GW instek GPS-4303, GPS-4251, GPS-3303, GPS-2303 Adjustment Manual
GPS
4303/ 4251/ 3303/ 2303
Verification/ Adjustment Manual
GPS-4303/ 4251/ 3303/ 2303
Table of Contents
Table of Contents
How to Use this Manual................................................ 4
Specification............................................................... 5
Front Panel ................................................................ 7
Performance Verification .............................................. 9
Overall Procedure............................................................
Verification Equipment..................................................... 9
Output Voltage Verification ..............................................10
Tracking Series Voltage Verification...................................12
Output Current Verification..............................................14
Tracking Parallel Current Verification .................................16
Current Load Regulation Verification .................................18
Ripple Current Verification...............................................20
Voltage Load Regulation Verification..................................22
Tracking Series Load Regulation/ Ripple Verification ............24
Ripple Voltage Verification ...............................................26
Recording Tables............................................................28
9
Adjustment ...............................................................31
Overall Procedure...........................................................31
Adjustment Equipment....................................................31
Opening the Case...........................................................32
Adjustment Point ...........................................................33
Output Voltage Adjustment..............................................37
Tracking Series Voltage Adjustment ..................................40
Output Current Adjustment .............................................42
Tracking Parallel Current Adjustment.................................
Overload Indicator Adjustment.........................................
3
44
46
GPS Verification/ Adjustment Manual
How to Use this Manual
This manual describes how to verify and adjust the performance of
GPS-4303/ 4251/ 3303/ 2303 Multiple Output D.C. Power Supplies.
Specification, page
It also shows the locations of relevant verification and adjustment
procedures in this manual.
Front Panel, page
indicators. The Default Settings column shows the basic panel settings
applicable to all verification and adjustment items.
Performance Verification, page9, shows how to verify GPS performance,
step by step. Check the necessary equipment and the overall procedure
before start working on each item.
Adjustment, page31, shows how to adjust GPS specification. Same as
Performance Verification, check the equipment and the overall procedure
before start working on each item.
5, shows GPS electronic and mechanical specifications.
7, describes the front panel switches, terminals, and
4
Specification
Specification
GPS-4303
Output Mode CH1, 2 CH3 CH4 Verification Adjustment
Voltage 0 ~ 30V 2.2 ~ 5.2V 8 ~ 15V Page10 Page37
Current 0 ~ 3A 1A Max. 1A Max. Page14 Page42
Tracking Series
Voltage
Tracking Parallel
Current
Output Mode CH1, 2 CH3 CH4 Verification Adjustment
Voltage 0 ~ 25V 3 ~ 6V 8 ~ 15V Page10 Page37
Current 0 ~ 0.5A 2.5A Max. 1A Max Page14 Page42
Tracking Series
Voltage
Tracking Parallel
Current
Output Mode CH1, 2 CH3 CH4 Verification Adjustment
Voltage 0 ~ 30V 5V Fixed --- Page10 Page37
Current 0 ~ 3A 3A Max. --- Page14 Page42
Tracking Series
Voltage
Tracking Parallel
Current
Output Mode CH1, 2 CH3 CH4 Verification Adjustment
Voltage 0 ~ 30V --- --- Page10 Page37
Current 0 ~ 3A --- --- Page14 Page42
Tracking Series
Voltage
Tracking Parallel
Current
0 ~ 60V --- --- Page
0 ~ 6A --- --- Page
GPS-4251
0 ~ 50V --- --- Page
0 ~ 1A --- --- Page
GPS-3303
0 ~ 60V --- --- Page
0 ~ 6A --- --- Page
GPS-2303
0 ~ 60V --- --- Page
0 ~ 6A --- --- Page
12 Page40
16 Page44
12 Page40
16 Page44
12 Page40
16 Page44
12 Page40
16 Page44
(Continued on next page)
5
GPS Verification/ Adjustment Manual
Constant Voltage Operation (CH1, CH2) Verifi c ation Adju s tment
Line Regulation ≤ 0.01% + 3mV --- ---
Load Regulation
Ripple & Noise ≤ 1mVrms, 5Hz ~ 1MHz Page26 ---
Recovery Time
Constant Current Operation (CH1, CH2) Verificati o n Adjustme n t
Line Regulation ≤ 0.2% + 3mA --- --Load Regulation ≤ 0.2% + 3mA Page18 --Ripple Current ≤ 3mArms Page20 ---
Tracking Operation (CH1, CH2) Verifi c ation Adju s tment
Tracking Error ≤ 0.5%(CH1) + 10mV Page12 Page41
Series Regulation ≤ 300mV --- --Load Regulation ≤ 0.01% + 3mV Page24 --Ripple & Noise ≤ 2mVrms, 5Hz ~ 1MHz Page24 ---
Line Regulation ≤ 5mV --- --Load Regulation ≤ 15mV Page22 --Ripple & Noise ≤ 2mVrms, 5Hz ~ 1MHz Page26 ---
Line Regulation ≤ 5mV --- --Load Regulation ≤ 10mV Page22 --Ripple & Noise ≤ 2mVrms, 5Hz ~ 1MHz Page26 ---
Model 3 Digits, 0.5” LED display --- --Out ON Accuracy ± (0.5% rdg + 2 digits) Page10, 14 Page38, 43
Out OFF Accuracy
Chassis and Terminal ≥ DC 500V/ 20MΩ --- --Chassis and AC Cord ≥ DC 500V/ 30MΩ --- ---
AC 100V/ 120V/ 220V (± 10%)/ 230V (+10% ~ −6%), 50/ 60Hz --- ---
255(W) x 145(H) x 265(D) mm, 7kg *GPS-4251: 6.3kg --- ---
≤ 0.01% + 3mV (rating current ≤ 3A)
≤ 0.02% + 5mV (rating current > 3A)
≤ 100μS (50% Load Change,
Minimum Load 0.5A)
CH3 Output Verifi c ation Adju s tment
CH4 Output Verifi c ation Adju s tment
Meter Verificat i on Adjustm e nt
± (0.5% rdg + 8 digits)
* GPS-2303: ± (0.5% rdg + 2 digits)
Insulation Ve rificatio n A djustmen t
Power Source Ver i f ication A d j ustment
Dimensions & Weight Verifi c ation Adju s tment
Page22 ---
--- ---
Page
14, 16
10, 12,
Page
43, 45
39, 41,
6
Front Panel
Front Panel
Description and Default Settings
No Description
Default
Settings
GPS-
4303
GPS-
4251
GPS-
3303
GPS-
2303
1 Power Switch ON * * * *
2 CH4 − Output Terminal * *
3 CH4 + Output Terminal * *
CH2 C.V./ C.C. Indicator
Green : Constant Voltage (C.V.)
4
Red : Constant Current (C.C.)
* * * *
5 CH2 − Output Terminal * * * *
6 CH2 + Output Terminal * * * *
7 GND Terminal
Connect to
Ground
* * * *
8 CH1 − Output Terminal Connected * * * *
9 CH1 + Output Terminal Connected * * * *
7
GPS Verification/ Adjustment Manual
No Description
CH1 C.V./ C.C. Indicator
10
Green : Constant Voltage (C.V.)
Red : Constant Current (C.C.)
Default
Settings
* * * *
GPS-
4303
GPS-
4251
GPS-
3303
GPS-
2303
11 CH3 − Output Terminal * * *
12 CH3 + Output Terminal * * *
13 CH3 Overload Indicator * * *
14 CH1/ CH3 Selector CH1 * *
15 CH3 Voltage Control Minimum * *
16 CH1 Voltage Control Minimum * * * *
17 CH1/ CH3 Voltage Meter * *
CH1
Only
CH1
Only
18 CH1 Current Control Minimum * * * *
19 CH1/ CH3 Current Meter * *
20
22
Mode Switch
Independent
Series
Parallel
Independent
* * * *
CH1
Only
CH1
Only
21 CH2/ CH4 Voltage Meter * *
CH2
Only
CH2
Only
23 CH2 Voltage Control Minimum * * * *
24 CH2/ CH4 Current Meter * *
CH2
Only
CH2
Only
25 CH2 Current Control Minimum * * * *
26 CH4 Voltage Control Minimum * *
27 CH2/ CH4 Selector CH2 * *
28 Output Switch OFF * * * *
29 Output Indicator * * * *
30 CH4 Overload Indicator * *
8
Performance Verification
Performance Verification
Overall Procedure
1. Prepare the Equipment according to the following table.
2. Set the front panel according to the
3. Verify a specification item and record the result (page10 to 26).
The recording tables are at the end of this chapter (page28).
4. Repeat step 3 for all items.
5. In case of over- or under-specification, continue with the
relevant item in the Adjustment chapter (page31).
Verification Equipment
Equipment Required Specification Used in
• AC & DC Voltage
Digital
Multimeter
2nd Digital
Multimeter
Electronic Load
AC Power
Supply
GPS –
Multimeter
cable
GPS – 2nd
Multimeter
cable
GPS –
Electronic Load
cable
Calculator
Accuracy: < ±0.1%
• DC Current Range: ≥ 6A
• DC Current Accuracy:
<±0.1%
• AC & DC Voltage
Accuracy: < ±0.1%
• DC Voltage Range: ≥ 60V
• DC Current Range: ≥ 6A
• CV, CC, CR Mode
• Short Mode
• Capacity: ≥ 1k VA
• Frequency: 50 – 60Hz
• Line Voltage: ±10%
*230V: −6% ~ +10%
• Vo lt ag e rating: > 60V
• Current rating: > 6A
• Vo lt ag e rating: > 30V • Ripple Current
• Vo lt ag e rating: > 60V
• Current rating: > 6A
• For calculating the
acceptance ranges
• Ripple Current
• Load Regulation
• Ripple Voltage
• Ripple Current
• Ripple Voltage
• Load Regulation
• Ripple Voltage
• Ripple Current
All items
All items ---
All items ---
Default Settings
Recommended
• GDM-8245
• GDM-8246
• GDM-8245
• GDM-8246
• Agilent
N3305A
• APS-9102
• Agilent 6813B
---
---
(page7).
Model
9
GPS Verification/ Adjustment Manual
Output Voltage Verification
Here we verify Minimum Output Voltage, Maximum Output Voltage, and
Voltage Meter Accuracy.
Connection
GPS Series
Digital Multimeter
V
A
-1 +
- 3 +- 2 +- 4 +
Verification steps
1. Set the front panel according to
Default Settings
, page7.
2. Connect the Multimeter to CH1 and turn ON the Output
Switch.
Minimum Output V oltage
3. (CH1, CH2 only) Turn up the Current Control to full.
4. (CH1, CH2 only) Make sure the indicator shows C.V. (green).
5. Record the Multimeter readout as Minimum Output Voltage.
Maximum Output Voltage
6. Turn up the Voltage Control to full.
10
7. (CH1, CH2 only) Make sure the indicator shows C.V. (green).
8. Record the Multimeter readout as Maximum Output Voltage.
Out ON Meter Accuracy
9. Record the GPS readout. Calculate the difference between the
previous Multimeter readout and record it as Out ON Meter
Accuracy.
Out OFF Meter Accuracy
10. Turn OFF the Output Switch.
Performance Verification
11. Record the GPS readout. Calculate the difference between the
previous GPS readout (Output ON) and record it as Out OFF
Meter Accuracy.
12. Switch the GPS connection to the next channel and turn ON
the Output Switch.
13. Repeat step 3 to 12 for CH2, CH3, and CH4.
Acceptance range: Output Voltage
GPS-4303 GPS-4251 GPS-3303 GPS-2303
Min: < −30mV
CH1
Max: 30V +3% ~
+8% (30.9 ~ 32.4)
Min: < −30mV
CH2
Max: > CH1 +0.2V
Min: 2.2V ±8%
(2.024 ~ 2.376)
CH3
Max: 5.2V ±8%
(4.784 ~ 5.616)
Min: 8.0V ±8% (7.36 ~ 8.64)
CH4
Max: 15.0V ±8% (13.8 ~ 16.2)
Min: < −30mV
Max: 25V +3% ~
+8% (25.75 ~ 27)
Min: 3.0V ±8%
(2.76 ~ 3.24)
Max: 6.0V ±8%
(5.52 ~ 6.48)
Min: < −30mV
Max: 30V +3% ~ +8% (30.9 ~
32.4)
Min: < −30mV
Max: > CH1 +0.2V
Min: 5.0V ±8%
(4.6 ~ 5.4)
Max: N/A
Acceptance range: Voltage Meter Accuracy
GPS-4303 GPS-4251 GPS-3303 GPS-2303
Out ON:
CH1
Out ON: ±(0.5% rdg + 2digits)
CH2
Out OFF: ±(0.5% rdg + 8digits)
CH3 N/A
CH4
±(0.5% rdg +
2digits)
Out OFF:
±(0.5% rdg +
8digits)
Out ON:
±(0.5% rdg +
2digits)
Out OFF: N/A
When out of range…
Refer to
11
Output Voltage
adjustment, page37.
GPS Verification/ Adjustment Manual
Tracking Series Voltage Verification
Here we verify Tracking Series Minimum Voltage, Tracking Error, and
Tracking Series Meter Accuracy.
Connection
GPS Series
Digital Multimeter
V
A
-1 +
- 3 +- 2 +- 4 +
Verification steps
1. Set the front panel according to
Default Settings
, page7.
2. Connect the Multimeter to CH1 and turn ON the Output
Switch.
Tracking Series Minimum Voltage
3. Turn up the Current Control to full and set the Tracking
Switch to Series .
4. Make sure the indicator shows C.V. (green) for both CH1 and
CH2.
5. Turn up the Voltage control to 1.0V and record the Multimeter
12
readout.
6. Switch the GPS connection to CH2, turn up the Current
Control to full, and record the Multimeter readout.
7. Calculate the difference between the CH1 readout and record
it as Tracking Series Minimum Voltage.
Tracking Error
8. Switch the GPS connection to CH1, turn up the Voltage
Control to full, and record the Multimeter readout.
Performance Verification
9. Make sure the indicator shows C.V. (green) for both CH1 and
CH2.
10. Switch the GPS connection to CH2, turn up the Voltage
Control to full, and record the Multimeter readout.
11. Calculate the difference between CH1 and record it as
Tracking Error.
Tracking Series Meter Accuracy
12. Switch the GPS connection to CH1 and record the GPS
readout. Turn OFF the Output Switch and record the GPS
readout.
13. Calculate the difference between Output ON and OFF GPS
readout and record it as CH1 Tracking Series Meter Accuracy.
14. Switch the GPS connection to CH2 and record the GPS
readout. Turn ON the Output Switch and record the GPS
readout.
15. Calculate the difference between Output ON and OFF GPS
readout and record it as CH2 Tracking Series Meter Accuracy.
Acceptance range
GPS-4303 GPS-4251 GPS-3303 GPS-2303
Minimum Voltage: ±10mV
Error: ≤ 0.5% of CH1 + 10mV
CH1
CH2
Meter Accuracy: ±(0.5% rdg +
8digits)
Minimum Voltage: ±10mV
Error: ≤ 0.5% of CH1 + 10mV
Meter
Accuracy: ±
(0.5% rdg +
8digits)
N/A
When out of range…
Refer to
Tracking Series Voltage
adjustment, page40.
13
GPS Verification/ Adjustment Manual
Output Current Verification
Here we verify Minimum Output Current, Maximum Output Current, and
Current Meter Accuracy.
Connection
GPS Series
Digital Multimeter
V
A
-1 +
- 3 +- 2 +- 4 +
Verification steps
1. Set the front panel according to
Default Settings
, page7.
2. Connect the Multimeter to CH1 and turn ON the Output
Switch.
Minimum Output Current
3. Turn up the Voltage Control to full.
4. (CH1, CH2 only) Make sure the indicator shows C.C. (red).
5. (CH1, CH2 only) Record the Multimeter readout as Minimum
Output Current.
Maximum Output Current
14
6. (CH1, CH2 only) Turn up the Current Control to full.
7. (CH1, CH2 only) Make sure the indicator shows C.C. (red).
8. (CH3, CH4 only) Make sure the Overload indicator turns on.
9. Record the Multimeter readout as Maximum Output Current.
Out ON Meter Accuracy
10. Record the GPS readout. Calculate the difference between the
previous Multimeter readout and record it as Out ON Meter
Accuracy.
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