BOC Edwards CV-6SL, Instruction Manual

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3.8.2 Gun "Ready"
When all the interlocks are satisfied, "Closed", the circuit is ready for the gun to be turned ON.
The indicator in the gun off switch, G1-I2, will be illuminated. The circuits that must be
satisfied for gun operation are:
Remote Off G1-J2 Green-Black
Gun Control Off G1-S1 Control Panel
Tank Interlock G1-J2 Orange-Black
Vacuum Interlock G1-J2 Green-Red
Auxiliary Interlock G1-J2 Blue-Red
Water Interlock G1-J2 Yellow-Red
Position Supply Adjustment G1-J2 Brown-Red
3.8.3 Gun "ON"
The "Gun ON" command turns on the filament power supply. The filament supply is
controlled by a closed loop regulated circuit. At turn ON, the filament ramps up and regulates
to the current level commanded by the bias potentiometer, a screwdriver adjustment on the
control panel. If high voltage is ON, the high voltage regulator sends a signal to the filament
regulator to transfer the reference command from the bias adjustment potentiometer to the
emission current potentiometer, also located on the control panel, with a calibrated 10 turn dial.
If high voltage is off, the filament current command adjustment stays with the bias adjustment
pot until such time the high voltage is turned ON.
The output vacuum relay, located in the "filament transformer module", switches the high
voltage output onto one leg of the high current filament transformer, secondary. In a single gun
system, the relay does not transfer until both the high voltage and gun circuits are turned ON.
3.8.4 Gun Power Supply Metering
The 3 1/2 digit LCD meter has a selector switch. G1-S4 that provides the operator with three
circuit-monitoring positions.
Emission current: The current is monitored in the high voltage leg of the gun circuit. The
maximum emission current is read as "600"mA.
Filament Current: The primary current of the filament transformer is monitored, rectified and
provided as an external readout (7.5V = 75 amperes) and the meter will read "75.0" amperes.
A remote filament current monitor is provided as 7.5V = 75 Amps.
Position Current: The output current of the position power supply is monitored and will read
"3.00" amperes. There is no external readout for position current.