platinum temp sensor (PT1000) used for calibration of AD590 on PSL table:
Callendar-Van Dusen Equation:
RT = R0(1+AT+BT2-100CT3+CT4)
RT = Resistance at temperature T (°C)
R0 = Resistance at 0°C
T = Temperature in °C
CALLENDAR-VAN DUSEN CONSTANTS
| Alpha, a (°C-1) |
.003750 ± .00003 |
.003850 ± .0001 |
| Delta, d (°C) |
1.605 ± 0.009 |
1.4999 ± 0.007 |
| Beta, b* (°C) |
0.16 |
0.10863 |
| A (°C-1) |
3.81*10e-3 |
3.908*10e-3 |
| B (°C-2) |
-6.02 *10e-7 |
-5.775*10e-7 |
| C (°C-4)* |
-6.0*10e-12 |
-4.183*10e-12 |
*Both b =0 and C=0 for T>0°C
source: http://content.honeywell.com/sensing/prodinfo/temperature/technical/c15_136.pdf
online calculator: http://www.isotech.co.uk/prtcalc-web.html
measured resistance: 1083.9Ohm = 21.55C
calibration offsets for chamber sensors:
S1: +0.75K
S2: 0
S3: -0.11
S4: +0.88
room temp sensors:
ACAV_AMB1 : +0.2
ACAV_AMB2: -0.3 |