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7-1
September 2003
TM0048
LaserNET
Program User's Guide
CHAPTER 7
STORING HISTORICAL DATA
The HART XL system has three ways of storing historical data in the Detector: in the Smoke History, Event
History and through Max/Min Levels. Data may also be stored in the System Log on a PC. This information
is valuable to the installer in setting system parameters. It is also valuable to the owner for post-incident
analysis.
7-1
SMOKE HISTORY
Smoke history is the most important historical data stored by the HART XL. Up to 40,320 time-stamped
samples are stored in the Detector. The sample rate is programmable from one sample every two seconds
to one sample every 60 seconds. The highest value that is recorded during the sample period is the one
which is stored. Up to 28 days of smoke history will be stored in the history buffer (depending on the
sampling rate). Once the history buffer is full, the oldest data is written over as new samples are stored. If
signal averaging or referencing is enabled, the stored smoke levels reflect the adjusted values.
Most history commands will be entered in the history window, shown in the following figure. Direct Detector
Mode displays in parentheses in the title bar for a direct connection to a Detector, while owner location
displays for an IIM connection. For off-line operation, the parentheses are empty. Descriptions of the icons
in this window are detailed later in this chapter.
Figure 7-1. Smoke History Window
7-1.1
Opening the History Window
Both this procedure and off-line operations will vary slightly depending on whether the system is configured
for a Detector or an IIM.
1.
Direct Detector Connection
. Either select
History
from the main screen, then select
Options>Download
from the Smoke History screen or select
Options>Smoke History>Download
from the main screen. The Smoke History window opens, as shown in Figure 7-1.
2.
IIM Connection
. There are three alternatives:
a. If there is only one Detector on the IIM, follow the procedure for a Direct Detector Connection.
Содержание HART XL
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