GTD-3000Ex
Instruction Manual
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 m of stabilization of time is needed from the initial supply of operation power and it
starts to operate normally after sufficient stabilization.
GTD-3000
[Ver X.XX]
- When the power turns on, model name is displayed on the first row and firmware version of the
detector is displayed on the second row of LCD.
** SELFTEST **
[>>>>>>> 0179]
- Self test is performed for 3 min '>' symbol in the second row shows the progress.
[ COMB.]
[ 0]%LEL
- It runs as below when it is normal and in gas measuring mode.
- Gas name is displayed on the first row and the current measurement and unit is displayed
on the second row.
※ During HART 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.
※ During 485 network, '*' is displayed on the right of the first row.
* [ COMB.]
< 0]%LEL
[ COMB.]*A01
[ 0]%LEL
[ COMB.]
[ OVER]%LEL
- 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.
[ COMB.]
[ UNDER]%LEL
- When gas measurement smaller than -10%, "UNDER" displays in 1 sec interval and 4~20 mA
runs at 2 mA.
※ The following function only runs when UNDER is on.
[FAULT- 01]
SENSOR EMPTY
- When trouble occurs in the device, it displays fault number and message.
- At this time, 4~20 mA runs at 0 mA. (2 mA when HART is used.)
- It is a mode that displays when Fault #-1 sensor on the left is not equipped.
6.2. Measuring Mode
■ After power on, when there is no error from "SELF TEST", it automatically enters Measuring Mode.