Campbell Manufacturing CR10 User Manual
CR10 OVERVIEW
OV-17
A
02:0000
Enter 1 and advance to
second parameter (Input
Storage location to
sample).
Storage location to
sample).
1
02:1
Input Storage Location 1,
where the temperature is
stored.
stored.
A
04:P00
Enter 1 and advance to
fourth program
instruction.
instruction.
*
00:00
Exit Table 1.
0
LOG 1
Enter *0 Mode, compile
program, log data.
program, log data.
The CR10 is now programmed to measure the
internal temperature every 5 seconds and send
each reading to Final Storage. Values in Final
Storage can be viewed using the *7 Mode.
internal temperature every 5 seconds and send
each reading to Final Storage. Values in Final
Storage can be viewed using the *7 Mode.
Display Will Show:
Key
Key
(ID:Data)
Explanation
*7
07: 13.000
Enter *7 Mode. The
Data Storage Pointer
(DSP) is at Location 13
(in this example).
(DSP) is at Location 13
(in this example).
A
01: 0102
Advance to the first
value, the Output Array
ID. 102 indicates the
Output Flag was set by
the second instruction in
Program Table 1.
ID. 102 indicates the
Output Flag was set by
the second instruction in
Program Table 1.
A
02: 21.23
Advance to the first
stored temperature.
A
01: 0102
Advance to the next
output array. Same
Output Array ID.
Output Array ID.
A
02: 21.42
Advance to 2nd stored
temp, 21.42 deg. C.
temp, 21.42 deg. C.
There are no date and time tags on the data.
They must be put there with Output Instruction
77. Instruction 77 is used in the next example.
They must be put there with Output Instruction
77. Instruction 77 is used in the next example.
If a terminal is used to communicate with the
CR10, Telecommunications Commands
(Section 5) can be used to view entire Output
Arrays (in this case the ID and temperature) at
the same time.
CR10, Telecommunications Commands
(Section 5) can be used to view entire Output
Arrays (in this case the ID and temperature) at
the same time.
OV5.2 SAMPLE PROGRAM 2
This second example is more representative of
a real-life data collection situation. Once again
the internal temperature is measured, but it is
used as a reference temperature for the
differential voltage measurement of a type T
(copper-constantan) thermocouple; the CR10
should have arrived with a short type T
thermocouple connected to differential channel
5.
a real-life data collection situation. Once again
the internal temperature is measured, but it is
used as a reference temperature for the
differential voltage measurement of a type T
(copper-constantan) thermocouple; the CR10
should have arrived with a short type T
thermocouple connected to differential channel
5.
When using a type T thermocouple, the copper
lead (blue) is connected to the high input of the
differential channel, and the constantan lead
(red) is connected to the low input.
lead (blue) is connected to the high input of the
differential channel, and the constantan lead
(red) is connected to the low input.
A thermocouple produces a voltage that is
proportional to the difference in temperature
between the measurement and the reference
junctions.
proportional to the difference in temperature
between the measurement and the reference
junctions.
To make a thermocouple (TC) temperature
measurement, the temperature of the reference
junction (in this example, the approximate panel
temperature) must be measured. The CR10
takes the reference temperature, converts it to
the equivalent TC voltage relative to 0
measurement, the temperature of the reference
junction (in this example, the approximate panel
temperature) must be measured. The CR10
takes the reference temperature, converts it to
the equivalent TC voltage relative to 0
o
C, adds
the measured TC voltage, and converts the
sum to temperature through a polynomial fit to
the TC output curve (Section 13.4).
sum to temperature through a polynomial fit to
the TC output curve (Section 13.4).
The internal temperature of the CR10 is not a
suitable reference temperature for precision
thermocouple measurements. It is used here
for the purpose of training only. To make
thermocouple measurements with the CR10,
purchase the Campbell Scientific
Thermocouple Reference, Model CR10TCR
(Section 13.4) and make the reference
temperature measurement with Instruction 11.
suitable reference temperature for precision
thermocouple measurements. It is used here
for the purpose of training only. To make
thermocouple measurements with the CR10,
purchase the Campbell Scientific
Thermocouple Reference, Model CR10TCR
(Section 13.4) and make the reference
temperature measurement with Instruction 11.
Instruction 14 directs the CR10 to make a
differential TC temperature measurement. The
first parameter in Instruction 14 is the number
of times to repeat the measurement. Enter 1,
because in this example there is only one
thermocouple. If there were more than 1 TC,
they could be wired to sequential channels, and
the number of thermocouples entered for
repetitions. The CR10 would automatically
advance through the channels sequentially and
measure all of the thermocouples.
differential TC temperature measurement. The
first parameter in Instruction 14 is the number
of times to repeat the measurement. Enter 1,
because in this example there is only one
thermocouple. If there were more than 1 TC,
they could be wired to sequential channels, and
the number of thermocouples entered for
repetitions. The CR10 would automatically
advance through the channels sequentially and
measure all of the thermocouples.