GW Instek PSP Series User Manual
Page 9
PSP SERIES
USER MANUAL
12
5. Functional Description of Operating Elements
With its continuously adjustable voltage and current settings, this
power supply can be used universally in school, work, hobby, and other
applications. An electronic current limiter protects the power supply from
overload and short-circuits at its output; a fan controlled by a temperature
circuit protects the power supply (its electronics) from thermal overload.
During such an overload (short circuit or overload) the output is
regulated down, i.e. the voltage is reduced. Only when the short-circuit
has been remedied is the output released.
The set values can be read via the illuminated multiple-line LCD
display. The voltage, current or power setting is adjusted by means of an
encoder wheel in 10mV, 20mV, 1mA, 2mA, 10mA and 1 W steps
respectively. Therefore the exact adjustment of the output voltage and the
current limit and maximum output power is possible. However, observe
the safety hints without fail.
PSP SERIES
USER MANUAL
13
6. Operating Instructions with keypad input
A) Basic setting
a) Connect the AC power cable to the AC power socket and ensure
that it is firmly seated. Then plug the earthed power plug into an
earthed AC power socket.
Attention: The continuity of the safety earth wire must be
unbroken within the instrument, within the AC power
cable and within the AC power socket otherwise life will
be endangered.
b) Press the AC power On/Off switch
Attention: The earth connector in the front of the
instrument and the RS-232 interface connector earth are
connected directly with the earthing wire of the AC power
input socket and of the connected AC power socket.
Before operating the instrument each time, first check and
ensure that the 4 mm sockets of the instrument is well fit of
no damage.
B)
Setting the lim
i
ts
The voltage, current and power output values are each limited to a
maximum. This upper limit can be varied downwards. Setting the limits
is carried out using the “V LIMIT” “I LIMIT” “P LIMIT” keys as
follows:
V LIMIT Voltage limit
Press the "V LIMIT" key in the "LIMITS" field until
the symbol "U-const" flashes. The voltage limit can now
be adjusted to 1V steps by using the encoder wheel. If