Operators Manual Model PT2000/H Series Gas Monitor Rev 2. January 2014
6.0 Historical Data Logging
PT2000H saves all the historical data into its non-volatile flash memory. The historical
data is organized in 2 types of log files, Event Log and Interval Data Log.
Furthermore, each log is archived on monthly basis. This is to avoid huge data files and
also allows the user an ease to view the historical data log one month at a time on an
Excel Worksheet.
Filenames used for:
Event log files: ELOG0713.CSV ( Excel readable format)
Interval Data Log: DLOG0713.CSV ( Excel Readable Format)
E(vent) Log and D(ata) Logs. Whereas 0713 means
July (7
th
month) Year 13 (2013).
New log files will be created by the control panel upon beginning of the new month.
Up to 4 Gigabytes for flash memory is available, sufficient for more than 10 years of
data. After downloading the data to an external flash stick user has an option to delete
all the data files from the controller s flash memory.
6.1 Interval Data Log
At the end of every 15 minutes interval the controller saves a record with a date and
time stamp for all the sensor readings. Each record contains Maximum and average
gas reading of each channel. Maximum is the peak reading detected by the sensor
while Average is the time weighted average of the gas reading in that 15 minute
interval.
The data records are saved in flash memory. All the data records are archived on
monthly basis. That is a separate log file is created for each month of the year as
explained in section 6.0
Important Note
At the end of log interval if all the sensor readings are zeros, then the record will not
be saved in the Data Log File. However, during the interval if any of the sensors
detected gas then the record will be saved. Data Records with zeros are discarded to
avoid logging data that really do not provide any information and also to eliminate
huge data files.
See section 6.3 and 6.4 for Downloading data logs and sample data log in Excel.
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