MODEL 422 DUAL CHANNEL THERMOCOUPLE CONDITIONER

Description

The Model 422 is a rack-mounted dual-channel thermocouple conditioner with cold junction compensation for type J thermocouples. A version for type K is also available, or millivolt signals may be amplified and isolated. The TC input is isolated from the output by up to 3500VDC. Open wiring is indicated by a front panel LED, for each channel.

Specifications

Input: Type J thermocouple wire (type K available), or millivolt signal

Cold junction compensation: Type J or K

Output: 10mVDC per °C; 3.1mV at 0°C

Voltage input scaling: Factory set at unity gain; other gains available

Gain accuracy: ±0.5% max

Input-output isolation: ±3500VDC or 2500VRMS

Open TC indication: Front panel LED on open channel

Frequency response: Two pole lowpass filter with -3dB point set at 10kHz

Connections:	TC Input	Standard round-pin thermocouple connector
	mV Input	Unpluggable 2-position wireclamp screw terminal
	Output	Board-mounted BNC

Mechanical: Bare PC board mounts in 10 board 19" rack adaptor, Model 4007-142

Power: Regulated ±15VDC from rack-mounted power supply (115VAC input)

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