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Linking Temperature
Measurements
NOTES
Chapter 3
SENS:FUNC:RES 488e-6, (@116,120,124:132)
link channels 16, 20 and 24 through 32 to resistance EU conversion (less than
8KΩ)
To link channels to temperature EU conversion send the
[SENSe:]FUNCtion:TEMPerature <type>, <sub_type>,
[<range>,](@<ch_list>) command.
•
The ch_list parameter specifies which channel(s) to link to the
temperature EU conversion.
•
The type parameter specifies RTD, THERmistor, or TC (for
ThermoCouple)
•
The optional range parameter can be used to choose a fixed A/D
range. When not specified (defaulted), the module uses auto-range.
RTD and Thermistor Measurements
Temperature measurements using resistance type sensors involve all the
same considerations as resistance measurements discussed in the previous
section. See the discussion of Figure 3-4 in "Linking Resistance
Measurements".
For resistance temperature measurements the sub_type parameter specifies:
•
For RTDs; "85" or "92" (for 100 Ohm RTDs with 0.00385 or 0.00392
Ohms/Ohm/Degree C temperature coefficients respectively)
•
For Thermistors; 2250, 5000, or 10000 (the nominal value of these
devices at 25 degrees C)
1. Resistance temperature measurements (RTDs and THERmistors)
require the use of Current Source Signal Conditioning Plug-Ons. The
following table shows the Current Source setting that must be used
for the following RTDs and Thermistors:
Required Current
Amplitude
MAX (488µA)
MIN (30µA)
2. sub_type values of 2250, 5000, and 10000 refer to thermistors that
match the Omega 44000 series temperature response curve. These
44000 series thermistors have been selected to match the curve within
°
0.1 or 0.2
C.
Programming the HP E1415 for PID Control
Temperature Sensor Types
and Subtypes
RTD,85 | 92 and THER,2250
THER,5000 | 10000
67
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