GTC-200A
18
6-3. How to operate channel unit
6-3-1. Check of wiring
- Check wirings to operation power, gas detector, common unit and channel unit with
reference to Terminal wiring diagram (Section 5).
* Power supply is AC110/220V, 50/60Hz. (Please make sure to check power type before
turning on power)
6-3-2. Power ON
-.Turn power on after checking voltage of power supply.
-.Check power LED turned on at common unit and channel units.
-.
Check “SELF” on FND at channel units.
6-3-3. Display of gas density
-.After power on of Channel Unit
, “SELF” on FND at channel unit is flickering
about 15 seconds and the channel unit goes into measurement mode. If
the unit or gas detector has trouble, trouble signal occurs at this time.
-.Channel unit displays gas density received from gas detector as number
type on FND digital display.
-.Gas density is also displayed with 3 Color Bar Graphic LED
Under 1
st
Alarm density: Green color
Above 1
st
Alarm and under 2
nd
Alarm density: Orange color
Above 2
nd
Alarm density: Red color.
-. If there is no connection with gas detector or trouble at gas detector,
channel unit displays “Undr” with flickering (0.5 sec interval).
-. Trouble LED Lamp is also turned on.
-. Lowest round LED at 3 Color Bar Graphic LED is turned on with Red color.
-. If current value received from gas detector is 10% higher than
predetermined High scale value,
“OuEr” is displayed with flickering (0.5
sec interval).
-. Highest round LED at 3 Color Bar Graphic LED is turned on with Red color.
-.If gas density is higher than alarm setting value, corresponding alarm is
activated after Alarm holding time.
-.Alarm LED Lamp is flickering (0.5 sec interval) during alarm holding time
and turned on after Alarm holding time.
-.Alarm Relay is ON after Alarm holding time.
-.If Alarm Latch Type
is “on” mode, Alarm status and gas density value is
held at maximum value when alarm is activated. Gas density value held is
not automatically reset when real gas density is decreased below alarm
setting value and only can be reset by “Reset” key.
-.If Alarm Latch Type
is “off” mode, Alarm is reset according to change of
measured gas density.
6-3-4. Program Data setting
-. Push
“▲”, “▼” at the same time for over 2 seconds in gas density display
mode and goes into program data setting mode.
(During program setting mode, automatically return to density display
mode if there is no key input for 10 seconds.)
-. Firstly,
“dP-S” (decimal point setting) is displayed.
-.
Press “Func” key to go into decimal point setting mode.
-. If pressing
“RESET” key, returns to density display mode.
