Manual

40
Operation
AC output control
a. When the measured liquid level falls below the B setpoint, if the
AC output is configured for AUTO operation, an auto-fill cycle
will initiate and the respective AC output will be energized.
b. When the measured liquid level reaches or exceeds the A
setpoint, if the AC output is configured for AUTO operation, the
auto-fill cycle will terminate and the AC output will be de-
energized.
Note
The A setpoint must always be above the B setpoint for a given
channel. The firmware does not allow these setpoints to be reversed.
Both setpoints may be set from 0% to 100% as long as A > B.
Note
Do not confuse the A and B setpoints with the sensor inputs also
labeled A and B.
4.1.6 Select the Controller Mode
Review the available controller modes of the Model 286 as introduced in
paragraph 1.5 on page 7. The controller mode is selected by pressing the
key and using the key to cycle through the options.
If the normal mode is selected, then the AC outputs are assigned
independent auto-fill functions for Channels 1 and 2. The respective FILL
menu for each channel will provide AC output controls for each fill valve.
If the auto-changeover or pre-cool modes are selected, then the AC outputs
are both assigned to Channel 1. Channel 2 becomes unavailable. In this
case, the FILL menu for Channel 1 provides menus for controlling both AC
outputs.
4.1.6.1 AC output control
The operation of the AC output receptacles of the instrument is
controlled by the fill menu settings. Operation of the fill menu
selections is as follows unless otherwise noted:
a. OFF: With the instrument power on and with OFF selected in
the FILL menu, the instrument serves as only a level monitor,
giving a level reading on the digital display and providing data
via any analog or communication options installed. All setpoint
LEDs (and associated J5A or J5B alarm contacts) operate
normally, however, the associated AC output for the channel on
the rear panel will always be de-energized.