DS2 Docking Station
Appendix B
Version 9.1 (P/N: 17112798)
INDUSTRIAL SCIENTIFIC
269
Item Definition
Instrument Docking
Station
The physical hardware into which an instrument is placed for
calibration, bump tests, diagnostic tests, and datalog downloads to the
Docking Station Server.
LEL (Lower
Explosive Limit)
The minimum concentration at which a gas will explode, displayed as
a percentage (%LEL). The term “LEL” is also used to describe a type
of sensor that detects combustible gases.
Navigation pane
The left frame of the DSSAC application that contains a tree-like
structure used to navigate to different items in the Docking Station
Network.
Network
Administrator
Typically the person or persons assigned to configure an
organization’s network and troubleshoot connectivity issues.
communications protocols used to connect hosts on the Internet.
PID (Photo Ionization
Detector)
An instrument that utilizes ultra-violet light energy to ionize and
detect the presence of an unknown gas or vapor.
PPM (Parts per
Million)
A unit of measurement used for small proportions of concentrations.
In gas analysis, it expresses the volume of a gas present in terms of its
relationship to a whole of 1 million parts of air. Examples: 1% of
volume = 10,000 ppm; 100% of volume = 1,000,000 ppm.
Settings Read Event
An event in the DS2 Docking Station where the current settings on an
instrument or IDS are read to see if they have changed. This event
runs daily for IDSs, and upon docking for instruments, in conjunction
with the Settings Update Event. This event cannot be configured by
an end-user.
Settings Update
Event
An event in the DS2 Docking Station in which Instrument or IDS
settings that were updated in the DSSAC are uploaded to the docked
instrument or to the IDS. This event runs daily for IDSs, and upon
docking for instruments. This event cannot be configured by an end-
user.
Smart Card
A plastic card, about the size of a credit card, with an embedded
microchip that contains data. DS2 Docking Station uses Smart Cards
for the iGas component.
Span
See “Full Span Reserve”
Span Reserve
See “Full Span Reserve”
STEL (Short Term
Exposure Limit)
The average amount of gas (in PPM) a worker can be exposed to in a
15-minute period with no long term health effects. This may occur 4
times a shift with one hour between 15-minute exposures.
TWA (Time
Weighted Average)
The average amount of gas (in PPM) a worker can be exposed to over
a certain time period. This time is defined as 8 hours to represent a
normal workday.
