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5. Installation
GTD-1000Tx(M)
Instruction Manual
■ Power cable installation for each cable type is as shown in the table below.
AWG
mm2
COPPER RESISTANCE(ohms/m)
METERS
12
3.31
0.00521
3838
14
2.08
0.00828
2415
16
1.31
0.01318
1517
18
0.82
0.02095
954
20
0.518
0.0333
600
[Figure 9. Calculation of GTD-1000Tx(M) Installation Cable Length]
[Table 5. GTD- 1000Tx(M) Power Cable Installation Length]
6. Detector Operation Flow
Display board is connected and used during maintenance and repair. For normal display operation after connecting in
operation status, contact ‘RESET’ key.
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-1000
[V X.XX]
- When power turns on, model name and product firm ware version are displayed on LCD.
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 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.
