KEPCO KLP Series Quick Start Guide, P/N 228-1773 - Manual (Page 10)

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228-1773 REV 1 091713
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
http://www.kepcopower.com email: [email protected]
LAST SETTING RECALL. KLP is capable of saving the last setpoint values for voltage and current
prior to unit shutdown, and recalling them when the unit is next turned on. Enable this function prior to
power-up by setting Analog I/O Switch 3 to the ON (down) position (see Figure 2). Upon next power-up,
each setpoint entry for voltage and current is stored in non-volatile memory, with latest settings displac-
ing prior ones. When the power supply is turned off, the last settings are saved and automatically
retrieved at next power-up as the starting setpoints.
• Recall is for SETPOINT ADJUSTMENTS only; output changes entered as REALTIME ADJUSTMENTS
are not saved.
• To disable this function, turn the unit off and set Analog I/O Switch 3 to the OFF (up) position. At next
power-up, the stored value buffer is cleared and setpoints will default to zero volts and minimum cur-
rent.
• If the virtual model for the power supply is altered, the last settings are reset to zero volts and minimum
current.
VIEWING/CHANGING OVERVOLTAGE OR OVERCURRENT PROTECTION VALUES.
Overvoltage and Overcurrent protection values can be individually programmed. The range for overvolt-
age and overcurrent values are 0.2 to 1.2 x E
O
max and 0.72 to 1.2 x I
O
max.
If the output voltage/current exceeds the overvoltage/overcurrent protection value, the protection circuit
latches the output off, flashes an overvoltage (OVP) or overcurrent (OCP) protection error message on
the status display and sets a status bit that can be retrieved through the RS 232, GPIB or LAN port. The
unit must be cycled on and off to restore the output.
• The maximum values are 1.2 x E
O
max for overvoltage protection (OVP), and 1.2 x I
O
max for overcur-
rent protection (OCP).
• A built-in feature prevents the unit from being programmed within 20% of OVP or 20% of OCP (or the
minimum OCP which is 72% of I
O
max). For example, if OVP and OCP are set to 12V and 72A, respec-
tively, programming of the output is automatically limited to 10V and 60A.
• When a virtual model is defined, OVP and OCP are automatically set 20% and 20%, respectively,
above the maximum programmable values established by the virtual model. If OVP or OCP are low-
ered by the user, valid settings will actually be lower than the virtual model limits because values within
20% of OVP or 20% of OCP are prohibited.
• If either adjustment exceeds maximum programmable volts or amps, or if the adjustment is within 20%
of OVP or 20% of OCP, the status display will show >MAX.
1 Using a thin tool (e.g., end of paper clip), press and hold the PROTECT switch. The output is
switched off, setting voltage to zero Volts, and current to a minimal value, and the status display
shows PROT. The DC VOLTS and DC AMPERES displays show the corresponding overvoltage and
overcurrent protection setpoints while the PROTECT switch is held in.
2 To change the values, operate the corresponding adjustment control while holding the PROTECT
switch in. When the PROTECT switch is released, the protection values showing in the DC VOLTS
and DC AMPERES displays are entered as the new protection values.