Campbell Scientific 110PV Surface Temperature Probe - Manual (Page 23)

110PV Surface Temperature Probe
;Every ten minutes set output flag high to write data final storage
7: If time is (P92)
1: 0000
Minutes (Seconds --) into a
2: 10 Interval (same units as above)
3: 10 Set Output Flag High (Flag 0)
;Time stamp data record
8: Real Time (P77)^20972
1: 110
Day,Hour/Minute (midnight = 0000)
;Write 110PV-L 10 minute average to final storage
9: Average (P71)^4293
1: 1
Reps
2: 6 Loc [ Temp_C ]
*Table 2 Program
02: 0.0000 Execution
Interval (seconds)
*Table 3 Subroutines
End Program
5.3 Electrical Noisy Environments
AC power lines, pumps, and motors, can be the source of electrical noise. If
the 110PV probe or datalogger is located in an electrically noisy environment,
the 110PV probe should be measured with the 60 or 50 Hz rejection option as
shown in the examples in Section 5.1.1.2 and Section 5.2.1.
5.4 Long Lead Lengths
It is recommended that the cable resistance of the 110PV-L be corrected for
noting it can contribute significant error (see Figure 2-6). The cable resistance
of each 110PV-L probe in ohms is printed on a heat shrink label found on the
sensor cable. When measuring the 110PV-L in three wire configurations the
cable resistance can be subtracted from the measured resistance value as shown
in the CR10X, CR200(X) and CR1000 Half Bridge program examples above.
Alternatively the 110PV-L is equipped with cable sense leads which can be
used to correct for cable resistance as seen in the CR1000 4-Wire Half Bridge
program example.
Additional settling time may be required for lead lengths longer than 300 feet,
where settling time is the delay before the measurement is made.
For the CR200(X)-series, CR800, CR850, CR1000, and CR3000, the 60 and
50 Hz integration options include a 3 ms settling time; longer settling times can
be entered into the Settling Time parameter.
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