The Regard-1 can either be connected to a 4-20-mA transmitter or to
Polytron-SE-Ex mV sensing heads. There are three fully configurable
alarm relays: rising or falling, latching or non-latching. The alarm
status is displayed via three LEDs. They will flash with a new alarm,
light up continuously to display an acknowledged alarm situation or
extinguish if there is no alarm. The gas concentration is displayed
continually on a large LC display. If the alarm thresholds are exceeded
or if a fault occurs, the integrated audible alarm will sound. To
indicate a transmitter or system fault, a fault relay is provided, a
separate fault led is provided on the panel which will flash under new
fault condition, light continuously under acknowledged fault condition
or will be extinguished under normal or healthy conditions.
During maintenance, the maintenance or inhibit relay can be used to
report this special status via a remote display.
The robust IP65 enclosure enables the installation of the control system at virtually any location within safe areas.
The Regard-1 can be equipped with an optional TWA control module. This
module enables the output of a TWA alarm as well as the repeat of a 4 to
20mA signal and the alarm states via a digital interface.
To ensure the operation of the Regard-1 during a power failure, two
batteries of 1.2 Ah each can be inserted into the integrated battery
compartment. Depending on the transmitter used, they will enable an
operating time from 30 minutes up to two hours. The batteries are
re-charged by the Regard-1.
In accordance with the ATEX directive, the system is certified to EN
61779-1/4/5 and EN 50104 for explosion monitoring and oxygen measuring
and, therefore, also suitable for applications which require the
measuring function for explosion protection (primary measure in
accordance with EN 1127-1, paragraph 6). In addition, the system was
also tested independently to EN 45544 for the monitoring of toxic gases.