# Keysight U2802A 31-Channel Thermocouple Input Signal Conditioner

# Keysight U2802A 31-Channel Thermocouple Input Signal Conditioner

31-Channel Thermocouple Input Signal Conditioner.

## Key Specs

-   Input Channels: 31 differential + 1 CJC
-   Max Sampling Rate: 500 kSa/s (overall module)

## Product Core & Specifications

Specification

Value

General Characteristics

Number of channels

31 differential and 1 CJC

Input voltage range for voltage mode

± 10 V (signal + common mode)

Input voltage (thermocouple mode)

± 100 mV

Sampling rate for thermocouple mode

10 kSa/s total for all channels

Sampling rate for overall module

500 kSa/s

Thermocouple types

J, K, R, S, T, N, E, and B

Input Specifications

Accuracy (thermocouple mode) — Overall gain error

0.06% (23 °C ± 5 °C)

Accuracy (thermocouple mode) — Overall offset error

15 μV (without zeroing) (23 °C ± 5 °C); 6 μV (with zeroing)

Accuracy (thermocouple mode) — Nonlinearity

< 0.005% of full scale range

System noise (rms) — Gain (× 1)

100 μVrms

System noise (rms) — Gain (× 100)

5 μVrms

CMRR — Voltage mode

\> 60 dB

CMRR — Thermocouple mode

\> 80 dB

Cold junction accuracy

± 1.0 °C typical (23 °C ± 5 °C); ± 1.5 °C typical (0 °C to 18 °C, 28 °C to 55 °C)

Input Characteristics

Bandwidth (voltage mode)

\> 500 kHz

Bandwidth (thermocouple mode)

4.0 Hz

Overvoltage protection — TC mode

Common mode: ± 17 V (TC+ and TC– w.r.t. GND); Differential mode: ± 7 V

Overvoltage protection — Bypass mode

± 20 V (TC+ input w.r.t. GND)

Overvoltage protection — Power-off mode

± 11 V (TC+, TC– input w.r.t. GND)

Input impedance

1 GΩ

Input bias current

± 2.5 nA max

Input offset current

± 1.5 nA max

Gain drift

60 ppm/°C max

Offset drift

1 μV/°C max

Filter cutoff frequency (–3 dB) (thermocouple mode)

4.0 Hz

Filter type (thermocouple mode)

Low Pass RC Filter

Recommended warm up time

30 minutes

General & Environmental

Power consumption

+12 VDC, 480 mA maximum

Operating temperature

0 °C to +55 °C

Relative humidity

50% to 85% RH (non-condensing)

Altitude

Up to 2000 meters

Storage compliance

–40 °C to 70 °C

Shock and vibration

Tested to IEC/EN 60068-2

I/O connector

2 × 68-pin female SCSI connector; 2 × 34-pin screw terminal block; 1 × 24-pin screw terminal block

Dimension (W × D × H)

158.70 mm × 254.20 mm × 40.50 mm

Weight

1.036 kg

## About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 2281.0 USD
- **Vendor:** Keysight Technologies
- **Type:** Accessory
- **Tags:** product_manual_group_3

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2281.00 USD | In stock |

## Images

- Keysight U2802A 31-Channel Thermocouple Input Signal Conditioner

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> Source: [ValueTronics](https://valuetronics.com/products/u2802a-keysight-data-logger-new)
> Updated: 2026-06-20