Campbell Scientific CR9000X Measurement and Control System - Manual (Page 232)

Section 7. Measurement Instructions
7-8
Parameter
Enter TCSE PARAMETERS
Dest
Var. or Array
The Variable in which to store the results of the instruction. When Reps are used the results are stored in
an array with the variable name. An array must be dimensioned to have elements for all the Reps.
Reps
Constant
The number of repetitions for the measurement.
*Range The voltage range for the measurement. TCSE raw output is in Celsius.
Constant ± 5 Volt Analog Input Module ± 50 Volt Analog Input Module
Alpha
Code Numeric
Code Voltage
Range Alpha
Code Numeric
Code Voltage
Range
mV5000 0 ± 5000 mV V50 6 ± 50 V
mV1000 1 ± 1000 mV V10 7 ± 10 V
mV200 4 ± 200 mV V2 10 ± 2 V
mV50 5 ± 50 mV mV500 11 ± 500 mV
Aslot
Constant
The number of the slot that holds the Analog Input Module to be used for the measurement.
SEChan
Constant
The single-ended channel number on which to make the first measurement. When Reps are used,
subsequent measurements will be made on sequential single-ended channels. Enter a negative number to
dwell on that channel for the number of measurements specified by the Reps parameter (except for
CR9058E).
TCType The code for the thermocouple type.
Constant Alpha Code Numeric Code Thermocouple Type
TypeT 0 Copper Constantan
TypeE 1 Chromel Constantan
TypeK 2 Chromel Alumel
TypeJ 3 Iron Constantan
TypeB 4 Platinum Rhodium
TypeR 5 Platinum Rhodium
TypeS 6 Platinum Rhodium
TypeN 7 Nicrosil-Nisil (NiCRSi-NiSiMg)
TRef
Variable
The name of the variable that is the reference temperature for the thermocouple measurements.
SettlingTime
Constant
The time in microseconds to delay between setting up a measurement (switching to the channel, setting
the excitation) and making the measurement (10 microsecond resolution)
See Section 3.1.3 Signal Settling Time.
Entry
Voltage Range
Delay CR9055
Voltage Range
Delay
0 ± 50 mV 20 µS (default) ± 0.5V 40 µS (default)
0 ± 200 mV 20 µS (default) ± 2 V 40 µS (default)
0 ± 1000 mV 10 µS (default) ± 10 V 30 µS (default)
0 ± 5000 mV 10 µS (default) ± 50 V 30 µS (default)
> 0 all Truncate to closest 10 µS all Truncate to closest 10 µS
Integ
Constant
The integration time in microseconds for each of the channels measured (10 microseconds resolution).
See Section 3.1.1.3 Integration for more information on Integration.
Mult, Offset
Constant, Var,
Array, or
Expression
A multiplier and offset by which to scale the raw results of the measurement. The raw result of the
TCDiff instruction is in degrees C. A multiplier of 1.8 and an offset of 32 will convert the temperature
to degrees F.
*Range: See notes in TCDiff section.
See Section 3.1.4 Thermocouple Measurements for an in-depth study of TC
measurements and an error analysis for them.
See Section 3.1.2.1 Single Ended Voltage Measurements for in-depth
coverage of the Single Ended Measurement process.