RKI Instruments SDM-2009 PC Controlled Configuration - Manual (Page 76)

71 • Logs Window
and have data for the same year/month, they will be distinguished by their
different Station ID or User ID. When viewing data by Station ID or by User ID,
if two instruments have the same Station ID and/or User ID and have data for
the same year/month, they will be distinguished by their different serial
numbers.
NOTE: In the examples that follow, the data will be shown organized by serial
number. If you do not select any of the organization boxes or select the
Station ID or User ID boxes instead of or in addition to the Serial No.
box, your Logs Window will look slightly different.
Alarm Trend Data
The instrument saves files that describe the most recent gas alarm events. If a gas
alarm event occurs, then an alarm trend file that is centered around the event is
saved. It shows the readings up to 30 minutes before and 30 minutes after the event,
with the log interval time every 5 seconds. The readings that are saved are the peak
(minimum for oxygen) readings for the previous 5 seconds. If the instrument has not
been on for 30 minutes before the alarm event occurs, the data during this time is left
blank. If the instrument is turned off less than 30 minutes after an alarm event occurs,
the data file will only have logged data until the unit was turned off.
The instrument saves up to 8 alarm trend files. When an alarm event triggers an
alarm trend file to be saved, subsequent alarm events must occur 15 minutes after
the previous triggering event in order to trigger the saving of another alarm trend file.
If 8 alarm trend files are already saved in the instrument’s memory, the oldest alarm
trend file is overwritten when a new alarm trend file is saved.
Alarm trend data is downloaded from an instrument when a complete download is
performed. To view and perform desired operations with the alarm trend files:
1. While in the Logs window, find your instrument by serial number, then click the
expanded view symbol (+) of or double-click the serial number folder to view
the contents.
2. Click the expanded view symbol (+) of or double-click the Alarm folder to view
the contents. Alarm trend data folders are arranged by year/month.