Curtis Dyna-Fog 2742, Manual

Page: 41 / 84

SELECTOR SWITCH FUNCTIONS (Continued)
3 Connects low rate readout in milliliters/minute to digital meter and
located decimal point one place from right. Voltage of 54.0 millivolts
corresponds to 54.0 ml/min.
4 Connects high rate readout in milliliters/minute to digital meter and
leaves decimal point blank. Voltage of 54.0 millivolts corresponds to
54.0 ml/min.
5 Sycroflow mode. (Optional feature, a syncroflow cable must be
purchased for this feature to operate.) In syncroflow mode of
operation, connects speed indicator readout in miles per hour to digital
meter and locates decimal point one place from right. Voltage of 20.0
millivolts corresponds to 20 mph. In manual mode of operation,
connects potentiometer supply to digital meter. When engine is
running and output switch is not on, readout should read 30.2 +/-1.0.
This number indicates that the system should be calibrated. When the
output switch is on, this number should read 25.2 +/-1.5. This number
indicates that the potentiometer is connected and the instrument
ground is firmly connected.
RATE POTENTIOMETER
Output rates are commanded by a rate potentiometer which in the manual mode is
supplied from the + 10.00 volt power supply through a 1000 ohm resistor and in the
syncroflow mode directly from the output of speed decode module. The range of
output is determinated by the High/Low connections inside the Pump/Control
assembly (consult Factory). In the High rate (Standard setting of the machine), the
command is 0 to 18 oz/min (0 to 540 ml/min) and in the Low rate, the command is 0
to 1.8 oz/min (0 to 54.0 ml/min). In Syncroflow each of the rates is varied as a
function of the vehicle speed. As the vehicle speed is reduced the output is reduced
proportionally.
INDICATOR LIGHTS
LIGHT FUNCTION
Machine Indicates that machine switch is ON. Supplied by +12VDC power.
Spray
Shows that spray mode has been selected by toggle switch on panel.
Flush Shows that spray mode has been selected by toggle switch on panel.
Output Shows that output is ON. Will light only when blower pressure switch
is activated by pressure developed in nozzle boom.
Fault Comes on when speed exceeds 22 mph or when output rate exceeds
selected instrumentation or control range.
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