HP E1419A User Manual page 63

Linking Temperature
Measurements
NOTES
62 Programming the HP E1419A
To set channels 0 through 3 to measure resistances greater than 8,000 Ohms
and set channels 4 through 7 to measure resistances less than 8K (in this
case paired to current source SCP channels 32 through 39):
OUTP:CURR:AMPL 30e-6, (@132:135)
set 4 channels to output 30µA for 8KΩ or greater resistances
SENS:FUNC:RES 30e-6, (@100:103)
link channels 0 through 4 to resistance EU conversion (8KΩ or greater)
OUTP:CURR:AMPL 488e-6, (@136:139)
set 4 channels to output 488µA for less than 8KΩ resistances
SENS:FUNC:RES 488e-6, (@104:107)
link channels 4 through 7 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 3-6 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:
Chapter 3