8
2.
LCD display
Time
Date
Secondary display
Warning: calibration
required
RS485 address of the
current transmitter
„Channel“ of the
current transmitter
Interrupted RS485
bus indication
Transmitter calibration
via RS485
Marker (selecting a
transmitter in the
menu)
Malfunction of the
controller or a
connected transmitter
Exceeding the
critical temperature
level
Indication of an alarm
record in the history
Flooding indication
Exceeding the time-
weigted avarage
Alarm PEL - long-
term exposure limit
Alarm STEL - short-
term exposure limit
Gas leek alarm
Type of detected gas /
substance
Measured units
Main segments of
the display,
currently measured
concentration
3.
Launch of the controller
After turning on the power supply, the whole LCD Display lights up and loads the highest meassured concentration, which
remains on the display for cca 3s. After that the controller goes into preheating mode. The main LCD displays a countdown to
the end of preheating and the secondary segments display the inscription „HEATING“.
4.
Basic status/alarms
The controller displays the concentration on 4 main segments. To it's right, units and the detected gas are being displayed. The
8 auxiliary segments display the location or an evnetual sensor malfunction. If the displayed channel is digital
(1 to
32), the adress
of the connected sensor is also displayed. Connected analog transmitters
have a range
of 41 to 48. The controller sequentially switches the configured channels in a 3s interval. If we want to select a transmitter
manually, we can do so with the buttons LEFT and RIGHT.
The status of the sensor bundled with an output relais (alarms, time-weigted avarages, statuses of temperature sensors and
floodings, malfunctions) is displayed in the right part of the LCD.
In case of an increased concentration, the LED ALARM starts shining and the controller switches to the channel, which
meansured this concentration. After 30s the channels will again be sequentially switched.
The latch function
– catalytic and semiconducter sensors can, when exceeding the measuring range, indicate a lower
measured value than it really is. If the measured concentration of these sensors exceed 100% of the lower explosion level, the
latch will activate. Even after a drop of the measured concentration, the transmitter will still be in it's highest alarm level. The
detection area must be physically checked by an independent transmitter and after that the controller can be unblocked by
pressing the ENTER button.
The ENTER button also serves as a confirmation button for the acoustic alarm.
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