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T400 Calibration Procedures T400 Ozone Analyzer Operator’s Manual
196
For each mode, there are seven parameters that control operational details of the
SEQUENCE. They are:
Table 9-2: AutoCal Attribute Setup Parameters
ATTRIBUTE NAME ACTION
Timer Enabled Turns on the Sequence timer.
Starting Date Sequence will operate after Starting Date.
Starting Time Time of day sequence will run.
Delta Days Number of days to skip between each Seq. execution.
Delta Time Number of hours later each “Delta Days” Seq is to be run.
Duration Number of minutes the sequence operates.
Calibrate
Enable to do a calibration – Disable to do a cal check only MUST be set to NO for
instruments with IZS Options installed and functioning.
The following example sets sequence #2 to do a zero-span calibration every other day
starting at 1 Am on September 4, 2001, lasting 15 minutes, without calibration. This
will start ½ hour later each iteration.
Table 9-3: Example AutoCal Sequence
MODE AND ATTRIBUTE VALUE COMMENT
Sequence
2
Define Sequence #2
Mode
ZERO-HI
Select Zero and Span Mode
Timer Enable
ON
Enable the timer
Starting Date
Sept. 4, 2001
Start after Sept 4, 2001
Starting Time
01:00
First Span starts at 1:00AM
Delta Days
2
Do Sequence #2 every other day
Delta Time
00:30
Do Sequence #2 ½ hr later each day
Duration
15.0
Operate Span valve for 15 min
Calibrate
NO
Do not calibrate at end of Sequence
Note 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).
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.
The CALIBRATE attribute must always be set to NO on analyzers with IZS
Options installed and functioning.
Calibrations should ONLY be performed using external sources of Zero
Air and Span Gas whose accuracy is traceable to EPA or NIST standards.
06870C DCN6332