5)
VALVE SPEED
VALVE SPEED allows the user to vary the speed of the
SMARTVALVE stepper motor as it moves the position
of the Valve Plug to adjust the Gas Feed Rate. The
selections refer to seconds per revolution. Choices
are: 0.5, 1.0, 1.5, 2.0, 3.0, 5.0, 7.5, & 10.0. Factory setting
is 1.5.
NOTE:
To change this and all remaining Engineering
parameters, simply press
ADJ
. Scroll
UP
or
DOWN
to
the desired value. Press
ENTER
to accept. Press
NEXT
to proceed to the following parameter.
6)
VALVE HYS
VALVE HYSTERESIS places a “dead band” around the
input signal(s) to limit response to minor signal variations.
This helps prevent wear and tear on the stepper motor
and feedback potentiometer. Selections in percentage
are: Off, 0.06, 0.13, 0.25, 0.38, 0.50, 0.75, 1.00 and
2.00 %. Factory setting is 0.13 %.
7)
FAIL OPERATION
FAIL OPERATION allows the user to choose how the
SMARTVALVE will respond to a loss of the analog input
signal(s). Selections are
HOLD
or
DROP
. HOLD will
keep the Feed Rate at its current level and DROP will
lower the Feed Rate to Zero.
NOTE:
FAIL OPERATION is the final parameter to
check/change before exiting the Engineering Mode.
C) TO EXIT THE ENGINEERING MODE
1) Press
ESC
(Escape).
2) After pressing Escape, you will be asked if you would
like to
ENTER NEW ENG PWD
(Enter a new Engineering
Password?).
3) Press
NO
to keep the existing password and to return to
the Main Operating Screen.
4) Press
YES
to change the password. The TOP LINE of
the display will read:
NEW ENG PW 0 ? ? ?
a) Press the
UP
or
DOWN
keypad button(s) repeatedly
until the preferred FIRST digit is displayed. Then
press
NEXT
to accept the new value.
b) The number 0 will appear as the second digit. Once
again, use
UP
or
DOWN
to scroll to the preferred
number. Then press
NEXT
to accept and continue to
the third digit.
c) Repeat the same steps to select the third and fourth digit.
d) Finally, press
ENT
(Enter) to accept the New
Password and return to the Main Operating Screen.
NOTE:
At this time, if any changes to the settings were made
while in the Engineering Mode, you will be asked if you
want to
SAVE CHANGES?
Press
YES
or
NO
accordingly
and you will return to the Main Operating Screen.
IMPORTANT: Once all Engineering parameter settings
have been confirmed, proceed directly to the next section
(5.0 CONFIGURATION MODE) to check and/or change the
Configuration parameter settings.
The Configuration Mode is used to set the basic valve
parameters. Each parameter MUST be checked and/or
changed prior to placing the system into operation. Simply
enter the configuration mode as explained below and the para-
meters will be displayed individually in the order they are listed.
The list includes a detailed description of each parameter
along with the settings and control schemes that apply.
A) TO ENTER THE CONFIGURATION MODE
1) Press and hold the far right (
#4
) keypad button for
approximately five seconds and you will be asked to
enter the Configuration Password. The TOP LINE of the
screen will read:
ENTER CFG PW 0 * * *
.
2) Press the
NEXT
keypad button three times until the
factory default password (
0 0 0 0
) is displayed.
3) Press
ENT
(Enter) and the first Configuration Parameter
(
FLOW UNITS
) will appear.
NOTE:
See page 10 for Configuration Parameters.
9
5.0 CONFIGURATION MODE