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Model 109SS Temperature Probe
9: Z=X+F (P34)
1: 8 X Loc [ Tk ]
2: -273.15 F
3: 9 Z Loc [ Air_Temp ]
10: If time is (P92)
1: 0 Minutes (Seconds --) into a
2: 10 Interval (same units as above)
3: 10 Set Output Flag High (Flag 0)
11: Real Time (P77)
1: 110 Day,Hour/Minute (midnight = 0000)
12: Average (P71)
1: 1 Reps
2: 9 Loc [ Air_Temp ]
*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 109SS probe or datalogger is located in an electrically noisy environment,
the 109SS 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
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-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. The example Therm109 instruction
listed below has a 20 mSec (20000 μSec) delay:
‘Therm109 ( Dest, Reps, SEChan, ExChan, SettlingTime, Integ, Mult, Offset )
Therm109(T109_C,1,1,1,20000,_60Hz,1.0,0.0)
In Edlog, use the DC Half Bridge instruction (P4) with a 20 millisecond delay
as shown below. Use P4 in place of P5 in Section 5.2.1 (the instructions that
follow P5 to convert the measurement result to temperature are still required).
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