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7.4 Sensor head substitution
If necessary, the sensor head can be substituted. First of all, the user must request to Sensi-
tron and Sensitron will give a proper kit and instructions.
It's strictly forbidden open and close the equipment when it's installed in hazardous area and
it's powered-on. This operation can be conducted in safe zone and without power source.
After 10 minutes from power source interruption, the equipment can be opened.
It's strictly recommended the use of personal protective equipment during operations in-
side the enclosure.
In case of tapered thread, use a thread-lock glue (Loctite 243 for example) on 2-3 threads.
7.5 Cleaning
The detectors must be kept clean of dust deposits, in particular when the equipment has
a varnished aluminium enclosure. Cleaning must be performed with damp cloths or with
cloths that do not accumulate electrostatic charges. It's strictly forbidden the dust cleaning
using compressed.
Gas detectors must be cleaned in order to avoid any risk of infection.
7.6 Data restore to default parameters
To restore the default parameters, the user has to connect to the calibration software (avail-
able on request), through the RS485 serial line and click on the "Restore Defaults" button.
7.7 Disassembly instructions
Power the unit off, disconnect the wires on the terminals and dismount the housing from
any blocking systems.
7.8 Trouble shooting guide
The following tables list all type of errors, which can be viewed on the calibration keyboard
display, with corrective actions to solve them.
Type of error Possible cause
Power sup-
Power supply lower than 10
ply error
Vcc or higher than 30 Vcc
A n a l o g u e
Analogue 4-20 mA output
output error
error. It could be open.
Head
not
Head and/or sensor missing
present
ENGLISH
WARNING!
Table 3)
Recoverable error
Corrective action
Set the power supply in the range 10-30 Vdc
and reset the device with the calibration key-
pad
Correct the open circuit and reset the device
with the calibration keypad
Connect the sensor head and reset the de-
vice with the calibration keypad
Pag. 32
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