Honeywell HERMetic UTImeter Gtex Chem IIC, Operation And Service Manual, Page: 48 / 83

50489/GTEX Chem IIC/1805 UTImeter Gtex Chem IIC
48
10. Trouble shooting
10.1. Safety warning
As this equipment is designed and approved for use in an explosive area (intrinsic safe equipment), only
authorized service stations and the factory are allowed to repair electronic circuits.
However the customer can exchange parts and modules if the following points are observed :
1. Never open the instrument nor carry out any repair or trouble shooting in an hazardous area.
2. Use only original spare parts.
3. Work shall be done only by maintenance personnel who has an experience with intrinsically safe
equipment.
The design of the equipment is modular, i.e. in case of breakdown the customer can find out which modules
have to be replaced. The instrument consists of the following modules:
- Mechanical parts
- Sensing probe
- Tape assembly
- Display unit / electronic box
- Tape cleaner
The following sections should allow to identify the defective module and to replace it.
10.2. Power supply troubles
Symptom Origin Action Section
The unit does not switch
on
Battery too low Change the battery 10.3
Corrosion of terminals
(battery side)
Clean the battery terminals ---
Corrosion of terminals
(display unit side)
Clean the display unit terminals ---
Switch defective Change the display unit 10.7
The unit switches on but
stops on the message
"battery"; the buzzer
tones continuously
Battery too low Change the battery 10.3
10.3. Transmission troubles
Symptom Origin Action Section
"No Msg " is displayed
Sensor out of work or Renew the sensor 10.5
Tape out of work Renew the tape 10.4
"Invalid" is displayed Sensor out of work Renew the sensor 10.5
"Unknown" is displayed Sensor out of work Renew the sensor 10.5