Dräger Regard 3900, Инструкция по эксплуатации, Страница: 80 / 292

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_ REGARD
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_ Maintenance
8.2.5 Settings menu
Using the Settings menu and the channel and relay submenus, the combination of
the internal control modules, as well as the settings for the gas detection and
warning units, can be defined.
When using a control unit from the REGARD® 3900 series to detect combustible
gases, at least one gas alarm relay must be set to latching to protect against
explosion hazards. (See DIN EN 60079-29-1:2007 Potentially explosive
atmospheres - Gas detectors - Requirements for the operating behaviour of devices
for measuring combustible gases.)
8.2.6 Channel menu
In the channel menu, you can view and configure the input module channels (4–
20).
The existing input channels depend on the combination of the internal control
modules. In the case of a control unit with 4 input modules (16 input channels), the
following channel arrangement would result:
Module 1 - Channels 1–4
Module 2 - Channels 5–8
Module 3 – Channel 9–12
Module 4 – Channel 13–16
WARNING
Missing alarm
The deactivation of an input module channel after its assignment to an alarm can
cause the alarm to not be activated as desired.
► Do not disable any input module channels after they have been assigned to a
single or group alarm.
Feature Description
Modules (mod-
ule) Displays the module type (mA = input module; Rly = relay mod-
ule; – = no module). Module 1 and 2 can be an input module or
no module. Module 3 and 4 can be an input module, a relay
module or no module.
A1 relay Sets the A1 relay (pre-alarm) with regard to latching or non-
latching.
A2 relay Sets the A2 relay (main alarm) with regard to latching or non-
latching.
Fault relay Sets the F1 relay (Fault 1) with regard to latching or non-latch-
ing.
Channel Selects the settings for the input channel (4–20) (see chapter
A.5.1 on page 34).
Relay Selects the relay settings (see chapter A.5.2 on page 35).
Passwords Resets the access passwords.
Date & time Sets the time and date of the control unit. The date format is
YYYY/MM/DD. The time format is HH:MM:SS (when setting the
time, the seconds reset to zero).