None - Hach ORBISPHERE G1100 User Manual

Inputs/Outputs Menu
These points should be set keeping in balance the following conditions
The smaller is Range 2, the better is the analog signal resolution within the expected range
•
of measure.
Size of Range 1 and 3 should be set to deliver an adequate level of resolution for the
•
measures falling out of the expected range of measure.
In Range 0 the analog outputs only shows that measurement is below the MLL value.
•
Similarly in Range 4 the analog output only shows that measurement is over the MHH value.
The formula to compute the measurement knowing the current or the voltage and the resolution
R is given in the following table:
Tri-linear
4-20 mA
0-20 mA
0-5 V

8.5.3 None

This is the default value.
Setting the analog output to "None" means that the output value will always be zero and
importantly ensures that no current is emitted, so reducing power consumption as well as
reducing heat within the instrument.
72
Range
1: AOL > I > 4 M=MLL+(ML-MLL)
2: AOH > I > AOL M=ML+(MH-ML)
3: 20 > I > AOH M=MH+(MHH-MH)
1: AOL > I > 0
2: AOH > I > AOL M=ML+(MH-ML)
3: 20 > I > AOH M=MH+(MHH-MH)
1: AOL > U > 0
2: AOH > U > AOL M=ML+(MH-ML)
3: 5 > U > AOH M=MH+(MHH-MH)
Measurement M
(I-4)/(AOL-4)
*
(I-AOL)/ (AOH-AOL)
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(I-AOH) / (20-AOH) R=(MHH-MH)
*
M=MLL+(ML-MLL) I/AOL
*
(I-AOL)/ (AOH-AOL)
*
(I-AOH)/(20-AOH)
*
M=MLL+(ML-MLL) U/AOL
*
(U-AOL)/ (AOH-AOL)
*
(U-AOH) / (5-AOH)
*
(Figure 38 on page
Resolution R
R=(ML-MLL) 20/((AOL-4)
*
R=(MH-ML) 20/((AOH-AOL)
*
20/((20-AOH)
*
R=(ML-MLL) 20/(AOL 1010)
* *
R=(MH-ML) 20/((AOH-AOL)
*
R=(MHH-MH) 20/((20-AOH)
*
R=(ML-MLL) 5/(AOL 1010)
* *
R=(MH-ML) 5/((AOH-AOL)
*
R=(MHH-MH) 5/((5-AOH)
*
71):
1010)
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1010)
*
1010)
*
1010)
*
1010)
*
1010)
*
1010)
*