IRTS-P Precision Infrared Temperature Sensor Revision: 9/06 C o p y r i g h t © 2 0 0 2 - 2 0 0 6 C a m p b e l l S c i e n t i f i c , I n c . A p o g e e I n s t r u m e n t s , I n c .
Warranty and Assistance The IRTS-P PRECISION INFRARED TEMPERATURE SENSOR is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
IRTS-P Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. General Description.....................................................1 2. Specifications ..............................................................1 3. Installation....................................................................2 4. Wiring............................................................................3 5.
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IRTS-P Precision Infrared Temperature Sensor 1. General Description An infrared temperature sensor (IRTS) is a non-contact means of measuring the surface temperature of an object by sensing the infrared radiation given off. IRTS are widely used for measurements of leaf, canopy, and average surface temperature. With contact sensors it is difficult to avoid influencing the temperature, maintain thermal contact, and provide a spatial average.
IRTS-P Precision Infrared Temperature Sensor 3. Installation The field of view for infrared sensors is calculated based on the geometry of the sensor and lens. However, optical and atmospheric scatter and unwanted reflections from outside the field of view may influence the measurement. Under typical conditions, 80 to 90 percent of the IR signal is from the field of view and 10 to 20 percent is from the area surrounding the field of view.
IRTS-P Precision Infrared Temperature Sensor 4. Wiring The IRTS-P has two thermocouple outputs. Each output is a pair of red and yellow wires. The pair labeled “Target” on the jacket near the wires is the output from the detector. The pair labeled “Body” is a thermocouple measuring the temperature of the sensor body. Previous versions of the sensor had a black band on the target cable to mark it. We recommend measuring the temperatures with differential voltage thermocouple measurements.
IRTS-P Precision Infrared Temperature Sensor PSB = 49.9092 + 0.59237 ⋅ SB + 0.00558 ⋅ SB 2 H SB = 4.2828 + 0.4248 ⋅ SB − 0.00077 ⋅ SB 2 K SB = 52.0705 − 5.3816 ⋅ SB + 0.387 ⋅ SB 2 and SB = Sensor Body Temperature The three example programs measure the sensor once a second and output average sensor and target temperatures once an hour. In an actual installation the measurement and output intervals, and channels used may be changed to accommodate the other measurements and outputs. TABLE 5-1.
IRTS-P Precision Infrared Temperature Sensor 2: Thermocouple Temp (DIFF) (P14) 1: 1 Reps 2: 21 2.5 mV 60 Hz Rejection Range 3: 2 DIFF Channel 4: 3 Type K (Chromel-Alumel) 5: 1 Ref Temp (Deg. C) Loc [ RefTemp ] 6: 2 Loc [ AppTargT ] 7: 1.0 Mult 8: 0.0 Offset ;Measure Sensor Body Temp 3: Thermocouple Temp (DIFF) (P14) 1: 1 Reps 2: 21 2.5 mV 60 Hz Rejection Range 3: 3 DIFF Channel 4: 3 Type K (Chromel-Alumel) 5: 1 Ref Temp (Deg. C) Loc [ RefTemp ] 6: 3 Loc [ SenBodyT ] 7: 1.0 Mult 8: 0.
IRTS-P Precision Infrared Temperature Sensor ;Calculate correction factor (SEC) 7: Z=1/X (P42) ; {1/Psb} 1: 4 X Loc [ Psb 2: 4 Z Loc [ Psb ] ] 8: Z=X*F (P37) ; 1: 4 2: 0.25 3: 4 {.
IRTS-P Precision Infrared Temperature Sensor *Table 2 Program 02: 0.
IRTS-P Precision Infrared Temperature Sensor ;Calculate P, H, & K Coefficients 4: Polynomial (P55) 1: 1 Reps 2: 3 X Loc [ SenBodyT ] 3: 4 F(X) Loc [ Psb ] 4: 49.9092 C0 5: 0.59237 C1 6: 0.00558 C2 7: 0.0 C3 8: 0.0 C4 9: 0.0 C5 5: Polynomial (P55) 1: 1 Reps 2: 3 X Loc [ SenBodyT ] 3: 5 F(X) Loc [ Hsb ] 4: 4.2828 C0 5: 0.4248 C1 6: -0.00077 C2 7: 0.0 C3 8: 0.0 C4 9: 0.0 C5 6: Polynomial (P55) 1: 1 Reps 2: 3 X Loc [ SenBodyT ] 3: 6 F(X) Loc [ Ksb ] 4: 52.0705 C0 5: -5.3816 C1 6: 0.387 C2 7: 0.0 C3 8: 0.
IRTS-P Precision Infrared Temperature Sensor 11: Z=X-Y (P35) ; 1: 5 2: 6 3: 6 {subtract Ksb} X Loc [ Hsb ] Y Loc [ Ksb ] Z Loc [ Ksb ] 12: Z=X*Y (P36) ; {calculate SEC} 1: 4 X Loc [ Psb ] 2: 6 Y Loc [ Ksb ] 3: 7 Z Loc [ SEC ] ;Calculate corrected target temperature (CTT) 13: Z=X-Y (P35) ; 1: 2 X Loc [ AppTargT ] 2: 7 Y Loc [ SEC ] 3: 8 Z Loc [ CTT ] 14: If time is (P92) 1: 0 Minutes (Seconds --) into a 2: 60 Interval (same units as above) 3: 10 Set Output Flag High (Flag 0) 15: Real Time (P77) 1: 1220 Ye
IRTS-P Precision Infrared Temperature Sensor CR1000 Example Program 'CR1000 Dim SB, Psb, Hsb, Ksb, SenEC Public PTemp_C, ATT_C, CTT_C DataTable(IRTS-P,True,-1) DataInterval(0,60,Min,0) Average(1,ATT_C,IEEE4,0) Average(1,CTT_C,IEEE4,0) EndTable BeginProg Scan(1,Sec,1,0) 'Wiring Panel Temperature measurement PTemp_C: PanelTemp(PTemp_C,_60Hz) 'IRTS-P Precision Infrared Temperature Sensor measurements ATT_C and CTT_C: 'Measure apparent target temperature with IRTS-P.
IRTS-P Precision Infrared Temperature Sensor CR5000 Example Program Public RefT, TargetCorrT, TC(2), SensorCorr, Psb, Hsb, Ksb Alias TC(1) = TargetApparentT Alias TC(2) = SensorBodyT DataTable (AllDat,1,-1) DataInterval (0,60,Min,10) Average (1,RefT,FP2,0) Average (2,TC(),IEEE4,0) Average (1,TargetCorrT,IEEE4,0) EndTable BeginProg Scan (1,Sec,3,0) PanelTemp (RefT,250) TCDiff (TC(),2,mV20C ,1,TypeK,RefT,True ,0,_60Hz,1.0,0) Psb = 49.9092 + 0.59237 * SensorBodyT - 0.00558 * SensorBodyT^2 Hsb = 4.2828 + 0.
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