Thermo Scientific MIRAN 205B Series, Инструкция по эксплуатации

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Chapter 7 Configuration and Setup
7-10
Note:
Too small an interval is chosen if in a multi-gas analysis mode or compensations
enabled (for example, 10 seconds) the analyzer displays an error message. This is
because the analyzer only provides one new set of concentration readings at the end of
the cycle which, depending on the number of wavelengths in the application and the
sampling duration, could be anywhere from approximately 30 seconds to a maximum of
approximately 120 seconds.
Log Start
Log Start chooses the trigger mechanism to begin logging data. Use the Manual start, the
Auto start to have logging start automatically upon entering Analysis, or set the start time
and the duration for a Timed start. To access this parameter, press
3
(Log start) from the
Log Menu. Then press
1
to specify a Manual start,
2
to specify an Auto start. or
3
to
specify a Timed log start. If a Timed log start is selected, the next display prompts
entering the time to start logging. Enter the time in a HH:MM format. Specify the hours
from 00 to 23 (24 hour clock) and the minutes from 00 to 59. Upon a valid entry, the
next display prompts entering a timed log duration. It can be entered as 1 to 999 seconds
or minutes. The numeric field entry is keyed in; the units are selected with the down
arrow key. The display responds "-ACCEPTED-."
Log Store
Log Store selects the data to store for the log. To access this parameter, press
4
(Log
store) from the Log Menu. Then press
1
to specify maximum value,
2
for minimum,
3
for
average,
4
for absorbance,
5
for STEL,
6
for temperature, and
7
for on alarm only.
Note:
Option 7 only stores data when an alarm is activated.
When finished, press
ENTER
to set these selections. The display indicates that the entries
are ACCEPTED.
When in the single sample mode or in the continuous sample mode for a single gas
analysis, the interval can be set, for example, at 10 seconds. The analyzer measures data
at a rate of two points per second. Thus, in the 10 second period of this example, there
will be 20 data points from which to choose. It may be useful to store the Mx, Min, and
Avg of those 20 values. At the end of the interval, the analyzer discards all other data
points. Memory space is impacted only by those entries that are stored.
Note
: If data is stored for absorbance, STEL or temperature modifications to the
standard report definition are required (refer to Chapter 14, “
Custom Report Formatting
”)
to retrieve the data.