Gw-instek APS-1102 User Manual Manuel d'utilisateur Page 78
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Noté. / 5. Basé sur avis des utilisateurs
4.2 Measurement of Inrush Current
APS-1102 Programmable AC/DC Power Source 4-14
4.2 Measurement of Inrush Current
4.2.1 Inrush current
In such an electrical product as contains a capacitor input type rectifier circuit for the input power line,
a current that is larger than the rated current may flow for a short time immediately after the power
source switch is turned on. This current is called an “inrush current.”
If the power source is not able to supply such a large current, enough power is not supplied to the
product, and sometimes it does not start in the worst case.
On the other hand, when such a large current passes through the power source line, the supply voltage
is likely to decrease because of the voltage drop at the line impedance. There exists a standard to limit
this effect within a certain level.
Such a product should be driven by a power source with enough supply capacity
Example of an inrush current
An electric drill
(rated 100 V AC/380 W)
Upper: Voltage (100 V/div)
Lower: Inrush current (10 A/div)
Even in a small electric drill, an inrush current of 15 Apk flows right after the power source is turned
on. Since the rated current is 3.8 A, this represents a fourfold increase in the current flow.
The APS-1102 can supply four times as a large peaked current as the rated current supporting such a
usage. There is no need to use a power source with an extra large capacity in order to supply the inrush
current (for a capacitor input circuit of CF = 4 or less).
The initial phase of the output AC voltage is adjustable from 0.0 to 359.9 (in 0.1 steps), so the user
can monitor how the current rushes in the load under various phase conditions. The peak current hold
measurement function enables the measurement of the maximum peak value for the current flowing at
that time.
When measuring the inrush current, set the peak current limiter to the maximum value. If the limiter
setting is lowered, the inrush current measurement may be incorrect.
- APS-1102 1
- USER MANUAL 1
- Preface 3
- Safety Precautions 4
- Contents 6
- Figures 10
- OVERVIEW 15
- 1.1 General 16
- 1.2 Features 16
- 1.3 Applications 17
- 1.4 List of Functions 18
- 1.5 Operation Principles 20
- PREPARATIONS BEFORE USE 21
- 2.1 Checking Before Use 22
- Installation sites 23
- Cautions for transport 23
- WARNING 25
- 2.4 Simple Operation Checks 28
- 2.5 Calibration 30
- PANEL AND BASIC OPERATIONS 31
- 3.1.1 Operation panel 32
- 3.1.2 Front panel 33
- 3.1.3 Rear panel 34
- Display at power-on 35
- Initial settings 35
- At Power-on 36
- 3.3 I/O Terminals 37
- 3.3.2 USB connector 40
- 3.3.3 External control I/O 41
- External signal input/ 43
- 3.4 Main Operation Example 44
- 3.4.1 Power on/off 45
- Output on 46
- Output off 46
- 3.4.2 Setting output mode 47
- Status window 50
- 3.4.4 Setting waveform 51
- Modification box 58
- Output on/off LED on 59
- 3.5 Output Characteristics 63
- Maximum output power = 750 W 64
- ADVANCED OPERATION EXAMPLE 65
- Selection box 68
- 4.2.1 Inrush current 78
- EXEC box 82
- 4.4.1 Sequence operations 85
- phase 91
- 4.4.2 Sequence settings 92
- Operation step <1> 97
- IncreaseDecrease 98
- Operation step <2> 99
- Operation steps 100
- Operation step 101
- Setting step 1 104
- Selection box 105
- Setting step 2 106
- STOPSTART 107
- LOCALHOLD 107
- SEQUENCE 107
- Output on/off LED is on 108
- Step number being executed 110
- ENTERCANCEL 113
- Output waveform example 114
- External sync signal (TTL) 114
- 4.8 Using Memory Functions 117
- Indication on Control Panel 118
- CAUTION 121
- Increase 123
- Decrease 123
- 5. MENUS 127
- 5.1 Screen Configuration 129
- 5.1.1 Status icons 131
- 5.1.3 Sequence display 132
- 5.2.1 Menus 133
- 5.2.5 EXEC input 140
- 5.2.6 Shortcut keys 140
- 5.3 SET Menu 141
- 5.3.1 Output mode setting 142
- 5.3.6 Waveform settings 145
- 5.4 MEASURE Screen 148
- 5.5 MISC Menu 153
- 5.5.2 Memory (MEMORY) 157
- 5.6 System Menu 162
- USB INTERFACE 173
- 6.1 Setup for Use 174
- 6.2 Command List 175
- 6.3 Command Descriptions 181
- Non-zero 182
- Numerals 182
- 8-bit data byte 182
- Root level 183
- Current path 183
- :SOUR:FREQ 1000 184
- [SOURce:]MODE 189
- [SOURce:]PHASe:CLOCk 189
- [SOURce:]SEQuence:CSTep? 190
- [SOURce:]SEQuence:LEN? 190
- [SOURce:]SEQuence:COUNt? 191
- [SOURce:]SEQuence:DELete 191
- [SOURce:]SEQuence:STEP 194
- [SOURce:]VOLTage:RANGe 195
- STATus:OPERation:ENABle 202
- STATus:OPERation[:EVENt]? 202
- STATus:WARNing:CONDition? 203
- STATus:WARNing:ENABle 204
- STATus:WARNing[:EVENt]? 204
- OUTPut[:STATe] 205
- INPut:GAIN 205
- TRACe:CATalog? 206
- TRACe[:DATA] 206
- TRACe:DELete[:NAME] 207
- SYSTem:BEEPer:STATe 207
- SYSTem:CONFigure:EXTIO 207
- SYSTem:ERRor? 208
- SYSTem:PON[:OUTPut] 208
- SYSTem:TUNit 208
- SYSTem:WRELease 209
- CLS 210
- ESE 210
- ESR? 210
- IDN? 211
- OPC 211
- RCL 211
- RST 212
- SRE 212
- STB? 212
- TST? 213
- WAI 213
- CONFigure 214
- 6.5.1 Status byte 216
- 6.5.3 Operation status 219
- 6.5.4 Warning status 220
- 6.6 Error Message List 221
- 6.7 Programming Precautions 222
- TROUBLESHOOTING 223
- 7.1 Protection Function 224
- 7.2.1 Error at power-on 227
- Message box 230
- 7.2.4 Warning messages 232
- 7.3 When Fault Is Suspected 235
- LCD contrast adjustment” 236
- Keylock” 236
- MEASURE 239
- MAINTENANCE 241
- 8.1 Introduction 242
- 8.2 Routine Maintenance 242
- 8.5 Backup Battery 247
- SPECIFICATIONS 249
- 9.1 Output 250
- Output terminals 251
- Rated output 251
- Output voltage settings 251
- Maximum output current 251
- Line regulation 253
- Output DC offset 253
- 9.2 Current Limiter 254
- 9.3 Setting Range Limits 254
- 9.4 Signal Sources 255
- 9.5 Measurement Functions 256
- Output power measurement 257
- 9.6 Sequence Function 258
- 9.8 Setting Memory 259
- 9.9 Protection Functions 259
- 9.10 General 260
- 9.11 External Control I/O 261
- 9.12 USB Interface 261
- 9.13 Power Input 261
- Withstand voltage 262
- Insulation resistance 262
- Safety 262
- EMC Compliance 262
- External dimensions 263
- Weight 263
- ◎ Safety 265
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