KEPCO KLR Series Quick Start Guide - Manual (Page 9)

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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]
SETTING VOLTAGE OR CURRENT. The VOLTAGE and CURRENT controls adjust output voltage
and current limit, respectively, when the unit is in constant voltage (CV) mode and adjust voltage limit
and output current, respectively, when the unit is in constant current (CC) mode. The mode (CV or CC) is
determined by the load together with the programmed settings. As long as the voltage across the load
produces a current that is less than the programmed Current setpoint, the unit operates in CV mode
(voltage programmed to voltage setpoint, current limited by current setpoint). If the load changes to the
point that current through the load reaches the current setpoint, the unit automatically enters CC mode
(current programmed to current setpoint, voltage limited by voltage setpoint).
Output voltage or current can be set at the front panel in two ways: Real-time adjustment or Setpoint
adjustment.
Real-time Voltage/Current Adjustment. Rotating the associated control will change the output voltage
or current in real-time only if the output is enabled. If the unit is in constant voltage mode (CV indicator lit)
the DC VOLTS display shows the actual output voltage as the VOLTAGE control is rotated. Similarly, if
the unit is in constant current mode (CC indicator lit) the DC AMPERES display shows the actual output
current as the CURRENT control is rotated.
• If the unit is in CV mode, rotating the CURRENT control will affect the current limit even though the DC
AMPERES display does not change since it is showing actual output current. Similarly, rotating the
VOLTAGE control while in CC mode affects the voltage limit. To change the limits to a precise value,
refer to SETPOINT ADJUSTMENT.
• Voltage and current settings are not allowed to exceed either a) the limit model setting or b) 80% of the
protection value. Attempts to set voltage or current beyond these limits will not be accepted. The status
display shows either >MAX for limit model, >OVP for voltage protection, or >OCP for current protection
to indicate which limit is being exceeded.
Setpoint Voltage/Current Adjustment.
1 Tap either the VOLTAGE or CURRENT control to initiate setpoint adjustment (status display reads
SET ). The previous setpoint is visible on the corresponding DC VOLTS or DC AMPERES display.
2 Rotate the corresponding control to change the setpoint as viewed on the corresponding LED dis-
play. Tap the adjustment control again to accept the new setting.
• In the setpoint mode, both coarse and fine adjustment (depending on whether the control is pressed in
while rotating) is available. The coarse adjustment is approximately 100X the fine adjustment resolu-
tion. Refer to User Manual to set coarse/fine preference.
• Setpoint adjust can be done with output either on or off, however the output can not be enabled while
setpoint is active.
• Voltage and current settings are not allowed to exceed either a) the limit model setting or b) 80% of the
protection value. Attempts to set voltage or current beyond these limits will not be accepted. The status
display shows either
>MAX for limit model, >OVP for voltage protection, or >OCP for current protection to
indicate which limit is being exceeded.
• If you decide not to change the value after rotating the control, the previous setpoint value will be
restored after about 20 seconds of inactivity. Then tap either adjustment control to accept.