When operating the positioner with natural gas, you must follow and adhere to the following
safety notes:
WARNING
Operation with natural gas
1. Only positioners and option modules which are connected to power supplies with type of
protection "Intrinsic safety, protection level [ia]" may be operated with natural gas.
2. Do not operate the positioner with natural gas in closed spaces.
3. Natural gas is continuously blown off, depending on the model. Special care must therefore
be taken during maintenance activities near the positioner. Always ensure that the
immediate surroundings of the positioner are adequately ventilated.
The maximum values for ventilation are listed in section "Technical data (Page 239)".
4. If you operate the positioner with natural gas, it is not permitted to use Mechanic Limit
Switches (MLS).
5. Depressurize the devices operated with natural gas adequately during maintenance
activities. Open the cover in an explosion-free atmosphere and depressurize the device for
at least two minutes.
Note
Quality of natural gas
Only use natural gas which is clean, dry and free from additives.
7.2 Overview
Note
● During the initialization process, the operating pressure must be at least one bar more than
that required to close or open the valve. However, the operating pressure should not be
greater than the maximum permissible operating pressure for the actuator.
General information about commissioning
1. After installing the positioner on a pneumatic actuator, you must supply electric and
pneumatic auxiliary power to it.
2. The positioner is in the "P manual mode" before initialization. At the same time, "NOINI"
blinks in the lower line of the display.
3. Position feedback: You can adjust the range of position detection using the friction clutch if
necessary.
4. Adjust the positioner as per the respective actuator with the help of the initialization process
and by setting the parameters. If required, use the "PRST" parameter to cancel the
adjustment of the positioner on the actuator. The positioner is again in the "P manual mode"
after this process.
Commissioning
7.2 Overview
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE 107
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