Good Will Instrument PSH-1036 User manual

Declaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
No. 95-11, Pao-Chung Rd., Hsin-Tien City, Taipei Hsien, Taiwan
declares that the below mentioned product
PSH-1036/2018/3610/6006
PSH-1070/2035/3620/6012
PSH-10100/2050/3630/6018
are herewith confirmed to comply with the requirements set out in the Council Directive on
the Approximation of the Law of Member States relating to Electromagnetic Compatibility
(89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Equipment Directive
(73/23/EEC). For the evaluation regarding the Electromagnetic Compatibility and Low
Voltage Equipment Directive, the following standards were applied:
◎EMC
EN 61326-1:Electrical equipment for measurement, control and laboratory use –– EMC
requirements(1997+A1: 1998)
Conducted and Radiated Emissions
EN 55011: 1991+A1: 1997+A2: 1996 ElectrostaticDischarge EN61000-4-2:1995
CurrentHarmonic
EN 61000-3-2: 1995+A1: 1998+A2: 1998 +A14: 2000 RadiatedImmunity EN 61000-4-3:1996
Voltage Fluctuation
EN 61000-3-3: 1995 Electrical Fast Transients
EN 61000-4-4:1995
------------------------- Surge Immunity
EN 61000-4-5:1995
------------------------- Conducted Susceptibility
EN 61000-4-6:1996
------------------------- Voltage Dips/ Interrupts
EN 61000-4-11: 1994
◎Safety
Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC
EN 61010-1: 1993+A2: 1995
IEC61010-1:1990+A2:1995
USA : UL 3111-1–First Edition, June 1994
Canada:CSA-C22.2 No. 1010.1-92
PSH SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
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CONTENTS PAGE
1.
PRODUCT INTRODUCTION.................................................
1-1. Description………………………………………………
1-
2. Features……………………………………………….…
1
1
1
2. TECHNICAL SPECIFICATIONS…………………………
3
3. PRECAUTIONSBEFOREOPERATION…….…………...
3-1. Unpacking the Instrument……………….………….….
3-2. Checking the Line Voltage…………………..………….
3-3. Environment……………………………………..……...
6
6
6
7
4. PANEL INTRODUCTION……………………..…………...
8
5. OPERATION METHOD………………………………...….
5-1. Constant Voltage/Constant Current Crossover
Characteristic.......................................................................
5-2. Output Voltage/Current Setting…………………..……
5-3. Over Voltage/Current Protection Setting……………...
5-4. Display Contrast Setting…….…………………………..
5-5. Buzzer Setting…………………………………………...
5-6. GPIB/RS-232 Interface Setting…………………………
5-7. Remote Error Sensing…………………………………..
5-8. Test Lead Selective Table……………………………….
13
13
14
16
16
16
16
17
19
6. MAINTENANCE………………………..…………………..
6-1. Adjustment and Calibration……………………………
6-2. Cleaning…………………………………………………
20
20
23
7. THE SYSTEM DIAGRAM AND DESCRIPTION………..
7-1.Block Diagram…………………………………………...
7-2.The Configuration of PSH-series Block System…….….
24
24
25

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SAFETY TERMS AND SYMBOLS
These terms may appear in this manual or on the product:
WARNING. Warning statements identify condition or
practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or
practices that could result in damage to this product or
other property.
The following symbols may appear in this manual or on the product:
DANGER ATTENTION Protective Earth(ground) FrameorChassis
High Voltage refer to Manual Conductor Terminal Terminal
Terminal
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FOR UNITED KINGDOM ONLY
NOTE: This lead/appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with
the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in main leads may not correspond with the
colours marking identified in your plug/appliance, proceed asfollows:
The wire which is coloured Green & Yellow must be connected to the
Earth terminal marked with the letter E or by the earth symbol
or coloured Green or Green & Yellow.
The wire which is coloured Blue must be connectedto the terminal
which is marked with the letter N or coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal
marked with the letter L or P or coloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or
contact the supplier.

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This cable/appliance should be protected by a suitably rated and
approved HBC mains fuse: refer to the rating information on the
equipment and/or user instructions for details. As a guide, cable of
0.75mm2should be protected by a 3A or 5A fuse. Larger conductors
would normally require 13A types, depending on the connection
method used.
Any moulded mains connector that requires removal /replacement
must be destroyed by removal of any fuse & fuse carrier and disposed
of immediately, as a plug with bared wires is hazardous if a engaged
in live socket. Any re-wiring must be carried out in accordance with
the information detailed on this label.
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1. PRODUCT INTRODUCTION
1-1. Description
PSH-series Programmable Power Supply is controlled by Micro
Processor Unit (MPU) that can easily connect communication interface
RS-232 or GPIB to computer in order to satisfy user’s demands for
auto-testing and auto-control. The series of products have improved
greatly the shortage of the traditional big size, heavy weight products.
The voltage and current are completely controlled by 12 bits D/A
Converter with higher resolution and accuracy. Also, the digitalization of
system makes a speedy, precise and convenient input of information
controlled by the keyboard and rotation knobs.
The adjustment of voltage/current is made by software calibration
without manual error that will increase the preciseness of the instrument.
The function of Over Voltage Protection (OVP) and Over Current
Protection (OCP) is set with software and detected with hardware to
achieve protected function precisely and speedily in order to prevent
users from danger by using the instrument.
1-2. Features
1) Wide Input Voltage Range and High Power Factor (P.F).
2) High Efficient.
3) Constant Voltage and Constant Current Operation.
4) The protection for Over Voltage, Over Current and Over Heat.

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5) IEEE-488.2 and SCPI Compatible Command set.
6) Remote Control.
7) Output On/Off Control.
8) Self-test and Software Calibration
9) LCDDisplay
10) Built-in Buzzer Alarm.
11) Select either RS-232C(standard) or GPIB(option).
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2. TECHNICAL SPECIFICATIONS
10V PSH-1036(36A)
PSH-1070(70A)
PSH -10100(100A)
20V PSH-2018(18A)
PSH-2035(35A)
PSH -2050(50A)
36V PSH-3610(10A)
PSH-3620(20A)
PSH -3630(30A)
MODEL
SPEC.
60V PSH-6006(6A)
PSH-6012(12A)
PSH -6018(18A)
Load ≦0.1%+5mV
≦0.1%+5mV
≦0.1%+5mVRegulation
(C.V) Line ≦0.05%+5mV
≦0.05%+5mV
≦0.05%+5mV
Load ≦0.2%+5mA
≦0.2%+10mA
≦0.2%+15mA
Regulation
(C.C) Line ≦0.2%+5mA
≦0.2%+10mA
≦0.2%+15mA
Voltage(mVrms)
≦10mVrms,100mVpp 20Hz~20MHz
Ripple &Noise
Current(mArms)
≦0.2% ≦0.2%+20mA
≦0.2%+40mA
≤36V
≦0.05%+25mV
Voltage
>36V
≦0.05%+50mV
10V ≦0.2%+30mA
≦0.2%+60mA
≦0.2%+90mA
20V ≦0.2%+30mA
≦0.2%+30mA
≦0.2%+60mA
36V ≦0.2%+30mA
≦0.2%+30mA
≦0.2%+30mA
Program
Accuracy Current
60V≦0.2%+30mA
≦0.2%+30mA
≦0.2%+30mA
≤36V
10mV
Voltage
>36V
20mV
10V 10mA 20mA 30mA
20V 10mA 10mA 20mA
36V 10mA 10mA 10mA
Program
Resolution Current
60V 10mA 10mA 10mA

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10V PSH -1036(36A)
PSH-1070(70A)
PSH -10100(100A)
20V PSH -2018(18A)
PSH-2035(35A)
PSH -2050(50A)
36V PSH -3610(10A)
PSH-3620(20A)
PSH -3630(30A)
MODEL
SPEC.
60V PSH -6006(6A)
PSH-6012(12A)
PSH -6018(18A)
≤36V
≦0.05%+25mV
Voltage
>36V
≦0.05%+50mV
10V ≦0.2%+30mA
≦0.2%+60mA ≦0.2%+90mA
20V ≦0.2%+30mA
≦0.2%+30mA ≦0.2%+60mA
36V ≦0.2%+30mA
≦0.2%+30mA ≦0.2%+30mA
Readback(Meter)
Accuracy Current
60V ≦0.2%+30mA
≦0.2%+30mA ≦0.2%+30mA
≤36V
10mV
Voltage
>36V
20mV
10V
10mA 20mA 30mA
20V
10mA 10mA 20mA
36V
10mA 10mA 10mA
Readback(Meter)
Resolution Current
60V
10mA10mA 10mA
Recovery Time
(50% step load
change from
25%~75%)
CVMode ≦2ms
Voltage Up
(10%~90% ≦
95% rating load)
≤150ms ≤150ms ≤150ms
Response Time
Voltage Down
(90%~10%, ≧
10% rating load)
≤150ms ≤150ms ≤150ms
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10V PSH-1036(36A)
PSH-1070(70A)
PSH -10100(100A)
20V PSH-2018(18A)
PSH-2035(35A)
PSH -2050(50A)
36V PSH-3610(10A)
PSH-3620(20A)
PSH -3630(30A)
MODEL
SPEC. 60V PSH-6006(6A)
PSH-6012(12A)
PSH -6018(18A)
Temperature
Coefficient Voltage (25±5℃)≤100ppm/°C
≤100ppm/°C
≤100ppm/°C
OVP/OCP/OHP
provided provided provided
Protection
Rush Current
Protection Provided provided provided
Output ON/OFF
Control provided provided provided
Display LCD LCD LCD LCD
Dimensions
(W×H×D) 108×141×388
m/m 188×141×388 m/m 268×141×388 m/m
Mechanical
Spec. WeightApprox. 3.3 kg
Approx. 6.2 kg
Approx. 9.3 kg
AC Input 100-230V 100-230V 100-230V 100-230V
Operation
Environmental
Indoor use
Altitude up to 2000 m
Ambient temperature :
To satisfy specifications : 10℃to 35℃( 50°F to 95°F )
Maximum operating ranges: 0℃to 40℃( 32°F to 104°F )
Relative humidity: 85% RH(max.) non condensing
Installation Category : II
Pollution degree 2
Storage
Temperature &
Humidity -10°to 70℃, 70%RH (maximum)
Accessories Instruction manual…………… 1 Cable Gland………………….. 1
AC Input Cover……………… 1

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3.PRECAUTIONS BEFORE OPERATION
3-1.Unpacking the Instrument
The product has been fully inspected and tested before shipping from the
factory. Upon receiving the instrument, please unpack and inspect it to
check if there is any damage caused during transportation. If any sign of
damage is found, notify the bearer and/or the dealer immediately.
3-2.Checking the Line Voltage
The product can be applied to 100V~230VAC voltages shown in the table
below.
WARNING. To avoid electrical shock the power cord protective
grounding conductor must be connected to ground.
AVERISS: Pour éviter les chocs électriques, le fil de terre
du cordon secteur doit impérativement êtrerelié à la terre.
Replace the required fuses according to the table below:
Model AC Input AC Input Range
Fuse
PSH -1036(36A)
PSH -2018(18A)
PSH -3610(10A)
PSH -6006(6A)
100~230VAC
90~250VAC 6.3A/250VAC
PSH -1070(70A)
PSH -2035(35A)
PSH -3620(20A)
PSH -6012(12A)
100~230VAC
90~250VAC 6.3A/250VAC×2
0.5A/250VAC×1
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PSH-10100(100A)
PSH-2050(50A)
PSH-3630(30A)
PSH-6018(18A)
100~230VAC
90~250VAC 6.3A/250VAC×3
0.5A/250VAC×1
WARNING. To avoid personal injury, disconnect the power
cord before removing the fuse holder.
3-3.Environment
The normal ambient temperature range of this instrument is from 0°to 40°C
(32°to 104°F). To operate the instrument exceeding this specific
temperature range may cause damage to the circuits of instrument.
Do not use the instrument in a place where strong magnetic or electric field
exists as it may disturb the measurement.
CAUTION?To avoid damaging the instrument, do not use
itin a place where ambient temperature exceeds 40℃.
WARNING: This is a Class A product. In a domestic
environment this product may cause radio interference in
which case the user may be required to take adequate
measures.

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4.PANEL INTRODUCTION
1.
Display Indicate the setting of voltage/current v
alue,
output voltage/current value and the status of
setting and output.
2.
Power Switch
Connect the AC power, then press power
switch.
3.
Rotary Encoder Wheel knob.
4.
Output Turn on or off output by pressing the knob.
5.
Vset/Iset
(ENTER) Output vol
tage and Output current switched
setting.
[ENTER]: This key is for digit value input or
setting confirmation.
6.
F/C
Switch to wheel knob for coarse and fine
adjustment.
7.
MENU The selection menu for function setting.
PS. If there is no further setting
change after
switching to MENU 4~5 seconds, it will be
back to the previous window or output display
window.
8.
Local
(GPIB/RS-232) This key has two function: 1.
Clear the remote control and replace with
panel control setting.
2. Clear the protection status of power supply.
PS. Press and hold the key for 5 seconds to get
into calibration mode.
9.
Cooling Fan A cooling fan.
10.
GND Terminal Connect the ground terminal to chassis.
+Output Terminal Positive output terminal.11.
-Output Terminal Negative output terminal.
12.
S+
S-
M+
M-
: a positive input voltage remote sense terminal.
: a negative input voltage remote sense terminal.
: a positive output voltage monitoring Terminal.
: a negative output voltage monitoring terminal.
13.
Interface : GPIB or RS-232C communication interface.
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14.
AC Power Terminal
: AC power input terminal. The input is from 90
to 250Vac.
AC Input Cord
WARNING: The AC input cord is the disconnect device for
the power supply. The input cord must be no longer than
9.84 feet (3m). Be sure the AC input cord is well connected
according to Figure 1 and Figure 2 before operation.
The recommended AC input cord is specified in the table as follows. Add
a non-locking plug suitable for use in the country in which you are
operating.
Power
Supply
WireType Rating
Cable Outside
Diameter Cable Gland
(Strain Relief)
1 unit
2 units
SVT
3×18 AWG
stranded copper
60℃
min.
300V
5.84~6.73m/m
(0.230"~0.265")
KSS
PG-1610
3 units
SJT
3×14 AWG
stranded copper
60℃
min.
300V
9.143~10.03m/m
(0.360"~0.395")
KSS
PG-2013
1) Strip the outside insulation on the AC cable approximately 4"(10cm).
Trim the wires to make the ground wire is 0.5"(12mm) longer than
the other wires and join the toric terminals to each stripped wires
individually.
2) Unscrew the base of the strain relief from the helix-shaped body.
Insert the base through the outside opening in the AC input cover
and screw the locknut securely onto the base from the inside.
3) Insert the AC cable through the strain relief base until the outer cable
jacket is adjoined with the edge of the base. Tighten the body to the
base while holding the cable in place and the cable is fastened
securely inside the strain relief.
4) Connect the toric terminals to AC terminals of rear panel
individually.

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10 
5) Screw the AC input cover to the AC terminal on the rear panel
tightly.
Figure 1
Cable Gland(with Strain Relief)
ACInputCover
Figure 2
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lFront Panel
POWER
OUTPUT
7
5
6
8
F C
SETVSETI
ENTER
CV 10. 10V 36. 10 A
RMT
LOCAL
MENU
ADRS OUTOCP
3
4
2
1
R
PROGRAMMABLE
POWER SUPPLY
PSH-1036

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12 
lRear Panel
14
13
116525
L
AC L
C
C22.0 NO. 1010.1 CERTIFIED TO UL STD. UL 3111-1 CONFORMS TO
US
R
E
T
S
I
D
CSA STD.
LABEL
檢磁
12 MS S M
10
9
11
100 230 Vac
N
1550 VA 1450 W MAX
1080 VA 1010 W MAX
560 VA 520 W MAX
47 63 Hz
OUTPUT
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13 
5. OPERATION METHOD
The voltage and current unit applied for the instrument is Volt and
Ampere.
5-1. Constant Voltage/Constant Current Crossover Characteristic
The working characteristic of this series is called a constant
voltage/constant current automatic crossover type. This permits
continuous transition from constant current to constant voltage
modes in response to the load change. The intersection of constant
voltage and constant current modes is called the crossover point.
Fig.5-1 shows the relationship between this crossover point and the
load.
For example, if the load is such that the power supply is operating
in the constant voltage mode, a regulated output voltage is provided.
The output voltage remains constant as the load increases, up until
the point where the preset current limit is reached. At that point,
the output current becomes constant and the output voltage drop is
proportioned to further increases in load. The crossover point is
indicated by the front panel LCD display. The crossover point is
reached when the CV indicator transfer to CC indicator.

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Figure 5-1 Constant Voltage/Constant Current Characteristic
Similarly, crossover from the constant current to the constant voltage
mode automatically occurs from a decrease in load, a good example
of this would be seen when charging a 12 volt battery. Initially, the
open circuit voltage of the power supply may be preset for 13.8 volts.
A low battery will place a heavy load on the supply and it will
operate in the constant current mode, which may be adjusted for a 1
amp charging rate. As the battery becomes charged, and its voltage
approaches 13.8 volts, its load decreases to the point where it no
longer demands the full 1 amp charging rate. This is the crossover
point where the power supply goes into the constant voltage mode.
5-2. Output Voltage/Current Setting
At first, set to voltage/current setting window or output value
displayed window:
--Output Voltage Setting:
Switch the flashed cursor to voltage input position by pressing
[Vset/Iset] key, and modify the setting value by using the wheel
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knob. Now, use the [F/C] key to input the integral or dismal
number.
Example: Set voltage at 20.00V.
Switch the cursor to mV range by using the [F/C] key
and adjust the value to number 00 with the rotation knob,
then switch the cursor to V range by using the [F/C] key
and adjust the value to number 20 with the rotation knob
to complete the modification.
PS. At the moment, if the OUTPUT is on, the output voltage will
be output the corresponding voltage value immediately
following the adjustment of the rotation knob.
--Output Current Setting:
Switch the flashed cursor to current input position by pressing
[Vset/Iset] key, and modify the setting value by using the wheel
knob.
Now, use the [F/C] key to input the integral or dismal number.
Example: Set voltage at 18.00A.
Switch the cursor to mA range by using the [F/C] key
and adjust the value to number 00 with the rotation knob,
then switch the cursor to A range by using the [F/C] key
and adjust the value to number 18 with the rotation knob
to complete the modification.
PS. When the load current of output terminal exceeds the current
setting value, the instrument is operated under the Constant
Current mode (C.C. Mode), if it doesn’t exceed the current
setting value, the instrument is operated under the Constant
Voltage mode (C.V. Mode).
If the maximum output voltage of the instrument is larger than
36V, the minimum adjustable step of the rotation knob is

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20mV, if it is smaller than 36V, the minimum adjustable step
of the rotation knob is 10mV.
5-3.Over Voltage /Current Protection Setting
--Over Voltage Protection Setting:
Set to OVP SET window by pressing [MENU], modify the OVP
setting value with [F/C] key to input integral or dismal number,
then press [ENTER].
--OVP Status Clear Up:
When the output voltage exceeds the setting voltage, the
instrument will stop output and get into OVP mode by displaying
“OVP Error. Press “LOCAL” to reset” messages on the panel.
Now press [LOCAL] to clear OVP status, back to previous status.
--OverCurrentProtection Setting:
Set to OCP SET window by pressing [MENU], then switch OCP
to ON or OFF with the knob and press [ENTER]. When the OCP
is on, the output current equals or exceeds the setting current, the
instrument will stop output and get into OCP mode by displaying
“OCP Error. Press “LOCAL” to reset” messages on the panel,
Now press [LOCAL] to clear OCP status, back to previous status.
5-4. Display Contrast Setting:
Set to Contrast Setting window by pressing [MENU], modify the
Contrast setting value with knob, then press [ENTER].
5-5. Buzzer Setting
Set to Buzzer Set window by pressing [MENU], switch Buzzer to
ON or OFF with the knob, then press [ENTER].
5-6. GPIB/RS232 Interface Setting
Set to Interface window by pressing [MENU]. If the GPIB is
displayed, the Address value window will be appeared, if the
RS-232 is displayed, the Baud Rate window will be appeared, then
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17 
using the wheel knob to modify the value and press [ENTER] to
complete the setting.
Note: The system will detect the interface used at present
automatically, and switch the detected interface over the
setting interface of GPIB or RS-232.
Example:
1) If want to set the GPIB address value to 08:
Set to interface window by pressing [MENU], and adjust the
address value to 08 with the wheel knob and press [ENTER] to
complete the setting.
2) If want to set the RS-232 Baud Rate to 9600:
Set to interface window by pressing [MENU], and adjust the
Baud Rate value to 9600 with the wheel knob and press [ENTER]
to complete the setting.
For further details, please refer to the programmer manual of
PST/PSS/PSH series programmable power supply.
5-7. Remote Error Sensing
Anormal power supply can perform its best load regulation, line
regulation, low output impedance, and low output ripple and noise,
as well as the rapidly transient recovery response. Please refer to
figure 5-2. If there is any test lead connected between load and
output terminal, the best characters of power supply can not be
shown up on the load terminal.
Figure 5-2 The power supply with local error sensing

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The function of the Remote Error Sensing can only be applied to the
Constant Voltage mode as shown in Figure 5-3. The feedback point
of power supply must start from the load terminal directly. Therefore,
the power supply can display its function on the load terminal
instead of output terminal. To compensate the voltage drop causing
from the test lead, it needs to shift the voltage from the output
terminal of power supply, and the voltage on the load terminal
remains unchanged.
Figure 5-3 The power supply with remote error sensing
Error Sensing Open Protection
The sensing circuit must avoid open circuit without equipping with
Relay, Switch, and Connector. When the open circuit is occurred
abruptly on the sensing circuit, it will causeovershoot on the output
terminal. To prevent this kind of phenomenon, add small resistance
R1 and R2 or replace with diode as shown in the Figure 5-4.
Figure 5-4 The power supply with remote error sensing protection
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5-8. Test Lead Selective Table
When we use PSH-SER models power supply, the test lead must
have an enough current capacity to prevent from damaged. The
following is test lead selective table shows the maximum current
rating, based on 450A/cm2. A large test lead is recommended in
order to reduce the voltage drop as less as better on the test lead
(typical 0.5V maximum).
Wire Size
(AWG) Max. Current
(A) Wire Size
(AWG) Max. Current
(A)
20 2.5 661
18 4497
16 62155
14 10 1192
12 16 1/0 247
10 21 2/0 303
836

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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.
Warning: Do not remove covers. Refer servicing to
qualified personnel.
AVERTISS: Ne pas enlever le capot. Seul un personnel
habilité peut intervenir sur le matériel.
Warning: No operator serviceable components inside.
AVERTISS:Pas de maintenance sur les composants
internes.
Warning: For continued fire protection. Replace fuse
only with 250V fuse of the specific type and rating, and
disconnect power cord before replacing fuse.
AVERTISS: Pour une protection contre les risques d’incendie,
remplacer le fusible exclusivement par un modèle aux
caractéristiqueséquivalentes.
6-1. ADJUSTMENT AND CALIBRATION
The instrument has been fully calibrated at factory before delivery.
The readjustment is suggested only when the circuit of the
instrument is modified, or the instrument is proved exceeding the
specification by the sophisticated measured equipment. However,
the accuracy of the calibrated multimeter must be within ±0.1% or
better (GW model GDM-8145G or the equivalent equipment) and
WARNING
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1mV/AMP(±0.25%) Current Shunt. Besides, the current rating of
the output load must be larger than the 10% of the output current at
least.
--Preparation
1) 30 minutes warm up before calibration.
2) Ambient temperature:23±5°C, Humidity: Under RH70%.
3) When the instrument is powered on but not yet output, use
multimeter to measure TP301 AND TP302, adjust VR303 to
ensure the difference of voltage between two parts is at -10VDC,
then measure TP303 and TP304, adjust VR302 to make TP303
larger than TP304 to be about 100mVDC . If the Unit 2 and Unit 3
are included to the equipment, measure TP501 and TP502,
adjust VR501 to ensure the difference of voltage between two
points is -10VDC , and the TP504 among the Unit 2 and Unit 3
must be larger than TP503 to be about 40mVDC.
--Output Calibration Steps:
[Step 1]
Repress [LOCAL] for 4~5 seconds, the window will appear “Please
enter the password” (vary with different models: PSH-1036: 1036,
PSH-6006: 6006), now input the value number with the knob and use
[F/C] key to move key-in position, then press [ENTER] key. When
the value number is input by mistake, the system will jump out this
mode.
[Step 2] Voltage Calibration Steps

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At first, set the DMM to 200V voltage range.
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[Step 2.1]
Get into the window of Calibration item, select the item of Voltage
calibration with knob and press [ENTER].
[Step 2.2]
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 2.3]
Now, adjust VR301 properly for the measured voltage (Max) of
DMM according to the value displayed in the window, then press
[ENTER].
Note: During the adjustment, the maximum distortion range of the
measured value is at 0.005V.
[Step 3] Current Calibration Steps
At first, make sure the output is disconnected with test leads, if the
specification of current is smaller than 20A, can either use 20A range
of GDM-8145G or connect current shunt to output terminal to
measure the output current. If the specification of current is larger
than 20A, must connect current shunt to output terminal to measure
both ends of the current shunt with 200mV range of DMM.
[Step 3.1]
Get into the window of Calibration item, select the item of current
calibration with knob and press [ENTER] to startCurrent Calibration
Steps.
[Step 3.2]
Input measured voltage value (Max) with the knob and press

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[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 abrasivecleaners on any
portion of the instrument.
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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

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7-2. The Configuration of PSH-series Block System
The whole Block system consists of the following Circuit Blocks:
Power Factor Corrector: BD101, Q101-Q103, D102.
Micro Processor Unit (MPU): U308
Digital to Analog Converter (DAC): U316.
Analog Switch Circuit: U328, R356, R363, R370, C314, C318, C320,
U331.
Pulse Width Modulation: U206.
Driver Circuit: Q202-Q203, T202.
Power Stage: Q204-Q205, Q211-Q212, T203, D207-D208, L201,
C246-C249, C253.
Post Regulator: Q207, Q208.
Voltage Control Circuit: U334.
Current Control Circuit: U334.
Error Amplifier: U333.
Opto-isolator: U209.
Auxiliary Power supply: Q201, U203, T201.
OVP: U315, U331, Q209, U327, Q310, U328.
Unit 2: When the power reaches about 2 times the Unit 1, the Unit 2
will be used additionally.
Unit 3: When the power reaches about 3 times the Unit 1, the Unit 2
and Unit 3 will be used additionally.