Campbell Scientific 109 109-L Temperature Probe - Page 19

Model 109 Temperature Probe Edlog 1: AC Half Bridge (P5) 1: 1 Reps 2: 25 2500 mV 60 Hz Rejection Range ;CR23X:5000 mV; 21X,CR7:5000 mV slow 3: 1 SE Channel 4: 1 Excite all reps w/Exchan 1 5: 2500 mV Excitation ;CR23X,21X,CR7: 5000 mV 6: 1 Loc [ V_Vx ] 7: 1.0 Mult 8: 0.0 Offset 8.4 Long Cable Lengths Long cable lengths may require longer than normal analog measurement settling times. Settling times are increased by adding a measurement delay to a datalogger program. CRBasic For CRBasic loggers, the 60 Hz and 50 Hz integration options include a 3 ms settling time; longer settling times also can be entered into the Settling Time parameter. The following example uses a 20000 µs settling time: Therm109(T109_C,1,1,1,20000,_60Hz,1.0,0.0) NOTE Integration and settling time parameters are not available for CR200(X) series dataloggers. Edlog In place of the AC Half Bridge (P5), use the Excite-Delay (SE) (P4) instruction with a 20 ms delay to measure the probe, as shown in the following example: 1: Excite-Delay (SE) (P4) 1: 1 Reps 2: 5 2500 mV Slow Range ;CR23X,21X,CR7: 5000 mV 3: 1 SE Channel 4: 1 Excite all reps w/Exchan 1 5: 2 Delay (0.01 sec units) 6: 2500 mV Excitation ;CR23X,21X,CR7: 5000 mV 7: 3 Loc [V_Vx ] 8: .0004 Multiplier 9: 0.0 Offset 9. Troubleshooting and Maintenance NOTE All factory repairs and recalibrations require a returned material authorization (RMA) and completion of the "Declaration of Hazardous Material and Decontamination" form. Refer to the Assistance page at the beginning of this manual for more information. 13