Murphy TDXM DC Temperature Scanner Installation and Operations Manual

TDXM-DC Temperature Scanner/Pyrometer

Installation and Operations Manual

TDXM-00065N

Revised 06-06

Section 10

00-02-0511

Please read the following information before installing . This installation information is intended for the TDXM-DC.

A visual inspection of this product before installation for any damage during shipping is recommended.

GENERAL INFORMATION

WARNING

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

✔

Disconnect all electrical power to the machine.

✔

Make sure the machine cannot operate during installation.

✔

Follow all safety warnings of the machine manufacturer.

✔

Read and follow all installation instructions.

Description

The innovative new TDXM now gives you a unique configurable temperature scanner/pyrometer with a built-in power supply. A new design features a 7-character, 7-segment Liquid Crystal Display window with 1/2 inch (13 mm), easy-to-read characters. Also located on the faceplate are membrane keys for easy configuring.

Highly reliable and versatile, the TDXM accepts up to 24 type “J” or “K” grounded or ungrounded* thermocouples. Each channel has three (3) adjustable setpoints SP1, SP2 and

SP3. The SP1, SP2 and SP3 Setpoints correspond to the SP1, SP2 and SP3 outputs.

Additionally it has the selectable feature to monitor and alarm or shutdown on deviation from an average from up to two groups of temperatures (GRP/DEV; deviation from average). One group could be exhaust temperatures and another group could be bearing temperatures. The

TDXM is capable of communicating with controllers, PLC’s, computers or SCADA systems by a built-in RS485 serial communications port.

The TDXM-DC is available for 10 - 32 VDC systems.

User Interface (Faceplate)

The User Interface includes a numeric LCD display and a 5-button membrane keypad for readout and channel configuration. Thermocouple types can be selected and setpoints entered through a series of setup menus, see “Setup Menus” section.

Thermocouple Types

Each of the 24 channels on the TDXM can be configured as either “J” or “K” type thermocouples and temperature units can be selected as °F or °C for the readout of each channel. Unused channels can be set to “Ignore” and will not be seen in the display and will not affect the outputs. All the unused channels must have the jumper installed.

Control Options

Each TDXM model features three outputs: 2 Field Effect Transistor (FET) outputs and

1 Form-C Relay output. Each channel has 3 setpoints, one for each of the outputs. This allows for greater system flexibility by grouping sets of channels through one output.

Setpoint History

The TDXM stores the last setpoint trip for each output in non-volatile memory.

For instance, if SP1 of channel 1 was the last SP1 tripped, the LCD display will read: SP1 1 when the Setpoint History is accessed for SP1.

Pressing the “channel SP1-3” key will show the channel and the set point for that channel.

If the trip was from a group function, the offending channel is shown with the value of the deviation from average.

TDXM is CSA Certified for Use in Class I, Div.2, Groups

C and D Hazardous Areas when installed per drawing

10-08-0006.

C US

Sensor Inputs and Terminals

The TDXM accepts up to 24, either “J” or “K” type grounded or ungrounded * thermocouples using 24 pairs of screw type connections. Each pair has a jumper from the factory. Any tripped setpoint is detected within 2 seconds after the set point is exceeded.

RS485 Serial Port

The RS485 serial port (MODBUS RTU slave) on the back of the module is provided for communicating with micro-controllers, PC’s, PLC’s and SCADA systems (see “Typical Wiring Diagrams”). It is recommended that a termination resistor (customer supplied) be used when the TDXM is the last device connected in a daisy-chain configuration. The Baud rate, number of stop bits, and slave node number can be set using the keypad. Communication is half-duplex.

Modbus RTU function codes 3 and 6 are supported. Devices on the RS-485 network must have a common ground.

Modbus Integer Holding Registers

See “TDXM I/O Addresses” on page 4.

Replacement Parts

Plug, kit, TDXM: Terminal Plug replacement kit-P/N 10-00-7848.

Specifications

Power Input (Operating Voltages): 10- 32VDC, 750 mW max.

Sensor Inputs: Up to 24 type “J” or “K” grounded or ungrounded * thermocouples.

Outputs: Two (2) Outputs 0.5 A, 350 VDC, FET-sink to ground to trip.

One (1) Form “C” Solid State Relay Output 0.125 A, 350 VDC/240 VAC.

NOTE: The form “C” relay output is de-energized for a trip condition. The NC terminal is closed and the NO terminal is open for trip.

Communications: RS485 Serial Port, Modbus RTU slave.

Operating, Storage, and Display Temperature: -40 to 185°F (-30 to 85°C).

Sensor Scan Rate: Scans all channels in 2 seconds.

Range: Type J: 0 - 1538°F (0 - 837°C); Type K: 0 - 1999°F (0 - 1093°C).

Display Type: Custom 7-segment, 7-character type with temperature units indication and setpoint trip indication.

Accuracy: Cold junction: Better than ±0.5°C (1.0°F).

Type “J” or “K”: ±1°C (2°F); 38 - 1093°C (100 - 1999°F).

Cold Junction Compensation: -40 to 85°C (-40 to 185F).

Open Thermocouple Detection: Drives channel reading high.

NOTE: ANSI MCQ6.1 states limits of error for thermocouples. Type “J” 0 - 750°C (32 -

1382°F) ±2.2°C (±4.4°F) or ±0.75%. Type “K” 0 - 1250°C (35 - 2282°F) ±2.2°C (±4.4°F) or ±0.75% whichever is greater.

* We recommend the use of ungrounded thermocouples. Errors in readings with grounded thermocouples can be the result of differences in grounding between different devices.

Installation TDXM-00065N page 1 of 12

TDXM (ALL MODELS) MOUNTING DIMENSIONS

WA RN G:: P erform the mounting operation with power source off. The TDXM Series module was designed to be mounted within a weatherproof enclosure. It is intended for mounting in a flat panel. A square mounting hole of 5.5 in. (140 mm) and four mounting screw holes are needed. Insert the module from the front side of the panel and secure the four mounting screws and nuts through the bezel.

Front View Side View

5-1/4 in.

(133 mm)

TC TYPE/UNITS (SETUP 1)

0 = IGNORE

1 = TYPE J TC. DEG F

2 = TYPE K TC. DEG F

3 = TYPE J TC. DEG C

4 = TYPE K TC. DEG C

RTU/BAUD (SETUP 7)

BAUD SETUP

0 = 9600 (N, 8, 1)

1 = 19.2K (N, 8, 1)

2 = 38.4K (N, 8, 1)

3 = 9600 (N, 8, 2)

4 = 19.2K (N, 8, 2)

5 = 38.4K (N, 8, 2)

TDXM

SP

HISTORY

C US

SETUP NUMBERS

0 = EXIT

1 = TC TYPE UNIT

2 = OFFSET

3 = SETPOINTS

4 = GRP/DEV A (SP1 OUT)

GRP/DEV B (SP2 OUT)

5 = CH SCAN DELAY

6 = CJ DISPLAY

7 = RTU/BAUD

8 = UNIT ID

CJ DISPLAY (SETUP 6)

0 = DISABLE

1 = ENABLE, DEG F

2 = ENABLE, DEG C

CHANNEL

SP1 - 3

(SETUP)

SCROLL

ENTER

(SETUP)

6-1/2 in. (165 mm)

6-1/2 in.

(165 mm)

49/64 in.

(19 mm)

5-1/4 in.

(133 mm)

Back View

TDXM-DC

POWER INPUT: 10-32 VDC

OUTPUT TYPE AND RATING:

SP1: FET, OPEN DRAIN,

350 VDC, 0.5A MAX.

SP2: FET, OPEN DRAIN,

350 VDC, 0.5A MAX.

SP3: SSR, FORM C,

350 VDC/240 VAC, 0.12A MAX.

NON-INCENDIVE FIELD

WIRING CONNECTIONS

FOR USE IN CLASS I

DIV. 2, GROUPS C & D

LOCATIONS WHEN INSTALLED PER

MURPHY DRAWING 10-08-0006

THERMOCOUPLE INPUTS

(WHITE / YELLOW)

3-3/8 in.

(86 mm minimum mounting clearance)

NOTE: Ground stud connection is only for single wire to equipment ground. Do NOT use for more than one wire.

Mounting Hole

6.0 in. (152.3 mm)

3.0 in.

(76 mm)

Mounting Hole

3.0 in.

(76 mm)

Panel Mounting Side View

Keps nut

Screw

Lock washer

5.50 in.

(140 mm)

6.0 in.

(152 mm)

Mounting

Hole

5.50 in. (140 mm) 0.156 in. (4 mm) dia. 4 places

Panel

MP OR NT F or outdoor use the TDXM Series module should be mounted within a weatherproof enclosure.

Installation TDXM-00065N page 2 of 12

TDXM-DC TYPICAL WIRING DIAGRAM

WARNING: FOR HAZARDOUS APPLICATION REQUIREMENTS, THE TDXM COMPLETE SYSTEM MUST BE INSTALLED

IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC) CLASS I, DIVISION 2, GROUPS C & D (ARTICLE 504)

SPECIFICATIONS AND PER FWMURPHY DRAWING NUMBER 10-08-0006. ROUTE THE SENSOR INPUT WIRES AWAY

FROM OTHER WIRES (2 IN. [51 MM] MINIMUM).

+22

+21

+20

+19

+24

+23

+15

+14

+16

+18

+17

+13

+12

+11

+10

+3

+2

+4

+6

+5

+1

+8

+7

+9

-11

-10

-12

-13

-3

-2

-4

-1

-6

-5

-8

-7

-9

-15

-14

-17

-16

-19

-18

-21

-20

-23

-22

-24

Installation TDXM-00065N page 3 of 12

Ch#19

Ch#20

Ch#21

Ch#22

Ch#23

Ch#24

Ch#13

Ch#14

Ch#15

Ch#16

Ch#17

Ch#18

Ch#7

Ch#8

Ch#9

Ch#10

Ch#11

Ch#12

Channel

Ch#1

Ch#2

Ch#3

Ch#4

Ch#5

Ch#6

Cold Junction Average

CJ1 Celsius degrees (*100)

CJ2 Celsius degrees (*100)

Cold Junction Display (0,1,2)

Delay Display

Force Outputs

SP1 Channel Alarm

SP1 Set Point

SP2 Channel Alarm

SP2 Set Point

SP3 Channel Alarm

SP3 Set Point

Deviation Alarm #1

Deviation Error #1

Deviation Alarm #2

40,019

40,020

40,021

40,022

40,023

40,024

40,013

40,014

40,015

40,016

40,017

40,018

40,007

40,008

40,009

40,010

40,011

40,012

Eng.Units

40,001

40,002

40,003

40,004

40,005

40,006

40,049

40,050

40,051

40,052

40,053

40,054

40,043

40,044

40,045

40,046

40,047

40,048

40,037

40,038

40,039

40,040

40,041

40,042

SetP#1

40,031

40,032

40,033

40,034

40,035

40,036

TDXM I/O ADDRESSES

40,073

40,074

40,075

40,076

40,077

40,078

40,067

40,068

40,069

40,070

40,071

40,072

40,061

40,062

40,063

40,064

40,065

40,066

SetP#2

40,055

40,056

40,057

40,058

40,059

40,060

40,097

40,098

40,099

40,100

40,101

40,102

40,091

40,092

40,093

40,094

40,095

40,096

40,085

40,086

40,088

40,068

40,089

40,090

SetP#3

40,079

40,080

40,081

40,082

40,083

40,084

40025

40026

40027

40028

40029

40030

40151

40152

40153

40154

40155

40156

40157

40158

40159

Miscellaneous

Deviation Error #2

Group Size #1

Deviation Setpoint #1

Enable Value #1

Enabling Channel #1

Group Size #2

Deviation Setpoint #2

Enable Value #2

Enabling Channel #2

Delay ADC (from 40 to 99 mS)

Watchdog cnt.

RTU Node #

Revision (*100)

ID Prefix number (0-99)

ID Suffix number (0-9999)

Installation TDXM-00065N page 4 of 12

40168

40169

40170

40171

40172

40173

40174

40160

40161

40162

40163

40164

40165

40166

40167

40,121

40,122

40,123

40,124

40,125

40,126

40,115

40,116

40,117

40,118

40,119

40,120

40,109

40,110

40,111

40,112

40,113

40,114

Offsets

40,103

40,104

40,105

40,106

40,107

40,108

40,145

40,146

40,147

40,148

40,149

40,150

40,139

40,140

40,141

40,142

40,143

40,144

40,133

40,134

40,135

40,136

40,137

40,138

TC Type

40,127

40,128

40,129

40,130

40,131

40,132

SEQUENCE OF OPERATIONS

SEQUENCE OF OPERATIONS

SCANNING

NORMAL SCAN

During Normal Scan mode, each channel is displayed for the period set in the CH SCAN DELAY (Setup 5). The default is 3 seconds. When the CH SCAN DELAY expires, the display changes to show the next channel. After all channels have been displayed, the sequence starts again from the first channel. The LCD looks like this:

CHANNEL SP1-3 button again to return to the Normal or Locked Scan mode. No changes can be made to the setpoints from this view. To change a setpoint, use the SETPOINTS (setup 3) menu.

SP HISTORY

During Normal or Locked Scan mode, a history of the last channel setpoint trip can be viewed. To enter the SP HISTORY channel display, press the SP HISTORY button.

The display will first show:

The Normal Scan mode can be turned ON or OFF. To toggle the

Normal Scan mode, press and hold the SCROLL button until the display shows (approx. 1 sec.):

The value on the right represents the channel that tripped for the SP# shown. From this display, use the UP button to view SP2 and SP3. For each SP# it is possible to view the setpoint for that channel when the channel tripped. Press the CHANNEL SP1-3 button to view the setpoint for the channel stored in the history.

If the group/deviation caused the trip, the display will show: or

Pressing the CHANNEL SP1-3 button will show the channel that caused the trip, and the temperature deviation that caused the trip. The temperature deviation shown is an absolute value. In other words, if the deviation was a negative number, a positive number will be shown.

It is possible to disable channels from being displayed, by selecting the channel as "Ø=Ignored" in the TC TYPE / UNITS (Setup 1).

LOCKED SCAN

During a Locked Scan, the Normal Scan is temporarily interrupted and only the Locked Channel is displayed for 60 seconds. A channel is locked when the UP or DOWN buttons are used to select a channel during

Normal Scan mode. To unlock, and resume Normal Scan mode, press the

SCROLL button.

After 60 seconds, the Normal Scan mode will resume, if no other keys have been pressed.

It should be noted that, while only one channel is being displayed, all channels are being scanned and checked against their (3) setpoints every 2 seconds. All set points remain active at all times.

CHANNEL SP1-3

During Normal or Locked Scan mode, the setpoints for each channel can be viewed. To enter the CHANNEL SP view for the channel currently displayed, press and hold the CHANNEL SP1-3 button for approx. 1 second.

The display will first show:

SP3 LATCH

The TDXM-DCW/SP3 LATCH is a special version available to latch one of the three digital outputs when a trip is detected. For this version only, setpoint values are first-out. If a sensor channel temperature rises above setpoint, SP3 will activate and remain active until RESET or power is recycled in the unit. The display will show 1 2 3 (#3 is ON).

The icons for SETPOINT 1 and 2 may also be ON depending on the status of those setpoints.

If the tripped channel clears, the ouptput for SP3 will not clear and the

SP History for SP3 will not be overwritten by other SP3 trips.

Example: If CH21 and CH22 have an SP3 setpoint of 180 and CH21 temperature rises to 190, SP3 OUT will be activated and the SP History will show SP3 21 as the cause for trip. If temperature for SP3 21 falls below 180 or SP3 22 rises above 180 after the trip has occured, the SP3

OUT will remain active and the SP History will not be altered.

All channels continue to be scanned and compared against SP1 and SP2 setpoint values.

To RESET the SP3 Output and allow continued scanning of SP3 setpoints, press and hold SCROLL ENTER and DOWN ARROW keys simultaneously for at least 3 seconds. The display will indicate the latch has been cleared when the number 3 is no longer visible on the SET-

POINT icon display. The display will show SETPOINT 1 2 3 (#3 is

OFF). The icons for SETPOINT 1 and 2 may also be ON depending on the status of those setpoints.

From this display, use the UP button to view SP2 and SP3. Press the

Installation TDXM-00065N page 5 of 12

SET UP

To enter the SETUP routines, press the SCROLL ENTER and

CHANNEL SP1-3 buttons simultaneously for 5 seconds. The display will first show:

SET UP

Setup 2 = OFFSET

Setup 3 = SETPOINTS

Setup 4 = GRP / DEV SETUP

Setup 5 = CH SCAN DELAY

Setup 6 = CJ DISPLAY SELECTION

Setup 7 = RTU / BAUD SETUP

While continuing to depress the two buttons, the display will show progress in the form of dashes until the 5 seconds expires, as shown here:

Setup 1 TC TYPE / UNITS

Each channel can be individually set to display in units °C or °F for

Type J or K thermocouples, or ignored completely. When a channel is ignored, it is no longer scanned or displayed. Ignored channels do not appear in other SETUP menus. When the display shows SETUP 1, pressing the SCROLL ENTER button will change the display to the entrance and exit display for this setup.

The LCD will first display the Channel Select display:

After the 5 second delay expires, the user will be required to enter a passcode. This shows that display (code is on a single sheet of paper provided with the instructions to the original buyer of the product):

Use the UP and DOWN buttons to select the desired channel to setup.

(Select CH 0 to exit.) Press the SCROLL ENTER button and the display will read:

Use the UP and DOWN buttons to set the correct code and press the

SCROLL ENTER button to enter the SETUP menu. If the correct code is not entered, the display will show:

After 3 attempts, the display will return to Normal Scan mode. Upon entering the correct code, the SETUP menus can be accessed. The LCD will display:

Use the UP and DOWN buttons to select the desired SETUP number and press the SCROLL ENTER button. To exit the SETUP menu, select

Setup 0 and press the SCROLL ENTER button. In the SETUP menu, a

"zero" shortcut can be used to return to a zero value such as CH 0 or

SETUP 0. Press the CHANNEL SP1-3 button to "zero" any menu value.

Setup 2 OFFSET

It is possible to adjust the temperature value for each channel to match analog gauges or other instrumentation. This OFFSET is added to the actual scanned temperature. The offset for each channel is adjustable from -20 to +20 in the units set (for °F or °C) for that channel. For example, a reading of 100°C with an OFFSET of 5 would be adjusted to 105°C. This adjusted value is used for comparison to setpoints as well as display. At SETUP 2, press SCROLL ENTER.

The LCD will first display the Channel Select entrance/exit display:

SET UP MENU

The Setup menu is as follows:

Setup 0 = EXIT

Setup 1 = TC TYPE / UNITS

0 = Ignore

1 = J type for °F

2 = K type for °F

3 = J type for °C

4 = K type for °C

NOTE: All unused channels must have the jumper installed.

Use the UP and DOWN buttons to set the desired channel type. Press the SCROLL ENTER button to return to the Channel Select display.

Repeat until all channels are configured. Return to CH 0 to exit this setup. Press the UP button to go to SETUP 2.

Installation TDXM-00065N page 6 of 12

SET UP continued

Use the UP and DOWN buttons to select the desired channel to setup.

(Select CH 0 to exit.) Press SCROLL ENTER and the LCD will read:

If the group is set to Ø (zero), the function is disabled. The first group must start with Channel 1. For an example on a 16 cylinder engine, group will be set to 16.

The first 16 channels will be in the group. The group can be all 24 channels. If a second group is used, it starts with the first channel after the first group.

Use the UP and DOWN buttons to select the number of channels that will be grouped in the averaging group. Enter Ø (zero) to disable this feature. Press the

SCROLL ENTER button. Next enter the allowable deviation. This is a temperature adjustable from 0 - 255 in the Units (°F or °C) chosen for the channels:

Use the the UP and DOWN buttons to adjust the offset for the channel being set. Press the SCROLL ENTER button to go back to the channel display. Go to CH 0 to exit by pressing SCROLL ENTER.

Press the UP button to go to SETUP 3.

Setup 3 SETPOINTS

Press the SCROLL ENTER button to get into the setpoint setup.

The LCD will first display the Channel Select entrance/exit display:

If any of the grouped channels (beginning with channel 1) deviates from the average of the other channels by the amount entered, Output 1 will be energized. Use the UP and DOWN buttons to enter an amount. Press the

SCROLL ENTER button. Next enter the enable value. This is a temperature setpoint for enabling the group/deviation function. If the temperature of the channel selected in the next setting exceeds this enabled setpoint, the group/deviation function becomes active:

Use the UP and DOWN buttons to select the desired channel to setup.

Press the SCROLL ENTER button and the LCD will read:

Use UP and DOWN to enter a value. Press the SCROLL ENTER button.

Next enter the enable channel:

SP# indicates the output that the setpoint is tied to. For example SP 1 is tied to Output 1 (SP1 OUT). Use the UP and DOWN buttons to set the desired setpoint. Press the SCROLL ENTER button to accept the entry. Repeat for SP2 and SP3 and you will return to the Channel

Select display. Repeat until all setpoints are entered.

Note that entering Ø (zero) for a setpoint will disable the output for that particular channel. With zero as the set point, open thermocouple will not cause that output to activate. In this way, channels can be grouped, if desired. Further, an alarm before shutdown feature can be implemented by setting the setpoints progressively higher. For example, if SP1 = 900 and

SP2 = 1000, Output 1 (SP1 OUT) could be wired to an Alarm Input and

Output 2 to a Shutdown Input on an annunciator. The range of adjustment is

0-1999 in the Units (°F or °C) chosen for those channels.

Once all setpoints have been entered or checked, go to the CH 0 entrance/exit display. Press the SCROLL ENTER button to exit. Then press UP to go to Setup 4.

Setup 4 GRP / DEV SETUP

At the Setup 4, press the SCROLL ENTER button. The LCD will first display the Number of Channels in the first group to Average. All first group settings have the letter “A”. The second group settings have the letter “b”:

If this channel value is set to Ø (zero), any of the grouped channels will enable the group/deviation function when any of the channels reaches the EN value. If this channel value is set to any other value (1-24), then ONLY that channel will enable the deviation function when it reaches the EN value. The enabling channel does not have to be in the group. Use the UP and DOWN buttons to enter a value.

Press SCROLL ENTER and the display will go to grpb for the second group.

If a second group is not desired the grpb setting should be set to zero. With a setting of zero. pressing scroll enter will bring back the setup 4 display. If a second group is used, it is done like the first group.

Setup 5 CH SCAN DELAY

At Setup 5 press SCROLL ENTER. The LCD will display the current display delay between channels during Normal Scan. This delay is also the update delay for the temperature readings. The channels are still scanned within 2 seconds and trip point comparisons are made, but the actual display of the temperature is delayed by this time:

Use the UP and DOWN buttons to enter the desired Channel Scan Delay value

(settable from 0 to 10 sec.). This is only for the display. Press the SCROLL

ENTER button to return to Setup 5. Press the UP button to go to Setup 6.

Installation TDXM-00065N page 7 of 12

Setup 6 CJ DISPLAY Selection

At Setpoint 6, press the SCROLL ENTER button. The LCD will display the Cold Junction Sensor Display setting:

SET UP continued using the UP and DOWN buttons. Once this is set, pressing SCROLL

ENTER will give the following display:

0 = Disable display

1 = °F

2 = °C

Use the UP and DOWN buttons to set the display or display units, then press SCROLL ENTER. Press the UP button to go to Setup 7.

This is the suffix for the unit number. It can be set from 0 - 9999 using the UP and DOWN buttons.

Within this, the unit number can be set up to 999999. The unit number is only displayed here, but is available as MODBUS registers for remote communications.

Setup 7 RTU / BAUD

At Setpoint 7, press the SCROLL ENTER button. The LCD will display the current RTU Node address assigned to the TDXM:

Use the UP and DOWN buttons to enter the desired RTU Node

Number. This is adjustable from 0-255. Press the SCROLL ENTER button. Next enter the baud rate and number of stop bits selection:

0 = 9600 Baud, N,8,1

1 = 19.2 KBaud, N,8,1

2 = 38.4 KBaud, N,8,1

3 = 9600 Baud, N,8,2

4 = 19.2 KBaud, N,8,2

5 = 38.4 KBaud, N,8,2

Use the UP and DOWN buttons to set the desired baud rate and number of stop bits. Press SCROLL ENTER to go back to Setpoint 7 display.

Press the UP button to go to Setup 8.

Setup 8 Unit Number

At Setpoint 8, press SCROLL ENTER the display will show:

This is the prefix for the unit number. It can be set from Ø (zero) to 99

Installation TDXM-00065N page 8 of 12

Installation TDXM-00065N page 9 of 12

Installation TDXM-00065N page 10 of12

Fig.2

1000

DEVIATION from AVERAGE

TDXM - Deviation from Average Calculations

This example is for a 6-cylinder engine.

Fig.1

"Deviation from Average"

Calculations 1

Absolute (1 – ((2+3+4+5+6)/5))

Absolute (2 – ((1+3+4+5+6)/5))

Absolute (3 – ((1+2+4+5+6)/5))

Absolute (4 – ((1+2+3+5+6)/5))

Absolute (5 – ((1+2+3+4+6)/5))

Absolute (6 – ((1+2+3+4+5)/5))

TDXM

Channels

3

4

1

2

5

6

Enabling Channel

grPA= 6 included included included included included included

Setpoint

Current

Notes:

1. Figure 1, these numbers represent the data from the channels. The values that are derived are not visible. The deviation from average calculation compares each channel to the rest of the group’s averaged value.

2. Figure 1, the setting group (grPA) selects how many channels are included, from channel 1 for the first group. the second group/starts with the first channel after the first group. These channels will be involved in the deviation from average calculation.

3. Figure 2, the "Setpoint" represents the enabling threshold (EnA or

Enb), The "Current" represents the enabling channel(s) (EChA or

EChb) (0=any channel in the group). When the enabling channel(s) exceed the enabling threshold, the deviation from average calculations will take place.

4. When a channel’s deviation exceeds the deviation (dEvA or dEvb) setpoint, the deviated channel will be recorded in the history.

Because of the flexible nature of the TDXM, the setup can cause conflicts, when settings are made. If there is a conflict which will cause problems in the Group/deviation function, there will be error codes displayed. The display will show one of the values below:

0

Grouping Errors

Group #1

Error 11 Channel 1 disabled.

Error 12 Too few channels.

Error 13 Inconsistent Engineering units.

Error 14 Channels skipped/disabled.

Error 15 Deviation value set to 0.

Troubleshooting Tips

If a temperature reading is incorrect, check the following:

1. Setup 1 – TC Type and Units correct?

2. Cold junction reading reasonable?

3. Install a jumper in place of the TC, should read the same as cold junction temperature.

4. Check for proper and recommended wiring practices.

A. Shielded thermocouple grade extension wire.

B. No splices involving metals other than TC type metals?

C. TC wire separation from other wiring.

5. Check for possible grounded thermocouple problems.

6. Check DC power voltage to see proper range of voltage and possible noise.

If the display shows all dashes (----------) it means all channels are set to ignore, and the cold junction display is disabled.

7. If the SP3 Latch model does not unlatch, check the following:

- Be sure the display is in the scan mode. The un-latch operation cannot be performed while viewing the history displays.

- Verify that the channel in the SP3 history has cleared. To do this exit the SP history and use the arrow keys to navigate to the channel in the scan display mode. Take note of the current temperature and press and hold Channel SP1-3 to verify the temperature setpoint SP3 for the channel. (see p-5 for mode details on

CHANNEL SP1-3 key function).

Group #2

Error 21 Channel 1 disabled.

Error 22 Too few channels.

Error 23 Inconsistent Engineering units.

Error 24 Channels skipped/disabled.

Error 25 Deviation value set to 0.

Error 26 Group size goes past the 24th channel.

CJ Error

If a cold junction sensor fails, the display will show: CJError. Output

3 (SP3. out) will be de-energize to the tripped state and SP1 out and

SP2 out will turn on. The SP1, SP2 and SP3 histories will show the number 61. The TDXM-DC will no longer scan channels or allow use of the keypad. If this happens, the unit should be replaced.

Installation TDXM-00065N page 11 of 12

Warranty

A limited warranty on materials and workmanship is given with this FW Murphy product.

A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm

www.fwmurphy.com

918.317.4100 Email: [email protected]

MURPHY, the Murphy logo are registered and/or common law trademarks of Murphy Industries, Inc. This document, including textual matter and illustrations, is copyright protected by Murphy Industries, Inc., with all rights reserved.

(c) 2006 Murphy Industries, Inc. Other third party product or trade names referenced herein are the property of their respective owners and are used for identification purposes only.

Installation TDXM-00065N page 12 of 12