Murphy Switch TDX6 User Manual

TDX-9106B  
Revised 11-02  
Catalog Section 10  
(00-02-0049)  
®
Temperature Scanner/Pyrometer SWICHGAGE  
Scans 6 Channels  
Adjustable Trip Points  
Model TDX6  
“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  
Approved*  
Easy to Read Digital Display  
Approved**  
*
When used with approved ignition.  
Contact Murphy for details.  
** When used with power requirements  
described below.  
Scans all 6 sensors in 30 seconds  
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  
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.  
Easy to Read  
selector allows the operator to set  
Digital Display  
and view each trip point. With the  
Thermocouple  
selector in the scan mode, a  
Read  
“thermocouple read” push button  
provides a means to manually  
Trip Point  
Read/Scan  
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.  
Trip Point  
Adjustment  
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).  
Type “J” or “K”, groundedor ungrounded thermocouples are  
accommodated. Other types are available upon request.  
Scanning Speed: Complete scan in 30 seconds.  
The TDX6 can interface with other Murphy SELECTRONIC®  
Reset Differential: F.E.T. models: Decreases 3 Degrees (°F or  
TATTLETALE® annunciators and Micro-controllers. It is rated for  
°C). S.C.R. models: Turn input power off to reset.  
*
Class I, Division 2, Group D, hazardous areas and is available  
for operation from CD ignition, 120 VAC, or 24 VDC.  
Display Update Time: Updates temperature every 0.3 seconds.  
Start-up Time Delay: Unit is locked out for 10 seconds after  
Applications  
Gas Compressor  
Suction/Discharge Temp.  
Engine/Compressor Jacket  
Water Temperature  
ignition voltage is sensed.  
Process Temperatures  
Generators  
Ambient Cold Junction Compensation Range:  
2°F from 32°F to 122°F (1°C from 0°C to 50°C).  
Pumps  
Measurement Range: Monitor Range 0-1999°F or °C (specify °F  
Engine Exhaust Temperature  
or °C in part number).  
Accuracy:  
Features  
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.  
Monitors six (6) input sensors  
Accepts type “J” or “K” thermocouples groundedor ungrounded  
Field adjustable trip points  
LCD display in either °F or °C (specify)  
Trip Point Accuracy: 3°F ( 2°C) of reading.  
One thermocouple maybe selected for continuous display  
CD ignition, 24 VDC, or 120 VAC powered  
No special training or programming required  
Trip Point Adjustment Range: 0-1999 Degrees.  
Open Thermocouple Input: A number 1 appears in the display  
tUostinhgegrroigunhdteodfthtehremocchouapnlenseinltnroudmucebsetrhearnisdk othf oeddtrcipurrpeontisnotrovpoletargaetses.  
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.  
 

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