Campbell Scientific CR10TCR Thermocouple Reference - Manual (Page 7)

CR10TCR THERMOCOUPLE REFERENCE
3
TABLE 3. Temperature, Resistance, and
Datalogger Output
Temperature Resistance Output
°C
OHMS
°C
-40.00 4067212 -39.18
-38.00 3543286 -37.55
-36.00 3092416 -35.83
-34.00 2703671 -34.02
-32.00 2367900 -32.13
-30.00 2077394 -30.18
-28.00 1825568 -28.19
-26.00 1606911 -26.15
-24.00 1416745 -24.11
-22.00 1251079 -22.05
-20.00 1106485 -20.00
-18.00 980100 -17.97
-16.00 869458 -15.95
-14.00 772463 -13.96
-12.00 687276 -11.97
-10.00 612366 -10.00
-8.00 546376 -8.02
-6.00 488178 -6.05
-4.00 436773 -4.06
-2.00 391294 -2.07
0.00 351017 -0.06
2.00 315288 1.96
4.00 283558 3.99
6.00 255337 6.02
8.00 230210 8.04
10.00 207807 10.06
12.00 187803 12.07
14.00 169924 14.06
16.00 153923 16.05
18.00 139588 18.02
20.00 126729 19.99
22.00 115179 21.97
24.00 104796 23.95
26.00 95449 25.94
28.00 87026 27.93
30.00 79428 29.95
32.00 72567 31.97
34.00 66365 33.99
36.00 60752 36.02
38.00 55668 38.05
40.00 51058 40.07
42.00 46873 42.07
44.00 43071 44.05
46.00 39613 46.00
48.00 36465 47.91
50.00 33598 49.77
52.00 30983 51.59
54.00 28595 53.35
56.00 26413 55.05
58.00 24419 56.70
60.00 22593 58.28
TABLE 4. Polynomial Coefficients
Coefficient Value
C0 -53.4601
C1 90.807
C2 -83.257
C3 52.283
C4 -16.723
C5 2.211
6. ELECTRICALLY NOISY
ENVIRONMENTS
AC power lines can be the source of electrical
noise. If the datalogger is in an electronically
noisy environment, the CR10TCR temperature
measurement should be measured with the AC
half bridge (Instruction 5) with the 60 Hz rejection
integration option on the CR10 (see Section 13
of the datalogger manual for more information
on noise). Instruction 11's fast integration will
not reject 60 Hz noise.
Example 2. Sample CR10 Instructions Using
AC Half Bridge
01: P5 AC Half Bridge
01: 1 Rep
02: 22 7.5 mV 60 Hz rejection Range
03: 1 IN Chan
04: 3 Excite all reps w/EXchan 1
05: 2000 mV Excitation
06: 15* Loc [:Ref_Temp]
07: 800 Mult
08: 0 Offset
02: P55 Polynomial
01: 1 Rep
02: 1* X Loc Air Temp
03: 15* F(X) Loc [:Ref_Temp]
04: -53.46 C0
05: 90.807 C1
06: -83.257 C2
07: 52.283 C3
08: -16.723 C4
09: 2.211 C5
* Proper entries will vary with program and
input location assignments.