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[SENSe]
Parameters
Comments
250 HP E1415 Command Reference
Parameter
Parameter
Name
Type
type
discrete (string)
sub_type
numeric (float32)
numeric (float32)
discrete (string)
range
numeric (float32)
ch_list
channel list (string)
•
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:
MAX (488µA)
MIN (30µA)
•
The <range> parameter: The HP E1415 has five ranges: .0625VDC, .25VDC,
1VDC, 4VDC, and 16VDC. To select a range, simply specify the range value
(for example, 4 selects the 4VDC range). If you specify a value larger than
one of the first four ranges, the HP E1415 selects the next higher range (for
example, 4.1 selects the 16VDC range). Specifying a value larger than 16
generates an error. Specifying 0 selects the lowest range (.0625VDC).
Specifying AUTO selects auto range. The default range (no range parameter
specified) is auto range.
•
If you are using amplifier SCPs, you should set them first and keep their
settings in mind when specifying a range setting. For instance, if your expected
signal voltage is to be approximately .1VDC and the amplifier SCP for that
channel has a gain of 8, you must set <range> no lower than 1VDC or an input
out-of-range condition will exist.
•
The sub_type parameter: values of 85 and 92 differentiate between 100 Ohm
(@ 0°C) RTDs with temperature coefficients of 0.00385 and 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 Kohms (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
Range of
Values
RTD | THERmistor | TCouple
for RTD use 85 | 92
for THER use 2250 | 5000 | 10000
for TC use CUSTom | E | EEXT |
J | K | N | R | S | T
see comments
100 - 163
for RTD and THER,2250
for THER,5000 and THER,10000
Default
Units
none
none
Ohms
none
VDC
none
Chapter 6
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