...
Resistance values measured 15 Apr 2011 using 4-wire meter:
ID | Sensor S/N | R_measured (Ohms) | R_manufacturer (Ohms) | Difference (Ohms) |
|---|---|---|---|---|
1 | 200589 | 16.14 | 16.1 | 0.04 |
2 | 200590 | 15.40 | 15.4 | 0.00 |
3 | 200236 | 14.79 | 14.8 | -0.01 |
4 | 200591 | 16.70 | 16.7 | 0.00 |
5 | 200239 | 16.37 | 16.2 | 0.17 |
6 | 200592 | 15.53 | 15.5 | 0.03 |
7 | 200241 | 16.27 | 16.2 | 0.07 |
8 | 200242 | 16.10 | 15.9 | 0.20 |
9 | 200243 | 15.76 | 15.6 | 0.16 |
10 | 200234 | 14.72 | 14.7 | 0.02 |
11 | 200238 | 15.50 | 15.4 | 0.10 |
| 200235 | sliced ? | 14.8 |
|
| 200240 | lightning fried | 15.0 |
|
All are within 0.2 ohms of manufacturer values. Except for one at 0.01 ohms, our values are higher. <Might> be connectors, but 4-wire measurement should compensate.
Agar results (first row Sep 2010, second row Apr 2011). Lambda values use original Hukseflux coefficients in this table:
ID | Sensor | Vheat (uV) | Vpile.on (uV) | Vpile.off (uV) | V63 (uV) | Tau63 (0.01s) | Lambda (mW/m K) | ||
|---|---|---|---|---|---|---|---|---|---|
| Expected | 1200000 |
| 0 |
| 1900 | 600 | ||
1 | 200589 | 1236927 | 375 | 0 | 139 | 1943 | 666 | ||
|
| 1236416 1236402 | 375 | 0 | 139 | 1921 1916 | 665 | ||
2 | 200590 | 1194264 | 314 | 0 | 116 | 1940 | 668 | ||
|
| 1194652 | 314 | 0 | 116 | 1985 | 669 | ||
3 | 200236 | 1238958 | 313 | 0 | 116 | 1877 | 578 | ||
|
| 1237230 | 313 | 0 | 116 | 1892 | 576 | ||
4 | 200391 | 1240328 | 313 | 0 | 116 | 2073 | 686 | ||
|
| 1239126 | 313 | 0 | 115 | 2042 | 684 | ||
5 | 200239 | 1239719 | 470 | 0 | 174 | 1965 | 591 | ||
|
| 1238975 | 470 | 0 | 173 | 1972 | 590 | ||
6 | 200592 | 1237441 | 407 | 0 | 150 | 2125 | 655 | ||
|
| 1237288 | 407 | 0 | 150 | 2170 | 655 | ||
7 | 200241 | 1241515 | 376 | 0 | 139 | 1892 | 596 | ||
|
| 1239874 | 376 | 0 | 139 | 1867 | 595 | ||
8 | 200242 | 1236806 | 407 | 0 | 150 | 2089 | 600 | ||
|
| 1236332 | 407 | 0 | 150 | 2105 | 600 | ||
9 | 200243 | 1236372 | 438 | 0 | 162 | 1746 | 598 | ||
|
| 1236324 | 438 | 0 | 162 | 1755 | 598 | ||
10 | 200234 | 1237511 | 281 | 0 | 104 | 1679 | 603 | ||
|
| 1237304 | 281 | 0 | 104 | 1673 | 603 | ||
11 | 200238 | 1238329 | 439 | 0 | 162 | 1773 | 586 | ||
|
| 1236740 | 439 | 0 | 162 | 1792 |
|
| 584 |
All of these have very close agreement between the Sept 2010 and Apr 2011 values. Tau63 differences are 0-0.5s, Lambda differences are 0-2. Thus, best approach is to take the average of these values to generate new Tau63_ref and E.lambda values.