KEPCO BHK-MG 200W (Full Rack) Series - Manual (Page 54)

3-10
BHK-MG (OPR) 022014
The value for overvoltage protection can be set within the range of 0 to 1.1 x E
O
max; overcur-
rent can be set within the range of 0 to 1.1 x I
O
max. The factory default values are 1.1 x E
O
max
for overvoltage protection and 1.1 x I
O
max for overcurrent protection.
NOTE: Although the LCD can display up to five decimal places, only two decimal places are
actually used for voltage and current settings (except that only one decimal place is
used for setting voltage on Models BHK 1000-0.2MG and BHK 2000-0.1MG, and three
decimal places are used for setting current on all models when current scale is set to
Low range.).
3.2.12 CHANGING MAXIMUM VOLTAGE OR CURRENT VALUE
The default maximum values of voltage and current are determined by the model, e.g., 500V
and 400mA for the BHK 500-0.4MG. These values can be lowered by the user to prevent inad-
vertent damage to a specific circuit under test by establishing software limits through the use of
the MENU key. Lowering the maximum values of the BHK 500-0.4MG to 100V and 200mA,
effectively makes the unit a 100V/200mA power supply.
Maximum values for current are independent for Low Range and High Range (see PAR.
3.2.10). With the power supply in command entry status
(:_:_:)
, press MENU key until the
LCD reads
New MAXIMUM Vset
(or
Iset) (=_=_=) n.n
where n.n is the maximum value
setting to be changed (V for voltage, mA for current). Press CLEAR to exit menu without chang-
ing setting. Press ENTER to validate displayed value or press number keys to enter new value
and press ENTER to accept new setting (the
key erases data just entered), or CLEAR to exit
without changing setting.
NOTE: Although the LCD can display up to five decimal places, only two decimal places are
actually used for voltage and current settings (except that only one decimal place is
used for setting voltage on Models BHK 1000-0.2MG and BHK 2000-0.1MG, and three
decimal places are used for setting current on all models when current scale is set to
Low range.).
If a value is entered that is higher than the rated maximum for the power supply, the bottom line
of the LCD flashes
Vset
or
Iset MAX =
where E
O
max or I
O
max is the
rated maximum of the power supply. The unit remains in data entry status
(=_=_=)
waiting for
a value equal to or less than the maximum value. Press CLEAR to exit without changing the
value.
Once the maximum value has been changed, if a value higher than the new maximum is
attempted to be programmed, the LCD flashes
Vset
(or
Iset
)
MAX = n.n
where n.n is the
programmed maximum (V for voltage, mA for current).
NOTE: If the programmed output value is higher than the new maximum value established
with the MENU key, the output will be automatically limited to the new maximum value.
3.2.13 STORING POWER SUPPLY OUTPUT SETTINGS
The programmed settings of voltage, current, overvoltage protection and overcurrent protection
can be stored in one of the 40 memory locations available for local programming (see PAR.
3.2.16). To accommodate the two current scales, there are actually 40 locations for High range