User`s manual

Section 4: Configure Inputs, Part II - Calibration Coefficients
44
• IFREMER
This sensor requires two channels - one for the direct voltage and the
other for the measured voltage. Make sure to select both when configuring
the instrument.
For the direct voltage channel, enter vm0, vd0, d0, and k.
diffusion = [k * (vm – vm0) / (vd – vd0)] – d0
where
k = scale factor vm = measured voltage
vm0 = measured voltage offset vd = direct voltage
vd0 = direct voltage offset d0 = diffusion offset
• Seapoint Turbidity
Enter gain setting and scale factor.
output = (volts * 500 * scale factor)/gain
where
Scale factor is from calibration sheet
Gain is dependent on cable used (see cable drawing)
Note: SEASAVE can process data for an instrument interfacing with
up to two Seapoint Turbidity sensors.
• Seatech LS6000
Enter gain setting, slope, and offset.
Output = [volts * (range / 5) * slope] + offset
where
Slope is from calibration sheet.
Range is based on sensor ordered (see calibration sheet) and cable-
dependent gain (see cable drawing to determine if low or high gain):
Range for High Gain Range for Low Gain
2.25 7.5
7.5 25
75 250
225 750
33 100
Note: SEASAVE can process data for an instrument interfacing with up to
two Seatech LS6000 sensors.
• Turner SCUFA
Enter scale factor and offset.
NTU = (scale factor * voltage) + offset
corrected chlorophyll = (mx * chlorophyll) + (my * NTU) + b
where
mx, my, and b = coefficients entered for Turner SCUFA fluorometer
chlorophyll = results from fluorometer channel in SCUFA (see Turner
SCUFA in fluorometer equations above)
Note: SEASAVE can process data for an instrument interfacing with up to
two Turner SCUFA sensors.
Oxidation Reduction Potential (ORP) Calibration
Coefficients
Enter M, B, and offset (mV).
Oxidation reduction potential = [(M * voltage) + B] + offset
Enter M and B from calibration sheet.
Note:
See Application Note 48 for complete
description of calculation of Seapoint
Turbidity calibration coefficients.
Note:
See Application Note 19 for complete
description of calculation of ORP
calibration coefficients.
Notes:
• To enable entry of the mx, my,
and b coefficients for the
SCUFA fluorometer, you must
first select the Turner SCUFA
OBS/Nephelometer.
• See Application Note 63 for
complete description of calculation
of Turner SCUFA calibration
coefficients.