Appendix C. Alternate EC100 Outputs
C-3
bytes in the output array should be entered in as the
swath
. The returned value
is the computed signature.
//signature(), signature algorithm.
// Standard signature is initialized with a seed of 0xaaaa.
// Returns signature.
unsigned short signature( unsigned char* buf, int swath,
unsigned short seed ) {
unsigned char msb, lsb;
unsigned char b;
int i;
msb = seed >> 8;
lsb = seed;
for( i = 0; i < swath; i++ ) {
b = (lsb << 1) + msb + *buf++;
if( lsb & 0x80 ) b++;
msb = lsb;
lsb = b;
}
return (unsigned short)((msb << 8) + lsb);
}
C.2 Analog Output
C.2.1 Specifications
Analog
(two outputs for CO
2
and H
2
O densities)
Voltage range:
0 mV to 5000 mV
Resolution:
76 µV (16 bit)
Update rate:
60 Hz
Accuracy (at 25 °C):
± 3 mV
CO
2
density equation:
mg·m
–3
= 0.38632· (mV
out
)
−
102.59
Full scale range:
−
103 to 1829 mg·m
–3
H
2
O density equation:
g·m
–3
= 0.00865· (mV
out
)
−
2.26
Full scale range:
−
2 to 41 g·m
–3
C.2.2 Detailed Information
Although digital outputs are generally preferred, analog outputs are available
on the EC100 for compatibility with simple recording devices that cannot use
the digital outputs. Analog outputs are subject to additional noise and
digitization errors. Digital outputs include additional diagnostic data to assist
with data quality assessment and troubleshooting. If analog output is enabled,
the EC100 will output two analog signals that correspond to CO
2
density and
H
2
O density. These signals range from 0 to +5 V. TABLE
multipliers and offsets for the analog outputs.
Analog output may also be used, however only CO
2
density and H
2
O density
will be output. For analog output, use cable CABLE2TP-L (pn 26986-L), the
length of which is specified by the user when ordering. The connector labeled
Analog Outputs on the EC100 panel indicates where each wire should be
connected (CO
2
voltage signal, H
2
O voltage signal, and two ground
connections).
Summary of Contents for EC150
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Page 67: ...Appendix B Filter Bandwidth and Time Delay B 4 ...
Page 75: ...Appendix D Useful Equations D 4 ...
Page 76: ...E 1 Appendix E Safety Data Sheets SDS E 1 Molecular Sieve Type 13X ...
Page 77: ...Appendix E Safety Data Sheets SDS E 2 ...
Page 78: ...Appendix E Safety Data Sheets SDS E 3 ...
Page 79: ...Appendix E Safety Data Sheets SDS E 4 ...
Page 80: ...Appendix E Safety Data Sheets SDS E 5 E 1 Magnesium Perchlorate ...
Page 81: ...Appendix E Safety Data Sheets SDS E 6 ...
Page 82: ...Appendix E Safety Data Sheets SDS E 7 ...
Page 83: ...Appendix E Safety Data Sheets SDS E 8 ...
Page 84: ...Appendix E Safety Data Sheets SDS E 9 ...
Page 85: ...Appendix E Safety Data Sheets SDS E 10 ...
Page 86: ...Appendix E Safety Data Sheets SDS E 11 ...
Page 87: ...Appendix E Safety Data Sheets SDS E 12 E 2 Decarbite ...
Page 88: ...Appendix E Safety Data Sheets SDS E 13 ...
Page 89: ...Appendix E Safety Data Sheets SDS E 14 ...
Page 90: ...Appendix E Safety Data Sheets SDS E 15 ...
Page 91: ...Appendix E Safety Data Sheets SDS E 16 ...
Page 92: ...F 1 Appendix F Packing Information F 1 EC150 GH Packing Information ...
Page 93: ...Appendix F Packing Information F 2 F 2 EC150 SH Packing Information ...
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