Murphy TDX6 specifications Description, Applications, Features, Specifications

Easy to Read Digital Display

Thermocouple

Read

Trip Point

Read/Scan

Trip Point

Adjustment

	TDX-9106B
Temperature Scanner/Pyrometer SWICHGAGE	Revised 11-02
	® Catalog Section 10
	(00-02-0049)

Model TDX6

Approved *

Approved**

Description

The TDX6 is an advanced design 6-point temperature scanner and pyrometer. It continually scans up to six thermocouples and sequentially displays the thermocouple number and its reading. Each sensor input has a field settable trip point for alarm, shut- down or control. A read/scan

selector allows the operator to set

and view each trip point. With the selector in the scan mode, a “thermocouple read” push button

provides a means to manually toggle through the six channels and to lock in on a specific chan- nel. Normal scanning will resume

approximately three seconds after releasing the push button. All trip points are continually armed and active during the scanning process.

Type “J” or “K”, grounded† or ungrounded thermocouples are accommodated. Other types are available upon request.

The TDX6 can interface with other Murphy SELECTRONIC® TATTLETALE® annunciators and Micro-controllers. It is rated for Class I, Division 2, Group D, hazardous areas* and is available for operation from CD ignition, 120 VAC, or 24 VDC.

Applications

• Gas Compressor	• Process Temperatures
Suction/Discharge Temp.	• Generators
• Engine/Compressor Jacket	• Pumps
Water Temperature	• Engine Exhaust Temperature

Features

■Monitors six (6) input sensors

■Accepts type “J” or “K” thermocouples grounded† or ungrounded

■Field adjustable trip points

■LCD display in either °F or °C (specify)

■One thermocouple maybe selected for continuous display

■CD ignition, 24 VDC, or 120 VAC powered

■No special training or programming required

•Scans 6 Channels

•Adjustable Trip Points

•“J” or “K” Thermocouples

•Powered by CD Ignition, 24 VDC, or 120 VAC

•Rated for Class I, Division 2, Group D Hazardous Areas

•Start-up Time Delay

•Easy to Read Digital Display

*When used with approved ignition. Contact Murphy for details.

**When used with power requirements described below.

■Scans all 6 sensors in 30 seconds

Specifications

Power Requirements (Operating Voltages): 120 VAC or 80-250 VDC, CD ignition or 24 VDC.

Outputs:

Models TDX6-A and TDX6-C: Six (6) isolated Silicon Controlled Rectifier (S.C.R.) outputs; 0.5 A @ 250 VDC; switches on (applies ground) above trip point and switches off (removes ground) when power is switched off.

Models TDX6-B and TDX6-D:Six (6) isolated Field-Effect Transistor (F.E.T.) outputs; 0.1 A @ 250 VDC; switches on (applies ground) above trip point and switches off (removes ground) below trip point.

Operating Temperature: -4 to 158°F (-20 to 70°C).

Storage Temperature: -40 to 300°F (-40 to 150°C).

Case: ABS 1/4 DIN (90 x 90 mm).

Scanning Speed: Complete scan in 30 seconds.

Reset Differential: F.E.T. models: Decreases 3 Degrees (°F or °C). S.C.R. models: Turn input power off to reset.

Display Update Time: Updates temperature every 0.3 seconds.

Start-up Time Delay: Unit is locked out for 10 seconds after ignition voltage is sensed.

Ambient Cold Junction Compensation Range:

2°F from 32°F to 122°F (1°C from 0°C to 50°C).

Measurement Range: Monitor Range 0-1999°F or °C (specify °F or °C in part number).

Accuracy:

With J-type thermocouple: from 50-150°F (10-66°C) +3°F(+2°C), from 150-1200°F (66-649°C) ±1.0% of reading.

With K-type thermocouple: from 400-2000°F(204-1076°C) ±1.0% of reading.

Trip Point Accuracy: ±3°F (±2°C) of reading.

Trip Point Adjustment Range: 0-1999 Degrees.

Open Thermocouple Input: A number 1 appears in the display

†to the right of the channel number and the trip point operates. Using grounded thermocouples introduces the risk of odd currents or voltages

being imposed on the thermocouple signal which can affect the accuracy of the reading. This is an inherent problem of grounded thermocouples, the reason why we prefer ungrounded thermocouples.