11
e)
Using „ “ switch between „YES“ - save settings, or „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the date
a)
Using „ “ select a number in thousands. Save the selected number „ “
b)
Using „ “ select a number in hundreds. Save the selected number „ “
c)
Using „ “ select a number in tens. Save the selected number „ “
d)
Using „ “ select a number in units. Save the selected number „ “
e)
Using „ “ switch between „YES“ - save settings, or „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the time
a)
Using „ “ select a number in thousands. Save the selected number „ “
b)
Using „ “ select a number in hundreds. Save the selected number „ “
c)
Using „ “ select a number in tens. Save the selected number „ “
d)
Using „ “ select a number in units. Save the selected number „ “
e)
Using „ “ switch between „YES“ - save settings, or „NO“ - return to the Settings menu. Confirm the selected
option „ “
9.
Menu Test „TEST“
Protected by password 0004. By entering a wrong password, the transmitter returns to measurement mode. The password
can be changed in the menu SET->PSWD.
Menu
4.20 mA current loop
test
Using „ “ sets the output current in a 4-22 mA range. Return to Test
menu „ “
Digital communication
test
Using „ “ sets the concentration broadcasted via RS485 in measuring
range of the sensor. Return to Test menu „ “
Transmitter restart
Using „ “ switch between „YES“ - for restart, or „NO“ for returning to
Test menu. Confirm „ “.
Return to main menu
Return to main menu
Operation and maintenance of the transmitter
1.
Usage limits
To maintain proper operation of the transmitter it is necessary to respect the fact that step changes of humidity, condensation
or rapid changes of pressure can cause incorrect indication of the measured value. Each sensing technology is suited for
different methods of application, as described below. All sensors are characterized by a smaller or larger cross-sensitivity to
other gases than those which they are set for. Therefore we recommend to have the air in the deployment area of the
detection system analyzed before processing project documentation.
a)
catalytic sensors:
Trace amount of vapors of silicon compounds and sulfur compounds cause a permanent loss of sensitivity,
which requires recalibration or replacement of the sensor. Longterm crossing of the measuring range causes a decrease in
