Elkhart Brass Stinger RF8297 - Manual (Page 8)

5
Manual Overrides
The Stinger RF is equipped with manual override features for both the Up-Down and
Left-Right functions. These overrides are intended for use in the event of power failure,
or when a remote transmitter is not readily accessible.
Left-Right: To move the monitor left or right manually, push down and hold the
spring-loaded knob with the right hand while grasping the return bend with the
left hand. Using the left hand, either push to move the monitor to the right, or pull
to reposition to the left. Please note that the left-right motor drive unit reengages
only every 90

. There is no left-right locking feature while the motor drive is
disengaged; keep a hand on the return bend in order to maintain stream position.
Up-Down: A hand crank mechanism is provided to allow manual control of the
nozzle elevation. As a safety feature to prevent hand and finger injuries, this
crank handle is always disengaged from the motor drive unit. To engage the
crank handle (and simultaneously disengaged motor drive), push in on ball knob
in a direction parallel to the hand-wheel shaft. While holding the ball knob in,
turn crank in direction indicated on handle label to either raise or lower nozzle.
When on portable base, never position nozzle at less than 30°.
Safety Switch (See Figure 5)
The Stinger RF has a safety switch
feature to prevent remote operation of
the unit when it is not attached to either
the deck mount or portable base. This
feature is designed to prevent possible
serious finger injury due to entanglement
in the left-right drive gearing located
within the inlet area of the upper monitor
assembly.
Figure 5
Safety Switch
RF Receiver/Control Module
The monitor control circuit uses a state-of-the-art PIC (Programmable Integrated Circuit)
chip design. This device allows numerous control features while keeping circuit board
size to a minimum. Relays within this box provide motor reversing control for the
Up/Down, Left/Right and Straight Stream/Fog functions.
All functions are sent to the RF Receiver/Control Module via an encoded radio frequency
link. The radio link reduces the number of wires to just the two power leads for battery
charging, dramatically simplifying the installation procedure. The link allows wireless
control from up to ¼ mile away.
An encoder, part of the left/right motor, provides left/right motion control feedback. The
encoder allows the user to set endpoints at any combination of horizontal angles. The
counter in combination with the PIC controller enables the monitor to oscillate between
these endpoints.
The control system also provides secondary motor protection with the use of electronic
current sensing circuitry. If the monitor encounters an obstruction before reaching a
limit, this circuitry quickly senses motor stall current and automatically shuts off power