GW Instek PEL-300 User manual

1
EC 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
PEL-300
is 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 are applied:
EN 61326-1:Electrical equipment for measurement, control and laboratory use––EMC requirements
(1997+A1:1998)
Conducted Emission Electrostatic Discharge IEC 1000-4-2 (1995)
Radiated Emission EN 55022 class B (1994) Radiated Immunity IEC 1000-4-3 (1995)
Current Harmonics EN 61000-3-2 (1995) Electrical Fast Transients IEC 1000-4-4 (1995)
Voltage Fluctuations EN 61000-3-3 (1995) Surge Immunity IEC 1000-4-5 (1995)
------------------ ---------- ---------- Conducted Susceptibility EN 61000-4-6 (1996)
------------------ ---------- ---------- Power Frequency Magnetic field EN 61000-4-8 (1993)
------------------ ---------- ---------- Voltage Dip/Interruption EN 61000-4-11 (1994)
Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC
IEC/EN 61010-1:2001

2
CONTENTS
1. INTRODUCTION............................................................................................................................................1
1-1 Features................................................................................................................................................1
2. SPECIFICATIONS..........................................................................................................................................2
3. OPERATION ..................................................................................................................................................5
3-1 Front and rear panels............................................................................................................................5
3-2 Operations ............................................................................................................................................9
(1). Constant Voltage Mode...................................................................................................................10
(2). Constant Current Mode ...................................................................................................................10
(3). Constant Resistance Mode..............................................................................................................11
(4). Setting of maximum input power......................................................................................................11
(5). Setting of operational frequency......................................................................................................12
(6). Setting of operational duty...............................................................................................................12
(7). Setting of dynamic mode .................................................................................................................13
(8). Setting of LOAD ON/OFF................................................................................................................13
(9). Setting of STEP...............................................................................................................................14
(10).Setting of MEMORY ........................................................................................................................14
(11).Setting the duration of execution .....................................................................................................16
(12).Setting of repeated executions ........................................................................................................17
(13).Setting of auto execution.................................................................................................................18
4. CALIBRATION PROCEDURES...................................................................................................................19
4-1 Adjusting the reference voltage of C.V. MODE...................................................................................19
4-2 Adjusting the reference voltage in 10Ω∼1kΩrange of C.R. MODE.....................................................20
4-3 Calibrating the D/A in 10Ωrange of C.R. MODE.................................................................................20
4-4 Calibrating the OFFSET of C.R. MODE..............................................................................................21
4-5 Calibrating the D/A of C.V. MODE ......................................................................................................22
4-6 Calibrating the D/A, A/D in 6A range of C.C. MODE...........................................................................22
4-7 Calibrating the D/A in 6A range of W SET ..........................................................................................23

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4-8 Calibrating the D/A, A/D in 0.6A range of C.C. MODE ........................................................................24
4-9 Calibrating the D/A in 0.6A range of W SET........................................................................................24
4-10 Calibrating the D/A, A/D in 60A range of C.C. MODE .........................................................................25
4-11 Calibrating the D/A in 60A range of W SET.........................................................................................26
4-12 Calibrating the reference voltage in 1Ωrange of C.R. MODE .............................................................26
4-13 Calibrating the D/A in 1kΩrange of C.R. MODE.................................................................................27
4-14 Calibrating the D/A in 100Ωrange of C.R. MODE...............................................................................28
4-15 Calibrating the D/A in 1Ωrange of C.R. MODE...................................................................................29
4-16 Calibrating the100Hz∼1kHz range of SW MODE ................................................................................30
4-17 Calibrating the D/A in 10Hz∼100Hz range of SW MODE ....................................................................31
4-18 Calibrating the D/A in 1Hz∼10Hz range of SW MODE ........................................................................32
4-19 D/A Calibrating the SENSE current offset of C.C., C.R. MODE ..........................................................33
5. APPLICATION..............................................................................................................................................34
5-1 The Table of the error message ..........................................................................................................34
5-2 Test Lead ............................................................................................................................................35
6. Safety summary....................................................................................................................36

1
1. INTRODUCTION
1-1 Features
Simple operation with smart push buttons
High resolution (20mV, 0.2mA, 0.33mΩ)
With voltage, current and power overload prevention functions
Easy access to maximum 100 files
Voltage range: 3 ~ 60V
Current range: 6mA ~ 60A
Maximum power: 300W
Operational modes: constant voltage (CV), constant current (CC), and constant
resistance (CR)
With self-testing and auto software calibration functions
Meet UL CSA IEC requirement

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2. SPECIFICATIONS
Functions Modes Ranges
Voltage Range 3 ~ 60V
Current Range 6mA ~ 60AOperational Limits Power Range 1 ~ 300W
Applicable Range 3 ~ 60 V
Accuracy ±(0.1% +40mV)
Resolution 20mV
Constant Voltage
(CV) Mode Step 20mV ~ 6V
Applicable Range 6mA ~ 60V
6A ~ 60A ±(0.5% +100mA)
0.6A ~ 6A ±(0.1% +10mA)Accuracy 6mA ~ 0.6A ±(0.1% +1mA)
6A ~ 60A 20mA
0.6A ~ 6A 2mAResolution 6mA ~ 0.6A 0.2mA
6A ~ 60A 20mA ~ 6A
0.6A ~ 6A 2mA ~ 6A
Constant Current
(CC) Mode
Step 6mA ~ 0.6A 0.2mA ~ 6A
Range 1Hz ~ 1kHz
Accuracy ±5%
100Hz ~ 1kHz 5Hz
10Hz ~ 100Hz 0.5Hz
Frequency Resolution 1Hz ~ 10Hz 0.05Hz
Range 10% ~ 90%
Accuracy ±10%
Constant Current
(CC) Mode Dynamic Status
Cycle Resolution 1%

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Functions Modes Ranges
Applicable Range 50mΩ~ 1kΩ
100Ω~ 1kΩ±(5% + 1Ω)
10Ω~ 100Ω±(5% + 100mΩ)
1Ω~ 10Ω±(5% + 10mΩ)
Accuracy
50mΩ~ 1Ω±(5% + 1mΩ)
100Ω~ 1kΩ330mΩ
10Ω~ 100Ω33mΩ
1Ω~ 10Ω3.3mΩ
Resolution
50mΩ~ 1Ω0.33mΩ
100Ω~ 1kΩ330mΩ~ 100Ω
10Ω~ 100Ω33mΩ~ 100Ω
1Ω~ 10Ω3.3mΩ~ 10Ω
Constant Resistance
(CR) Mode
Step
50mΩ~ 1Ω0.33mΩ~ 1Ω
Applicable Range 1 ~ 300W
Accuracy ±(2% + 4W)Power Setting Resolution 0.1W
Accuracy ±(0.1% + 60mV)
Voltage Readback Resolution 20mV
6A ~ 60A ±(0.5% + 100mA)
0.6A ~ 6A ±(0.1% + 10mA)Accuracy 6mA ~ 0.6A ±(0.1% + 1mA)
6A ~ 60A 20mA
0.6A ~ 6A 2mA
Current Readback
Resolution 6mA ~ 0.6A 0.2mA
Memory Number of Data Saving 0 ~ 99

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Functions Modes Ranges
Time Setting 1 sec. ~ 999 min. 59 sec.
Timer Resolution 1 sec.
Dynamic Operation 0°C ~ 40°C
Temperature Storage -10°C ~ 70°C
Dynamic Operation 80% (Max.)
Humidity Storage 70% (Max.)
Power Source AC 100V, 120V, 220V, 240V ±10% 50/60 Hz
110V/120V T 0.5A 250V
Replace Fuse Type 220V/240V T 0.2A 250V
Watts 40W
Rated Input VA 50VA
In door
Altitude up to 2,000m
Installation Category II
Operation Environment
Pollution Degree 2
Accessories User‘s Manual x 1; Power Cord x 1
Dimensions 255mm(D) x 145mm(H) x 346mm(W)
Weight 9kg (approx.)

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3. OPERATION
3-1 Front and rear panels
Graph 3-1 Front Panel

6
Graph 3-2 Rear Panel

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1
POWER : “▃” -- power is on; “▉” -- power is off.
2
C.C. MODE : To set operation in constant current mode.
3
C.V. MODE : To set operation in constant voltage mode.
4
C.R. MODE : To set operation in constant resistance mode.
5
RCL V: To recall the previous batch of memorized data.
6
RCL W: To recall the next batch of memorized data.
7
STEP V: To add a STEP value to the values of pre-set voltage, current and resistance.
8
STEP W: To subtract a STEP value from the values of pre-set voltage, current and resistance.
9
SW ON/OFF : To switch on/off dynamic operational mode.
10
AUTO : To execute automatically based on pre-set data (under LOAD ON status ONLY).
11
LOAD ON/OFF : Turn on/off LOAD function.
12
SHIFT : To shift and proceed secondary functions.
(1) SHIFT + C.C. MODE(Over Load Reset): To cancel overload protection.
(2) SHIFT + LOCAL(ADDR): To set location of GPIB.
(3) SHIFT + RCL V(STO): To save current data in memory.
(4) SHIFT + RCL W(RCL): To recall data from memory, or to retrieve the number of starting batch and ending
batch, and the times of execution of the memory that will be applied.
(5)SHIFT + AUTO (DLY): To set the time of execution.
(6)SHIFT + V.I.R. SET(V.I.R. STEP): To set the step value of voltage, current, and resistance.

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13
V.I.R. SET : To set the values of input voltage, current, and resistance.
14
W SET : To set the maximum of input power.
15
FREQ. SET : To set the frequency in dynamic operational mode.
16
DUTY SET : To set DUTY under dynamic operational mode.
17
0 ∼9 : The buttons for input numbers.
18
↵: To complete data inputting.
19
DC INPUT : The input terminal of the electronic load (Max.10A ).
20
LOCAL : Not used
21
MEMORY : To display different sets of data memorized.
22
DISPLAY A : To display current applied.
23
DISPLAY V : To display voltage applied.
24
DISPLAY : To display unit, status, and mode.
25
DC INPUT : The input terminal of the electronic load (Max. 60A).
26
Ventilator : To exhaust hot air.
27
AC SOCKET : Its circuit includes a fuse, a distributor, and a filter.

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3-2 Operations
Graph 3-3
PEL - 300
ELECTRONIC LOAD DC POWER SUPPLY
++
--

10
(1) Constant Voltage Mode:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.V. MODE button (the light of C.V. MODE will be
on).
pPress LOAD ON/OFF button (the light of LOAD will be on), the displays will indicate the value of
external voltage and current.
Example: To set input voltage at 20V in constant voltage mode
STEP 1. Press C.V. MODE
STEP 2. Press V.I.R. SET
STEP 3. Press 20 (unit is specified as “V” )
STEP 4. Press ↵
(2). Constant Current Mode:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.C. MODE button (the light of C.C. MODE is on).
pPress LOAD ON/OFF button (the light of LOAD is on), the displays will indicate the value of external
voltage and current.
Example: To set input current at 1.248A in constant current mode
STEP 1. Press C.C. MODE
STEP 2. Press V.I.R. SET
STEP 3. Press 1.248 (unit is specified as “A” )
STEP 4. Press ↵

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(3). Constant Resistance Mode:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.R. MODE button (the light of C.R. MODE is on).
pPress LOAD ON/OFF button (the light of LOAD is on), the displays will indicate the value of external
voltage and current.
Example: To set input resistance at 500Ωin constant resistance mode
STEP 1. Press C.R. MODE
STEP 2. Press V.I.R. SET
STEP 3. Press 500 (unit is specified as “Ω” )
STEP 4. Press ↵
(4). Setting of maximum input power:
nSelect C.V. MODE, C.C. MODE or C.R. MODE.
oWhen the light of the selected mode is on, press W SET button. Input desired W value after the
display indicating the original W value.
pPress LOAD ON/OFF button.
Example: To set maximum input power at 300W
STEP 1. Press W SET
STEP 2. Press 300 (unit is specified as “W” )
STEP 3. Press ↵

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(5). Setting of operational frequency:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.C. MODE button (the light of C.C. MODE is on).
pPress FREQ. SET button; then input desired FREQ. value after the display indicating the original FREQ.
value.
Example: To set operational frequency as 1000Hz
STEP 1. Press FREQ. SET
STEP 2. Press 1000 (unit is specified as “Hz” )
STEP 3. Press ↵
(6). Setting of operational duty:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.C. MODE button (the light of C.C. MODE is on).
pPress DUTY SET button; then input desired DUTY value after the display indicating the original DUTY
value.
qPress LOAD ON/OFF button.
Example: To set operation duty at 50%
STEP 1. Press DUTY SET
STEP 2. Press 50 (unit is specified as “%” )
STEP 3. Press ↵

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(7). Setting of dynamic mode:
nConnect the instrument according to Graph 3-3.
oTurn the power switch to “ON” position, then press C.C. MODE button (the light of C.C. MODE is on).
pPress SW ON/OFF button; the light of SW is on which indicates the operation is proceeded in dynamic
mode.
Note: be sure to complete the settings of FREQ. and DUTY before setting the dynamic mode.
Example: To set operation in dynamic mode
STEP 1. Press SW ON/OFF button (the light of SW is on)
STEP 2. Press LOAD ON/OFF button
(the light of LOAD is on which indicates the operation is in SW mode)
(8). Setting of LOAD ON/OFF:
nTurn the power switch to “ON” position, then press C.C. MODE, C.V. MODE or C.R. MODE button.
oPress LOAD ON/OFF button; the light of LOAD is on which indicates the load has been turned on.
pPress LOAD ON/OFF button again; the light of LOAD is out which indicates the load has been turned
off.
Note: Make sure the preset input power is not too low that may cause an error message.

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9). Setting of STEP:
nTurn the power switch to “ON” position, then press SHIFT button to enable the secondary functions.
oPress V.I.R. SET button, key in digits to specify the value of STEP, then press ↵button to complete the
setting.
Examples:
To set STEP value at 0.02A in C.C. MODE
STEP 1. Press SHIFT
STEP 2. Press V.I.R. SET
STEP 3. Press 0.02
STEP 4. Press ↵
To set STEP value at 1V in C.V. MODE
STEP 1. Press SHIFT
STEP 2. Press V.I.R. SET
STEP 3. Press 1
STEP 4. Press ↵
To set STEP value at 0.33Ωin C.R. MODE
STEP 1. Press SHIFT
STEP 2. Press V.I.R. SET
STEP 3. Press 0.33
STEP 4. Press ↵
(10). Setting of MEMORY:
nTurn the power switch to “ON” position, then press C.C. MODE, C.V. MODE or C.R. MODE button.
oSet operational voltage, current, resistance, frequency, DUTY, time, and the times of execution.
pPress SHIFT key to enable the secondary functions; press RCL V; key in digits to specify a batch;
then press ↵to complete the setting and to save them in the memory.
Note: Be sure to complete the setting of the data to be saved before proceeding execution.

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Examples:
In C.V. MODE, to set voltage at 10V, W SET at 300W, STEP at 1V and to save current data in the 99th batch.
STEP 1. C.V. MODE STEP 9. V.I.R. SET
STEP 2. V.I.R. SET STEP10. 1
STEP 3. 10 STEP11. ↵
STEP 4. ↵STEP12. SHIFT
STEP 5. W SET STEP13. RCL V
STEP 6. 300 STEP14. 99
STEP 7. ↵STEP15. ↵
STEP 8. SHIFT
In C.C. MODE, to set current at 1A, power at 300W, STEP at 0.2A, FREQ. at 1000Hz, DUTY at 50%. To work
in SW MODE, and save data in the 11th batch.
Note: In addition to setting the values of current, power and STEP, FREQ. SET, and DUTY SET should also be
set while proceeding the setting of C.C. MODE SW function.
STEP 1. C.C. MODE STEP12. FREQ. SET
STEP 2. V.I.R. SET STEP13. 1000
STEP 3. 1 STEP14. ↵
STEP 4. ↵STEP15. DUTY SET
STEP 5. W SET STEP16. 50
STEP 6. 300 STEP17. ↵
STEP 7. ↵STEP18. SW ON/OFF
STEP 8. SHIFT STEP19. SHIFT
STEP 9. V.I.R. SET STEP20. RCL V
STEP10. 0.2 STEP21. 11
STEP11. ↵STEP22. ↵

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To save data in current batch
STEP 1. SHIFT
STEP 2. RCL V
STEP 3. ↵
(Assume MEMORY indicates 33, data will then be saved in the 33rd batch right after proceeding the 3 STEPs
aforementioned.)
(11). Setting the duration of execution:
nPress SHIFT to enable the secondary function.
oPress AUTO key and key in digits with a decimal (number before the decimal means “minute”; the one
after the decimal is specified as “second”) for the duration of execution.
Examples: To set the running time as 20 minutes and 38 seconds
STEP 1. SHIFT
STEP 2. AUTO
STEP 3. 20.38
STEP 4. ↵
To set the running time as 40 seconds
STEP 1. SHIFT
STEP 2. AUTO
STEP 3. 0.40
STEP 4. ↵

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(12). Setting of repeated executions:
nPress SHIFT to enable the secondary function.
oPress RCLWkey.
pKey in three sets of digits with two decimals in between. The first set of the digits is specified as “the
starting batch”, the second set is specified as “the ending batch”, and the last set is specified as
“the number of executions.”
qThen press ↵.
Example:
To run batch 1 to batch 98 for 99 times
STEP 1. SHIFT
STEP 2. RCL W
STEP 3. 1.98.99
STEP 4. ↵
STEP 5. AUTO
STEP 6. LOAD ON/OFF
To retrieve data from batch 1 till batch 18
STEP 1. SHIFT
STEP 2. RCL W
STEP 3. 1.18
STEP 4. ↵
To run batch 1 to batch 98 endlessly
STEP 1. SHIFT
STEP 2. RCL W
STEP 3. 1.98
STEP 4. ↵
STEP 5. AUTO
STEP 6. LOAD ON/OFF
To retrieve data from the 10th batch
STEP 1. SHIFT
STEP 2. RCL W
STEP 3. 10
STEP 4. ↵