History Submenu; Events History - GE Hydran 201 i Instruction Manual

Chapter 4 • Hydran 201Ti's Displays and Menus
The following Sections describe the parameters and commands of each submenu.
4.5.1

History Submenu

The History submenu allows the user to:
• Consult the four historic data files:
– Events (recording at the time of events; example: alarms)
– Short Term (recording at fixed logging rate; example: every 15 minutes)
– Long Term (recording at fixed logging rates; example: every 6 hours)
– Service (recording at the time of the semimonthly, automatic sensor test)
• Set the logging rate of these files.
• Clear the content of these files.
4.5.1.1

Events History

When an event occurs, the date and time of occurrence, an event message and ten variables
are stored in historic data file Events. Its capacity is 500 recordings; when the file is full and
a new recording occurs, the oldest recording is deleted (first in, first out method). All event
messages and their description are provided in Appendix E.
The following events are recorded:
• An alarm is triggered.
• An alarm is acknowledged by a user.
• An alarm is cancelled (the alarm condition has disappeared).
• A parameter is changed by a user.
• A new Hydran 201 sensor is installed.
• The H201Ti is calibrated.
• A power-up or a power-down occurs.
• The H201Ti is put in service (first power-up).
• The self-test sequence has failed during power-up.
• The microprocessor is reset by the internal watchdog.
Navigation is performed as follows:
• From History;Events, press ENTER to read the date and time of the last event recorded
in the historic data file Events.
• Press UP or DOWN to read the date and time of previous or next events.
4-12 Rev. 6, March 2011 Part 17997