Super Systems AC20 - Manual (Page 105)

B. 1
ALGORITHMS ALGORITHMS ALGORITHMS ALGORITHMS ALGORITHMS
The following tempirical (derived from experiment) equations are
included into the instrument firmware and are applied when the
probe sensor voltage is within 1000 and 1300 mV range.
For oxygen potential:
O2(%)
O2(%) O2(%) O2(%) O2(%) =
exp ((2.3 * E) /( 0.0496 * Tk)) exp ((2.3 * E) /( 0.0496 * Tk)) exp ((2.3 * E) /( 0.0496 * Tk)) exp ((2.3 * E) /( 0.0496 * Tk)) exp ((2.3 * E) /( 0.0496 * Tk))
For carbon potential:
For dew point:
Where:
E is the sensor input in mV;
T
R
is the absolute value in degrees Rankine (°F+ 459.67);
CO is the carbon monoxide partial pressure, measured on
Carbon monoxide input;
COF is the Carbon monoxide factor setting (see [RA02]
parameter);
P
H2
is the partial pressure of hydrogen in atmosphere and it is
equal to H2F/1000;
Tk is the temperature in degree Kelvin
NOTE: NOTE: NOTE: NOTE: NOTE: H2F is the [RA03] parameter.
%C
3.792 e
z
6486000
CO COF
e
z
=
•
•
+
Z
E 820.7
0.0239 T
R
=
−
•
D. P. in F
4238.7
9.55731 log P
E 1267.8
0.05512 T
460
10 H2
R
° =
− +
−
•
−
( )
2 0 . 9 2 0 . 9 2 0 . 9 2 0 . 9 2 0 . 9
CALIBRATION PROCEDURE CALIBRATION PROCEDURE CALIBRATION PROCEDURE CALIBRATION PROCEDURE CALIBRATION PROCEDURE
The calibration procedure is enabled by internal dip switch.
V101.2 = Off and V101.4 = On. Perform calibration procedure in
accordance with jumpers position, otherwise the stored
calibration value may be altered.
All calibration parameters are logically divided in groups of two
(initial and final scale), followed by a calibration check in which
the input is measured and displayed in counts (30000 at fsv for all
inputs).
The upper display shows the calibration step (Table A); the lower
display shows the action step (Table B); the middle display shows
the selection On/Off, or value for Out6/Out7. Use FUNC key to
scroll up calibration steps, MAN key to scroll down. Use /
keys to select on/off.
ac20-ssi-B.pmd 16/12/2003, 14.34 1