Good Will Instrument PSH-10100 User Manual - page 15
PSH SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
24
[ENTER]. During the value input, use [F/C] key to switch over the
integral or dismal number input.
[Step 3.3]
Input measured voltage value (Min) with the knob and press
[ENTER]. During the value input, use [F/C] key to switch over the
integral or dismal number input.
[Step 4]
Unplug the test lead, switch to the window of OVP calibration item
with the knob, press [ENTER] to start automatically OVP calibration
item
[Step 4.1]
Now, the window will display the calibration progress. After the
calibration is finished, the system will jump out the window.
[Step 5]
After make sure all the calibration procedure is completed and
correct, switch the window to Save and press [ENTER] key to finish
the calibration procedure.
[Step 6]
If it is not necessary to store the calibration data, just switch to
EXIT with the knob and press [ENTER] to leave the calibration
window.
6-2. Cleaning
To clean the power supply, use a soft cloth dampened in a solution
of mild detergent and water. Do not spray cleaner directly onto the
instrument, since it may leak into the cabinet and cause damage. Do
not use chemicals containing benzine, benzene, toluene, xylene,
acetone, or similar solvents. Do not use abrasiv e cleaners on any
portion of the instrument.
PSH SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
25
7. THE SYSTEM DIAGRAM AND DESCRIPTION
7-1. Block Diagram
AC
Input
Power Factor
Corrector
Power
Stage
Voltage
Control
Circuit
Current
Control
Circuit
D To A
Converter
Reference
Analog
Switch
and Sample
Hold
Micro
Control
LCM
Display
Keyboard
Auxiliary
Power
Post
Regulator
Or
Gate
O/P
Interface
RS-232 or GPIB
Driver
Circuit
Pulse Width
Modulator
Error
Amplifier
Opto-
Isolator
+ 15V
-15V
+5V1
Unit 2
Unit 3
Unit 1