LCD Graph Display

1. The REAL TIME Graph shows data in real time.

• The graph displays about 11 minutes of data. The
• graph is updated approximately every 6 seconds.
• The update is the maximum and minimum
• readings for the time between graphic updates.
• The data in the Real Time Log is overwritten when
• the graphic scrolls.
• The data in the Real Time Log is not retained after power is cycled

2. The WEEK LOG Graph will display 7 to 9 days of data.

• The Week Log is updated every three minutes
• The data is the maximum and minimum value for the three minutes prior to
• saving
• When the WEEK Log contains more than 9 days of data, the two oldest days are
• summarized into the MONTH LOG and then erased from the WEEK LOG
• The date in this graph indicates the oldest data and newest date in the log
• Data is retained during power cycle

3. The MONTH LOG Graph shows 29 to 41 days of data compressed from the WEEK LOG.

• Records in the WEEK LOG are scanned 5 at a time and the maximum and
• minimum for these five records are saved as one record in the MONTH LOG
• The MONTH LOG Graph can display 29 to 41 days of data
• When the MONTH LOG contains more than 41 days of data, the oldest 12 days
• of data are deleted to leave a MONTH LOG size of 29 days
• The date in this graph indicates the oldest data and newest data in the log
• Data is retained during power cycle

Data for the Week, Log and Month Log follows the same guidelines as the 4-20mA loop.

• The 4-20 mA Loop can be set to Hold the last value, go to maximum or go to minimum during a Tape Out or Tape Dark alarm. The default is to go to maximum. The Data Logs will also continue to log data at the correct intervals with the settings for the first loop