Tcouple:type <Name - Keithley 2001 Operator's Manual

IEEE-488 Reference
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RTD coefficients to Model 2001 coefficients
Coefficients
Subrange #1: 13.8033K - 273.16K
Subrange #2: 24.5561K - 273.16K
Subrange #3: 54.3584K - 273.16K
Subrange #4: 83.8058K - 273.16K
Subrange #5: 234.3156K - 302.9146K
Subrange #6: 273.15K - 1234.93K
Subrange #7: 273.15K - 933.473K
Subrange #8: 273.15K - 692.677K
Subrange #9: 273.15K - 505.078K
Subrange #10: 273.15K - 429.748K
Subrange #11: 273.15K - 302.9146K
Programming example
4.19.21 :TCouple:TYPE <name>
Parameters
4-156
must be translated into Model 2001 values as summarized in the table below. See
3.4.5 in Section 3 for more information.
RTD coefficients to Model 2001 coefficients
Not applicable
A2 to A4, B2 to B4
A3 to A4, B3 to B4
No substitution needed
A5 to A4, A5 to A7, B5to B4, B5 to B7, Set C7 = 0. A5 value entered
for both A4 and A7, B5 entered for both B4 and B7.
Not applicable
No substitution needed
A8 to A7, B8 to B7, Set C7 = 0
A9 to A7, B9 to B7, Set C7 = 0
A10 to A7, B10 to B7, Set C7 = 0
A11 to A7, Set B7 = 0, C7 = 0
Suppose you are using an SPRTD that has been calibrated for subrange #2 above that is
calibrated for measurements between 24.5561 and 273.16K. Model 2001, however supports
only SPRTD temperatures down to 83.805K, so temperatures below this value will be reported
as an overflow even though the SPRTD is capable of measuring lower. The calibration
certificate lists A2, B2, C1, C2, and C3 as the calibration coefficients. You can set up Model
2001 for this measurement as follows:
1. Set the temperature sensor type to FRTD (4-wire measurement) by sending:
:SENS1:TEMP:TRAN FRTD
2. Choose the RTD type as SPRTD:
:SENS1:TEMP:RTD:TYPE SPRTD
3. Set the RTD sensor 0°C resistance value:
:SENS1:TEMP:RTD:SPRTD:RZER <R_zero>
4. Set the A4 coefficient to the RTD certificate value for A2:
:SENS1:TEMP:SPRTD:A4 <certificate_A2_value>
5. Set the B4 coefficient to the RTD certificate value for B2:
:SENS1:TEMP:SPRTD:B4 <certificate_B2_value>
Note that the A7, B7, and C7 values will not be used for this sensor.
6. Change to the temperature function, and begin taking readings.
[:SENSe[1]]:TEMPerature:TCouple:TYPE <name>Specify TC type
<name> = J
= T
= K
= E
= R
= S
Set operation for Type J thermocouples
Set operation for Type T thermocouples
Set operation for Type K thermocouples
Set operation for Type E thermocouples
Set operation for Type R thermocouples
Set operation for Type S thermocouples
paragraph
2001-900-01 Rev. K / August 2010