Specifications

OUTP:CURR:AMPL 30e-6, (@132:135)
set 4 channels to output 30 µA for 8 kW or greater resistances
SENS:FUNC:RES 30e-6, (@100:103)
link channels 0 through 4 to resistance EU conversion (8 kW or greater)
OUTP:CURR:AMPL 488e-6, (@136:139)
set 4 channels to output 488 µA for less than 8 kW resistances
SENS:FUNC:RES 488e-6, (@104:107)
link channels 4 through 7 to resistance EU conversion (less than 8 kW)
Linking Temperature
Measurements
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/°C temperature coefficients respectively)
·
For Thermistors; 2250, 5000, or 10000 (the nominal value of these devices
at 25 °C)
NOTES 3. 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
Temperature Sensor Types and
Subtypes
MAX (488 µA)
MIN (30 µA)
RTD,85 | 92 and THER,2250
THER,5000 | 10000
To set channels 0 through 7 to measure temperature using 2,250 ohm thermistors
(in this case paired to current source SCP channels 32 through 39):
Programming the VT1419A Multifunction
Plus
Setting Up Analog Input and Output Channels
Chapter 3 61
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