Keithley 740 Scanning Thermometer Multi-Channel Temp Range -200C to 1820C
Keithley
Details
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CategoryMeter
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Dimension15.0in x 9.0in x 5.0in
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Serial424304
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Shipping TypeFedEx Ground
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ManufacturingDoes Not Apply
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Voltage / Hertz120V / 50Hz/60Hz
Description
The KEITHLEY Model 740 is a versatile system scanning thermometer, designed for precision temperature measurements across a wide range of industrial and laboratory applications. This used unit, equipped with a single internal channel and expandable to 81 channels with additional scanner cards, supports seven different thermocouple types (J, K, T, E, R, S, B) and conducts millivolt measurements. Temperature readings range from -200C to +1820C, meeting the demands of both industrial and laboratory environments. Key features include automatic scanning, data storage (up to 81 channels), a high scanning rate of 20 channels per second, and digital calibration requiring no internal adjustments. The Model 740 offers a digital bench reading rate of up to 8 readings per second and includes open thermocouple detection for enhanced reliability. Optimized for operation in environments from 0-50°C with humidity derating beyond 35°C, it fits seamlessly into sophisticated labs. Power specifications include 120V and 50Hz/60Hz, ensuring compatibility with standard electric setups.
Key Features
- Supports seven thermocouple types (J, K, T, E, R, S, B)
- Temperature range: -200C to +1820C
- Automatic scanning up to 81 channels
- 20 channels per second scanning rate
- Digital calibration with no internal adjustments
- Open thermocouple detection
- Channel capacity expandable with Model 705, 7057A and 706 scanner cards
Specifications
- Maximum Allowable Input: 250V rms, 350V peak (for 1 minute)
- Maximum Common Mode Voltage: 200V peak to earth
- Maximum Thermocouple loop resistance: 1kO
- Filter Settling time: 100ms (typical)
- Scanning Rate: Greater than 20 channels/second with filter disabled
- Bench Reading rate: 8 readings/second with filter disabled
- Logging Interval: 12 selectable rates from 50ms to 1 hour
- Operating Environment: 0-50°C, up to 80% relative humidity at 35°C
- Storage Environment: -25 to 60°C
- Power: 105-125V or 210-250V, 20VA, 50/60Hz
Weight
Imperial: 13.2 Pounds
Metric: 5.99 Kilograms
Shipping Dimensions
Imperial: 18.0 lb x 10.8 lb x 6.0 lb
Metric: 45.72 cm x 27.43 cm x 15.24 cm
Harmonized Code
90251900
Harmonized Code Details
Harmonized code 90251900 is for thermometers and pyrometers, not combined with other instruments. This code fits the item as it is a specialized temperature measuring device using multiple channel capabilities.
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