The Fluke 5440A-7002 is a low thermal EMF test lead set engineered as a precision accessory for Fluke 5440 Series calibrators. This set minimizes thermal electromotive force errors across lead terminations, delivering superior accuracy in high-precision temperature measurement and calibration workflows where thermal EMF drift directly impacts measurement integrity.
## Technical Specifications
• **Connector Type:** Safety type connectors with retractable spring-loaded hood
• **Connector Diameter:** 4 mm
• **Cable Configuration:** Two parallel coaxial cables (RG-58/U type) for high and low connections; third blue wire bonded to shields of both coaxials
• **Center Conductor Material:** Tellurium copper
• **Spring Tip Material:** Beryllium copper
• **Included Leads:**
– One 5440A-7005 lead: 122 cm (4 feet)
– Two 5440A-7004 leads: 61 cm (2 feet) each
## Key Features
• Tellurium copper center conductors paired with beryllium copper spring tips reduce thermal EMF generation compared to standard test leads
• Dual coaxial construction isolates high and low signal paths, minimizing cross-coupling and EMF artifacts
• Shield bonding topology via blue wire reduces ground loop-induced errors in differential temperature environments
• Spring-loaded connectors ensure consistent contact pressure and reproducible termination contact resistance
## Typical Applications
Low thermal EMF lead sets address precision calibration workflows requiring sub-microvolt measurement stability, particularly in temperature coefficient validation, RTD/thermocouple simulator verification, and millivolt-level DC source calibration where lead thermal gradients would otherwise dominate measurement uncertainty.
## Compatibility & Integration
Designed exclusively as an accessory for Fluke 5440 Series calibrators. The three-conductor architecture and 4 mm connector footprint integrate directly with 5440 series input terminals without adapter hardware.
