49
Manual programming procedures are covered in
detail below in section 5.4.
BioTrak software has been designed to simplify
programming, downloading, and data analysis. The
software allows optional instrument setups to be created
by "filling out" forms right on the computer screen.
Note: The PhD Lite is designed to download data
from the instrument to a PC using an IrDA compliant
infrared data transceiver. It may be necessary to
purchase an IrDA transceiver if your computer is
not equipped with this feature. Most new laptop-
style PCs are equipped with an IrDA port, but many
desktop and older laptop-style PC’s are not.
Consult your computer’s reference manual for
details.
Once information has been downloaded to the
computer, it may be used for a variety of purposes.
Data may be displayed and reviewed in detail through
the computer monitor screen, or used to generate and
print reports, tables and graphs of time history exposure
data. It is also possible to export records to other
software applications in the form of ASCII text or in a
spreadsheet format. Another option is to simply retain
downloaded records within the BioTrak program for
future use as needed.
Note: The remaining material in this chapter is
designed to acquaint the user with datalogging
features that can be programmed through the PhD
Lite instrument itself. Consult the BioTrak
Reference Manual for complete instructions on the
use of BioTrak software.
5.3.2 IQ
System
Biosystems Instrument Quality (IQ) System offers all of
the data tracking features of BioTrak, but also includes
many features that were not possible when BioTrak was
originally released. The IQ Controller can be used with
IQ Docking Stations to provide hands-free calibration of
up to 10 Biosystems gas detectors. The IQ System is
also e-mail capable and can automatically notify you
when an instrument fails calibration.
Call Biosystems for more information on the IQ
Systems, or visit the IQ System website at
http://www.bioIQsystems.com .
5.4 Datalogger
menu
It is possible to customize the way the PhD Lite records
data in a number of different ways. Options include
extended recording time, tagging the exposure data with
time and date information, or assigning location and ID
information.
PhD Lite instruments equipped with datalogging
capability will have an additional subdirectory in the
Main Menu called DATALOGGER. The Datalogger
Menu provides access to all user-configurable
datalogging options. To enter the Datalogger Menu:
1. Turn the instrument on and wait until the gas
readings screen appears.
2. Press the MODE button until you reach the
Information screen (shown below).
01:15 15:08
3.9V 71F
MENU
3. Hold down the left navigation arrow for 3 seconds
or until EXIT appears and is highlighted.
01:15 15:08
EXIT
3.9V 71F
MENU
4. Press the down navigation arrow once to highlight
MENU and press the MODE button. The Main
Menu will then be displayed and EXIT will be
highlighted.
ALARMS CALIBRATION
OPTIONS SCREEN
VIEW DATALOGGER
TIME
EXIT
5. Use the navigation arrows to highlight
DATALOGGER and press the MODE button.
ALARMS
CALIBRATION
OPTIONS SCREEN
VIEW
DATALOGGER
TIME EXIT
The datalogger menu will then be displayed.
INTERVAL CLEAR_DL
SESSIONS COMMN
ID_INFO
EXIT
5.4.1
Setting the datalogging interval
The datalogger samples continuously, so the data
stream must be broken into intervals to be recorded.
The datalogging interval defines the frequency of the
breaks in the data stream. The interval may be set
anywhere between one second and one hour by using
the navigation arrows as detailed below. The default
datalogging interval is 1 minute.
There is a finite amount of memory storage available in
the PhD Lite. Once the memory is “full”, the PhD Lite
will begin to write the new data over the oldest data. In
this way, the newest data is always conserved.
Different sensor configurations and/or datalogging
intervals may increase or decrease the length of time
before old data is overwritten. A longer sampling
interval will allow the retention of more hours of data
before old data is overwritten making the PhD Lite ideal
for long-term sampling projects.
The datalogger in the PhD Lite can store the exposure
values for approximately 2900 datalogging intervals
when using a four channel configuration of O
2
, LEL, CO,
and H
2
S. This provides for storage of approximately 48
hours of four-gas monitoring when a one-minute
datalogging interval is specified. Using a longer
datalogging interval increases the length of monitoring
time before the oldest data is overwritten by new data.
For instance, if a datalogging interval of two minutes is
selected, a little over 97 hours of monitoring data will be
stored before the oldest data is overwritten.
Summary of Contents for PhD Lite
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