Campbell Scientific CR5000 Measurement and Control Module - Manual (Page 156)

Section 7. Measurement Instructions
7-30
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 ± 20 mV Flash 200 µS (default)
0 All but ± 20 mV, Flash 100 µS (default)
0 All 250 µS 200 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
0, 200 Flash Conversion; 200 = 2 flash conversions 100 µS apart
and averaged
250; 500-16000 250 µS; multiples of 500: 250 µS integrations starting each
500 µS and averaged
_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. See the
measurement description for the units of the raw result; a multiplier of one and an
offset of 0 are necessary to output in the raw units. For example, the TCDiff
instruction measures a thermocouple and outputs temperature in degrees C. A
multiplier of 1.8 and an offset of 32 will convert the temperature to degrees F.
AO4 (Source, Reps, SDMAdress)
This instruction is used to set the voltage to an SDM-AO4 four channel analog
output device.
The AO4 instruction has the following parameters:
Parameter
& Data Type Enter
Source
The Source parameter is the variable that hold the voltage, in millivolts, that
should be sent to the SDM-AO4. If multiple SDM-AO4s are to be triggered
with one instruction, this parameter must be an array dimensioned to the size
of the Reps.
Reps
The Reps parameter determines the number of SDM-AO4 devices to supply
a voltage using this instruction. The SDM-A04s must have sequential SDM
addresses if the Reps parameter is greater than 1.
SDMAddress The SDMAddress parameter defines the address of the SDM-AO4 to which
a voltage should be applied. Valid SDM addresses are 0 through 14.
Address 15 is reserved for the SDMTrigger instruction.
The SDM address is entered as a base 10 number, unlike older, jumper-
settable SDM instruments that used base 4.