Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 210)

Calibration Procedures Teledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 210
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 1/2 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
I
MPORTANT I MPACT ON R EADINGS OR D ATA
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.
I
MPORTANT I MPACT ON R EADINGS OR D ATA
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.