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M400E Ozone Analyzer Operator’s Manual 
M400E Calibration Procedures 
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 
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 
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 
 
NOTES 
The programmed STARTING_TIME must be a minimum of 5 minutes later than the real time clock for 
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 
 
04315 Rev. C1 
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