Va-Tran Sno Gun III User manual

SG-PST-III - Page 1 of 3
Overview:
The SnoGuntm Power Supply/Timer (SG-PST-III) will supply timing pulses to
the SG-2A-24DC Automated SnoGuntm as programmed by the operator. The
circuit is programmed to operate in five "Run" modes: One-Shot, Repeat Cycle,
Counted Repeat Cycle, Toggle, and Direct. Two "Purge" modes, Timed or
Continuous, are also available. The SG-PST-III is programmed using the
display on the front panel. "On" and "Off" times may be independently chosen
from 0.01sec to 99.99 seconds each. The footswitch and "Trigger" switch serve
the same purpose.
(CHG PRE)
Change Preset
(MSG)
Message Display
() and ()
Cursor right or left
(+) or (-)
Scrolls up and down and
between variables
(ENT)
Enter
Description of Modes:
Run Modes:
One-Shot
After the footswitch or "Trigger" switch is depressed, the output will be enabled
for the amount of time determined by the time set in the "On-Time" variable.
The green "Timed On" light will be illuminated when the output is enabled. The
footswitch must be released before another cycle can be triggered.
Repeat Cycle
After the footswitch or "Trigger" switch is depressed, the output will be enabled
for the amount of time determined by the time set in the "On-Time" variable.
The green "Timed On" light will be illuminated when the output is enabled.
The output will then be switched off for the amount of time set in the "Off-
Time" variable. The red "Timed Off" light will be illuminated when the output
is off. After the "Off Time" has been completed, the cycle will continue to be
repeated. The cycle is terminated by another press of the footswitch or the
"Trigger" switch.
Sno Guntm Power Supply/Timer III
Operating Instructions
SG-PST-III
Keypad Legend

SG-PST-III - Page 2 of 3
Counted Repeat Cycle
After the footswitch or "Trigger" switch is depressed, the output will be enabled for the amount of
time determined by the time set in the "On-Time" variable. The green "Timed On" light will be
illuminated when the output is enabled. The output will then be switched off for the amount of
time set in the "Off-Time" variable. The red "Timed Off" light will be illuminated when the output
is off. After the "Off Time" has been completed, the cycle will continue to be repeated until the
number of "on" cycles equals the quantity in the "# cycles" variable. The cycle may also be
terminated by another press of the footswitch or the "Trigger" switch.
Toggle
After the footswitch has been depressed, the output will be on even when the footswitch is released.
The output will remain on until the footswitch is pressed again. The green "Timed On" light will
be illuminated during the cycle.
Direct
The output of the SG-PST-III will be directly tied to the footswitch. When the footswitch is
pressed, the output will be on. The output will remain on until the footswitch is released. The
green "Timed On" light will be illuminated during the cycle
Purge Modes:
The purge mode is entered by pressing the footswitch twice in rapid succession (1/2 second). This
mode may also be entered by pressing the switch marked "Purge" on the front panel. The amber
light marked "Purge" will be illuminated whenever the purge mode is entered
Timed Purge Mode
In this mode, the purge will continue for the amount of time set in the Purge Time Variable. This
timed mode may be interrupted by pressing the footswitch during the purge.
Continuous Purge Mode
In this mode, the purge will continue until the footswitch is released.
Programming:
To enter the program mode:
Press the button in the upper left corner of the keypad marked (CHG PRE).
The Change Preset mode will be entered and the variables may be scrolled through by
pressing the (+) and (-) buttons.
When the variable that is to be changed is selected, press the Enter (ENT) key in the
lower right corner of the keypad.
The Enter key toggles the cursor between the variable name and the variable value.
When the variable value is selected, use the "Cursor Right"()and "Cursor
Left"()keys to move the cursor among the 4 digit positions. Use the (+) and (-) keys
to change the mode, enter a time or the number of cycles. Press (ENT) to continue
editing.
When editing is complete, press (MSG) to return to the Main Message Display.

SG-PST-III - Page 3 of 3
The SG-PST-III represents time in 10ms increments, a value of 10 represents a 100ms pulse, a
value of 100 represents a 1-second pulse, etc. Each digit of the number can be changed
individually or the entire number may be incremented by accessing the right-most digit. The range
of value change is from 0000 to 9999. Incrementing (+) past 9 or decrementing (-) past 0 carries
to or borrows from the digit(s) to the left of the cursor position.
Note: Pressing the arrow keys () ()when selecting variables will select the counter and timer
preset functions. These functions are disabled - timers and counters must be set in the Change
Preset Mode. If the timer and counter preset functions are entered, continue to press the arrow key
until the Change Preset Mode is re-entered.
WARRANTY INFORMATION
Products manufactured by Va-Tran Systems are warranted free of original defects in material
and workmanship for a period of one year from date of purchase or lease. This warranty does
not include o-rings, seals, wear parts, or failures caused by lack of proper maintenance,
incompatible fluids, or foreign contaminants. Products believed to be defective may be returned
upon written approval by Va-Tran Systems, freight prepaid for repair or replacement.
Any modification to any Va-Tran product by the customer is done at the customer’s sole risk and
responsibility. Va-Tran disclaims any claims, demands, or causes of action for damage or personal
injuries from the modification and or use of such a modified product.
Va-Tran Systems’ obligation with respect to its products shall be limited, and in no event shall Va-
Tran be liable for any loss or damage of whatever kind or nature, or any other expense which may
arise inconnectionwithor asaresult ofsuch products beingused. Ifrepair isnecessary,itisrequired
that you obtain an RA, returned authorization, number from Va-Tran Systems, Inc. Address, phone
number, and Internet address are as follows:
Va-Tran Systems Inc.
677 Anita St., Ste 'A'
Chula Vista, CA. 91911
619-423-4555
Fax [phone]
[email protected]
www.vatran.com