Specifications

Section 7. Measurement Instructions
Parameter
& Data Type
Enter
SettlingTime
Constant
The time in microseconds to delay between setting up a measurement (switching to the
channel, setting the excitation) and making the measurement. (1 microsecond resolution)
Entry
Voltage Range Integration Settling Time
0
All 250 µS 450 µS (default)
0
All _50Hz, _60 Hz 3 mS (default)
>=100
All All µS entered
Integ The time spent on integration in microseconds for each of the channels measured.
Constant Entry
Integration
250
250 µS
_60Hz or 16667
16,667 µS (reject 60 Hz noise)
_50 Hz or 20000
20,000 µS (reject 50 Hz noise)
Mult, Offset
Constant,
Variable,
Array, or
Expression
A multiplier and offset by which to scale the raw results of the measurement.
7.5 Excitation
ExciteCAO ( CAOChannel, ExmV, FastUpdate )
The CR3000 has two continuous analog out (CAO) channels. These channels
are used to provide a continuous 5 volt supply to external peripherals. The
CAO channels can source 15 mA for continuous voltage and sink 15 mA. The
analog output degrades approximately 25 µV every second. This requires the
instruction to be periodically repeated to maintain a given output.
Parameter
& Data Type
Enter
CAOChannel
Enter the CAO channel that should be set high
Constant
Alpha
Code
Code/
Channel
Result
1 CAO1 Set CAO channel 1 high
2 CAO2 Set CAO channel 2 high
ExmV
Constant
The excitation voltage, in millivolts, to apply to the CAO Channel. The allowable range
is ± 5000 mV.
FastUpdate
Constant
Variable or
Expression
Used to set the amount of time measurement is delayed after the CAO port is set high.
When this parameter is set to True, measurement will be delayed approximately 300
msec. If the parameter is set to False, the measurement will be delayed 2.6 msec.
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