Campbell Scientific CR23X Micrologger - Manual (Page 27)

CR23X MICROLOGGER OVERVIEW
OV-17
The CR23X 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.
Display Will Show:
Key (ID:Data) Explanation
∗ 7 Mode 07 Enter ∗ 7 Mode.
The Loc 13 Data
Storage Pointer
(DSP) is at Location
13 (in this example).
A Array ID Advance to the first
01: value, the Output
+0102 Array ID. 102
indicates the Output
Flag was set by the
second instruction in
Program Table 1.
A 02: Advance to the first
+21.231 stored temperature.
A Array ID Advance to the next
01: output array. Same
+0102 Output Array ID.
A 02: Advance to 2nd
+21.42 stored 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.
If a terminal is used to communicate with the
CR23X, 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
EDLOG Listing Program 2:
*Table 1 Program
01: 60.0 Execution Interval
(seconds)
1: Panel Temperature (P17)
1: 1 Loc [ CR23XTemp ]
2: Thermocouple Temp (DIFF) (P14)
1: 1 Reps
2: 21 ± 10 mV 60 Hz Rejection
3: 5 DIFF Channel
4: 1 Type T (Copper-Constantan)
5: 1 Ref Temp Loc [ CR23XTemp ]
6: 2 Loc [ TCTemp ]
7: 1.0 Mult
8: 0.0 Offset
3: If time is (P92)
1:
0 Minutes (Seconds --) into a
2: 60 Interval (same units as above)
3: 10 Set Output Flag High
4: Real Time (P77)
1: 110
Day,Hour/Minute
5: Average (P71)
1:
2 Reps
2: 1 Loc [ CR23XTemp ]
6: If time is (P92)
1:
0 Minutes (Seconds --) into a
2: 1440 Interval (same units as above)
3: 10 Set Output Flag High
7: Real Time (P77)
1: 110
Day,Hour/Minute
8: Maximum (P73)
1:
1 Reps
2: 10 Value with Hr-Min
3: 2 Loc [ TCTemp ]
9: Minimum (P74)
1:
1 Reps
2: 10 Value with Hr-Min
3: 2 Loc [ TCTemp ]
10: Serial Out (P96)
1: 71
SM192/SM716/CSM1
This second example is more representative of
a real data collection application. Once again,
the panel temperature is measured, but it is
used as a reference temperature for the
differential voltage measurement of a type T
(copper-constantan) thermocouple; the CR23X
is initially supplied 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.
A thermocouple produces a voltage that is
proportional to the difference in temperature
between the measurement and the reference
junctions.