Murphy Temperature Scanner/Pyrometer SWICHGAGE TDX6 - Manual

TDX-9106B
Revised 11-02
Catalog Section 10
(00-02-0049)
Temperature Scanner/Pyrometer SWICHGAGE ®
• 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.
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 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.
Easy to Read
Digital Display
Thermocouple
Read
Trip Point
Read/Scan
Trip Point
Adjustment
Approved
**
Approved
*
Model TDX6
†
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.