Campbell Scientific 255-100 Novalynx Analog Output Evaporation Gauge - Manual (Page 11)

255-100 Novalynx Analog Output Evaporation Gauge
02: Beginning of Loop (P87)
1: 0
Delay
2: 5 Loop Count
03: Excite-Delay, SE (P4)
1: 1
Reps
2: 5 ±2500 mV Slow Range
3: 1 SE Channel
4: 1 Excite all reps w/Exchan 1
5: 1 Delay (units 0.01 sec)
6: 2500 mV Excitation
7: 21 -- Loc [ Level_1 ]
**8: 1.0 Mult
**9: 0.0 Offset
;It is important the Location is indexed (--).
04: Excitation with Delay (P22)
1: 1
Ex Channel
2: 0 Delay W/Ex (units = 0.01 sec)
3: 10 Delay After Ex (units = 0.01 sec)
4: 0 mV Excitation
05: End (P95)
06: Spatial Average (P51)
1: 5
Swath
2: 21 First Loc [ Level_1 ]
3: 1 Avg Loc [ AveReps1 ]
07: End (P95)
** Use a multiplier of 1.0 and an offset of 0.0 to calibrate, then substitute the appropriate multiplier
and offset (for more information, see the Steps for Calibrating section).
6. Calibration
All 255-100 gauges need to be field calibrated by the user. Field calibration
will provide the multiplier and offset for use in the datalogger program to
provide data in units of inches or centimeters. The CRBasic FieldCal
instruction may be used to perform the calculations automatically and preserve
the results in the datalogger. Refer to the FieldCal help in CRBasic Editor for
more information on its use. The following provides instructions on
performing a manual field calibration.
Steps for Calibrating
(1) Fill the evaporation pan to a depth, measure with a ruler. Depth of water
in the evaporation gauge may be different than in the pan, but will be at
the same level (elevation).
(2) Measure the voltage using the gauge and datalogger Instruction 4,
ExDelSE or BrHalf with a multiplier of 1.0 and an offset of 0.0.
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