GDS GasVac LG-1, Руководство по эксплуатации

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2
SYSTEM OVERVIEW
The Land Gas Monitor is designed to be used in a safe area, external to the area being monitored
for potential hazardous conditions, measure up to 8 different gases whilst checking for alarm
conditions. A vacuum pump draws the gas to the sensors on a continual basis resulting in gas
readouts being displayed on the screen, the pump system also incorporates a pump fail and line
blockage monitor.
The main computer board controls most actions. With an LCD display it is capable of indicating the
state of sampling or fault conditions. Likewise, dimmable LED’s and relays give additional displays
of the system state. Many parameters are programmable and are retained when power is off, in a
none volatile memory chip. These parameters are reloaded at the next power up so that the system
will perform as previously set.
A real time clock keeps track of time and this time value is appended to any panel events such as
alarm or fault etc. The events are retained in a 99 event memory which can be viewed on the LCD
or sent to a PC via the RS232 channel.
The RS232 channel can also accept parameters from a PC and if needed, can send the panels
parameters to the PC. Using simple text files, these can be edited and sent back to the panel.
In addition to 8 gasses, an optional cabinet flammable only gas is monitored in the panel and will
cause power shutdown if it goes into alarm, preventing the possibility of local gas ignition.
Engineering and User mode menus are available via password entry and allow parameter changes
and system checks to take place. However, muting the buzzer which sounds if an event occurs can
still be silenced by pressing any key.
Sensors connected on the CAN bus can have their address changed using ENGINEER’S menu 27
(Described in appendix:1).
Please note:
Connected sensors are recorded as present by the panel. If a sensor is removed, and then the panel
is switched on, a fault will occur showing the missing sensor.
Use ENGINEER’S menu 16 to clear all addresses if required.
Front panel LED’s indicate the general state of the panel. The red alarm LED will flash for new
alarms until accepted/muted when it stays on constantly until reset. The amber fault LED comes on if
a fault is present. If any sensor channel is inhibited the amber inhibit LED will be on.
Additional reset and mute terminals are available to allow remote action in the event of an alarm or
fault condition. Test facilities are included in the engineer’s menu, which allow relays to be manually
activated during commissioning.