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Operating instruction manual 

| TX Thermal Disperson Level Switches   17 

8.0  TEMPERATURE SWITCH OPTION

In the temperature switch configuration, the heater can be disabled and the active RTD is not used. The reference RTD 

is used to measure the temperature of the process medium. The resistance of the reference RTD is directly propor-

tional to temperature. The unit is shipped with the default settings unless otherwise stated on the order. A  temperature 

set point can be verified or changed by placing a resistance decade box across pins 1 & 2 of connector P2. Pin 1 is 

located closest to the edge of the board. Once the desired set point temperature has been decided, the resistance of 

the decade box can be used to set the point where the relay energizes (LED on):

TABLE 1

: OHMS / Deg. F for silicone temperature sensor

 - 

Standard

                Resistance calculation = [(0.0053(temp in degrees F) ²) + 3.4187(temp in degrees F) + 704.99] ohms.

TEMP F

0

+5

+10

+15

+20

+25

+30

+35

+40

+45

-50

547

562

577

592

607

623

639

655

671

688

0

705

722

740

757

775

794

812

831

850

870

50

889

909

929

950

970

991

1012

1034

1056

1078

100

1100

1122

1145

1168

1192

1215

1239

1263

1287

1312

150

1337

1362

1388

1413

1439

1466

1492

1519

1546

1573

200

1601

1629

1657

1685

1714

1743

1772

1801

1831

1861

250

1891

1921

1952

1983

2014

2046

2078

2110

2142

2175

300

2208

2241

2274

2308

2342

2376

2410

2445

2480

2515

350

2551

2587

2623

2659

2695

2732

2769

2807

2844

2882

TABLE 2

: OHMS / Deg. F - HIGH TEMP OPTION (/H1 or /H2): (Platinum RTD)

   Resistance calculation = [(-0.0002(temp in degrees F) ²) + 2.1288(temp in degrees F) + 932.05] ohms.

TEMP F

0

+10

+20

+30

+40

+50

+60

+70

+80

+90

-300

275.4

297.9

320.3

342.7

365

387.4

409.6

431.8

450

476.2

-200

498.3

520.4

542.4

564.4

586.3

608.2

630.1

651.9

673.7

695.5

-100

717.2

738.8

760.5

782.1

803.6

825.1

846.6

868.0

889.4

910.7

0

932.1

953.3

974.5

995.7

1016.9

1038.0

1059.1

1080.1

1101.1

1122.0

100

1142.9

1163.8

1184.6

1205.4

1226.2

1246.9

1267.5

1288.2

1308.8

1329.3

200

1349.8

1370.3

1390.7

1411.1

1431.4

1451.8

1472.0

1492.2

1512.4

1532.6

300

1552.7

1572.8

1592.8

1612.8

1632.7

1652.6

1672.5

1692.3

1712.1

1731.9

400

1751.6

1771.2

1790.9

1810.5

1830.0

1849.5

1869.0

1888.4

1907.8

1927.1

500

1946.5

1965.7

1984.9

2004.1

2023.3

2042.4

2061.5

2080.5

2099.5

2118.4

600

2137.3

2156.2

2175.0

2193.8

2212.6

2231.3

2249.9

2268.6

2287.2

2305.7

700

2324.2

2342.7

2361.1

2379.5

2397.8

2416.2

2434.4

2452.6

2470.8

2489.0

800

2507.1

2525.2

2543.2

2561.2

2579.1

2597.0

2614.9

2632.7

2650.5

2668.3

900

2686.0

2703.6

2721.3

2738.9

2756.4

2773.9

2791.4

2808.8

2826.2

2843.5

Example 1: At (-20 F) (Standard RTD) the resistance is 

639 

ohms  (see table1)

Example 2:  Using platinum RTD, the resistance at –20 °F is calculated as follows:

Set Point Resistance  =  (0.0002)(-20) ²  + 2.1288(-20) + 932.05  = 889.6 ohms   (Table 2 = 889.4 ohms)

With the resistance decade box connection across pins 1 & 2, adjust R18 until the LED just turns off. Decreasing the 

resistance of the decade box now will cause a drop in temperature and resistance, and the relay to energize and the 

LED to turn on.

State A is the default configuration 

for the relay from the factory. Other jumpers must be move to set the switch for 

temperature operation. The relay is de-energized (LED off) until the temperature drop below the set point. If it is de

-

sired that the relay energize when the temperature rises above the set point then configure JP3 for State B.

Summary of Contents for TX series

Page 1: ...v J Flow level granular solids and temperature switch K TEK Products Introduction This operating instruction manual provides the following information Calibration set point procedure see page 5 Config...

Page 2: ...Level Operation 13 5 3 Installation for Flow Rates Minimum and Maximum 13 5 4 Installation for Remote Electronics 14 5 5 Installation Setup 15 6 0 Flow Rate Detection 16 7 0 INTERFACE DETECTION 16 8 0...

Page 3: ...against the probes the molecules of the medium absorb more heat from the active sensor and the voltage differential begins to drop or as the flow rate increases the voltage differential will decrease...

Page 4: ...ol system If fail safe is to be incorporated the output relay and green LED should be energized at what is determined as the normal condition JP3 jumpers are used to determine the relay action vs the...

Page 5: ...ower values 3 1 Calibrate from HIGH TC Thermal Conductivity process conditions as follows JP3 State A Green LED output relay energized at NORMAL condition High Thermal Conductivity low differential te...

Page 6: ...hermal Conductivity process condition high level level above sensor high flow condition at the sensor Green LED and output relay will be de energized after calibration adjust ments 2 Allow 5 minutes m...

Page 7: ...a combination of level and temperature or flow and temperature with the dual switch point option With the dual switch point option board the flow rate of a process can be monitored with the millivolt...

Page 8: ...witch set for Level or Air Flow Fail Safe High Level or High Flow JP3 Relay set for State B Energizes when dry or below flow set point above setting of R18 Two Jumpers x 2mm Switch set for Temperature...

Page 9: ...rgized LED On Fail Safe WET or Air Flow Set Point Normal Condition DRY or Air Flow Set Point Normal Condition Relay De energized LED OFF DRY or Air Flow Set Point Normal Condition WET or Air Flow Set...

Page 10: ...the delta voltage The output has an inverse relationship to flow and is not linear the output voltage decreases as flow increases The amplified output does not apply when used as a temperature switch...

Page 11: ...ation Condition State A State B Relay Energized LED On DRY or Air Flow Set Point WET or Air Flow Set Point Relay De energized LED OFF WET or Air Flow Set Point DRY or Flow Set Point LEVEL OR AIR FLOW...

Page 12: ...leg used to mount the instrument be the same as the instrument connec tion size 1 MNPT type The standard instrument 1 8 inch will fit in a 1 X 1 X 1 or larger tee The 1 2 inch option units are availa...

Page 13: ...and Maximum This switch can be also be configured to detect between a minimum or a maximum flow rate or a minimum maximum temperature With the dual circuit board option the unit can also detect a flow...

Page 14: ...perature that exceeds the maximum operating temperature 140 F or 65 C of the electronics module The remote housing simply contains a terminal block interface for a cable which connects to another hous...

Page 15: ...it in a tee the tee size should be the same size as the line or smaller A larger diameter tee will allow the water to expand and cause false trip to occur because of vortices and or eddy currents The...

Page 16: ...nse time is needed the TQ version may be the solution For small flow rates the IX or IM in line unit would be the option The delta voltage will decrease With the dual switch point top board the delta...

Page 17: ...40 50 60 70 80 90 300 275 4 297 9 320 3 342 7 365 387 4 409 6 431 8 450 476 2 200 498 3 520 4 542 4 564 4 586 3 608 2 630 1 651 9 673 7 695 5 100 717 2 738 8 760 5 782 1 803 6 825 1 846 6 868 0 889 4...

Page 18: ...del 141mV TQ Model 140mV TS Model 460mV IX Model 110mV Water TX HO Model 30mV H1 H2 Model 10mV TQ Model 25mV TS Model 90mV IX Model 15mV 9 2 1 With power disconnected measure resistance of Heater and...

Page 19: ...Operating instruction manual TX Thermal Disperson Level Switches 19 10 0 APPENDIX A Instrument Rangeability 10 1 TX Series 10 2 IX Series...

Page 20: ...vel Switches Operating instruction manual 11 0 APPENDIX B Conversion Table Examples Example 1 100 CFM in 4 line 100 x 1884 18 84 F P S Example 2 10 G P M in 3 line 10 x 0434 434 F P S Test Conditions...

Page 21: ...tion H1 320 F 500 F RED RED WHT BLK GRN SEE WIRE MARKERS Special Temperature Range Option H2 100 F 900 F TERMINAL NUMBER 1 2 3 4 5 HTR HTR ACT COM REF Integral Electronics RED RED YEL BLK GRN Remote E...

Page 22: ...3 0 APPENDIX D TX Heating vs Dispersion Above is a graph of the model TX probe The longer line depicts the time response of the RTD by internal heating The shorter line depicts the delta voltage or de...

Page 23: ...h were not the result of either alterations misuse abuse improper or inadequate adjustments applications or servicing of the product ABB s warranty does not include onsite repair or services Field ser...

Page 24: ...vel Switches Operating instruction manual 15 0 CUSTOMER SUPPORT ABB USA Canada International 18321 Swamp Road Prairieville LA 70769 USA Tel 1 225 673 6100 Fax 1 225 673 2525 Email service ktekcorp com...

Page 25: ...Data Sheets MSDS and decontamination tags by affixing these documents in close proximity to the shipment label for identification purposes January 18 2006 Return Authorization Form Customer Date Cont...

Page 26: ...26 TX Thermal Disperson Level Switches Operating instruction manual...

Page 27: ...Operating instruction manual TX Thermal Disperson Level Switches 27...

Page 28: ...ble lack of information in this document We reserve all rights in this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or utilizatio...

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