GW Instek PSM-2010 User manual

PSM-SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
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CONTENTS PAGE
1. PRODUCT INTRODUCTION..............................................................
Programmable Power Supply
PSM-2010/3004/6003
USER MANUAL
GW INSTEK PART NO. 82SM-60030MA
PSM-SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
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ISO-9001 CERTIFIED MANUFACTURER

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This manual contains proprietary information, which is protected by
copyrights. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without prior
written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves the rights
to change specification, equipment, and maintenance procedures at any
time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.
1
1-1.DESCRIPTION.....................................................................................1
1-2.FEATURE............................................................................................2
2. TECHNICAL SPECIFICATIONS......................................................3
3. PRECAUTIONS BEFORE OPERATION.........................................6
3-1.UNPACKING THE INSTRUMENT ..........................................................6
3-2.CHECKING THE LINE VOLTAGE .........................................................6
3-3.ENVIRONMENT ..................................................................................7
4. PANEL INTRODUCTION...................................................................8
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4-1.FRONT PANEL....................................................................................8
4-2.REAR PANEL BRIEF..........................................................................10
4-3.DISPLAY BRIEF ................................................................................11
5. OPERATION INSTRUCTION .........................................................15
5-1.BASIC OPERATION...........................................................................15
5-2.FUNCTION KEY DESCRIPTION .........................................................16
5-3.OPERATION METHOD ......................................................................31
5-4.THE MAXIMUM VALUE OF THE OUTPUT SETTING.............................41
5-5.TEST LEAD ......................................................................................42

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6. MAINTENANCE.................................................................................43
6-1.FUSE REPLACEMENT .......................................................................43
6-2.LINE VOLTAGE CONVERSION..........................................................43
6-3.MEASUREMENT TECHNIQUES..........................................................44
6-4.ADJUSTMENT AND CALIBRATION....................................................46
6-5.CLEANING........................................................................................51
7. THE SYSTEM DIAGRAM AND DESCRIPTION .........................52
7-1.BLOCK DIAGRAM ............................................................................52
7-2.THE CONFIGURATION OF BLOCK SYSTEM.......................................53
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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) Frame or Chassis
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 as follows:
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 connected to 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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Declaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan
GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.
No. 69 Lushan Road, Suzhou New District Jiangsu, China.
declare that the below mentioned product
PSM-3004/6003/2010
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, 93/68/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+A2:2001)
Conducted and Radiated Emissions
EN 55011: 1998 Electrostatic Discharge EN 61000-4-2: 1995+A1:1998+A2:2001
Current Harmonic
EN 61000-3-2: 2000 Radiated Immunity EN 61000-4-3: 1996+A1:1998+A2 :2001
Voltage Fluctuation
EN 61000-3-3: 1995+A1:2001 Electrical Fast Transients EN 61000-4-4: 1995+A2:2001
------------------------- Surge Immunity
EN 61000-4-5: 1995+A1:2001
------------------------- Conducted Susceptibility
EN 61000-4-6: 1996+A1:2001
------------------------- Power Frequency Magnetic Field
EN61000-4-8 :1993+A1:2001
------------------------- Voltage Dips/ Interrupts
EN 61000-4-11: 1994+A1:2001
◎Safety
Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC
IEC/EN 61010-1: 2001
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1. PRODUCT INTRODUCTION
1-1. Description
PSM-series Programmable Power Supply is controlled by Micro Processor
Unit (MPU) with extreme high accuracy of 200W maximum, and the single
output with double range (switching between the main panel and
communication interface) that can easily connect communication interface
RS-232 or GPIB to computer in order to satisfy users’ demand for auto-testing
and auto-control. The software commands are fully complied with the SCPI
format, it’s convenient for user to proceed auto-tested and auto-controlled
application program.
The voltage and current are completely controlled by 16 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 keyboard.
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 secure users from danger
by using the instrument.
If need further technique support or update information, please enter our
web-side: http://www.goodwill.com.tw

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1-2. Feature
1) An overall digitalization of programmable interface with high resolution
and accuracy.
2) High stability and low draft.
3) Excellent contrast and brightest VFD display.
4) Single output and double range.
5) Constant voltage/current operation.
6) Low ripple and noise.
7) The convenient and high efficiency operation of setting interface.
8) Wheel knob for Fine and Coarse adjustment and item selection.
9) Both front and rear panels are equipped with Remote voltage sensing.
10) The protection function of output ON/OFF and Over Voltage/Current/
Temperature protection.
11) Intelligent control fan (Vary with different output power).
12) Warning signal by the built-in Buzzer.
13) A programmed calibration procedure.
14) The brand new panel design and the 1/2 rack size reduction volume
design.
15) Save and Recall function of 100 groups setting and proceed together
with auto operation can achieve the purpose of auto test.
16) IEEE-488.2 and SCPI compatible command setting.
17) Correspond to many safety regulations.
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2. TECHNICAL SPECIFICATIONS
Specification PSM-2010 PSM-3004 PSM-6003
Low Range 0~ +8V / 0~20A 0~ +15V / 0~ 7A 0~ +30V / 0~6A
DC Output High Range 0~ +20V/0~ 10A 0~ +30V/0~4A 0~ +60V/0~3.3A
Regulation
(% output +
offset)
Load regulation ≦0.01% + 2mV
Line regulation ≦0.01% +2mV
Constant
Voltage
Operation Ripple &
Noise
<350uVrms/
3mVpp
<350uVrms/
2mVpp
<500uVrms/
3mVpp,
<1mVrms/
3mVpp
(Rating voltage
>50V)
Regulation
(% output +
offset)
Load regulation ≦0.01% + 250uA
Line regulation ≦0.01% +250uA
Constant
Current
Operation Ripple &
Noise 2mArms
Resolution
Voltage 1mV 1mV 2mV
Programming Current 1mA 0.5mA 0.5mA
Voltage 0.5mV 0.5mV 1mV
Readback Current 1mA 0.1mA 0.5mA
Voltage 1mV
Front Panel Current 1mA(<10A),10mA(≧10A)
OVP 10mV
OCP 10mA

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Specification PSM-2010 PSM-3004 PSM-6003
Accuracy
Voltage 0.05% + 10mV
Programming
(@23℃±5℃),
±(% output
+ offset) Current 0.2% + 10mA
Voltage 0.05% + 5mV
Readback
(@23℃±5℃),
±(%output
+ offset) Current 0.15% + 5mA
Voltage 0.1% + 10mV
OVP/OCP
Accuracy,
±(% output
+ offset) Current 0.4% + 10mA
Interface Command
proceeding time (The
average proceeding time
during receiving GPIB or
RS-232 command until
voltage output)
100ms
Load
Time
Full
Load
No
Load
Full
Load
No
Load
Full
Load
No
Load
Rise 95ms 45ms 50ms 20ms 80ms 100ms
Voltage Setting
Response Time
(Resistor Load) Fall 30ms 450ms 45ms 400ms 30ms 450ms
Stability ±(% of output + offset): Following 1 hour warm-up, the output level drift
after 8 hours test under a fixed load, test lead and ambient temperature.
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Specification PSM-2010 PSM-3004 PSM-6003
Voltage 0.02% + 1mV
Current 0.1% + 1mA
Memory Store/Recall points 0~99
Temperature Coefficient per ℃±(% of output + offset) : Maximum change in
output / readback per ℃after 30-minute warm-up.
Voltage 0.01% + 3mV
Current 0.02% + 3mA
AC Input 100VAC, 120VAC, 220VAC ±10%,
230VAC, –6%+10%, 50/60Hz
Input Rating 700VA, 380W 300VA, 220W 600VA, 310W
Interface RS-232, GPIB
Accessories (1) Power cord ×1, Instruction manual×1,
Programmer Manual×1
Type
Item Common terminal CE Safety
terminal
Test Lead 1 1 set
Sense Lead 0 1 set
Grounding Lead 0 1
Short bar A
on Front panel 3 0
Accessories (2)
Short bar B
on Rear panel 3 3
Operation
Environmental
Indoor use
Altitude up to 2000 m
Ambient temperature:
To satisfy specifications : 10℃~ 35℃( 50°F ~ 95°F )
Maximum operating ranges: 0℃~ 40℃( 32°F ~ 104°F )
Relative humidity: 85% RH (max.) non condensing
Pollution degree: 2
Storage Temperature &
Humidity -10℃to 70℃, 70%RH (maximum)
Dimensions & Weight 230(W)×140(H)×380(L) mm. Approx. 10kg.

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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 by any kind of line voltages shown in the table below.
Before connecting the power plug to an AC line outlet, make sure the voltage
selector of the rear panel is set to the correct position corresponding to the line
voltage. It might be damaged the instrument by connecting to the wrong AC line
voltage.
WARNING. To avoid electrical shock the power cord protective
grounding conductor must be connected to ground.
When line voltages are changed, replace the required fuses shown as below:
Model Line
voltage Range Fuse Line
voltage Range Fuse
PSM-2010 T 7A
250V T3.15A 250V
PSM-3004 T3.15A
250V T 1.6A
250V
PSM-6003
100V
120V 90-110V
108-132V T 5A
250V
220V
230V 198-242V 216-250V T2.5A
250V
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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 it in a
place where ambient temperature exceeds 40℃.

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4. PANEL INTRODUCTION
4-1. Front Panel
1. Power Switch Connect the AC power, then press ON/OFF
power switch.
2. Display Indicate the setting of voltage/current value, output voltage/current value and the status of
setting and output.
+Output Terminal Positive output terminal.
3. S+ Output Terminal Positive sampling terminal.
-Output Terminal Negative output terminal.
4. S- Output Terminal Negative sampling terminal.
5. GND Terminal Connect the ground terminal to chassis.
6. Rotary Encoder Wheel knob.
7. ＜ ＞ Cursor (for value input).
8. LOCK A software to lock up panel setting (keep
pressing for a few second).
9. V SET Output voltage setting.
10. I SET Output current setting.
11. OVP SET Over Voltage protection value setting.
(Level, ON/OFF, Clear)
12. OCP SET Over Current Protection value setting.
(Level, ON/OFF, Clear, DELAY)
13. 20V, 10A/8V,20A Select output voltage /current range (The
secondary function key).
RECALL ⇧Recall last group of data setting.
Warning. When query the memory setting data, in
order to avoid personal injury and damaging the
machine, it is suggested to disconnect the output.
14.
RECALL ⇩Recall next group of data setting.
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15. DELAY Set the voltage and current output time in the
automatic operation mode.
16. AUTO RANGE
(AUTO INFO)
Proceed setting step by step. During setting
proceeding, press this key can display the
memory address of the setting and its residual
time and period (The secondary function key).
17. AUTO Turn ON/OFF the auto operation.
18. RECALL
Recall one of the memory datas (The secondary
function key).
When query the memory setting data, in
order to avoid personal injury and damaging
the machine, it is suggested to disconnect the
output.
19. STORE Store the data to one of the memory groups
(The secondary function key).
20. SHIFT Select the secondary function key.
21. “0”, “1”… “9”, “.” The key for number input.
22. ENTER The key for Input confirmation.
23. LOCAL Clear the remote control mode by using the
panel control setting instead.
24. GPIB/RS-232 Select GPIB or RS-232 by pressing [SHIFT]
[GPIB/RS-232].
V STEP Voltage Step setting (The secondary function
key).
25. I STEP Current Step setting (The secondary function
key).
I△Under the status of [SHIFT], press I△to
ascend one step of output current value.
I▽Under the status of [SHIFT], press I▽to
descend one step of output current value.
V△Under the status of [SHIFT], press V△to
ascend one step of output voltage value.
26.
V▽Under the status of [SHIFT], press V▽to
descend one step of output voltage value.

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27. FL DIMMER
Adjust the intensity of VFD. After pressing
[SHIFT], can press [FL DIMMER] continually
until the required brightness is reached. Then
press again the [SHIFT] to end the setting.
28. Set beeper by pressing [SHIFT][ ] to turn
ON/OFF the buzzer.
29. OUTPUT Turn on or off output by pressing the knob.
30. DISPLAY LIMIT
Switch over the voltage and current mode by
pressing [DISPLAY LIMIT].
The setting value will be displayed, press again
[DISPLAY LIMIT] or wait a few seconds to
return to the previous status.
4-2. Rear Panel brief
1. AC Power Socket AC power input terminal.
2. AC Select Switch Switch Voltage to 100V, 120V, 220V or 230V,
50/60Hz.
3. Cooling Fan A cooling fan.
4. Interface GPIB or RS-232 communication interface.
5. Output Terminal The output terminals of rear panel connected
with case, including output sampling terminal
and ground terminal.
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4-3. Display brief
1. Adrs Set the power sup
p
ly to the address of Listen or
Talk by using the interface card.
2. Rmt Set the power supply to Remote Control mode.
3. ERROR The Error message appears when the command
from the Remote Controlled Interface is in error.
4. SHIFT Select the second level function.
5. AUTO Set the power supply to Auto mode.
6. 8V, 15V, 20V,
30V, 60V The output ranges of power supply.
7. OVP
When the indicator lights up without blinking,
means the OVP function is on. When the Over
Voltage Protection function is triggered, the
indicator will be changed to blinking status, and
the message “OVP TRIPPED” will be displayed.
Now clear the OVP function. When the light of
indicator is off, means the OVP function is off.
8. OCP
When the indicator lights up without blinking,
means the OCP function is on. When the Over
Current Protection function is triggered, the
indicator will be changed to blinking status, and
the message “OCP TRIPPED” will be displayed.
N
ow clear the OCP function. When the light of
indicator is off, means the OCP function is off.

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9. ＊
When the power supply is set to operation mode,
the symbol of “＊” will be lighted up.
zWhen the Output is on, the symbol of “＊”
li
g
hts up to indicate the power suppl
y
is in
the operation mode, when the meter
displa
y
s the measurement value, the
symbol of “＊” becomes blinking.
10. CC The CC light is on to indicate the instrument is
in the CC mode.
11. CV The CV light is on to indicate the instrument is
in the CV mode.
12. The light of “ ” is on to indicate the
b
uzzer is
on.
13. Lock The Lock light is on to indicate the
p
anel control
knobs is locked up.
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Figure 4-1 Front Panel

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Figure 4-2 Rear Panel
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5. OPERATION INSTRUCTION
5-1. Basic Operation
zThe applied Voltage/Current Unit for this series instruments is Volt and
Amp.
zThe Instrument requires 30 minutes warm-up with no load before
operation or calibration to achieve rated accuracy.
zThe Factory setting is in panel operation mode that enable user to operate
the instruments directly from panel control knob. Besides, when the
remote controller is on line, the operation can only be proceed through it,
unless the LOCAL key is pressed, at this time, the OUTPUT is still
working. Whenever the power is reset, the output will be at OFF status
and the operation is through front panel operation mode.
zThe series of power supplies have double output ranges, after power on,
the output is always at OFF status, and the setting is stayed at the
previous setting status before power off.
zWhatever the output is at ON or OFF, the output range can be switched
dynamically. During the switch process, if the original setting value is
more than the maximum output range after switch, the setting value will
be modified automatically to the maximum output value after switch.
zA short plate is attached to the sampling terminal of the front panel,
when use the remote sense, the short plate must be removed.

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zWhen the output is set to OFF, the OUTPUT OFF message will be
displayed on the front panel, the setting still can be modified. At the same
time of modification, the corresponding setting item or status will be
displayed. When the output is set to ON, the setting can also be modified.
At the same time of the modification, the panel display mode is changed
from measurement value to the setting item or status. Under the normal
setting of voltage or current, the panel will display measurement value, if
want to change the displayed mode to setting value, press
[SHIFT][DISPLAY LIMIT] to input setting value, after a few seconds, if
no value is input, the display mode will be switched to measurement value
automatically.
zWhen set output on, the symbol of “＊” will be appeared on the upper left
of meter to indicate the instrument is at output mode. when the meter
displays output measurement value(at measuring status), the symbol of
“＊” becomes blinking.
5-2. Function Key Description
Press one of the function keys to proceed function setting, after setting,
press again the function key to leave the function or press another key for
another setting.
zV SET : Output voltage setting
The minimum resolution of output voltage is at 1mV. When set output
to ON, press [V SET] to proceed voltage setting, now the meter will
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display measurement value (the symbol of “＊”is blinking). Besides,
when the operation is set to “DISPLAY LIMIT” mode, the meter will
display setting value (the symbol of “＊” lights up without blinking).
When the output is set to OFF, the output voltage setting (V SET) can
be done by pressing [V SET] directly or by changing the “DISPLAY
LIMIT” mode (please refer to the operation of DISPLAY LIMIT).
Setting method 1: Press [V SET][Number key (voltage value)] [ENTER]
to set output voltage.
Setting method 2: Press [V SET][number knob (voltage value)] to
change the output voltage setting immediately, then press again [V SET]
to complete voltage setting. When use this method with the output on,
the input voltage will be changed following the input value by rotating
the knob which can be adjusted by moving the [＜] or [＞] cursor.
For example: Set output voltage to 8.000V.
Press [V SET][8][.][0][0][0][ENTER] or [V SET][8][ENTER].

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zI SET : Output current setting
The minimum resolution of output current is at 1mA(output≧10A at
10mA). When set output to ON, press [I SET] to proceed current setting,
the meter will display measurement value (the symbol of “＊” is on with
blinking). Besides, when the operation is set to “DISPLAY LIMIT”
mode, the meter will display setting value (now the symbol of “＊” is on
without blinking). When the output is set to OFF, the output current
setting can be done by pressing [I SET] directly or by changing the
“DISPLAY LIMIT” mode (please refer to the operation of DISPLAY
LIMIT).
Setting method 1: Press [I SET][Number key (current value)] [ENTER]
to set output current.
Setting method 2: Press [I SET][number knob (voltage value)] to change
the output current setting immediately, then press again [I SET] to
complete current setting.。When use this method with the output on, the
input current will be changed following the input value by rotating the
knob which can be adjusted by moving the [＜] or [＞] cursor.
For example: Set output voltage to 20.00A
Press [I SET][2][0][.][0][0][ENTER] or [I SET][2][0][ENTER]
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When the current load runs through output terminal, if the current
exceeds the setting value, the operation of the instrument will be set to
Constant Current Mode (C. C. Mode), if the current does not exceed the
setting value, the operation will be set to Constant Voltage mode (C. V.
Mode).
zOVP SET: Over Voltage protection setting (LEVEL, ON/OFF
/CLEAR)
Setting method: After pressing [OVP SET], get into Over Voltage
Protection Level setting, now use the number key (or knob) to input
setting value, then press [ENTER] to complete the setting change.
When get into Over Voltage protection state setting by selecting Over
Voltage protection state and pressing [ENTER], use the knob to select
ON/OFF/CLEAR, then press [ENTER] to complete the setting change.
Remark: When the Over Voltage protection of the instrument is
triggered, use the function of Over Voltage Protection
Clear (OVP CLEAR) to clear its protection state.
For example: Set Over Voltage protection value to 21.00V at ON state.
After pressing [OVP SET] to get into OVP LEVEL setting, then input
[2][1][.][0][0][ENTER] to get into OVP STATE setting, now set the
knob select state to ON and press [ENTER] to complete setting.

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zOCP SET: Over current protection setting (LEVEL, ON/OFF/
CLEAR, DELAY)
Setting method: After pressing [OCP SET] to get into Over Current
Protection Level (OCP LEVEL) setting, use the number key (or knob) to
input setting value and press [ENTER] to complete the setting change.
When get into over current protection state, use the knob to select
ON/OFF/CLEAR, then press [ENTER] to change the setting.
When the Over Current Protection is set to ON, then get into Over
Current Protection Delay setting (The minimum Delay time is at 0
second, the maximum is at 10second, and the scale base is 0.1 second).
zOCP DELAY TIME CHART
Remark: When the over current protection of the instrument is
triggered, use the function ++of Over Current Protection
Clear (OCP CLEAR) to clear its protection state.
For example: Set over current protection value to 21.00A at ON state.
After pressing [OCP SET], get into OCP LEVEL setting, input
[2][1][.][0][0][ENTER], now set the knob select state to ON and press
[ENTER] to complete setting.
zOutput voltage/current selection
When re-power on, the output range is stayed at the previous setting
before power off. Besides, whatever the output is at ON or OFF status,
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the output range can be switched over dynamically. When the setting
value is more than the value of the switched voltage/current range, it
will be modified to maximum value of the switched range automatically.
If the setting value is less than the value of the switched voltage/current
range, it will be stayed as it is.
zPSM-2010 ：20V,10A/8V,20A
zPSM-3004 ：30V,4A/15V,7A
zPSM-6003 ：60V,3.3A/30V,6A
For example: Set output range of PSM-2010 to 20V, 10A
Press [SHIFT][20V,10A], the output range will be changed to 20V,10A.

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zDELAY : The Auto mode setting for the voltage/current Delay time
Setting method: Press [SHIFT] [DELAY] to appear the “MIN.” setting item
selection, then input setting value and press [ENTER] to “SEC.” setting
item selection, input setting value and press [ENTER] to change Delay
setting.
Remark:
1) The minimum unit of the “SEC.” Setting picture is at 0.1 sec.
2) The Delay setting is effective only under the Auto running
operation, therefore, during the storage proceeding, the Delay
setting will be saved to the memory address simultaneously.
For example: Set the Delay time to 9 minutes and 9.9 seconds.
Press [SHIFT] [DELAY] to appear “MIN” setting item, input [9] and
[ENTER], then select “SEC” setting item and input [9][.][9][ENTER] to
complete DELAY setting.
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zRECALL : Recall the setting data from the memory bank
Remark:
1) After RECALL setting, it needs to press again [SHIFT]
[RECALL] to leave the function.
2) When query the stored setting data, in order to avoid personal
injury and damaging the machine, it is suggested to turn off
theoutput.
Recall Setting method: Press [SHIFT][RECALL](Recall Data setting
from the memory bank), use knob or number key to input the memory
address.
For example: Recall the setting data from the memory address of 01.
Press [SHIFT][RECALL], get into RECALL setting, then press
[0][1][ENTER] to complete Recall.

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zAUTO RANGE
AUTO RANGE Setting method: Press [SHIFT][AUTO RANGE] , use
knob to select the item for setting change.
For example: Set the AUTO RANGE to: START : 00 ; CEASE : 99 ;
CYCLE : 99999。
Press [SHIFT][AOTU RANGE] to enter AUTO RANGE setting item
selection, first select START and press [ENTER], then input [0][0]
[ENTER] to complete the change. Then input [9][9][ENTER] to CEASE
setting item to complete CEASE setting. Furthermore, input [9][9][9][9][9]
[ENTER] to CYCLE setting item to complete CYCLE setting. After
proceeding above setting, select SAVE to store the setting or select EXIT
to exit the setting without storing.
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zSTORE : Save the setting data to one of the memory groups
STORE setting method: Press the function of [STORE], use knob or
number key to input the memory address to save the data.
For example: Store the setting date to the memory address of 01.
Press [SHIFT][STORE] to get into STORE setting, then input
[0][1][ENTER] to complete the Store.
zRotary Encoder : The wheel knob for number input or function
selection.
The function knob can be used for number input or function selection.
When the knob is used as number input, it should be matched with the
cursor moving keys [<] and [>].
z[<] and [>]: [<] and [>] are cursor moving keys for number input or
function selection.
zLOCAL(GPIB/RS-232) : Clear the Remote Control mode and use the
panel control mode instead. Press [SHIFT][GPIB/RS-232] to GPIB
or RS-232 setting selection.
Press [LOCAL] function can clear Remote Control mode and use panel
control instead. After press [SHIFT][GPIB/RS-232], use knob to select

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GPIB or RS-232 and press [ENTER] to confirm the setting. If want to set
to GPIB, use knob to select input address, then press [ENTER] to
complete GPIB setting. If want to set to RS-232, use knob to select input
BAUD rate, then press [ENTER] to complete RS-232 setting.
Remark: When enter GPIB/RS-232 setting, can press again [SHIFT]
[GPIB/RS-232] to leave the function.
For example: Select GPIB communication interface and set the
ADDRESS to 08.
Press [SHIFT] [GPIB/RS-232], use wheel knob to select GPIB and press
[ENTER] to confirm the setting. Then use wheel knob to select [08] and
press [ENTER] to complete GPIB setting.
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For example: Select RS-232 communication interface and set the BAUD
rate to 9600.
Press [SHIFT] [GPIB/RS-232], use wheel knob to select RS-232 and
press [ENTER] to confirm the setting. Then use wheel knob to select
[9600] and press [ENTER] to complete RS-232 setting.
zENTER : The key for input confirmation.
zSHIFT : The push-button to select the second level function.

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zOUTPUT : Turn on/off the output
When the output is set to OFF, the OUTPUT OFF message will be
displayed on the front panel, and the CC and CV indicators are off, but
the rest of indicators keep at the original setting. When Output is on, the
symbol of “＊” at the upper left corner of the panel will be on to indicate
the power supply is in the output mode, when the meter displays the
measurement value, the symbol of “＊” becomes blinking (the symbol of
“＊” is on without blinking when the display other than the measurement
value). When the instrument is operated in the CV mode, the CV
indicator is on, while in the CC mode, the CC indicator is on.
zLOCK : The key to lock up panel setting.
Press the LOCK key to lock up the panel setting, now, the Output key is
still working. Press the key again for several seconds to unlock the panel
setting.
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zV STEP : The step setting of voltage.
Set the maximum value of Step to be the rating value of the setting
range.
Switch to “V STEP” by pressing [SHIFT][V STEP], use number key (or
knob) to input setting value, then press [ENTER] to complete and store
the voltage step setting.
For example: Set the “V STEP” to 1.000V.
Press [SHIFT] [V STEP], then input [1][.][0][0][0][ENTER] to
complete and store the voltage step setting.
zI STEP : The step setting of current.
Set the maximum value of Step to be the rating value of the setting
range.
Switch to “I STEP” by pressing [SHIFT][I STEP], use number key (or
knob) to input setting value, then press [ENTER] to complete and store
the current step setting.

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For example: Set the “I STEP” to 1.000A.
Press [SHIFT] [I STEP], then input [1][.][0][0][0][ENTER] to complete
and store the current step setting.
zDISPLAY LIMIT : Switch panel display to the voltage/current
setting mode.
Display the present voltage and current value, this function can be
operated both on Output on and off.
Switch to the voltage/current setting mode by pressing [DISPLAY
LIMIT], then press again [DISPLAY LIMIT] for several seconds to leave
the setting mode and back to the measurement mode or “OUTPUT OFF”.
The operation of the voltage/current setting can be matched with the [V
SET] or [I SET] to change the output value. When set the output to ON,
the change of value will be reacted to the output immediately.
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5-3. Operation Method
The applied Voltage/Current Unit for this series instruments is Volt and
Amp.
zConstant Voltage Operation
1) Connect load to output terminal:
For the safety, when connect the load to output terminals of (+)
and (-), it must turn off the power.
2) Select output range:
Turn on the power after the load is well connected, select the
adequate operation range by pressing [SHIFT][8V/20A] or
[SHIFT][20V/10A]).
3) Set the current limit value:
Press [I SET], the panel operation is set to current value input
mode, set the desired change value by using the number key or
the wheel knobs (the wheel knob can be used together with [<] or
[>] to adjust the resolution).
4) Set the desired output voltage value:
Press [V SET], the panel operation is set to voltage value input
mode, change to the desired value by using the number key or
the wheel knobs (the wheel knob can be used together with [<] or
[>] to adjust the resolution).