VXI VT1422A - Manual (Page 354)

352 VT1422A Command Reference Chapter 7
[SENSe]
•
If using amplifier SCPs, set them first and keep their settings in mind when
specifying a range setting. For instance, if the expected signal voltage is to be
approximately 0.1 V dc and the amplifier SCP for that channel has a gain of 8,
<range> must be set no lower than 1 V dc or an input out-of-range condition
will exist.
•
The <sub_type> parameter: values of 85 and 92 differentiate between 100
Ω (@
0
°C) RTDs with temperature coefficients of 0.00385 and 0.00392 ohm/ohm/°C
respectively. The <sub_type> values of 2250, 5000, and 10000 refer to
thermistors that match the Omega 44000 series temperature response curve.
These 44000 series thermistors are selected to match the curve within 0.1 or
0.2
°C. For thermistors, <sub_type> may be specified in kΩ (kohm).
The <sub_type> EEXTended applies to E type thermocouples at 800
°C and
above.
CUSTom is pre-defined as Type K, with no reference junction compensation
(reference junction assumed to be at 0
°C).
•
The *CAL? command calibrates temperature channels based on Current Source
SCP and Sense Amplifier SCP setup at the time of execution. If SCP settings
are changed, those channels are no longer calibrated. *CAL? must be executed
again.
•
See “Linking Input Channels to EU Conversion” on page 109.
•
When Accepted: Not while INITiated
•
Related Commands: *CAL?, OUTP:CURR (for RTDs and Thermistors),
SENS:REF and SENS:REF:TEMP (for Thermocouples)
•
*RST Condition: SENSE:FUNC:VOLT AUTO on all channels and bridges set
to FBEN on all strain channels
•
Send with VXIplug&play Function: hpe1422_cmd(...)
Usage
Link two channels to the K type thermocouple temperature conversion
SENS:FUNC:TEMP TCOUPLE,K,(@101,102)
Link channel 0 to measure reference temperature using 5k thermistor
SENS:REF THER,5000,(@100)