HEL-705-T-1-12-00

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**Temperature Sensors** Platinum RTDs 

HEL-700 Series 

## **FEATURES** 

> e Linear resistance vs temperature re Accurate and Interchangeable Excellent stability Teflon or fiberglass lead wires Wide temperature range Ceramic case material 

## **TYPICAL APPLICATIONS** 

HEL-700 Series elements are fully assembled, ready to use directly or in probe assemblies without the need for fragile splices to extension leads. 

The 1000 , 375 alpha version, provides 10X greater sensitivity and signal-tonoise. Optional NIST calibrations improve accuracy to ±0.03 ° C at 0 ° C. 

e HVAC – room, duct and refrigerant equipment e Instrument and probe assemblies – temperature compensation Process control – temperature regulation 

## **ORDER GUIDE** 

**HEL-705** 28 ga. TFE Teflon, 2-wire only ~~ee~~ **HEL-707** 28 ga. Fiberglass, 2-wire only ~~*~~ **HEL-711** 28 ga. TFE Teflon (2-wire 1000 , 3-wire 100 ) **HEL-712** 28 ga. Fiberglass (2-wire 1000 , 3-wire 100 ) ~~PO~~ **HEL-716** 24 ga. TFE Teflon (2-wire 1000 , 3-wire 100 ) ~~es © © |~~ **HEL-717** 24 ga. Fiberglass (2-wire 1000 **-U** 1000 , 0.00375 / / ° C , 3-wire 100 ) ~~a 0~~ **-T** 100 , 0.00385 / / ° C DIN Standard ~~es~~ **-0** ±0.2% Resistance Trim (Standard) **-1** ±0.1% Resistance Trim (Optional) ~~PO~~ **-12** Lead wire length, 12 inches ~~ee~~ **-00** No NIST calibration ~~ee a ee~~ **-C1** NIST @ 0 ° C ~~a~~ **-C2** NIST @ 0 & 100 ° C ~~|~~ **-C3** NIST @ 0, 100 & 260 ° C 

## **MOUNTING DIMENSIONS** (for reference only) 

## **Fig. 1: Wheatstone Bridge 2-Wire Interface** 

**Fig. 2: Linear Output Voltage** 

## **Fig. 3: Adjustable Point (Comparator) Interface** 

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## **CAUTION** 

## PRODUCT DAMAGE 

The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take normal ESD precautions when handling this product. 

Honeywell ; Sensing and Control e 1-800-537-6945 USA e+ 1-815-235-6847 International ° 1-800-737-3360 Canada 

**87** 

HEL-700 Series 

## **Temperature Sensors** Platinum RTDs 

## **FUNCTIONAL BEHAVIOR** 

RT R0(1+AT+BT[2] −100CT[3] +CT[4] ) RT = Resistance ( Q ) at temperature T ( ° C) R0 = Resistance ( oO ) at 0 ° C T = Temperature in ° C A =a + ~~ad~~ B = − ~~ad~~ CT<0 = − 100 100[2] 100[4] 

## **CONSTANTS** 

|**Alpha,**<br>a|(°C-1)||0.00375|0.003850|
|---|---|---|---|---|
||||±0.000029|±0.000010|
|**Delta,**<br>(°C)<br>5|||1.605±0.009|1.4999±0.007|
|**Beta,**<br>(°C)<br>B|||0.16|0.10863<br>~~a~~|
|**A**(°C-1)|||3.81×10-3|3.908×10-3|
|**B**(°C-2)|||−6.02×10-7|−5.775×10-7|
|**C**(°C-4)|||−6.0×10-12|−4.183×10-12|
|Both<br>B=|0 and C|0 and C<br>=|0 for T>0°C||



## **RESISTANCE VS TEMPERATURE CURVE** 

## **ACCURACY VS TEMPERATURE** 

|**ACCURACY VS TEMPERATURE**|**ACCURACY VS TEMPERATURE**|**ACCURACY VS TEMPERATURE**|**ACCURACY VS TEMPERATURE**|**ACCURACY VS TEMPERATURE**|
|---|---|---|---|---|
|**Tolerance**<br>**Standard**±**0.2%**<br>**Optional**±**0.1%**<br>Temperature<br>± R*<br>± T<br>± R*<br>± T<br>(°C)<br>( )<br>(°C)<br>( )<br>(°C)<br>~~oe~~<br>A<br>A<br>A<br>A<br>QO<br>QO|||||
|−200|6.8|1.6|5.1|1.2|
|−100|2.9|0.8|2.4|0.6|
|0|2.0|0.5|1.0|0.3|
|100|2.9|0.8|2.2|0.6|
|200|5.6|1.6<br>~~ee~~|4.3<br>~~ee~~|1.2<br>~~ee~~|
|300|8.2|2.4|6.2|1.8|
|400|11.0|3.2|8.3|2.5|
|500|12.5|4.0|9.6<br>~~a~~|3.0<br>~~a~~|
|600|15.1|4.8|10.4|3.3|



> *1000 Oo RTD. Divide A by 10 for 100 Oo RTD. 

## **NIST CALIBRATION** 

NIST traceable calibration provides resistance readings at 1, 2 or 3 standard temperature points to yield a resistance versus temperature curve with 10x better accuracy. 

||**Calibration**<br>**1 Point**<br>**2 Point**<br>**3 Point**|
|---|---|
|T(°C)<br>± T(°C)<br>± T(°C)<br>± T(°C)<br>-200<br>0.9<br>—<br>—<br>-100<br>0.5<br>0.27<br>0.15<br>0<br>0.03<br>0.03<br>0.03<br>~~A~~<br>~~A~~<br>~~A~~<br>~~a~~<br>~~a~~<br>~~CC~~||
||100<br>0.4<br>0.11<br>0.07<br>200<br>0.8<br>0.2<br>0.08<br>~~oO~~|
||300<br>1.2<br>0.33<br>6.2|
||400<br>1.6<br>0.5<br>8.3|
||500<br>2.0<br>0.8<br>9.6<br>600<br>2.6<br>1.2<br>10.4<br>~~CCC~~<br>~~__o~~<br>~~oo~~|



## **SPECIFICATIONS** 

|**SPECIFICATIONS**||||
|---|---|---|---|
|Sensor Type|||Thin film platinum RTD;|
||||R0<br>1000<br>@ 0°C; alpha<br>0.00375 / /°C<br>R0<br>100<br>@ 0°C; alpha<br>0.00385 / /°C<br>=<br>10)<br>=<br>Loe)<br>=<br>QO<br>=<br>20|
|Temperature Range|||TFE Teflon:−200°to+260°C (−320°to+500°F)|
||||Fiberglass:−75°to+540°C(−100°to+1000°F)|
|Temperature Accuracy|||±0.5°C or 0.8% of temperature,°C (R0±0.2% trim), whichever is greater|
||||±0.3°C or 0.6% of temperature,°C(R0±0.1% trim), whichever isgreater(optional)|
|Base Resistance and|||1000±2<br>(±0.2%) @ 0°C<br>QO|
|Interchangeability, R0±|A|R0|1000±1<br>(±0.1%)@ 0°C(optional)<br>QO|
|Linearity|||±0.1% of full scale for temperatures spanning−40°to+125°C|
||||±2.0% of full scale for temperatures spanning −75°to+540°C|
|Time Constant|||<0.5 sec. 0.85 inch O.D. in water at 3 ft/sec;<1.0 sec, 0.85 inch O.D. in still water|
|OperatingCurrent|||2 mA maximum for self heatingerrors of<1°C; 1 mA recommended|
|Stability|||<0.25°C/year; 0.05°Cper 5years in occupied environments|
|Self Heating|||<15 mW/°C for 0.85 O.D. typical|
|Insulation Resistance|||>50 M<br>at 50 VDC at 25°C<br>QO|
|Construction|||Alumina case; Epoxy potting (Teflon leads); Ceramicpotting (fiberglass leads)|
|Lead Material|||Nickel coated stranded copper, Teflon or Fiberglass insulated|



**88** Honeywell e Sensing and Control ) 1-800-537-6945 USA @+ 1-815-235-6847 International ) 1-800-737-3360 Canada