C.B.S. Scientific EPS-3000P-IIV - Manual (Page 9)

9 EPS-3000P-II(V) Manual Revision 2/10/14
Volt-Hour Operations
It is possible to enter an amount of volt-hours for the power supply to provide power, after which it
will automatically shut off. Volt-hours is the integration of voltage over time. Use volt-hour control to
provide consistency between runs.
Set up a constant mode setpoint and limits as described above. Enter a volt-hour duration of 0 9999
volt-hours. A volt-hour duration of zero effectively disables volt-hour run mode.
During a run, the volt-hour value displays the accumulated volt-hour value for the run.
Automatic Power-fail Restart
Automatic power-fail restart capability allows a timed or volt-hour run which is interrupted by loss of AC
power to be restarted automatically, so that the total time/volt-hour programmed for the run will be met.
NOTE: Loss of AC power includes switching off the unit using the power switch located at the rear of
the unit. When performing timed or volt-hour runs with power-fail restart enabled, always use the front
panel controls to stop a run in progress.
To enable power-fail restart, press the top function key when in the mode selection screen (MANUAL
or PROGRAM). The state of power-fail restart will toggle from off to on or on to off with each keypress.
When AC power is restored during a run in which power-fail restart is enabled, the display will show
“POWER-FAIL RESTART” for approximately 10 seconds indicating power-fail restart pending. During
this time the output is not energized, to allow safely stopping the run (by pressing Run). After the
power-fail restart pending delay is completed, the power supply output will ramp up to the setpoint
value and the run will continue from that point. Any number of power interruptions can occur during the
completion of a single run.
If a power-fail restart occurs during the running of a program the EPS-3000P-II(V) will complete
the interrupted step, and then advance to the next step in the program.
Programming
The EPS-3000P-II(V) can store 9 programs, each containing 9 steps. A program step is a constant
voltage, current, power, or temperature setpoint with any associated limit parameters, and most
importantly a time and/or volt-hour setting. When running a program step, after the time or volt-hour
limit is reached, the EPS-3000P-II(V) will automatically run the next program step (if there is one). After
all program steps are completed in a program the EPS-3000P-II(V) will shut down. Any sequence of
control mode and timed/volt-hour steps can be contained in a program. Note that a program step can
contain a zero for the time and volt-hour parameters, in which case the EPS-3000P-II(V) will continue to
maintain that setpoint indefinitely (just like the setting had been run from MANUAL mode).
To enter programming mode from an operating screen, cycle the control logic off and then back
on by pressing the gray ON/OFF key and selecting PROGRAM. The EPS-3000P-II(V) will display
the program screen, which shows the number of steps contained in the selected program. Use the
function keys to the right of the display to move through the 9 possible programs. To run the program
starting from step 1, press the Run key. To edit a program (including adding a first step to an empty
program) press the function key labeled EDIT. The EPS-3000P-II(V) will display the step screen,
which shows the parameters for the selected step (except when the program is empty in which case
the EPS-3000P-II(V) automatically starts entering the first step as follows). Use the function keys
to the right of the display to move through the 9 possible steps. To run the program starting from
the selected step, press the Run key. To edit a step press the function key labeled EDIT. The EPS-
3000P-II(V) displays the mode selection screen. Select a constant mode of operation by pressing the
appropriate function key located to the right of the display. To switch between volts/current/power and
time/volt-hours/temperature, press function key F1. To change a parameter, press the function key
located to the right of the display, next to the parameter you wish to change. The EPS-3000P-II(V)
will allow a new value to be entered using the keypad numeric keys. Press the function key labeled
“Enter” to complete the new setting. Press Clear to erase previous keystrokes. Press Exit to cancel