Magnum Venus Plastech Flex Molding Process MKVI Mix - Manual (Page 60)

MKVI Mix Meter System Operations Manual
Rev. 08/2013 Page | 60
RGA adjustment
The time between strokes permitted to pass before the RGA alarms and the volume of
the alarm whistle can be adjusted by the user.
The pneumatic RGA is located in control box; the mechanical timer is shown in the
figure below. Turn the knob to adjust the timer to the required time, between 20
– 300
seconds. The dial shows seconds divided by 10, therefore to set the timer to 100
seconds, adjust the dial to 10.
RGA mechanical timer
The RGA alarm whistle volume can be changed by adjusting the flow controller that is in
line with the whistle.
Catalyst/Hardener Over-Pressure Valve - OPV:
The machine features catalyst over-pressure protection. In addition to the industry
standard inclusion of a pressure relief valve in the catalyst circuit, the control circuit will
detect the over-pressure condition and stop the pump from running. In injection or
recirculation modes, this is equivalent to pressing the stop button.
For example, if during an injection the catalyst system is over-pressurized, the injection
will stop, the mixing head will return to the recirculate position and the TAS signal will
exhaust.
A visual indicator (see Operation Controls) is provided on the side of the control box,
which will change from black to red in the event of a catalyst over-pressure condition.
To reset the over-pressure control circuit, the catalyst pressure must be relieved and the
reason for the condition must be remedied before the machine can be operated in
injection or recirculation modes.