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Teledyne ML - T100 UV Fluorescence SO2 Analyzer
6.8. AUTOMATIC CALIBRATION (AUTOCAL)
Note
If at any time an inapplicable entry is selected (Example: Delta Days > 367) the
ENTR button will disappear from the display.
If contact closures are used in conjunction with the analyzer's AutoCal (refer to Section
6.8) feature and the AutoCal attribute CALIBRATE is enabled, the T100 will not re-
calibrate the analyzer until the contact is opened. At this point, the new calibration
values will be recorded before the instrument returns to SAMPLE mode.
If the AutoCal attribute CALIBRATE is disabled, the instrument will return to
SAMPLE mode, leaving the instrument's internal calibration variables unchanged.
The AutoCal system allows unattended, periodic operation of the zero/span valve
options by using the analyzer's internal time of day clock. AutoCal operates by
executing user-defined sequences to initiate the various calibration modes of the
analyzer and to open and close valves appropriately. It is possible to program and run up
to three separate sequences (SEQ1, SEQ2 and SEQ3). Each sequence can operate in
one of three modes or be disabled.
MODE
DISABLED
Disables the sequence
ZERO
Causes the sequence to perform a zero calibration or check
ZERO-SPAN
Causes the sequence to perform a zero and span concentration
calibration or check
SPAN
Causes the sequence to perform a span concentration calibration or
check
Each mode has seven setup parameters (Table 6-3) that control operational details of the
sequence.
Table 6-3: AutoCal Attribute Setup Parameters
PARAMETER
Timer Enabled
Turns on the Sequence timer
Starting Date
Sequence will operate on Starting Date
Starting Time
Sequence will operate at Starting Time
Delta Days
Number of days to skip between each sequence
Delta Time
Incremental delay on each Delta Day that the sequence starts.
Duration
Duration of the sequence in minutes
Enable to do dynamic zero/span calibration, disable to do a cal check
Calibrate
only. This must be set to OFF for units used in US EPA applications
and with IZS option installed.
1
The programmed STARTING_TIME must be a minimum of 5 minutes later than the real
time clock (refer to Section 6.6 for setting real time clock).
2 Avoid setting two or more sequences at the same time of the day. Any new sequence
which is initiated whether from a timer, the COMM ports, or the contact closure inputs will
override any sequence which is in progress.
Table 6-2: AutoCal Modes
ACTION
ACTION
Calibration Procedures
1, 2
185
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