Specifications

Section 7. Measurement Instructions
SlowAntenna
See CS110 manual.
Therm107 (Dest, Reps, SEChan, ExChan, SettlingTime, Integ, Mult, Offset)
Therm108 (Dest, Reps, SEChan, ExChan, SettlingTime, Integ, Mult, Offset)
Therm109 (Dest, Reps, SEChan, ExChan, SettlingTime, Integ, Mult, Offset)
The Therm107, Therm108, and Therm109 instructions are used to measure the
107, 108, and109 thermistors, respectively.
The syntax for all three instructions is the same.
The instruction makes a half bridge voltage measurement and processes the
results using the Steinhart-Hart calculation. The output is temperature in
degrees C.
Parameter
& Data Type
Enter
Dest
Dest is the variable in which the results of the measurement will be stored. If the Reps
parameter is greater than one, Dest must be an array dimensioned large enough to hold the
results for all repetitions.
Reps
The Reps parameter is the number of times the measurement should be made.
Measurements are made on consecutive channels. If the Reps parameter is greater than 1,
the Dest parameter must be a variable array.
SEChan
The SEChan argument is the number of the single-ended channel on which to make the
first measurement (1-28). If the Reps parameter is greater than 1, the additional
measurements will be made on sequential channels.
ExChan
The ExChan is the excitation channel number (1-4) to use to excite the thermistor. If
multiple thermistors are measured with one instruction, all repetitions will use the same
excitation channel.
Alphanumeric Numeric Description
VX1 1 Excitation channel 1
VX2 2 Excitation channel 2
VX3 3 Excitation channel 3
VX4 4 Excitation channel 4
SettlingTime
The SettlingTime parameter is the amount of time to delay after setting up a measurement
and before making the measurement. Refer to the table below for default SettlingTimes.
Entry Range Integration Settling Time
0 All 250 ms 450 ms (default)
0 All _50Hz 3 ms (default)
0 All _60Hz 3 ms (default)
>100 All All ms entered
Integ
The Integ parameter is the amount of time, in microseconds, to integrate a signal for the
channel being measured.
Option Description
250 Performs a 250 microsecond integration.
_60Hz Performs a 16.667 millisecond integration; filters 60 Hz noise.
_50Hz Performs a 20 millisecond integration; filters 50 Hz noise.
Mult, Offset
The Mult and Offset parameters are each a constant, variable, array, or expression by
which to scale the results of the measurement. With a multiplier (mult) of 1 and an offset
of 0, the output is temperature in degrees C. With a multiplier of 1.8 and an offset of 32,
the output is temperature in degrees F.
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