11. GRID CURRENT METER (Fig. 12-11)
The grid current meter indicates the current provided to the tube's grid during the melt cycle. The meter's
indicator will fluctuate when the oscillator is on, but should not exceed 450 Ma.
12. FILAMENT VOLTAGE METER (Fig. 12-12)
This meter indicates the voltage across the filament of the tube. This voltage should be 12.6 VAC .
13. AUTOMATIC/MANUAL MODE KEY SWITCH (Fig. 12-13)
This switch selects the mode of operation of the unit, Automatic or Manual. In the Automatic mode, the alloy
melt temperature, soak time and the casting operation will be controlled automatically. When the unit is
operated in the manual mode, the alloy temperature and casting operation are controlled by the operator.
14. MELT COIL LIFT LEVER (Fig. 14-1)
Located in the front panel, this lever raises the MELT COIL into position
around the crucible. A bearing on the crucible carriage fits into a slot
in the coil guide assembly.
To raise the melt coil,
A. Align bearing with slot.
B. Push coil release switch (Fig. 12-8) with your left hand
C. Raise the melt coil by pushing down on the melt coil lift ever (1)
with your right hand. Do not force the lever down. If any resistance
is felt, recheck guide alignment.
D. While pushing the lever down, release the COIL RELEASE SWITCH in your left hand.
E. To drop the MELT COIL, press the COIL RELEASE SWITCH (Fig. 12-8). In case of emergency, or when the
coil release switch is out of operation, push in the MANUAL COIL RELEASE, (Fig. 14-3).
15. SOAK TIMER - (Fig. 12-15)
A 0-60 second solid state timing device provides a controlled amount of soak time to the melt while at
temperature. The timing cycle is initiated only when the push button above the timer is engaged by the
operator. If engaged during the melting cycle, the timing sequence will start once the melt reaches
temperature. The timer will operate only in the automatic mode.
A. Soak time from 0 - 60 seconds can be pre-set with the use of the push buttons (FIG. 12-14) located at
the right side of the soak timer.
B. If the centrifuge cover is open, automatic casting will not occur at the end of the soak time. Centrifuge
casting will only occur when the cover is closed.
C. The bar graph indicates the amount of time remaining during the soak cycle.
16. WATER PRESSURE GAUGE (Fig. 14-2)
This gauge indicates the water pressure provided to the unit.
Electromatic - 4
15
WARNING:
To avoid any damage to the unit, only Authorized personnel should
operate this machine on the MANUAL mode.
FIG. 14
1
3
2
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