KEPCO MBT Series - Manual (Page 53)

MBTSVC111609
3-15
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If the power supply was operating in a remote configuration, and the slew keys will be used to
locally adjust voltage/voltage limit, it is advisable to press SHIFT and Vadj to ensure that the
power supply has been commanded to operate in Voltage mode. If the power supply was com-
manded to operate in current mode before being set into Local mode, the slew keys will have no
effect on output voltage or voltage limit.
Pressing the key increases the output voltage/voltage limit (see Table 3-5) by the slew key V
range value which was previously set using the MENU (see PAR. 3.2.2). For example, if the out-
put voltage is 25.6V (Voltage mode, output enabled), and the slew key V range value is 0.10V,
pressing the key twice changes the output voltage to 25.8V. The key operates similarly to
decrease output voltage by the slew key V range value.
3.2.1.6.5 SLEW ( AND ) KEYS — MR, MGR MODELS
As described in PAR. 3.2.1.6.2 (MR, MGR Models) for the Vadj and numeric keys, the effect of
the slew keys is dependent upon model, commanded mode, output enabled/disabled, actual
mode, and the load.
Table 3-6 (MR, MGR Models) summarizes the effect of the slew key adjustments for different
conditions. The first three columns reflect the status of the unit before the slew key is pressed.
The fourth column shows how the adjustment will affect the status of the power supply. Refer to
PAR.s 3.1.1 and 3.1.2 for more details regarding commanded and actual mode of operation
(either voltage or current).
TABLE 3-5. USING SLEW KEYS ( AND ) TO SET OUTPUT
VOLTAGE/VOLTAGE LIMIT — MODELS M, MG
POWER SUPPLY STATUS BEFORE SLEW KEY PRESSED
SLEW KEYS
ADJUST: COMMANDED
MODE
OUTPUT ENABLED/
DISABLED
ACTUAL MODE ***
(DICTATED BY LOAD)
VOLTAGE DISABLED VOLTAGE***** Programmed output voltage
VOLTAGE ENABLED VOLTAGE Actual output voltage
VOLTAGE ENABLED CURRENT**** Actual Voltage limit **
CURRENT * Either DISABLED
or ENABLED Either VOLTAGE
or CURRENT No effect on voltage. (Refer to table
3-9 for effect on current/current limit.)
* If the unit was programmed to Current mode remotely before being set to Local Mode, the unit will stay in com-
manded current mode until a Voltage Mode command is received.
** Overload” error message placed in error buffer (for use when operating in Remote mode).
*** Actual mode is indicated by the VOLTAGE MODE and CURRENT MODE status LED’s.
**** Condition where load forces power supply mode.
***** Forced internally by power supply.