Impact / Impact Pro / Impact Pro IR Operating Instructions
71
10� Glossary
BASEEFA British Approvals Service for Electrical Equipment
in Flammable Atmospheres – UK Safety
Certification
Bump Test Check of basic functionality by exposure to
test gas, resulting in a gas indication or alarm
condition.
Catalytic Sensor For detection of combustible gases. These are
made of an electrically heated platinum wire coil,
covered first with a ceramic base such as alumina
and then with a final outer coating of palladium
or rhidium catalyst dispersed in a substrate of
thorium.
CE Indicates compliance to all relevant European
directives
Cell An individual sensor
CENELEC Comite Euro peen de Nor mali s ation
Electrotechnique – European Safety
Certification
COSHH Control of Substances Hazardous to Health
CSA Canadian Standards Association
dBA Decibels, relative to the A weighting scale (as
perceived by the human ear).
Electrochemical Sensor A gas sensitive electrode, formed by a permeable
membrane and special electrolyte.
EMC Electromagnetic compatibility.
ESD Electrostatic discharge.
Gas Analyser Normally refers to equipment used to measure
extremely small concentrations of gas (low or
sub ppm) or one specific gas in the presence of
several others.
Gas Detector or Monitor Refers to equipment designed to alert the user to
potentially hazardous concentrations of gas in the
monitored atmosphere.
Hard Zero When a hard zero is performed using either the
built-in calibration menu or the PC software then
any adjustments will remain in place when the
instrument is turned off. Performing a hard zero
followed by an Enforcer calibration, instrument
menu span or PC calibration will adjust the
calibration and change the calibration due date.
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