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6. Detector Operation Flow
6.1. Initial Operation Status (Power On)
■ After wiring to power terminal at the top of Main PCB board then supply power, the following contents are displayed
on LCD. Approx. 30 min of stabilization of time is needed from the initial supply of operation power and it starts to
operate normally after sufficient stabilization.
GTD-2000
[V X.XX]
- When power turns on, model name and product firmware version are displayed on LCD (OLED).
SELF TEST
[ >>>0179]
- Self test is performed for 3 min (30 min for O2 set-up), '>' symbol in the second row shows the progress.
[ %LEL]
[ 0.0]
- In normal operation mode, it runs as below.
- In the first row, measured gas name and unit are displayed in 1 sec interval. In the second row, the
current measurement is displayed.
- In the current screen, touching the magnet-bar on 'Func' key for 2 sec or longer changes to setting mode.
※ During Modbus network, '*' is displayed on the left of the first row.
※ ENG. When the mode is on, '<' is displayed on the left of the second row.
[ COMB.]
[ 0.0]
[ %LEL]
[ 30]
- When alarm1 or 2 occurs, it runs as below. (It only runs only when alarm used setting in alarm mode is on.)
- The first row runs the same as in normal status. In the second row, alarm message and gas
measurement are displayed in 1 sec interval.
- When GTL100 explosion-proof warning light is installed, upon an event of alarm1, red LED and buzzer
flicker and run in 1 sec interval. Upon an event of alarm2, they continuously run without flickering.
- If alarm latch is on, the alarm continuously run until it is released using the reset key.
[ %LEL]
[ ALARM1 ]
[ %LEL]
[ OVER ]
- When gas measurement larger than 10% of set high scale value, "OVER" displays in 1 sec interval.
At this time, 4~20 mA runs as 22 mA.
[ %LEL]
[ UNDER ]
- When gas measurement smaller than -10%, "UNDER" displays in 1 sec interval and 4~20 mA runs
below 2 mA.
※ The following function only runs when UNDER is on.
[FAULT8]
SEN HUNT
- When trouble occurs in the device, it displays fault number and message.
- At this time, 4~20 mA runs below 2 mA.
- Fault #8 on the left is a mode that is displayed when there is repeated hunting error from the sensor.
6.2. Measuring Mode
■ After power on, when there is no error from "SELF TEST", it automatically enters Measuring Mode.
