Dräger REGARD 3000 Mode D'emploi page 182

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Glossary
Measured value update time
at the input:
Modbus RTU Gateway Mod-
ule
Setting times
t
20
t
50
t
90
The setting times are independent of the measured gas.
Time until ready for measure-
ment
After switching on the
REGARD 3000
15 Glossary
Term
Alarm hysteresis
Alarm direction
Docking Station
Input element
Energize Mode
Energized on Alarm
Gas detection instru-
ment
Gateway Module
Inhibit
182
max. 6 s
< 3 s
< 3 s
< 3 s
< 60 s
Description
Alarm hysteresis is the zone between the lower value
and the upper value of the alarm target value and the
normal operation range. The zone is calculated by add-
ing the hysteresis value to the target value of the alarm
indicating values below the alarm limit or subtraction
from the target value of the alarm indicating values
above the alarm limit.
In a rising alarm direction an alarm is triggered if the gas
concentration rises and exceeds the alarm threshold.
In a falling alarm direction an alarm is triggered if the gas
concentration falls and falls below the alarm threshold.
Base station for installation of input, output and other
modules types for formation of a REGARD 3000 control-
ler. The Docking Station supplies power to all installed
modules and enables communication among the mod-
ules.
Switches, buttons, fire alarms, etc.
Mode of operation of a relay. There is a distinction
between normally energized and energized on alarm.
Mode of operation of a relay in which the coil is ener-
gized in the activation state.
Instrument that is designed for measurement of a gas
concentration alone or in combination with other devices.
It may also have a warning function.
Module for transfer of REGARD 3000 data to a higher-
level DCS or SCADA system
Locked
A channel in the Inhibit state is locked. The associated
relay switching function is suppressed.
Instructions for use
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REGARD 3000