Campbell CR23X, Operator'S Manual

Page: 122 / 374

SECTION 8. PROCESSING AND PROGRAM CONTROL EXAMPLES
8-12
Table 8.10-3 lists the input channel
configuration and Input Storage allocation for
the measured values. After reading the new
input samples, the Level 2 measurements are
relocated using the Block Move Instruction 54,
then Ta1 is relocated through a separate move
and e1 is positioned by specifying the
destination location in the Wet/Dry-Bulb
Instruction. The COV/CORR Instruction must
be entered twice, once for each level.
In addition to ordering Level 1 and Level 2 in
locations 1-5 and 11-15 respectively, 2 more
locations are required. Converting the wet-/dry-
bulb measurements to vapor pressure using
Instruction 57 requires atmospheric pressure.
We'll use the standard atmosphere for the site
elevation and key the value into Location 17
using the C command in the
6 Mode.
This example requires that 54 locations be
allotted to Input Storage and 79 to Intermediate
Storage (35 for the 1st COV/CORR Instruction,
43 for the second, and 1 for Instruction 92).
TABLE 8.10-3. Example Input Channel and Location Assignments
INPUT INPUT INPUT INPUT
PARAM CHAN LOC PARAM LOC PARA LOC
W1 1 1 W1 1 W1 1
U1 2 2 U1 2 U1 2
V1 3 3 V1 3 V1 3
W2 4 4 Ta1 9 ---------------------- Ta1 4
U2 5 5 Tw1 10 Separate moves e1 5
V2 6 6 W2 11 W2 11
Ta2 7 7 ->Block-> U2 12 U2 12
Tw2 8 8 move V2 13 V2 13
Ta1 9 9 Ta2 14 Ta2 14
Tw1 10 10 Tw2 15 e2 15
PROGRAM
* Table 1 Program
01: 1 Execution Interval (seconds)
01: Set Port(s) (P20)
1:
9999 C8..C5 = nc/nc/nc/nc
2: 9933 C4..C1 = nc/nc/1ms/1ms
02: Volts (SE) (P1)
1:
6 Reps
2: 5 ±5000 mV Slow Range
3: 1 SE Channel
4: 1 Loc [ W1 ]
5: .018 Mult
6: 0 Offset