Section 8: TSP command reference
Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
8-174
DMM7510-901-01 Rev. B / May 2015
dmm.measure.opendetector
This attribute determines if the detection of open leads is enabled or disabled.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW) Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
4W Res: dmm.OFF
Temperature: dmm.ON
Usage
state
= dmm.measure.opendetector
dmm.measure.opendetector =
state
state
Disable open lead detector:
dmm.OFF
Enable open lead detector:
dmm.ON
Functions
dmm.FUNC_DC_VOLTAGE
dmm.FUNC_RESISTANCE
dmm.FUNC_ACV_FREQUENCY
dmm.FUNC_AC_VOLTAGE
dmm.FUNC_4W_RESISTANCE
dmm.FUNC_ACV_PERIOD
dmm.FUNC_DC_CURRENT
dmm.FUNC_DIODE
dmm.FUNC_DCV_RATIO
dmm.FUNC_AC_CURRENT
dmm.FUNC_CAPACITANCE
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_TEMPERATURE
dmm.FUNC_CONTINUITY
dmm.FUNC_DIGITIZE_VOLTAGE
Details
For temperature measurements, this is only available when the transducer is set to a thermocouple or
one of the RTDs.
Long lengths of thermocouple wire can have a large amount of capacitance, which is seen at the
input of the DMM. If an intermittent open occurs in the thermocouple circuit, the capacitance can
cause an erroneous on-scale reading. The open thermocouple detection circuit, when enabled,
applies a 100
µ
A pulse of current to the thermocouple before the start of each temperature
measurement.
Example
dmm.measure.func = dmm.FUNC_TEMPERATURE
dmm.measure.transducer = dmm.TRANS_THERMOCOUPLE
dmm.measure.opendetector = dmm.OFF
Set the measure function to temperature.
Set the transducer type to thermocouple.
Set open lead detection off.
Also see
(on page 2-106)