Operation Serinus 51 User manual 1.0
24
GasMeasure Cycle
This field sets the time taken per measurement cycle i.e. 5 mins = 5
minutes for SO
2
, 5 minutes for H
2
S. The longer this time is set to the
more stable readings will be, but the amount of readings per hour will
decrease.
Backgnd Interval
Set time in HOURS (2, 4, 6, 8, 12, 24) or disabled. A microprocessor-
controlled field that indicates when an auto zero cycle will begin. The
results of the background are stored in the Event Log.
Gas to Measure
This field allows the operator to select whether the analyzer will only
measure SO
2
, only measure H
2
S or measure both SO
2
and H
2
S.
Noise
The standard deviation of the concentration. The manner in which this is
calculated is as follows:
1. Take a concentration value once every two minutes
2. Store 25 of these samples in a first in, last out buffer
3. Every two minutes, calculate the standard deviation of the current
25 samples. This is a microprocessor-generated field and cannot
be set by the operator.
Note: This reading is only valid if zero air or a steady
concentration of span gas has been fed to the analyzer
for at least one hour.
3.5.5 Calibration menu
Span Calibrate
This field is used to correct the span calibration setting. This option
should be used only when a known concentration of SO2 span gas is
running through the measurement cell. When this is happening activate
the span calibrate field, a window will open with editable numbers,
change the numbers to the concentration that the instrument is receiving
and select accept. The instrument span calibration has now been set.
Zero calibrate
This field is used to correct the zero calibration setting. This option
should be used only when zero gas is running through the measurement
cell. When this is happening activate the zero calibrate field, a window
will open with editable numbers, leave the numbers at 0000.000 and
select accept. The instrument zero calibration has now been set. Note
zero calibrations are generally not required as a background sequence
should correct for zero drift.
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