Keysight / Agilent / HP 44422A Relay Multiplexer Thermocouple Compensation Terminal Block (Terminal Block Only)
The Keysight 44422A is a Relay Multiplexer Thermocouple Compensation Terminal Block designed for use with various Keysight measurement systems. It provides thermocouple compensation for accurate temperature measurements. Terminal Block Only.
- Model
- Keysight / Agilent / HP 44422A
- Calibration
- Available on request
- Price
- $145
- Status
- In stock
- RFQ ref
- 44422A
This unit
The Keysight 44422A is a relay multiplexer thermocouple compensation terminal block designed as a plug-in assembly for the HP 3497A Data Acquisition/Control Unit. This detachable terminal card assembly provides isothermal reference junction compensation to eliminate measurement errors in thermocouple-based temperature acquisition systems. It supports both hardware and software compensation techniques, enabling flexible deployment across single or mixed thermocouple type configurations.
Technical Specifications
Maximum Input Voltage: Less than 170 V peak between any two input terminals
Maximum Current: 50 mA per channel (non-inductive)
Maximum Power: 0.5 VA per channel
Reference Junction Compensation Accuracy: 1°C
Thermal Offset (Direct Switched): Less than 1 µV differential
Thermal Offset (Tree Switched): Less than 2 µV differential
Closed Channel Resistance (Series): 100 Ω ±10% in High, Lo, and Guard
Relay Contact Resistance: Less than 1 Ω per contact
Key Features
Isothermal connector block eliminates unwanted thermocouple measurement errors
Hardware Compensation Mode: Supports up to 20 thermocouples per assembly; single thermocouple type (B, E, J, K, R, S, or T)
Software Compensation Mode: Supports up to 19 thermocouples per assembly; mixed thermocouple types with programmatic voltage-to-temperature conversion
Capable of voltage and resistance measurements in addition to thermocouple temperature acquisition
Modular design with detachable relay card and terminal card components
Typical Applications Multi-channel thermocouple temperature monitoring in data acquisition systems requiring reference junction compensation. Applicable to systems needing either homogeneous or heterogeneous thermocouple arrays with software-based calibration.
Compatibility & Integration Host System: HP/Agilent/Keysight 3497A Data Acquisition/Control Unit (Option 020 plug-in assembly) Supported Thermocouple Types (Hardware Mode): B, E, J, K, R, S, T
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 50 mA per channel, Less than 170 V peak |
Keysight / Agilent / HP 44422A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Keysight / Agilent / HP 44422A. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
Keysight / Agilent / HP 44422A price
This Keysight / Agilent / HP 44422A is listed at $145. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Keysight / Agilent / HP 44422A calibration cost
NIST-traceable calibration for the Keysight / Agilent / HP 44422A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
