9
DIMMING THE LED’S
(11)
The LED’s on the main processor board and the LCD display are normally bright but can be
dimmed to give a more acceptable level of illumination in subdued control room conditions.
The
DIM (6)
button on the main panel when pressed will toggle the brightness between maximum
and dimmed for both. The level to which dimming occurs can be set via the User Menu number 11.
This shows the current brightness setting and then using the
UP (1)
and
DOWN (5)
buttons a new
dim level can be set and this is shown on the LCD and on the LEDs themselves. This dim value is
stored in none volatile memory for future use and subsequent power ups. In addition to dimming
the LED’s, the LCD backlight is also dimmed and to enable a balance between LCD brightness and
LED brightness. If a repeater is connected to the main panel then the dim levels are also activated
using the same buttons on the repeater.
MUTE THE BUZZER
When an alarm or fault condition occurs the buzzer on the main processor board will sound.
By pressing the
ACCEPT
button
(1)
on the front panel, the buzzer will become silent.
FLOW FAIL AND PUMP FAIL
The pressure of the pump(s) in the sample system are monitored and a loss of pressure is detected
and gives rise to a pump fault which is logged into the 99 event memory and will indicate flow fail.
Pump failure can occur from loss of power or from a worn out diaphragm. Preventative
maintenance should ensure that this event is rare.
LOCAL AND REMOTE RELAYS
The local relays are as follows (all contacts are rated at 5A 250Vac)
Common Over range alarm
will energise if any gas is over range. S.P.C.O
Common High alarm
will energise if any gas is in high alarm. D.P.C.O
Common Low alarm
will energise if any gas is in low alarm. D.P.C.O
Fault
will de-energise if any fault exists in the system. S.P.C.O
Option 5
will energise if voting 5 conditions are met. S.P.C.O
Option 6
will energise if voting 6 conditions are met. S.P.C.O
Option 7
will energise if voting 7 conditions are met. fault/S.P.C.O
Option 8
will energise if voting 8 conditions are met. S.P.C.O
A small relay on the front panel energises if a sensor is inhibited.
This includes “power up inhibit” periods.
