beautypg.com

GW Instek PSS-Series User Manual User Manual

Page 10

background image

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].