5.2.1.10
Standard Thermocouple Conversions
EDIT TCS 03
PROBE SER#: 1
CONVERSION: TC-K
CJC: INTERNAL
CJC TEMP: 0.0
CAL PTS: 3
T1: 500.0
$
NOTE:
An Application Note for use of Tungsten-Rhenium and other
thermocouples is available at www.hartscientific.com.
Standard thermocouple conversions include types B, E, J, K, N, R, S, T, and
gold-platinum (AU/PT). Voltage is converted to temperature using standard ref-
erence functions. (For additional information consult the publication
NIST
Monograph 175
.)
The gold-platinum thermocouple conversion uses a ninth-order polynomial
with the following coefficients:
c
0
= 0.0
c
1
= 6.03619861
c
2
= 1.93672974 X 10
–2
c
3
= –2.22998614 X 10
–5
c
4
= 3.28711859 X 10
–8
c
5
= –4.24206193 X 10
–11
c
6
= 4.56927038 X 10
–14
c
7
= –3.39430259 X 10
–17
c
8
= 1.42981590 X 10
–20
c
9
= –2.51672787 X 10
–24
You can specify internal or external cold-junction compensation (CJC) with the
CJC parameter. If CJC is specified as internal, the CJC TEMP value is read
from the thermocouple input and is updated automatically; there is no need to
set this value. With external CJC, a reference junction at a known fixed temper-
ature is used and the value of this fixed temperature reference is used to calcu-
late the absolute temperature of the thermocouple. The CJC TEMP parameter
must be set, in degrees C, to the temperature of the external reference. If CJC is
specified as internal, the CJC TEMP parameter is ignored.
41
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