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Calibration Procedures Teledyne API – Model T300/T300M CO Analyzer
214
The following example sets sequence #2 to do a zero-span calibration every other day
starting at 2:15 PM on September 4, 2008, lasting 15 minutes, without calibration. This
will start ½ hour later each iteration.
Table 9-4: Example AutoCal Sequence
MODE AND
ATTRIBUTE
VALUE COMMENT
SEQUENCE
2
Define Sequence #2
MODE
ZERO-SPAN
Select Zero and
Span Mode
TIMER ENABLE
ON
Enable the timer
STARTING DATE
Sept. 4, 2008
Start after
Sept 4, 2008
STARTING TIME
14:15
First Span starts at
2:15 PM
DELTA DAYS
2
Do Sequence #2
every other day
DELTA TIME
00:30
Do Sequence #2 ½
hr later each day
DURATION
30.0
Operate Span valve
for 15 min
CALIBRATE
ON
Calibrate at end of
Sequence
IMPORTANT
IMPACT ON READINGS OR DATA
The programmed STARTING_TIME must be a minimum of 5 minutes later
than the real time clock for setting real time clock (See Section 5.6.4).
Avoid setting two or more sequences at the same time of the day. Any
new sequence that is initiated whether from a timer, the COM ports or the
contact closure inputs will override any sequence that is in progress.
IMPORTANT
IMPACT ON READINGS OR DATA
With CALIBRATE turned ON, the state of the internal setup variables
DYN_SPAN and DYN_ZERO is set to ON and the instrument will reset the
slope and offset values for the CO response each time the AutoCal
program runs.
This continuous readjustment of calibration parameters can often mask
subtle fault conditions in the analyzer. It is recommended that, if
CALIBRATE is enabled, the analyzer’s test functions, slope and offset
values be checked frequently to assure high quality and accurate data
from the instrument.
06864B DCN6314