www.gemu-group.com28 / 71GEMÜ 1435 ePos
14 Commissioning
14.1 Without default setting (when supplied without a valve)
CAUTION
Risk of injury or damage possible
● For correct commissioning, the product must be calibrated to the process valve via the initialization process.
● During this commissioning, the valve is automatically opened and closed several times. It must therefore be ensured in ad-
vance that this does not lead to a dangerous situation.
The product has 2 control medium connectors.
1. Connect the pneumatic tubes and activate the pneumatic control air supply of max. 6 bar.
2. Connect the connection cable tension-free and without any bends or knots.
3. Switch on supply voltage.
4. Use the corresponding keys to navigate to the Init ALL parameter in the menu, use the red key to select Init ALL and press
and hold the green key for 3 seconds.
5. Initialization is carried out.
NOTICE
Valve travel times (up-down, down-up)
▶ The valve travel times are measured and displayed. If these measure < 1 second, an error is displayed and the valve travel
time must be set to at least > 1 second using the throttle screw(s). This step may need to be repeated several times until an
optimal valve travel time can be achieved. Experience has shown that valve travel times of approx. 1-2 seconds produce op-
timal control characteristics. The two valve travel times should ideally not be too far apart.
NOTICE
▶ It may be necessary to close the internal positioner throttle screws a little (D1 for single acting actuators, D1 and D2 for
double acting actuators) if the actuator volume is low in order to increase the valve travel times. The travel times must
measure > 1 second, otherwise this may result in vibration behaviour of the positioner.
NOTICE
Tip for use
▶ During automatic initialization of actuators whose movement profiles are not continuous (i.e. with undefined stopping or
stalling, e.g. with large size butterfly valves), it may not be possible to clearly detect the end positions and unjustified error
messages may appear (e.g. LEAKAGE).
▶ Manual initialization with sequential movement through the menu by the operator* or, if possible, acknowledging the error
message to repeat the step may help here.
*Only possible in the Advanced system mode
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