CHART TRIFECTA 2K, Руководство по обслуживанию

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Trifecta 2K
The Set-up Menu can be obtained by pressing the “menu” key on the keypad
3
(Note: If the
system is in a fill mode, the menu is inaccessible). After pressing the “menu” key, the LCD
display will prompt you to “Press F1 for Values.” Repeatedly pressing the “F1” key will toggle
through the list of values. In addition to the changeable values shown in T
ABLE
1, it also
displays the readings of the pressure and differential pressure transmitters. This may be useful
in troubleshooting as you can verify the transmitters are reading the same as the analog gauges
on the tanks.
When you press the “F1” key and one of the changeable parameters from the above table is
displayed, the value can be changed by pressing the “
▲
” (up) and “
▼
” (down) keys on the
keypad. When the value has changed to the desired value, pressing “F1” will bring you to the
next value. When all values are satisfactory, pressing the “menu” key will exit the Set-up Menu
and return the system to operation based on the new values.
If the system is turned off, all of the parameters are stored in memory. When the system is
turned back on, the controller will resume operation based on the most current values. The
values will not need to be re-configured each time it is turned on.
Typical Operating Cycle
✧
Tank #1 in use (gas use valve is open and pressure building valve open on demand to
maintain pressure), Tank #2 is on standby, full of product, and pressure building valve
opens on demand to maintain pressure at set point.
✧
Tank #1 liquid level drops to 18% of full volume. After a short time delay, tank #1
switches to the fill mode and tank #2 switches to the gas delivery mode.
✧
The cycle is repeated thereafter.
Fill Mode
The following is a typical fill cycle, where the cylinder automatically fills and repressurizes,
and ready to be switched into the gas delivery mode:
✧
Upon reaching 18% of full volume, the gas use valve closes and the vent valve opens to
reduce the pressure in the cylinder to approximately 20 psig (1.5 bar) less than the
pressure in the bulk tank. Depending upon the setting of the “Bulk Tank Critical”, the
cylinder may vent directly into the bulk tank, or to the atmosphere.
✧
When the pressure drops to less than the bulk tank pressure, the liquid fill process
begins. The cylinder is top filled and maintains a low pressure to complete the fill.
✧
When the liquid level reaches 32 Inches (81.3 cm) H
2
O, the pressure building solenoid
opens to build pressure to the set point. The pressure in the cylinder increases above the
bulk tank pressure and terminates the transfer of liquid (the check valves prevent back
flow into the bulk tank).
3
“Menu” key is disabled during the filling of a Laser-Cyl.
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