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GTD-1000Tx(M)
Instruction Manual
7. System Mode
A2 TYPE
[INC]
- It is a mode that sets operational direction of Alarm2. Contact "↑" or "↓" key to display "INC" or
-
"DEC".
- "INC" mode operates when the value is equal or larger than set alarm threshold. "DEC" mode
-
operates when the value is equal or less than set alarm threshold.
- Contact "FUNC" key when a desired mode is displayed to set then enter the next mode.
A2 TYPE
[DEC]
A2 DBAND
[ 0]%F
- It is a mode that sets Dead band value for Alarm2 operation. Use "↑" or "↓" key to set a value.
- It is a function where Alarm2 operates at values above the sum of Alarm2 level and dead band
-
values and releases at values below Dead band value subtracted from Alarm2 level.
- When a desired alarm 2 dead band is displayed, press "FUNC" KEY to set it and enter the next item.
A2 TIME
0 SEC
- It is a function to prevent instantaneous malfunction of detector due to external shock and
-
noise other than from normal operation and time can be set in a range between 0~60 sec.
- For Alarm2 dwell time setting, press "↑" or "↓" key to increase or decrease in unit of 1 sec, respectively.
- When a desired Alarm2 dwell time is displayed, press "FUNC" KEY to set it and enter the next item.
- Ex.) Alarm threshold value: 40% LEL / Delay time: When it is at 5 sec, Alarm triggers when the
-
measured value is above the set value based on 40%LEL for 5 sec or longer. When it goes down below
-
the set value within 5 sec, alarm is not triggered.
7.4. Device Mode
PASSWORD
[**]
- Contacting "FUNC" key for 2 sec or longer in Measuring Mode enters Password mode.
- After setting Password using "↑" or "↓" key, contact "FUNC" key.
DEVICE
MODE
- Contact "↑" or "↓" key to select “CALIBRA. MODE". When "DEVICE MODE" is displayed,
-
contact "FUNC" key to enter Device Mode.
- Contact "RESET" key to return to Measuring Mode.
485 B/D
CHECK
- It is a setting where connection status of RS-485 Board is confirmed.
- When it is connected, it displays CHECK. If not, it displays EMPTY.
ADDRESS
[ OFF ]
- It is a setting where RS-485 Modbus Address is set.
- Contact "↑" or "↓" key to change the address.
ADDRESS
[ 1 ]
8. Troubleshooting
8.1. Fault List
[Table 6. Fault List]
FAULT MESSAGE
DESCRIPTION & CONDITION
CAUSE
FAULT2
"SEN HIGH"
Sensor output is above ADC max. value.
Defective sensor module or transmitter board ADC
FAULT3
"SEN LOW"
Sensor output is below ADC min. value.
Defective sensor module or transmitter board ADC
FAULT4
"EROM ERR"
Defective Transmitter EEPROM Checksum
Defective Transmitter board EEPROM
FAULT5
"+24V LOW"
It occurs when 24 V main input power is inputed
with voltage below 17V.
Input power below 17 V or defective Transmitter
ADC
FAULT6
"ADC FAIL"
Defective Transmitter ADC
Defective Transmitter ADC
FAULT7
"H/W REV"
H/W Version Error
Defective MPU inside Transmitter
FAULT8
"SEN HUNT
When there is repeated hunting error in gas
measurement
Sensor output status may be poor or check for input
power noise.
8.2. Recovery List
[Table 7. Recovery List]
No
CAUSE
SOLUTION
1
Defective Sensor Module
Change Sensor
2
Defective Transmitter Board ADC
Change Transmitter Board
3
Defective Transmitter Board EEPROM
1) Perform Factory Initialization then correct parameter and re-calibrate
2) Change sensor unit when the same problem occurs again
4
Defective MPU inside Transmitter
Change Transmitter Main Board
5
Poor Sensor Output Status
Change Sensor
6
Check Input Power Noise
Check External Input Voltage Noise Status
