Adjustment Procedure - Metra Electronics GPC Operating Manual

8.3. Connection to power supply:
The Metra MGC connection to power mains must be performed by a qualified electrician having electrical safety
access.
• Connect the ground to the general grounding circuit.
• Connect the power cable to the network.
9.1. Switching on the METRA GPC:
1. Reset the button 'EMERGENCY STOP' by turning it.
2. Set the 'NETWORK' knob to 'ON' position. Indicator lights will turn on in the presence of voltage.
3. Set the 'SPEED' knob to the middle position.
4. Switch on the power of the frequency converter, by setting the power lever to the 'ON' position.
5. Switch off the METRA GPC by setting the handle to the 'OFF' position.
6. The Pre-Cleaner emergency stop is carried out by pressing the 'EMERGENCY STOP' button.
When the METRA GPC is supplied with the Metra Separators, it is powered from the Metra separator. In this case,
items 1 and 2 are not required.
Press the 'EMERGENCY STOP' button only in cases of emergency!
9.2. Operating modes settings:
1. Switch 'ON' the METRA GPC as described above.
2. During operation of the PMETRA GPC, the user should control constant supply of feed material to be separated. Set
the baffles in upward position, so they are in '0' position.
3. Use the speed control knob to choose the speed of the grading mesh rotation, so to maximize the separation of large
and small fractions. Please note that increasing the grading mesh rotation speed may allow the improving of selection
for the major fractions, but care must be taken so that there is no pick-up and removing of the needed grain material
into the waste bins through the impurity tunnels.
4. In this mode, when properly adjusted, the METRA GPC is able to remove 30% to 60% of the original waste material,
depending on the quality of the feed material.
5. To obtain a better preliminary cleaning, it may be necessary to make sure that the cells of the grading mesh correspond
to the size of the material. If necessary, replace the mesh.
Please note:
The capacity of the METRA GPC can be increased (the amount of grain fed into the separation chamber
can be increased) until the process of cleaning gets worse.
different commodities, so the user is to determine individually.

9. ADJUSTMENT PROCEDURE

The extent of cleaning quality improvement varies for
8