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GTC-540
Instruction Manual
■ Check wirings for operation power, detection parts, alarm parts, and concentration display.
■ Check the power input then turn ON the power S/W.
■ Check whether power LED at alarm and concentration display parts light on.
■ Check whether "SELF" is displayed on FND concentration display part.
6.1. Power ON
- After GTC-540 power turns ON, the current firm ware version is displayed.
- VER is displayed for 0.5 sec on FND then number displays.
- The current version is 2.13.
- After warming-up by "SELF" flashing for approx. 30 sec on FND of concentration display,
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it immediately enters the measurement mode.
- Upon an event of fault of the equipment or detector at this time, fault alarm appears.
- Displays gas concentration received by the detector on FND digital display in numbers.
- Gas concentration is also displayed by 3-color bar graphic LED. Concentrations below the
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primary alarm concentration in green, below the secondary alarm concentration in orange,
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and above the secondary alarm concentration in red.
- 3-level alarm thresholds are always displayed by 3-color bar graphic LED. Alarm1 threshold
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in green, Alarm2 threshold in orange, and alarm3 threshold in red.
- When the detector is not connected or input current from the detector is under 10% below the
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set high scale value, "Undr" displays and flashes at 1 sec interval
- Trouble LED lights on, warning light flashes, and buzzer sounds
- When "BZSTOP" S/W is pressed, warning light lights on and buzzer stops
- When the input current from the detector is over 10% above the set high scale value, "ovE"
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displays and flashes at 1 sec interval.
- Alarm 1, 2, 3 LED lights flickers, warning light flickers, and buzzer sounds.
- When "BZSTOP" S/W is pressed, warning light lights on and buzzer stops
- Top circular LED of the 3-Color bar graphic LED lights on red.
- When gas concentration is detected to be above the set value for alarm, alarm function counts
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the dwell time and if it is above the set dwell time, alarm function operates.
- Alarm relay turns on when it is above the alarm dwell time.
- When Alarm Latch Type is at "ON" mode and alarm function runs, the alarm status and gas
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concentration value stays at the maximum value. When gas concentration decreases below
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the alarm value, alarm does not get released and "RESET" S/W must be ran to release it.
- When Alarm Latch Type is OFF, Alarm is released automatically in accordance to gas
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concentration.
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X.XX
6. Operation Method
6. Operation Method
■ Pressing "TEST" S/W for 2 sec or longer in gas concentration display mode enters Test mode.
■ In test mode, when it passes 30 min after the last S/W control, it automatically returns to the gas concentration
display mode.
6.2. Test Mode
- When it enters Test mode, gas concentration number displays and flickers.
- This function enables testing at channel unit without injecting gas to the detector sensor. It can
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set an arbitrary concentration when the user presses "Test" S/W and alarm function operates
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normally with a user-defined concentration.
- When "FUNC" S/W is pressed 2 sec or longer, it enters FND / LED / Bar LED Test function.
- 3-Color bar graph LED displays green, orange, and red at 0.5 s interval and each function
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LED flickers at 0.5 s interval.
- When "RESET" S/W is pressed, it returns to gas concentration display mode.
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Full Range
■ Pressing "DOWN" S/W for 2 sec or longer in gas concentration display mode enters Stand-by mode.
■ PWhen ETO (Emergency Time Out) is set to ON in Option Setting Mode, it automatically returns to gas
concentration display mode after 30 min.
■ PWhen ETO is OFF, "DOWN(Stand-by)" S/W must be pressed 2 sec or longer to return to gas concentration
display mode.
6.3. Stand-by Mode
- In stand-by mode, STD-BY LED flickers. Trouble/Alarm relay of GTC-520F contact output
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does not operate but all other functions run.
- When "DOWN(Stand-by)" S/W is pressed 2 sec or longer, it returns to gas concentration
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display mode
