• Storage temperature: -25°C to 65°C
• Dimensions: 32 mm H × 114 mm W × 272 mm L
• Weight: 0.35 kg
• Connector type: screw terminals, accommodating wire up to 18 AWG
## Key Features
• Extremely low thermal voltage error—critical for precision low-level measurements
• High contact isolation exceeding 10¹² Ω minimizes crosstalk
• Field-removable design for easy installation and replacement
• Screw terminal connectivity supports quick signal routing
## Typical Applications
Thermocouple and resistance temperature detector (RTD) scanning; multi-channel low-level transducer multiplexing; automated data acquisition systems requiring high channel density with minimal signal corruption.
## Compatibility & Integration
Designed exclusively for Keithley Model 705 and Model 706 scanner mainframes. Mounts via rear panel slot; no external cabling required beyond signal connections.
