GW Instek PSS-Series User Manual - Manual (Page 10)

PSS-3203/2005 PROGRAMMABLE POWER SUPPLY
USER MANUAL
⎯ 14 ⎯
6. MAINTENANCE
The following instructions are executed by qualified personnel only.
To avoid electrical shock, do no perform any servicing other than the
operating instructions unless you are qualified to do so.
6-1.Fuse Replacement
If the fuse blows, the display will not light and the power supply will
not operate. The fuse should not normally open unless a problem has
developed in the unit. Try to determine and correct the cause of the
blown fuse, then replace only with a fuse of the correct rating and
type (refer to 3-2 of page 5). The fuse is located on the rear panel
(see Fig.4-2).
WARNING. For continued fire protection. Replace fuse
only with 250V fuse of the specific type and rating, and
disconnect power cord before replacing fuse.
6-2. Line Voltage Conversion
The primary winding of the power transformer is tapped to permit
operation from 100, 120, 220, or 230VAC, 50/60 Hz line voltage.
Conversion from one line voltage to another is done by change
AC selects switch.
The rear panel identifies the line voltage to which the unit was
factory set. To convert to a different line voltage, perform the
following procedure:
WARNING
PSS-3203/2005 PROGRAMMABLE POWER SUPPLY
USER MANUAL
⎯ 15 ⎯
(1) Make sure the power cord is unplugged.
(2) Ch ang e th e AC selects switch to the d esired lin e voltage
position.
(3) A change in line voltage may also require a corresponding
change of fuse value. Install the correct fuse value as listed on
rear panel.
6-3. ADJUSTMENT AND CALIBRATION
--Preparation
(1) 30 minutes warm up before calibration.
(2) Ambient temperature:23±5°C, Humidity: Under PH80%.
--Output Calibration Steps:
[Step 1]
Press [LOCAL] for 4 to 5 seconds interruptedly to appear Password
input window (vary with different models: PSS-3203: 3203, PSS-
2005: 2005), input the password number with the wheel knob, and
use the F/C button to shift the input position at the same time, then
press [ENTER]. When the password number has been input by
mistake, the system will jump out of the present mode.
[Step 2] Voltage Calibration Step
After getting into Calibration selection window, select Voltage
calibration with the knob and press [ENTER].