The Keysight E1344A is a B-size, 1-slot VXI register-based multiplexer module engineered for high-voltage thermocouple measurements. It switches 16 channels of high, low, and guard signals to a compatible DMM, enabling multi-point temperature acquisition with automatic cold junction compensation. The module handles DC and AC voltages up to 250 V with channel currents to 50 mA, delivering thermal measurement accuracy within 10 µV differential offset per channel.
Technical Specifications
• Maximum voltage (DC): 250 Vdc (any terminal to any other or chassis)
• Maximum voltage (AC rms): 250 V rms (any terminal to any other or chassis)
• Maximum current per channel (non-inductive): 50 mA
• Maximum power per channel: 1 VA
• Maximum thermal offset (differential Hi-Lo): 10 µV
• Closed channel resistance: 100 Ω ± 10%
• Channel configuration: 16-channel switching (high, low, guard)
• Form factor: B-size, 1-slot VXI module
– Key Features
• Thermocouple-compensated relay switching for 16 independent channels
• Automatic cold junction compensation for standard thermocouple types
• Register-based control via SCPI commands
• Includes one analog bus cable for mainframe connectivity
• Closed channel resistance of 100 Ω ± 10% ensures signal integrity
• Thermal offset specification of 10 µV minimizes measurement error in precision applications
– Typical Applications
Multi-point thermocouple temperature monitoring across industrial, laboratory, and environmental test environments. Channel scanning with automatic type conversion for diverse thermocouple inputs. Integration with VXI-based measurement systems requiring synchronized voltage, current, or resistance measurements alongside temperature data.
– Compatibility & Integration
Operates with Agilent E1326B or E1411B DMMs. For B-size mainframes (E1300B, E1301B), connect via the analog bus cable supplied with the E1326B DMM. C-size mainframes require the E1403C active adapter. The module ships with one analog bus cable for direct slot-adjacent module connection.
